Electronic device for reducing noise of low light environment and method for operating thereof

Abstract

According to various embodiments, the electronic device comprises a power converter; a camera module; and a processor, wherein the processor checks a first illuminance value around the electronic device while the switching frequency of the power converter delivering power to the camera module is a first frequency, determines whether the first illuminance value satisfies a first criterion, and, based on the fact that the first illuminance value satisfies the first criterion, may be configured to set the switching frequency of the power converter to a second frequency different from the first frequency.

Description

Technology Field

[0001] Various embodiments of the present invention relate to an electronic device for removing low-light noise and a method of operating the same. Background Technology

[0002] The electronic device can use battery power as the analog power source for the camera module by converting DC to DC using a converter. The converter may use a switching method to convert battery power into power usable by the camera module. The switching frequency may be determined based on the current consumption of the output terminal, and the converter may operate in a high-frequency mode or a low-frequency mode. The problem to be solved

[0003] When the converter operates at a specific frequency, power-related noise may occur in camera images in low-light environments with dim ambient light.

[0004] Power supply low-light noise may refer to noise generated in the image sensor scan direction due to noise induced by periodic switching in the analog power supply that serves as the reference for the camera sensor's ADC (Analog to Digital Converter) in an environment with low ambient light.

[0005] An electronic device for removing low-light noise according to various embodiments of the present invention can remove low-light noise by changing the switching frequency in a low-light environment.

[0006] The technical problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0007] According to various embodiments, the electronic device comprises a power converter; a camera module; and a processor, wherein the processor checks a first illuminance value around the electronic device while the switching frequency of the power converter delivering power to the camera module is a first frequency, determines whether the first illuminance value satisfies a first criterion, and, based on the fact that the first illuminance value satisfies the first criterion, may be configured to set the switching frequency of the power converter to a second frequency different from the first frequency.

[0008] According to various embodiments, a method of operating an electronic device may include: checking a first illuminance value around the electronic device while the switching frequency of the power converter of the electronic device that delivers power to the camera module of the electronic device is a first frequency, and determining whether the first illuminance value satisfies a first criterion; and setting the switching frequency of the power converter to a second frequency different from the first frequency based on the fact that the first illuminance value satisfies the first criterion. Effects of the invention

[0009] According to various embodiments, the electronic device can eliminate low-light noise.

[0010] By providing an electronic device for removing low-light noise and a method of operation thereof according to various embodiments, low-light noise caused by the analog power supply provided to the camera module can be improved. Accordingly, the user can obtain a clear image without being affected by the surrounding environment. Brief explanation of the drawing

[0011] FIG. 1 is a block diagram of an electronic device in a network environment according to various embodiments. FIG. 2 is a block diagram of an electronic device according to various embodiments. FIG. 3 is a flowchart illustrating a method of operation of an electronic device according to various embodiments. FIG. 4 is a flowchart illustrating a method of operation of an electronic device according to various embodiments. FIG. 5a is a flowchart illustrating a method of operation of an electronic device according to various embodiments. FIG. 5b is a flowchart illustrating a method of operation of an electronic device according to various embodiments. FIG. 6 is a flowchart illustrating a method of operation of an electronic device according to various embodiments. FIG. 7 is a drawing for explaining the operation of an electronic device according to various embodiments. FIG. 8 is a flowchart illustrating a method of operation of an electronic device according to various embodiments. FIG. 9 is a drawing for explaining the operation of an electronic device according to various embodiments. FIG. 10 is a flowchart illustrating a method of operation of an electronic device according to various embodiments. FIG. 11 is a flowchart illustrating a method of operation of an electronic device according to various embodiments. Specific details for implementing the invention

[0012] FIG. 1 is a block diagram of an electronic device in a network environment according to various embodiments.

[0013] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) through a first network (198) (e.g., a short-range wireless communication network) or with an electronic device (104) or a server (108) through a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) through a server (108). According to one embodiment, the electronic device (101) may include a processor (120), memory (130), input module (150), sound output module (155), display module (160), audio module (170), sensor module (176), interface (177), connection terminal (178), haptic module (179), camera module (180), power management module (188), battery (189), communication module (190), subscriber identification module (196), or antenna module (197). In some embodiments, at least one of these components (e.g., connection terminal (178)) may be omitted from the electronic device (101), or one or more other components may be added. In some embodiments, some of these components (e.g., sensor module (176), camera module (180), or antenna module (197)) may be integrated into a single component (e.g., display module (160)).

[0014] The processor (120) can control at least one other component (e.g., hardware or software component) of the electronic device (101) connected to the processor (120) by executing software (e.g., program (140)), for example, and can perform various data processing or operations. According to one embodiment, as at least part of the data processing or operations, the processor (120) can store commands or data received from other components (e.g., sensor module (176) or communication module (190)) in volatile memory (132), process the commands or data stored in volatile memory (132), and store the resulting data in non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., central processing unit or application processor) or an auxiliary processor (123) that can operate independently or together with it (e.g., graphics processing unit, neural processing unit (NPU), image signal processor, sensor hub processor, or communication processor). For example, if the electronic device (101) includes a main processor (121) and an auxiliary processor (123), the auxiliary processor (123) may be configured to use lower power than the main processor (121) or to be specialized for a designated function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as part thereof.

[0015] The auxiliary processor (123) may control at least some of the functions or states associated with at least one component of the electronic device (101) (e.g., display module (160), sensor module (176), or communication module (190)) on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. According to one embodiment, the auxiliary processor (123) (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module (180) or communication module (190)). According to one embodiment, the auxiliary processor (123) (e.g., neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. The artificial intelligence model may be generated through machine learning. Such learning may be performed, for example, on the electronic device (101) itself where the artificial intelligence is performed, or through a separate server (e.g., server (108)). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model may include a plurality of artificial neural network layers.An artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0016] The memory (130) can store various data used by at least one component of the electronic device (101) (e.g., processor (120) or sensor module (176)). The data may include, for example, input data or output data for software (e.g., program (140)) and related commands. The memory (130) may include volatile memory (132) or non-volatile memory (134).

[0017] The program (140) may be stored as software in memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0018] The input module (150) can receive commands or data to be used for a component of the electronic device (101) (e.g., processor (120)) from outside the electronic device (101) (e.g., user). The input module (150) may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0019] The sound output module (155) can output a sound signal to the outside of the electronic device (101). The sound output module (155) may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as multimedia playback or recording playback. The receiver may be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part thereof.

[0020] The display module (160) can visually provide information to an external (e.g., user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling said device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of the force generated by said touch.

[0021] The audio module (170) can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150) or output sound through the sound output module (155) or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphones) connected directly or wirelessly to the electronic device (101).

[0022] The sensor module (176) can detect the operating state of the electronic device (101) (e.g., power or temperature) or the external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module (176) may include, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0023] The interface (177) may support one or more specified protocols that can be used for the electronic device (101) to be connected directly or wirelessly to an external electronic device (e.g., electronic device (102)). According to one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0024] The connection terminal (178) may include a connector through which the electronic device (101) can be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0025] The haptic module (179) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module (179) may include, for example, a motor, a piezoelectric element, or an electric stimulation device.

[0026] The camera module (180) can capture still images and video. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0027] The power management module (188) can manage the power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented, for example, as at least part of a power management integrated circuit (PMIC).

[0028] The battery (189) can supply power to at least one component of the electronic device (101). According to one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0029] The communication module (190) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between an electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may include one or more communication processors that operate independently of the processor (120) (e.g., application processor) and support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., cellular communication module, short-range wireless communication module, or GNSS (global navigation satellite system) communication module) or a wired communication module (194) (e.g., LAN (local area network) communication module, or power line communication module). The corresponding communication module among these communication modules can communicate with an external electronic device (104) through a first network (198) (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network (199) (e.g., a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can identify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) using subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module (196).

[0030] The wireless communication module (192) can support 5G networks and next-generation communication technologies following 4G networks, for example, new radio access technology. NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and connection of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low-latency communications (URLLC)). The wireless communication module (192) can support a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate, for example. The wireless communication module (192) can support various technologies for securing performance in the high-frequency band, such as beamforming, massive MIMO (multiple-input and multiple-output), full-dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large-scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), external electronic device (e.g., electronic device (104)), or network system (e.g., second network (199)). According to one embodiment, the wireless communication module (192) can support a Peak data rate (e.g., 20 Gbps or more) for realizing eMBB, loss coverage (e.g., 164 dB or less) for realizing mMTC, or U-plane latency (e.g., downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) for realizing URLLC.

[0031] An antenna module (197) can transmit a signal or power to or from an external source (e.g., an external electronic device). According to one embodiment, the antenna module (197) may include an antenna comprising a radiator made of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as a first network (198) or a second network (199), may be selected from the plurality of antennas, for example, by a communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device through the selected at least one antenna. According to some embodiments, in addition to the radiator, other components (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module (197).

[0032] According to various embodiments, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (e.g., bottom surface) of the printed circuit board and capable of supporting a specified high frequency band (e.g., mmWave band), and a plurality of antennas (e.g., array antennas) disposed on or adjacent to a second surface (e.g., top surface or side surface) of the printed circuit board and capable of transmitting or receiving a signal of the specified high frequency band.

[0033] At least some of the above components can be connected to each other via a communication method between peripheral devices (e.g., bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)) and exchange signals (e.g., commands or data) with each other.

[0034] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) through a server (108) connected to a second network (199). Each of the external electronic devices (102, or 104) may be the same or different type of device as the electronic device (101). According to one embodiment, all or part of the operations performed on the electronic device (101) may be performed on one or more of the external electronic devices (102, 104, or 108). For example, if the electronic device (101) needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device (101) may request one or more external electronic devices to perform at least part of the function or service instead of performing the function or service itself or additionally. One or more external electronic devices that receive the above request may execute at least part of the requested function or service, or additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may provide the result as is or additionally processed as at least part of the response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device (101) may provide ultra-low latency services using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server using machine learning and / or neural networks. According to one embodiment, the external electronic device (104) or the server (108) may be included within a second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0035] FIG. 2 is a block diagram of an electronic device according to various embodiments.

[0036] Referring to FIG. 2, an electronic device (101) according to one embodiment may include a processor (120), an illuminance sensor (220), a camera module (180), a battery (189), a power converter (210), and / or a display module (160).

[0037] According to one embodiment, the light sensor (220) may be included in the sensor module (176) of FIG. 1. According to another embodiment, the light sensor (220) may be included in the camera module (180). Alternatively, according to another embodiment, the light sensor (220) may be configured as a separate device, and there are no limitations on the form of the light sensor (220).

[0038] According to one embodiment, an electronic device (101) (e.g., a processor (120)) can check the ambient brightness of the electronic device (101) using an illuminance sensor (220). For example, the electronic device (101) can check the ambient brightness of the electronic device (101) based on an illuminance value obtained using the illuminance sensor (220), and there are no limitations on the method of checking the ambient brightness using the illuminance sensor (220).

[0039] According to one embodiment, an electronic device (101) (e.g., a processor (120)) can supply converted power to a camera module (180) by converting power provided from a battery (189) using a power converter (210). For example, the power converter (210) can convert a first power having a first power value provided from the battery (189) into a second power having a second power value and supply it to the camera module (180). According to one embodiment, the power converter (210) can convert power using a switching method. For example, the power converter (210) can convert a first power (e.g., DC power) into a second power (e.g., DC power) based on a switching frequency that is applied periodically. According to one embodiment, the power converter (210) can operate when the switching frequency is a first frequency (e.g., low frequency) or when the switching frequency is a second frequency (e.g., high frequency). The switching frequency of the power converter (210) may be a frequency having various magnitudes in addition to the first frequency or the second frequency, and there is no limit to the magnitude of the switching frequency used for the operation of the power converter (210). In the following, frequency or magnitude of frequency may refer to the frequency of vibration (Hz). The magnitude of the first frequency (e.g., low frequency) used for the operation of the power converter (210) may be smaller than the magnitude of the second frequency (e.g., high frequency), and there is no limit to the magnitude of the first frequency (e.g., low frequency) and / or the magnitude of the second frequency (e.g., high frequency). According to one embodiment, the switching frequency being low frequency may mean that the switching frequency is 100 kHz or lower, and the switching frequency being high frequency may mean that the switching frequency is 2 MHz or higher, but there is no limit to the reference values ​​that serve as the reference for the low frequency and high frequency.

[0040] According to one embodiment, the magnitude of the switching frequency used for the operation of the power converter (210) may correspond to the load current at the output terminal. For example, the electronic device (101) may determine the magnitude of the switching frequency used for the operation of the power converter (210) based on the magnitude of the load current required at the output terminal.

[0041] FIG. 3 is a flowchart illustrating a method of operation of an electronic device according to various embodiments.

[0042] Referring to FIG. 3, in operation 301, according to various embodiments, an electronic device (101) (e.g., a processor (120)) can determine that the switching frequency of a power converter (210) that supplies power to a camera module (180) is low frequency (e.g., a first frequency). For example, the processor (120) can control (or set) the switching frequency of the power converter (210) to a low frequency (e.g., a first frequency). For example, the electronic device (101) can control (or set) the power converter (210) to operate at a switching frequency that is less than or equal to a preset reference value (e.g., 100 kHz), and there is no limit to the magnitude of the reference value.

[0043] In operation 303, according to various embodiments, the electronic device (101) can check an illuminance value around the electronic device (101) (e.g., a first illuminance value) and check that the illuminance value around the electronic device (101) (e.g., a first illuminance value) satisfies a preset standard (e.g., a first standard). For example, the electronic device (101) can check an illuminance value (e.g., a first illuminance value) obtained using an illuminance sensor (220). In another example, the electronic device (101) can check an illuminance value around the electronic device (101) (e.g., a first illuminance value) based on the pixel value of an image obtained through a camera module (180). For example, the electronic device (101) may determine that the first illuminance value satisfies a preset standard (e.g., a first standard) based on the fact that the first illuminance value obtained using an illuminance sensor (220) or the pixel value of an image obtained through a camera module (180) is less than or equal to a preset standard value (e.g., 20 Lux) when the switching frequency of the power converter (210) is low frequency (e.g., a first frequency). In another example, the electronic device (101) may determine that the first illuminance value satisfies a preset standard (e.g., a first standard) based on the fact that the first illuminance value, which is confirmed based on the pixel value of an image obtained through the camera module (180) or the first illuminance value obtained using the illuminance sensor (220) when the switching frequency of the power converter (210) is low frequency (e.g., a first frequency), is maintained at a state of being less than or equal to a preset standard value (e.g., 20 Lux) for a preset first time (e.g., 3 seconds).According to one embodiment, the electronic device (101) may determine that the surrounding environment of the electronic device (101) is a low-light environment based on whether an illuminance value (e.g., a first illuminance value) obtained using an illuminance sensor (220) or an illuminance value (e.g., a first illuminance value) confirmed based on pixel values ​​of an image obtained through a camera module (180) satisfies a preset standard (e.g., a first standard). In another embodiment, the electronic device (101) may determine the illuminance value based on at least some pixel values ​​of a captured image. For example, if at least some pixel values ​​satisfy a specified condition, the electronic device (101) may determine the surrounding illuminance (e.g., determine that the surrounding environment is a low-light environment), and in this case, the illuminance may be determined without using the illuminance sensor (220) (e.g., determine whether it is a low-light environment).

[0044] In operation 305, according to various embodiments, the electronic device (101) may set the switching frequency of the power converter (210) to a second frequency (e.g., high frequency) that is different from the first frequency (e.g., low frequency) (e.g., having a frequency higher than the frequency of the first frequency) based on the fact that the illuminance value (e.g., first illuminance value) obtained using the illuminance sensor (220) or the illuminance value (e.g., first illuminance value) identified based on the pixel value of an image obtained through the camera module (180) satisfies a preset standard (e.g., first standard). For example, the electronic device (101) may set the switching frequency of the power converter (210) to a high frequency that is higher than or equal to a preset standard value (e.g., 2 MHz) based on the fact that the surrounding environment of the electronic device (101) is a low illuminance environment, and there is no limit to the magnitude of the standard value.

[0045] According to various embodiments, the electronic device (101) can provide an image with improved low-light noise by performing the operation disclosed in FIG. 3.

[0046] FIG. 4 is a flowchart illustrating a method of operation of an electronic device according to various embodiments.

[0047] Referring to FIG. 4, in operation 401, according to various embodiments, an electronic device (101) (e.g., processor (120)) can confirm that noise occurs in an image obtained through a camera module (180) when an illuminance value (e.g., a first illuminance value) obtained using an illuminance sensor (220) or an illuminance value (e.g., a first illuminance value) confirmed based on pixel values ​​of an image obtained through a camera module (180) satisfies a preset standard (e.g., a first standard). For example, the electronic device (101) can confirm that noise occurs in the image obtained through the camera module (180) when the switching frequency of the power converter (210) is a low frequency (e.g., a first frequency) and the illuminance value obtained using the illuminance sensor (220) (e.g., a first illuminance value) or the illuminance value confirmed based on the pixel value of the image obtained through the camera module (180) (e.g., a first illuminance value) satisfies a preset standard (e.g., 20 Lux or less, or a state of 20 Lux or less lasting for 3 seconds or more). The method by which the electronic device (101) confirms the occurrence of noise will be described later.

[0048] In operation 403, according to various embodiments, the electronic device (101) can set the switching frequency of the power converter (210) to a second frequency (e.g., high frequency) higher than the first frequency (e.g., low frequency) based on confirming that noise occurs in the image obtained through the camera module (180) while the illuminance value (e.g., first illuminance value) obtained using the illuminance sensor (220) or the illuminance value (e.g., first illuminance value) obtained based on the pixel value of the image obtained through the camera module (180) satisfies a preset standard (e.g., first standard). For example, the electronic device (101) can set the switching frequency of the power converter (210) to a high frequency greater than a preset reference value (e.g., 2 MHz) based on confirming that noise occurs in the image obtained through the camera module (180) when the surrounding environment of the electronic device (101) is a low-light environment, and there is no limit to the size of the reference value.

[0049] FIG. 5a is a flowchart for explaining a method of operation of an electronic device according to various embodiments. FIG. 5b is a flowchart for explaining a method of operation of an electronic device according to various embodiments. With reference to FIG. 5a and FIG. 5b, an operation of an electronic device (101) confirming that noise occurs in an image acquired through a camera module (180) will be explained.

[0050] Referring to FIG. 5a, in operation 501, according to various embodiments, an electronic device (101) (e.g., processor (120)) can view a first image using a camera module (180) while the switching frequency of the power converter (210) is at a first frequency (e.g., low frequency). An image (e.g., a first image) viewed using the camera module (180) while the switching frequency of the power converter (210) is at a low frequency (e.g., first frequency) can be referred to as a low frequency image.

[0051] In operation 503, according to various embodiments, the electronic device (101) can view a second image using the camera module (180) while the switching frequency of the power converter (210) is a second frequency (e.g., a high frequency). The image (e.g., a second image) viewed using the camera module (180) while the switching frequency of the power converter (210) is a high frequency (e.g., a second frequency) may be referred to as a high-frequency image.

[0052] In operation 505, according to various embodiments, the electronic device (101) can determine whether noise occurs in the image acquired through the camera module (180) while the switching frequency is a first frequency (e.g., low frequency) based on a comparison result between at least a portion of a first image (e.g., low frequency image) and at least a portion of a second image (e.g., high frequency image). According to one embodiment, the electronic device (101) can use a comparison result between the entire first image (e.g., low frequency image) and the entire second image (e.g., high frequency image). For example, the electronic device (101) can determine whether noise occurs in the image acquired through the camera module (180) while the switching frequency is a first frequency (e.g., low frequency) based on a comparison result between the entire first image (e.g., low frequency image) and the entire second image (e.g., high frequency image). According to another embodiment, the electronic device (101) may use a comparison result between a region of a first image (e.g., a low-frequency image) (e.g., a first region) and a region of a second image (e.g., a high-frequency image) (e.g., a second region).

[0053] Referring to FIG. 5b, a method for determining whether noise occurs in an image acquired through a camera module (180) while the switching frequency is a first frequency (e.g., low frequency) based on a comparison result between at least a portion of a first image (e.g., low frequency image) and at least a portion of a second image (e.g., high frequency image) is described in detail.

[0054] Referring to FIG. 5b, in operation 507, according to one embodiment, an electronic device (101) (e.g., processor (120)) can identify an area (e.g., a first area) that satisfies a preset criterion (e.g., a second criterion) among a plurality of areas of a first image (e.g., a low-frequency image). Or, according to another embodiment, the electronic device (101) can identify an area (e.g., a second area) that satisfies a preset criterion (e.g., a second criterion) among a plurality of areas of a second image (e.g., a high-frequency image). A preset criterion (e.g., a second criterion) for identifying one area (e.g., a first area (or a second area)) among a plurality of areas of the first image (or the second image) will be described later.

[0055] In operation 509, according to various embodiments, the electronic device (101) can check the pixel value. The pixel value (e.g., an Analog to Digital Converter (ADC) value) may mean a value obtained by converting the amount of light received by a photodiode corresponding to the pixel into a voltage. Checking the pixel value of an image (or the pixel value of a specific area of ​​an image) may mean checking the pixel value of each of the pixels included in the image (or a specific area of ​​an image). For example, the electronic device (101) may check the pixel value of a first area (e.g., a first pixel value) that satisfies a preset criterion (e.g., a second criterion) among a plurality of areas of a first image, and check the pixel value of a second area (e.g., a second pixel value) that corresponds to the first area of ​​the first image among a plurality of areas of a second image. In another example, the electronic device (101) may check the pixel value (e.g., second pixel value) of a second area that satisfies a preset standard (e.g., second standard) among a plurality of areas of a second image, and may check the pixel value (e.g., first pixel value) of a first area corresponding to the second area of ​​the second image among a plurality of areas of a first image. Or, in another example, the electronic device (101) may check the pixel value (e.g., first pixel value) of a first area that satisfies a preset standard (e.g., second standard) among a plurality of areas of a first image, and may check the pixel value (e.g., second pixel value) of a second area that satisfies a preset standard (e.g., second standard) among a plurality of areas of a second image.

[0056] In operation 511, according to various embodiments, the electronic device (101) can determine that the difference between a first pixel value of a first region of a first image (e.g., a low-frequency image) and a second pixel value of a second region of a second image (e.g., a high-frequency image) satisfies a preset criterion (e.g., a third criterion). For example, the electronic device (101) can determine that the preset criterion (e.g., a third criterion) is satisfied based on the sum of the differences between the first pixel value and the second pixel value exceeding a preset criterion value. This is exemplary, and the preset criterion (e.g., a third criterion) which serves as the criterion for determining the difference between the first pixel value and the second pixel value will be described later. The difference between the first pixel value and the second pixel value may mean the difference between the pixel value of at least one pixel of the first region and the pixel value of at least one pixel of the second region corresponding to at least one pixel of the first region. For example, if the first region and the second region each contain multiple pixels, the difference between the first pixel value and the second pixel value may exist as many times as the number of pixels.

[0057] 513 In operation, according to various embodiments, the electronic device (101) may determine that noise occurs in the image obtained through the camera module (180) based on the difference between the first pixel value and the second pixel value satisfying a preset criterion (e.g., a third criterion).

[0058] FIG. 6 is a flowchart for explaining a method of operation of an electronic device according to various embodiments. With reference to FIG. 6, a preset criterion (e.g., a second criterion) for identifying one region (e.g., a first region or a second region) among a plurality of regions of a specific image (e.g., a first image (e.g., a low-frequency image) or a second image (e.g., a high-frequency image)) is described. FIG. 6 is described with reference to FIG. 7. FIG. 7 is a diagram for explaining the operation of an electronic device according to various embodiments.

[0059] Referring to FIG. 6, in operation 601, according to various embodiments, an electronic device (101) (e.g., processor (120)) can check the average brightness of multiple regions of a specific image (e.g., a first image (e.g., a low-frequency image) or a second image (e.g., a high-frequency image)). For example, the electronic device (101) can check the average brightness of multiple regions for at least one of the first image (e.g., a low-frequency image) or the second image (e.g., a high-frequency image). Since the operation of the electronic device (101) checking the average brightness of multiple regions of the first image (e.g., a low-frequency image) and the operation of checking the average brightness of multiple regions of the second image (e.g., a high-frequency image) are similar, the operation of checking the average brightness of multiple regions of the first image (e.g., a low-frequency image) will be described to avoid redundancy in description. According to one embodiment, the electronic device (101) can sum the pixel values ​​of pixels included in a plurality of regions of a first image (e.g., a low-frequency image) in units of a plurality of regions. For example, the electronic device (101) can determine the average brightness of a first region by checking a first sum value (or a value obtained by dividing the first sum value by the number of pixels in the first region) which is the sum of the pixel values ​​of the pixels in a first region of the first image, and can perform the same operation for the remaining regions.

[0060] The method by which the electronic device (101) determines the average brightness of multiple regions of an image is exemplary and is not limited thereto.

[0061] In operation 603, according to various embodiments, the electronic device (101) may identify the region with the lowest average brightness among a plurality of regions of a specific image (e.g., a first image (e.g., a low-frequency image) or a second image (e.g., a high-frequency image)) as a region that satisfies a preset criterion (e.g., a second criterion). For example, the electronic device (101) may identify the first region with the lowest average brightness among a plurality of regions of the first image (e.g., a low-frequency image) as a region that satisfies a preset criterion (e.g., a second criterion), and among a plurality of regions of the second image (e.g., a high-frequency image)), identify a second region corresponding to the first region of the first image. In another example, the electronic device (101) may identify a second area with the lowest average brightness among a plurality of areas of a second image (e.g., a high-frequency image) as an area that satisfies a preset standard (e.g., a second standard), and identify a first area corresponding to the second area of ​​the second image among a plurality of areas of a first image (e.g., a low-frequency image). Or, in another example, the electronic device (101) may identify a first area with the lowest average brightness among a plurality of areas of a first image (e.g., a low-frequency image) as an area that satisfies a preset standard (e.g., a second standard), and identify a second area with the lowest average brightness among a plurality of areas of a second image (e.g., a high-frequency image) as an area that satisfies a preset standard (e.g., a second standard).

[0062] For example, referring to FIG. 7, the electronic device (101) can check the average brightness of a plurality of regions (e.g., a first region (710), a second region (720), a third region (730), and a fourth region (740)) of a specific image (700) (e.g., a low-light image), and identify the third region (730), which has the lowest average brightness among the plurality of regions, as a region that meets a preset standard (e.g., a second standard).

[0063] According to one embodiment, a plurality of regions of a specific image (700) may include a predetermined number of regions divided according to a predetermined layout. For example, as shown in FIG. 7, a plurality of regions (710, 720, 730, and 740) of a specific image (700) may have four regions defined according to a predetermined layout divided in all directions. Alternatively, as another example, although not illustrated, a plurality of regions of a specific image may include a predetermined number (e.g., four) of regions evenly distributed vertically (or horizontally), and there are no limitations on the layout of the plurality of regions of the specific image.

[0064] FIG. 8 is a flowchart for explaining the operation of an electronic device according to various embodiments. With reference to FIG. 8, the operation of the electronic device (101) confirming that noise occurs in an image acquired through a camera module (180) will be explained. FIG. 8 will be explained with reference to FIG. 9. FIG. 9 is a diagram for explaining the operation of an electronic device according to various embodiments.

[0065] Referring to FIG. 8, in operation 801, according to various embodiments, an electronic device (101) (e.g., processor (120)) can determine the difference between a first pixel value of a first region of a first image (e.g., low-frequency image) and a second pixel value of a second region of a second image (e.g., high-frequency image). For example, referring to FIG. 9, the electronic device (101) can determine the difference between a first pixel value of a first region of a first image (910) and a second pixel value of a second region of a second image (920). As described above, the first pixel value and the second pixel value may each mean a pixel value equal to the number of pixels included in the first region and the second region.

[0066] In operation 803, according to various embodiments, the electronic device (101) can identify a plurality of pixel groups, which are sets of pixels where the difference between a first pixel value and a second pixel value is greater than or equal to a reference value (e.g., a second reference value). For example, referring to FIG. 9, the electronic device (101) can identify the difference (930) between a first pixel value and a second pixel value, and can identify a plurality of pixel groups (e.g., a plurality of vertical lines disclosed in 930), which are sets of pixels where the difference between the first pixel value and the second pixel value is greater than or equal to a reference value (e.g., a second reference value) (e.g., pixels forming a single vertical line (or area) in 930).

[0067] In operation 805, according to various embodiments, the electronic device (101) can confirm that the spacing between the plurality of pixel groups identified in operation 803 is substantially the same. For example, the electronic device (101) can confirm that the first spacing between the first group and the second group among the plurality of pixel groups is substantially the same as the second spacing between the second group and the third group (or the third spacing between the third group and the fourth group). For example, referring to FIG. 9, the electronic device (101) can confirm that the spacing between the plurality of vertical lines disclosed in 930 is substantially the same. According to one embodiment, the electronic device (101) can determine that the difference between the first pixel value of a first region of a first image (e.g., low-frequency image) and the second pixel value of a second region of a second image (e.g., high-frequency image) satisfies a preset criterion (e.g., a third criterion) based on the fact that the spacing between a plurality of pixel groups identified in the 803 operation is substantially the same.

[0068] In operation 807, according to various embodiments, the electronic device (101) may determine that noise is occurring in the image obtained through the camera module (180) based on confirming that the spacing between a plurality of pixel groups is substantially the same in operation 805.

[0069] According to another embodiment, although not illustrated, the electronic device (101) may determine that noise occurs in the image obtained through the camera module (180) based on the sum of the differences between the first pixel value and the second pixel value exceeding a preset reference value.

[0070] FIG. 10 is a flowchart illustrating a method of operation of an electronic device according to various embodiments.

[0071] Referring to FIG. 10, in operation 1001, according to various embodiments, an electronic device (101) (e.g., processor (120)) can check an illuminance value (e.g., a second illuminance value) around the electronic device (101) and check that the illuminance value (e.g., a second illuminance value) around the electronic device (101) satisfies a preset standard (e.g., a fourth standard). For example, the electronic device (101) can check an illuminance value (e.g., a second illuminance value) obtained using an illuminance sensor (220). For another example, the electronic device (101) can check an illuminance value (e.g., a second illuminance value) around the electronic device (101) based on pixel values ​​of an image obtained through a camera module (180). For example, the electronic device (101) may determine that the second illuminance value satisfies a preset standard (e.g., a fourth standard) based on the fact that the second illuminance value obtained using an illuminance sensor (220) or the second illuminance value obtained through a camera module (180) is greater than or equal to a preset standard value (e.g., 60 Lux) when the switching frequency of the power converter (210) is high frequency (e.g., a second frequency). In another example, the electronic device (101) may determine that the second illuminance value satisfies a preset standard (e.g., a fourth standard) based on the fact that the second illuminance value, which is confirmed based on the second illuminance value obtained using an illuminance sensor (220) or the pixel value of an image obtained through a camera module (180) while the switching frequency of the power converter (210) is high frequency (e.g., a second frequency), is maintained at a state of being greater than or equal to a preset standard value (e.g., 60 Lux) for a preset second time (e.g., 3 seconds).According to one embodiment, the electronic device (101) may determine that the surrounding environment of the electronic device (101) is a high-illumination environment based on whether an illuminance value obtained using an illuminance sensor (220) (e.g., a second illuminance value) or an illuminance value confirmed based on a pixel value of an image obtained through a camera module (180) (e.g., a second illuminance value) satisfies a preset standard (e.g., a fourth standard).

[0072] In operation 1003, according to various embodiments, the electronic device (101) may set the switching frequency of the power converter (210) to a first frequency (e.g., low frequency) that is different from the second frequency (e.g., high frequency) (e.g., having a frequency lower than the frequency of the second frequency) based on the fact that the illuminance value (e.g., second illuminance value) obtained using the illuminance sensor (220) or the illuminance value (e.g., second illuminance value) identified based on the pixel value of an image obtained through the camera module (180) satisfies a preset standard (e.g., fourth standard). For example, the electronic device (101) may set the switching frequency of the power converter (210) to a low frequency that is less than or equal to a preset standard value (e.g., 100 kHz) based on the fact that the surrounding environment of the electronic device (101) is a high illuminance environment, and there is no limit to the magnitude of the standard value.

[0073] FIG. 11 is a flowchart illustrating a method of operation of an electronic device according to various embodiments.

[0074] Referring to FIG. 11, in operation 1101, according to various embodiments, an electronic device (101) (e.g., a processor (120)) can operate a camera module (180).

[0075] In operation 1103, according to various embodiments, the electronic device (101) can set the switching frequency of the power converter (210) that transmits the changed power to the camera module (180) to a low frequency (e.g., 100 kHz or less).

[0076] In operation 1105, according to various embodiments, the electronic device (101) can determine whether the surrounding environment of the electronic device (101) is a low-light environment. The electronic device (101) can perform operation 1107 based on whether the surrounding environment is a low-light environment, and can perform operation 1103 based on whether the surrounding environment is not a low-light environment.

[0077] In operation 1107, according to various embodiments, the electronic device (101) may determine whether noise occurs in an image acquired through the camera module (180) based on whether the surrounding environment of the electronic device (101) is a low-light environment. The electronic device (101) may perform operation 1109 based on whether noise occurs, and may perform operation 1103 based on whether noise does not occur. According to another embodiment, the electronic device (101) may omit operation 1107. If operation 1107 is omitted, the electronic device (101) may perform operation 1109 after operation 1105.

[0078] In operation 1109, according to various embodiments, the electronic device (101) may set the switching frequency of the power converter (210) to a high frequency. For example, the electronic device (101) may set the switching frequency of the power converter (210) to a high frequency based on the fact that the surrounding environment of the electronic device (101) is a low-light environment and noise occurs in the image obtained through the camera module (180). In another example, the electronic device (101) may set the switching frequency of the power converter (210) to a high frequency based on the fact that the surrounding environment of the electronic device (101) is a low-light environment.

[0079] In operation 1111, according to various embodiments, the electronic device (101) can determine whether the surrounding environment of the electronic device (101) is a high-illumination environment. The electronic device (101) can perform operation 1103 based on whether the surrounding environment is a high-illumination environment, and can perform operation 1109 based on whether the surrounding environment is not a high-illumination environment. In one example, the threshold value for illuminance set to determine whether it is low-illumination in operation 1105 and the threshold value for illuminance set to determine whether it is high-illumination in operation 1111 may be the same. Or, in another example, the threshold value for illuminance set to determine whether it is high-illumination may be set to be greater than the threshold value for illuminance set to determine whether it is low-illumination, in which case the switching frequency may be changed according to hysteresis characteristics.

[0080] Those skilled in the art will understand that the various embodiments described in this specification can be applied organically to one another within the applicable scope.

[0081] According to various embodiments, the electronic device (101) includes a power converter (210); a camera module (180); and a processor (120), and the processor may be configured to check a first illuminance value around the electronic device while the switching frequency of the power converter delivering power to the camera module is a first frequency, determine whether the first illuminance value satisfies a first criterion, and, based on the fact that the first illuminance value satisfies the first criterion, set the switching frequency of the power converter to a second frequency different from the first frequency.

[0082] According to various embodiments, the processor may be configured to determine that the first illuminance value satisfies the first standard based on the fact that the first illuminance value is less than or equal to the first standard value.

[0083] According to various embodiments, the processor may be configured to determine that the first illuminance value satisfies the first standard based on the fact that the state in which the first illuminance value is less than or equal to the first standard value is maintained for a first time.

[0084] According to various embodiments, the processor may be configured to set the switching frequency of the power converter to the second frequency higher than the first frequency, based on the fact that the first illuminance value satisfies the first criterion and noise occurs in the image obtained through the camera module.

[0085] According to various embodiments, the processor may be configured to check a first image using the camera module while the switching frequency of the power converter is the first frequency, check a second image using the camera module while the switching frequency of the power converter is the second frequency, and determine whether noise occurs in the image acquired through the camera module while the switching frequency is the first frequency based on a comparison result between at least a portion of the first image and at least a portion of the second image.

[0086] According to various embodiments, the processor may be configured to determine, as at least part of an operation of determining whether noise occurs based on the comparison result, identify a first area among a plurality of areas of the first image that satisfies a second criterion, identify a first pixel value of the first area of ​​the first image and a second pixel value of a second area among a plurality of areas of the second image that corresponds to the first area of ​​the first image, determine whether the difference between the first pixel value and the second pixel value satisfies a third criterion, and determine that noise occurs in the image obtained through the camera module based on the difference satisfying the third criterion.

[0087] According to various embodiments, the processor may be configured to identify the area with the lowest average brightness among the plurality of areas of the first image as the first area that satisfies the second criterion.

[0088] According to various embodiments, the plurality of regions of the first image may include a predetermined number of regions divided according to a preset layout.

[0089] According to various embodiments, the processor may be configured to identify a plurality of pixel groups, which are sets of pixels where the difference between the first pixel value and the second pixel value is greater than or equal to a second reference value, and to determine that the difference satisfies the third reference based on the fact that the intervals between the plurality of pixel groups are substantially the same.

[0090] According to various embodiments, the processor may be configured to check a second illuminance value around the electronic device, determine whether the second illuminance value satisfies a fourth criterion, and, based on whether the second illuminance value satisfies the fourth criterion, set the switching frequency to the first frequency.

[0091] According to various embodiments, the processor may be configured to determine that the second illuminance value satisfies the fourth criterion based on the fact that the state in which the second illuminance value is less than or equal to the third criterion value is maintained for a second period of time.

[0092] According to various embodiments, the electronic device further includes an illuminance sensor, and the processor may be configured to check the first illuminance value obtained using the illuminance sensor.

[0093] According to various embodiments, the processor may be configured to check the first illuminance value based on the pixel value of an image obtained through the camera module.

[0094] According to various embodiments, a method of operating an electronic device (101) may include: checking a first illuminance value around the electronic device while the switching frequency of the power converter (210) of the electronic device that delivers power to the camera module (180) of the electronic device is at a first frequency, and determining whether the first illuminance value satisfies a first criterion; and setting the switching frequency of the power converter to a second frequency different from the first frequency based on the fact that the first illuminance value satisfies the first criterion.

[0095] According to various embodiments, the operation of determining whether the first illuminance value satisfies the first criterion may include the operation of determining that the first illuminance value satisfies the first criterion based on the fact that the state in which the first illuminance value is less than or equal to the first criterion value is maintained for a first time.

[0096] According to various embodiments, the operation of setting the switching frequency of the power converter to the second frequency different from the first frequency may include setting the switching frequency of the power converter to the second frequency higher than the first frequency based on the fact that the first illuminance value satisfies the first criterion and noise occurs in the image obtained through the camera module.

[0097] According to various embodiments, the operation method may further include: an operation of checking a first image using the camera module while the switching frequency of the power converter is the first frequency; an operation of checking a second image using the camera module while the switching frequency of the power converter is the second frequency; and an operation of determining whether noise occurs in an image acquired through the camera module while the switching frequency is the first frequency, based on a comparison result between at least a portion of the first image and at least a portion of the second image.

[0098] According to various embodiments, the operation of determining whether noise occurs based on the comparison result may include: a first area satisfying a second criterion among a plurality of areas of the first image; a first pixel value of the first area of ​​the first image, and a second pixel value of a second area corresponding to the first area of ​​the first image among a plurality of areas of the second image; a operation of determining whether the difference between the first pixel value and the second pixel value satisfies a third criterion; and a operation of determining that noise occurs in the image obtained through the camera module based on the difference satisfying the third criterion.

[0099] According to various embodiments, the operation of identifying the first region satisfying the second criterion among the plurality of regions of the first image may include identifying the region with the lowest average brightness among the plurality of regions of the first image as the first region satisfying the second criterion.

[0100] According to various embodiments, the operation of determining whether the difference between the first pixel value and the second pixel value satisfies the third criterion may include: the operation of identifying a plurality of pixel groups, which are sets of pixels where the difference between the first pixel value and the second pixel value is greater than or equal to a second criterion value; and the operation of determining that the difference satisfies the third criterion based on the fact that the intervals between the plurality of pixel groups are substantially the same.

[0101] The electronic device according to the various embodiments disclosed in this document may be of various forms. The electronic device may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a consumer electronics device. The electronic device according to the embodiments of this document is not limited to the devices described above.

[0102] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of said items unless the relevant context clearly indicates otherwise. In this document, phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B or C," "at least one of A, B and C," and "at least one of A, B, or C" may each include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish said components from other said components and do not limit said components in any other aspect (e.g., importance or order). Where any (e.g., 1st) component is referred to as “coupled” or “connected” to another (e.g., 2nd) component, with or without the terms “functionally” or “communicationly,” it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0103] The term “module” as used in the various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit, for example. A module may be a component formed integrally, or a minimum unit of said component or a part thereof that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0104] Various embodiments of the present document may be implemented as software (e.g., program (140)) comprising one or more instructions stored in a storage medium (e.g., internal memory (136) or external memory (138)) readable by a machine (e.g., electronic device (101)). For example, a processor (e.g., processor (120)) of the machine (e.g., electronic device (101)) may call at least one of the one or more instructions stored in the storage medium and execute it. This enables the machine to be operated to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. The storage medium readable by the machine may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' simply means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily.

[0105] According to one embodiment, the method according to the various embodiments disclosed herein may be provided by being included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)) or an application store (e.g., Play Store). TM It can be distributed online (e.g., downloaded or uploaded) through ) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created on a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0106] According to various embodiments, each component (e.g., module or program) of the components described above may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to various embodiments, one or more of the components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the corresponding component among the multiple components prior to integration. According to various embodiments, operations performed by the module, program, or other components may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

Claim 1 An electronic device comprising: a power converter; a camera module; at least one processor; and a memory for storing instructions, wherein, when the instructions are executed individually or collectively by the at least one processor, the electronic device causes the electronic device to check a first illuminance value around the electronic device while the switching frequency of the power converter delivering power to the camera module is a first frequency, determine whether the first illuminance value satisfies a first criterion based on the condition that the first illuminance value is less than or equal to a first criterion value for a first time period, and set the switching frequency of the power converter to a second frequency different from the first frequency based on the condition that the first illuminance value satisfies the first criterion. Claim 2 delete Claim 3 delete Claim 4 An electronic device according to claim 1, wherein the instructions, when executed individually or collectively by the at least one processor, cause the electronic device to set the switching frequency of the power converter to the second frequency higher than the first frequency based on the first illuminance value satisfying the first criterion and noise occurring in the image acquired through the camera module. Claim 5 An electronic device according to claim 4, wherein, when the instructions are executed individually or collectively by the at least one processor, the electronic device causes the electronic device to check a first image using the camera module while the switching frequency of the power converter is the first frequency, check a second image using the camera module while the switching frequency of the power converter is the second frequency, and determine whether noise occurs in the image acquired through the camera module while the switching frequency is the first frequency based on the result of comparison between at least a portion of the first image and at least a portion of the second image. Claim 6 An electronic device according to claim 5, wherein, when the instructions are executed individually or collectively by the at least one processor, the electronic device identifies, as at least part of an operation of determining whether noise occurs based on the comparison result, a first region among a plurality of regions of the first image that satisfies a second criterion, a first pixel value of the first region of the first image, and a second pixel value of a second region among a plurality of regions of the second image that corresponds to the first region of the first image, determines whether the difference between the first pixel value and the second pixel value satisfies a third criterion, and determines that noise occurs in the image acquired through the camera module based on the difference satisfying the third criterion. Claim 7 An electronic device according to claim 6, wherein, when the instructions are executed individually or collectively by the at least one processor, the electronic device identifies the region with the lowest average brightness among the plurality of regions of the first image as the first region satisfying the second criterion. Claim 8 An electronic device according to claim 7, wherein the plurality of regions of the first image comprises a preset number of regions divided according to a preset layout. Claim 9 An electronic device according to claim 6, wherein, when the instructions are executed individually or collectively by the at least one processor, the electronic device identifies a plurality of pixel groups, which are sets of pixels in which the difference between the first pixel value and the second pixel value is greater than or equal to a second reference value, and determines that the difference satisfies the third reference based on the fact that the intervals between the plurality of pixel groups are substantially the same. Claim 10 An electronic device according to claim 1, wherein, when the instructions are executed individually or collectively by the at least one processor, the electronic device causes the electronic device to check a second illuminance value around the electronic device, determine whether the second illuminance value satisfies a fourth criterion, and set the switching frequency to the first frequency based on the fact that the second illuminance value satisfies the fourth criterion. Claim 11 An electronic device according to claim 10, wherein the instructions, when executed individually or collectively by the at least one processor, cause the electronic device to determine that the second illuminance value satisfies the fourth criterion based on the fact that the state in which the second illuminance value is less than or equal to the third reference value is maintained for a second time. Claim 12 An electronic device according to claim 1, further comprising an illuminance sensor, wherein the instructions, when executed individually or collectively by the at least one processor, cause the electronic device to verify the first illuminance value obtained using the illuminance sensor. Claim 13 An electronic device according to claim 1, wherein the instructions, when executed individually or collectively by the at least one processor, cause the electronic device to determine the first illuminance value based on the pixel value of an image acquired through the camera module. Claim 14 A method of operating an electronic device, comprising: an operation of checking a first illuminance value around the electronic device while the switching frequency of the power converter of the electronic device, which transmits power to a camera module of the electronic device, is a first frequency; an operation of determining whether the first illuminance value satisfies a first standard based on the fact that the state in which the first illuminance value is less than or equal to a first standard value is maintained for a first time; and an operation of setting the switching frequency of the power converter to a second frequency different from the first frequency based on the fact that the first illuminance value satisfies the first standard. Claim 15 delete Claim 16 In claim 14, the operation of setting the switching frequency of the power converter to the second frequency different from the first frequency includes the operation of setting the switching frequency of the power converter to the second frequency higher than the first frequency based on the fact that the first illuminance value satisfies the first criterion and noise occurs in the image acquired through the camera module. Claim 17 A method according to claim 16, further comprising: an operation of verifying a first image using the camera module while the switching frequency of the power converter is the first frequency; an operation of verifying a second image using the camera module while the switching frequency of the power converter is the second frequency; and an operation of determining whether noise occurs in an image obtained through the camera module while the switching frequency is the first frequency, based on a comparison result between at least a portion of the first image and at least a portion of the second image. Claim 18 In claim 17, the operation of determining whether noise occurs based on the comparison result comprises: a first area satisfying a second criterion among a plurality of areas of the first image; a first pixel value of the first area of ​​the first image and a second pixel value of a second area corresponding to the first area of ​​the first image among a plurality of areas of the second image; a operation of determining whether the difference between the first pixel value and the second pixel value satisfies a third criterion; and a operation of determining that noise occurs in the image obtained through the camera module based on the difference satisfying the third criterion. Claim 19 In claim 18, the operation of identifying the first region satisfying the second criterion among the plurality of regions of the first image includes identifying the region with the lowest average brightness among the plurality of regions of the first image as the first region satisfying the second criterion. Claim 20 In claim 18, the operation of determining whether the difference between the first pixel value and the second pixel value satisfies the third criterion comprises: the operation of identifying a plurality of pixel groups, which are sets of pixels where the difference between the first pixel value and the second pixel value is greater than or equal to a second criterion value; and the operation of determining that the difference satisfies the third criterion based on the fact that the intervals between the plurality of pixel groups are substantially the same.

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