Shooting method, shooting device and readable storage medium for preventing moiré

Abstract

The present application discloses a shooting method, shooting device, and readable storage medium for preventing moiré patterns. The shooting method includes: measuring the distance between the focal plane of a camera and a display screen; obtaining the distance value and obtaining a depth of field range within which the camera is clearly focused; determining whether the distance value falls within or approaches the depth of field range; and outputting a warning message when it is determined that the distance value falls within or approaches the depth of field range. In this way, during the process of virtual production using the shooting device, the shooting personnel can promptly intervene in the warning message, thereby enabling timely adjustment of the camera's aperture, focal length, and focal length, thereby preventing the occurrence of moiré patterns in the images captured by the camera. This not only improves shooting efficiency and quality, but also reduces shooting costs.

Description

Technical Field

[0001] The present application relates to the field of virtual production technology, and in particular to a shooting method, shooting device and readable storage medium for preventing moiré. Background Art

[0002] Existing virtual production technologies often use LED walls to create virtual background environments. Actors perform in front of the LED wall, and cameras capture both the actors and the background. However, due to the regular arrangement of the three primary color filters on the surface of the camera's digital photosensitive element (CMOS), moiré patterns appear when shooting objects with similar spatial frequencies, such as LED walls. A common solution to this problem is for the photographer to intentionally defocus the LED wall during filming. However, in actual filming, it is often difficult for photographers to detect moiré patterns in time. If moiré patterns appear in the captured footage, the footage may have to be discarded or repaired in post-production, which can easily lead to low filming efficiency, poor quality, and high costs. Summary of the Invention

[0003] In view of this, the present application provides a shooting method, a shooting device and a readable storage medium for preventing moiré patterns, so as to solve the problems of low shooting efficiency, poor shooting quality and high shooting cost.

[0004] In a first aspect, an embodiment of the present application provides a photographing method for preventing moiré patterns, the photographing method comprising the following steps:

[0005] Measure the distance between the camera's focal plane and the display screen;

[0006] Obtaining the distance value and the depth of field range within which the camera is in clear focus;

[0007] Determining whether the distance value falls within or is close to the depth of field range;

[0008] When it is determined that the distance value falls into or is close to the depth of field range, a warning prompt message is output.

[0009] In some embodiments, the warning prompt information includes first warning prompt information and second warning prompt information, wherein the first warning prompt information is different from the second warning prompt information, and outputting the warning prompt information includes:

[0010] When it is determined that the distance value falls within the depth of field range, outputting the first warning prompt information;

[0011] When it is determined that the distance value and the boundary value of the depth of field range meet a preset condition, the second warning prompt information is output.

[0012] In some embodiments, the warning prompt information further includes third warning prompt information, and the third warning prompt information is different from the first warning prompt information and the second warning prompt information. The shooting method further includes:

[0013] After the warning prompt information is output for a preset time, determining whether the depth of field range or the distance value changes;

[0014] If so, returning the distance value between the focal plane of the camera performing the measurement and the display screen;

[0015] If not, the third warning prompt information is output.

[0016] In some embodiments, the warning prompt information includes at least one of a first prompt information and a second prompt information, the first prompt information includes at least one of sound, vibration, light, text and graphics, and the second prompt information includes at least one of the distance value and the depth of field range.

[0017] In some embodiments, the shooting method further includes:

[0018] Controlling the display of a shooting parameter interface, wherein the shooting parameter interface includes a focus display area;

[0019] Displaying a first mark corresponding to the depth of field range and a second mark corresponding to the distance value in the focus display area;

[0020] When it is determined that the distance value falls within the depth of field range, the second marker is highlighted or displayed.

[0021] In some embodiments, the shooting method further includes:

[0022] Obtaining the size, aperture, focal length and focal length of the digital photosensitive element of the camera, and obtaining the pixel pitch of the display screen;

[0023] Determining a target value of the moiré pattern corresponding to the depth of field range according to the size of the digital photosensitive element, the aperture, the focal length, the focal length, and the pixel pitch;

[0024] Controlling display of a third marker corresponding to the target value in the focus display area.

[0025] In some embodiments, the shooting method further includes:

[0026] obtaining the curvature of the display screen;

[0027] acquiring, according to the curvature, a correction offset between a focal plane of the display screen and a correction focal plane of the display screen;

[0028] Obtaining a correction distance value between the focal plane of the camera and the correction focal plane of the display screen according to the correction offset and the distance value;

[0029] When it is determined that the corrected distance value falls into or is close to the depth of field range, the alarm level of the early warning prompt information is adjusted.

[0030] In some embodiments, the shooting method further includes: when it is determined that the distance value falls within the depth of field range, the distance value and the depth of field range control the adjustment of at least one parameter among the aperture, the focal length and the focal length; or, the distance value and the depth of field range calculate and output the adjustment range of at least one parameter among the aperture, the focal length and the focal length.

[0031] In a second aspect, an embodiment of the present application provides a photographing device for preventing moiré patterns, comprising:

[0032] A camera, used to capture a photographic object, wherein the photographic object includes a subject being photographed and a display screen for displaying a background image;

[0033] a distance sensor, configured to measure the distance between the focal plane of the camera and the display screen; and

[0034] A controller is used to obtain the depth of field range in which the camera is in clear focus and the distance value, determine whether the distance value falls into or is close to the depth of field range, and output a warning prompt message when it is determined that the distance value falls into or is close to the depth of field range.

[0035] In a third aspect, an embodiment of the present application provides a readable storage medium, which is used to store an interactive program. When the interactive program is run by a controller, the above-mentioned shooting method for preventing moiré is executed.

[0036] The embodiments of the present application provide a shooting method, shooting device, and readable storage medium for preventing moiré patterns. The shooting method is based on measuring the distance value between the focal plane of a camera and a display screen; obtaining the distance value and obtaining a depth of field range within which the camera is clearly focused; determining whether the distance value falls within or approaches the depth of field range; and outputting a warning prompt message when it is determined that the distance value falls within or approaches the depth of field range. In this way, during the process of virtual production using the shooting device, the shooting personnel can promptly intervene in the warning prompt message, thereby being able to promptly adjust the aperture, focal length, and focal length of the camera, thereby avoiding the problem of moiré patterns in the images captured by the camera, thereby improving shooting efficiency and quality and reducing shooting costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0038] Figure 1 This is a module block diagram of a shooting device for preventing moiré provided in an embodiment of the present application.

[0039] Figure 2 2 is a schematic structural diagram of a shooting device for preventing moiré provided in an embodiment of the present application.

[0040] Figure 3 yes Figure 2 Illustration of a usage scenario of a camera device for preventing moiré.

[0041] Figure 4 yes Figure 2 Schematic diagram of the interface display of the shooting device for preventing moiré patterns.

[0042] Figure 5 yes Figure 3 Schematic diagram of the principle of the shooting device for preventing moiré patterns.

[0043] Figure 6 This is a flowchart of the shooting method provided in an embodiment of the present application.

[0044] Description of main component symbols

[0045] Camera 100

[0046] Focus display area 10

[0047] Aperture display area 20

[0048] Focus range display area 30

[0049] First logo 101

[0050] Second identifier 102

[0051] Camera 1

[0052] Housing 11

[0053] Shot 12

[0054] Distance sensor 2

[0055] Drive mechanism 3

[0056] Display 4

[0057] Controller 5

[0058] Memory 6

[0059] Display 71

[0060] Subject 72

[0061] Prompt Module 8

[0062] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0063] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0064] It is understood that the terms in the specification and claims of this application and the above-mentioned drawings are only for describing specific embodiments and are not intended to limit this application. The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. Unless the context clearly states otherwise, the singular forms "one" and "the" are also intended to include plural forms. The terms "including" and any of their variations are intended to cover non-exclusive inclusions. In addition, the present application can be implemented in a variety of different forms and is not limited to the embodiments described in this embodiment. The purpose of providing the following specific embodiments is to facilitate a clearer and more thorough understanding of the disclosure of this application, wherein words indicating directions such as up, down, left, and right are only with respect to the position of the structure shown in the corresponding drawings.

[0065] The following description is for the purpose of illustrating the general principles of the present invention and is not intended to limit the scope of the present invention. The scope of protection of the present invention shall be determined by the appended claims.

[0066] Please also refer to Figures 1 to 3 , Figure 1 FIG2 is a block diagram of a photographing device 100 for preventing moiré provided in an embodiment of the present application; Figure 2 FIG2 is a schematic structural diagram of a photographing device 100 for preventing moiré provided in an embodiment of the present application; Figure 3The figure shows a usage scenario of the shooting device 100 for preventing moiré patterns of the present application. The shooting device 100 includes a camera 1, a distance sensor 2, and a controller 5. The camera 1 is used to obtain a shooting object. The shooting object includes a subject 72 to be shot and a display screen 71 for displaying a background image. The distance sensor 2 is used to measure the distance value between the focal plane of the camera 1 and the display screen 71. The controller 5 is used to obtain the distance value and the depth of field range in which the camera 1 is clearly focused, determine whether the distance value falls within or approaches the depth of field range, and output a warning prompt message when it is determined that the distance value falls within or approaches the depth of field range. In this way, during the process of using the shooting device 100 for virtual production, the shooting personnel can intervene in the warning prompt message in a timely manner, so that the aperture, focal length and focal length of the camera 1 can be adjusted in a timely manner, thereby avoiding the problem of moiré patterns in the image captured by the camera 1, which not only improves the shooting efficiency and shooting quality, but also reduces the shooting cost.

[0067] It should be understood by those skilled in the art that Figure 1 This is only an example of the photographing device 100 and does not constitute a limitation on the photographing device 100. The photographing device 100 may include Figure 1 More or fewer components as shown, or a combination of certain components, or different components, for example, the shooting device 100 may also include a power supply, etc.

[0068] The camera 1 includes, but is not limited to, a housing 11 and a lens 12, an aperture, a shutter, a focusing device, a light metering device, etc., which are arranged on the housing 11. The shooting device 100 also includes a driving mechanism 3, which is used to drive the lens 12, the aperture, the focusing device, etc. to move relative to the housing 11 to improve the shooting effect and shooting quality of the shooting device 100. The camera 1 can be used to obtain an image of the shooting object. The subject 72 of the shooting object can be, but is not limited to, an actor, an animal, a robot, etc. In this embodiment, the display screen 71 is configured as a real-time multi-degree-of-freedom dynamic visual background wall. The display screen 71 is used to provide a virtual background for the camera 1. As can be understood, motion capture and hybrid virtual production can be used to interact with virtual characters and the real world. By capturing only motion data from the subject being filmed, such as an actor, the scene can be read from a scene library and reconstructed into an animation as needed. This allows for real-time green keying and precise compositing when using camera 1 tracking data. Furthermore, when filming actors and props in front of an LED wall, the data can be used as a preview reference for production shots. During production, the camera operator can use the LED wall to set up the scene as if photographing a real object. Actors no longer need to face a green screen to simulate the scene, as the LED wall realistically displays the scene. All images and lighting on the LED wall provide important artistic cues and enhance the realism of the image, eliminating the need to avoid color contamination caused by green overflow, as was previously the case. In this way, the combined use of camera 1 and display screen 71 not only provides technological support for enhancing the production quality and service capabilities of audiovisual works such as films, but also enables efficient acquisition of high-quality images and optimized film production. However, the use of the display screen 71 can easily cause high-frequency interference to the photosensitive element on the camera 1. When the actor is too close to the display screen 71, that is, when the distance value between the focal plane of the camera 1 and the display screen 71 falls within the depth of field range, the image captured by the shooting device 100 will cause colored high-frequency stripes, that is, moiré patterns. Therefore, the shooting device 100 of the present application outputs a warning prompt message when it identifies that the distance value between the focal plane of the camera and the display screen falls within or approaches the depth of field range, and promptly reminds the shooting personnel, thereby effectively avoiding the possibility of moiré patterns in the image captured by the shooting device 100. In this embodiment, the display screen 71 can be, but is not limited to, an LED screen, a mini LED screen, a micro LED screen, or a display screen containing other types of light-emitting diodes. The display screen 71 can be configured as a curved display wall or a flat display wall.

[0069] The distance sensor 2 is provided on the camera 1 and is used to detect the position of the display screen 71 to obtain the distance value between the focal plane of the camera 1 and the display screen 71. The distance sensor 2 is also used to provide the controller 5 with the distance value between the focal plane of the camera 1 and the display screen 71 detected by the distance sensor 2. The distance sensor 2 can transmit the detected distance value information to the controller 5 wirelessly or by wire. Specifically, the distance sensor 2 and the controller 5 can be connected via a wired communication protocol or a wireless communication protocol to enable data exchange between the distance sensor 2 and the controller 5. Wireless communication technologies include, but are not limited to, various generations of mobile communication technologies (2G, 3G, 4G, and 5G), wireless networks, Bluetooth, ZigBee, ultra-wideband (UWB), NFC, and the like.

[0070] The distance measuring sensor 2 includes, but is not limited to, a cliff sensor, an ultrasonic sensor, an infrared sensor, a magnetometer, a three-axis accelerometer, a gyroscope, an odometer, an LDS, an ultrasonic sensor, a camera, a Hall effect sensor, and the like. This embodiment does not limit the number or location of the distance measuring sensors 2. The distance measuring sensor 2 may also employ, but is not limited to, ultra-wideband ranging and positioning technology, spatial tracking and positioning technology, and other technologies to measure the distance between the focal plane of the camera 1 and the display screen 71. In other words, the distance measuring sensor 2 may also be an ultra-wideband ranging and positioning module, a spatial tracking and positioning module, and the like.

[0071] In this embodiment, the ranging sensor 2 is an ultrasonic sensor. The ranging sensor 2 is disposed on the housing 11 of the camera 1. In other embodiments, the ranging sensor 2 may include two sensors, one of which is disposed on the camera 1 and the other on the display screen 71. It is understood that the ranging sensor 2 may include more than two sensors. Because the display screen 71 is typically curved, the ranging sensor 2 preferably includes multiple sensors to improve ranging accuracy.

[0072] The display 4 is used to provide a visual display output for the shooting personnel. Specifically, the display 4 can be used to provide a visual display interface for the shooting personnel, such as but not limited to a shooting interface, a shooting parameter interface, a shooting parameter setting interface, an early warning prompt interface, etc. Specifically, the display 4 has a display function and a touch function. For example, the display 4 is a touch display, that is, a display with an input panel, so that the display 4 is used as an input and output device. In some embodiments, the display 4 may only have a display function. When it is detected that the distance value between the focal plane of the camera and the display screen falls within the depth of field range, the controller 5 can control the display 4 to display an early warning prompt information on the early warning prompt interface, wherein the early warning prompt interface can be set independently of the shooting interface or the shooting parameter interface, or can be fully or partially integrated and displayed together.

[0073] In some embodiments, the shooting device 100 further includes a prompt module 8 connected to the controller 5. The prompt module 8 is used to output early warning prompt information so that the shooting personnel can adjust the shooting parameters of the camera 1, thereby avoiding the phenomenon of moiré in the image captured by the camera 1, which not only improves the shooting efficiency and shooting quality, but also reduces the shooting cost. The prompt module 8 is, for example, but not limited to, an alarm light, an alarm speaker, etc. In this embodiment, the alarm module includes at least one of a light-emitting diode, a buzzer, a vibrator, etc., so that the prompt module 8 can be used to generate early warning prompt signals such as sound, light, and vibration. In some other embodiments, the display 4 is used to output early warning prompt information, that is, the prompt module 8 can be omitted.

[0074] The warning prompt information includes at least one of a first prompt information and a second prompt information. The first prompt information includes at least one of sound, vibration, light, text, and graphics, and the second prompt information includes at least one of the distance value and the depth of field range. When the distance between the focal plane of the camera 1 and the display screen 71 approaches or falls within the depth of field range, the prompt module 8 is triggered, thereby issuing a warning prompt information to the camera operator. The specific warning prompt information can be displayed on the display 4 or played by the prompt module 8.

[0075] The controller 5 can be used to control the coordination of various functional components within the camera 100. Specifically, the controller 5 is used to obtain the distance value and depth of field range measured by the ranging sensor 2, determine whether the distance value falls within the depth of field range, and control the display 4 and / or prompt module 8 to output a warning prompt message when it is determined that the distance value falls within the depth of field range.

[0076] In order to realize the interface and data exchange between the camera operator and the camera 100, in addition to the display 4, the camera apparatus 100 may also include an input / output module connected to the controller 5. The input / output module can be used for the camera operator to input operating instructions and output a visual display interface to the camera operator. The input / output module includes but is not limited to input devices such as a keyboard, a mouse, a touch screen, a remote control, and output devices such as a printer, a voice playback device, and a USB port. Specifically, in some embodiments, the input / output module enables the camera apparatus 100 to be connected to a computer interface, and the camera operator can input configuration parameters, etc. through the computer and the input / output module. In other embodiments, the camera operator can use the additional input of the input / output module to configure the shooting parameters, etc. In some embodiments, as mentioned above, the display 4 can also serve as an input / output module, such as a touch screen display.

[0077] The shooting device 100 may further include a communication module connected to the controller 5. The controller 5 is also used to control the communication module to send the audio-visual data captured by the camera 1 and / or the distance value collected by the ranging sensor 2 to a third-party device. The communication module may be, but is not limited to, WiFI, Bluetooth, NFC, ZigBee, ultra-wideband UWB or 2G, 3G, 4G, 5G and other mobile communication modules. Therefore, the early warning information and / or audio-visual data can be wirelessly transmitted to a third-party device through the communication module of the shooting device 100 for centralized management. In some other embodiments, the shooting device 100 may also establish a connection with a third-party device via a cable. The third-party device may be, but is not limited to, a cloud service system or a mobile terminal such as a mobile phone, tablet computer, or personal computer.

[0078] The controller 5 can be a central processing unit (CPU), other general-purpose controllers 5, digital signal processors 5 (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose controller 5 can be a microcontroller 5 or any conventional controller 5. The controller 5 is the control center of the camera 100 and connects the various components of the camera 100 using various interfaces and circuits.

[0079] The controller is also used to execute all steps of the following shooting method for preventing moiré. For example, Figure 6 Specifically, the memory 6 stores a program code, and the controller is used to call the program code 61 in the memory 6 to execute all the steps in the following shooting method for preventing moiré.

[0080] The memory 6 can also be used to store calculation rules for the depth of field range, etc. The memory 6 can be used to store computer programs and / or modules. The controller 5 realizes various functions of the shooting device 100 by running or executing the computer programs and / or modules stored in the memory 6, and calling the data stored in the memory 6. The memory 6 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, application programs required for multiple functions (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created based on the use of the mobile phone (such as audio data, a phone book, etc.). In addition, the memory 6 can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), multiple disk storage devices, flash memory devices, or other volatile solid-state storage devices.

[0081] Please also refer to Figures 1 to 6 , Figure 4 FIG. 1 is a schematic diagram of a display interface of the photographing device 100 for preventing moiré patterns. Figure 5 2 is a schematic diagram of the principle of a photographing device 100 for preventing moiré patterns; Figure 6 FIG2 is a flowchart of a method for preventing moiré patterns provided in accordance with a first embodiment of the present invention. The method described in this embodiment is applied to a moiré-preventing photographing device 100 and includes the following steps.

[0082] Step S501 : measuring the distance between the focal plane of the camera and the display screen.

[0083] Before step S501, the shooting method further includes: adjusting the position and shooting parameters of the camera 1 so that the focal plane A2 of the subject 72 of the camera 1 is parallel to the focal plane A1 of the camera 1, and the ranging sensor 2 is facing the display screen 71, thereby ensuring that the center lines of the ranging sensor 2, the subject 72 and the display screen 71 are coplanar, thereby improving the accuracy of ranging and enabling more accurate assessment of the depth of field range where moiré patterns appear.

[0084] Step S503 , obtaining the distance value and obtaining the depth of field range in which the camera 1 is in clear focus.

[0085] Obtaining the depth of field range within which the camera 1 is in focus includes calculating the depth of field range based on the size, aperture, focal length, and focal length of the digital photosensitive element of the camera 1. It is understood that the depth of field range can be obtained using existing methods for measuring the depth of field range, and this application does not impose any specific limitations thereon.

[0086] It should be noted that the "depth of field" described herein refers to the state in which, when the lens 12 of the camera 1 is focused on the subject 72, a clear image of the subject 72 is formed on the focal plane at the focal point. Furthermore, objects in front of and behind the subject 72 (i.e., at the focal point) and within a certain distance range in front of and behind the subject also form clear images on the focal plane A2 of the subject 72. In other words, the depth in front of and behind the subject 72, and the image blur on the film surface, are all within the permitted range of the circle of confusion.

[0087] Depth of field includes foreground depth of field and background depth of field. The formula for calculating depth of field satisfies the following equation: Depth of field ΔL = ΔL1 + ΔL2 = (2f^2FδL^2) / (f^4 - F^2δ^2L^2); foreground depth of field ΔL1 = FδL^2 / (f^2 + FδL); background depth of field ΔL2 = FδL^2 / (f^2 - FδL), where ΔL represents the depth of field, ΔL1 represents the foreground depth of field, ΔL2 represents the background depth of field, δ represents the diameter of the permissible circle of confusion, F represents the shooting aperture value of lens 12, f represents the focal length of the lens, and L represents the focus distance value. As can be seen from the depth of field calculation formula, depth of field is related to the aperture, focal length and focal length of lens 12, as well as the image quality requirements (expressed in the size of the permissible circle of confusion). The effects of these major factors on depth of field are as follows (assuming all other conditions remain unchanged): (1) Regarding the aperture of lens 12: the larger the aperture, i.e., the smaller the aperture value (F), the smaller the depth of field, while the smaller the aperture, i.e., the larger the aperture value (F), the larger the depth of field; (2) Regarding the focal length of lens 12: the longer the focal length, the smaller the depth of field, while the shorter the focal length, the larger the depth of field; (3) Regarding the focal length: the longer the distance value, the larger the depth of field, while the closer the distance value, the smaller the depth of field. Different manufacturers and different film sizes have different numerical definitions of the permissible circle of confusion diameter.

[0088] like Figure 3As shown, specifically, the subject 72 is an actor, and the display screen 71 is an LED wall. The distance L1 is measured between the focal plane A1 of the camera 1 and the focal plane A2 of the subject 72. The depth of field range L3 is the range of values ​​between the far point A4 and the near point A5. The distance sensor 2 is used to measure the distance L2 between the focal plane A1 of the camera 1 and the focal plane A3 of the display screen 71. The focal plane A1 of the camera 1, the focal plane A2 of the subject 72, and the focal plane A3 of the display screen 71 are parallel. For example, when the depth of field range is 7-10 feet, if the distance L2 measured by the distance sensor 2 is 8 feet, it indicates that the distance between the focal plane of the camera 1 and the display screen 71 falls within the depth of field range. If the distance L2 measured by the distance sensor 2 is 14 feet or 5 feet, it indicates that the distance between the focal plane of the camera 1 and the display screen 71 falls outside the depth of field range. When the distance L2 measured by the distance sensor 2 is near 7 feet or 10 feet, for example, 6.5 feet or 10.5 feet, it indicates that the distance between the focal plane of the camera 1 and the display screen 71 is close to the depth of field range. The above dimensions are for illustrative purposes only and do not constitute specific limitations. The depth of field range, distance value, and nearby values ​​can be determined based on factors such as the shooting scene and are not specifically limited in this application.

[0089] Step S505: Determine whether the distance value falls within or is close to the depth of field range. If so, execute step S507; if not, return to execute step S501.

[0090] When it is determined that the distance value falls within the depth of field range, it indicates that the image captured by the camera device 100 may exhibit moiré patterns, so that the photographer can adjust the aperture, focal length, and focal length of the camera device 100 in advance, thereby more effectively avoiding the occurrence of moiré patterns in the image captured by the camera device 100. It should be noted that moiré patterns are high-frequency interferences caused by the photosensitive element on the camera 1, which will cause high-frequency colored stripes to appear in the captured image. The occurrence of moiré patterns can cause problems such as low shooting efficiency, poor shooting quality, and high shooting costs. Therefore, by determining whether the distance value between the focal plane of the camera 1 and the display screen 71 falls within the depth of field range, the photographer can adjust the aperture, focal length, and focal length parameters in a timely manner to avoid the occurrence of moiré patterns, which not only simplifies calculations, but also improves shooting efficiency and quality, and reduces shooting costs.

[0091] Step S507: outputting warning information.

[0092] Among them, the warning prompt information is used to prompt the user to prevent the occurrence of moiré patterns in the image captured by the camera 1. The warning prompt information includes at least one of the first prompt information and the second prompt information. The first prompt information includes at least one of sound, vibration, light, text and graphics. The second prompt information includes at least one of the distance value and the depth of field range. In this way, after the warning prompt information is output, the shooting personnel can adjust the aperture, focal length and focal length and other parameters of the camera 1 in time to avoid the occurrence of moiré patterns, which not only simplifies the calculation, but also improves the shooting efficiency and shooting quality, and reduces the shooting cost. For example, in this embodiment, the warning prompt information can be a flashing cursor, so that the shooting personnel can understand the current shooting situation in time, thereby effectively avoiding the occurrence of moiré patterns in the image captured by the shooting device 100.

[0093] In some embodiments, the warning prompt information includes first warning prompt information and second warning prompt information, wherein the first warning prompt information is different from the second warning prompt information. Outputting the warning prompt information includes: outputting the first warning prompt information when it is determined that the distance value falls within the depth of field range; and outputting the second warning prompt information when it is determined that the distance value and the boundary value of the depth of field range meet a preset condition.

[0094] The first warning prompt information may differ from the second warning prompt information in terms of prompt type or content. For example, if both the first warning prompt information and the second warning prompt information have a prompt type of light, the light may have different colors or brightnesses. Alternatively, the prompt types may be different, such that the first warning prompt information has a prompt type of light, while the second warning prompt information has a prompt type of a combination of light, text, and graphics.

[0095] For example, when the camera 100 outputs a first warning message, indicating a high probability of moiré patterns appearing in the image captured by the camera 100 and that moiré patterns are imminent, the controller 5 controls the display 4 to output the message "Image captured by the camera 100 may soon exhibit moiré patterns" and controls the prompt device to emit an audible and visual prompt. When the camera 100 outputs a second warning message, indicating a low probability of moiré patterns appearing in the image captured by the camera 100, the controller 5 controls the display 4 to output only the message "Image captured by the camera 100 may soon exhibit moiré patterns." For another example, the controller 5 can set the background color or warning light of the warning prompt box to a color corresponding to the alarm level, or adjust the vibration frequency of the warning prompt to a corresponding vibration frequency. This allows the camera operator to adjust parameters such as the aperture, focal length, and focal length of the camera 1 based on the different warning messages, effectively preventing moiré patterns from appearing in the image captured by the camera 100. When a photographer is operating multiple cameras 100 simultaneously, they can prioritize cameras with higher warning alert levels, thereby improving the photographer's work efficiency and enhancing the photography effects and quality of the camera 100. The distance value and the boundary value of the depth of field range satisfying a preset condition refers to the distance value measured by the ranging sensor 2 being close to the boundary value of the depth of field range, that is, the proximity between the distance value and the boundary value. For example, the proximity between the distance value and the boundary value of the depth of field range satisfies a preset proximity. The preset proximity can be determined based on various factors of the shooting scene and is not specifically limited in this application.

[0096] In some embodiments, the warning prompt information further includes third warning prompt information, and the third warning prompt information is different from the first warning prompt information and the second warning prompt information. The shooting method further includes:

[0097] After the warning prompt information is output for a preset time, determining whether the depth of field range or the distance value changes;

[0098] If yes, the distance value between the focal plane of the camera 1 and the display screen 71 performing the measurement is returned;

[0099] If not, the third warning prompt information is output.

[0100] It is understood that the preset time can be user-defined or factory-set, such as, but not limited to, 10 seconds, 20 seconds, 30 seconds, or 1 minute. The numerical value of the preset time is not specifically limited in this application. If the depth of field range or the distance value changes after the preset time of the warning prompt message is output, it indicates that the photographer has adjusted the shooting parameters of the camera 100. At this time, the controller 5 will control the process to return to the step of measuring the distance value between the focal plane of the camera 1 and the display screen 71. If the depth of field range or the distance value has not changed, it indicates that the photographer may have forgotten or not seen the warning prompt message. At this time, the controller 5 will control the output of a third warning prompt message to further remind the photographer to adjust the shooting parameters of the camera 100 in a timely manner. In some embodiments, after determining that the depth of field range or the distance value has not changed, an alarm message may also be sent to an external device. The external device can be a computer, mobile phone, or other device connected to the camera 100 to prompt the photographer to adjust the shooting parameters of the camera 100 in a timely manner.

[0101] The shooting method also includes: controlling the display of a shooting parameter interface, wherein the shooting parameter interface includes a focus display area; displaying a first identifier corresponding to the depth of field range and a second identifier corresponding to the distance value in the focus display area; and highlighting or highlighting the second identifier when it is determined that the distance value falls within the depth of field range.

[0102] Specifically, if Figure 1 and Figure 4 As shown, the controller 5 controls the display 4 to display a shooting parameter interface. The shooting parameter interface includes but is not limited to a focus display area 10, an aperture display area 20, and a focal length display area 30. In this embodiment, the focus display area 10 is displayed on the far right of the shooting parameter interface. A first mark 101 corresponding to the depth of field range and a second mark 102 corresponding to the distance value are displayed in the focus display area 10, so that the shooting personnel can quickly understand the shooting parameters. When it is determined that the distance value falls within the depth of field range, the second mark 102 is highlighted or displayed, which can alert the shooting personnel to adjust the aperture, the focal length and / or the focal length in time, thereby effectively reducing the phenomenon of moiré patterns in the image captured by the camera 1, thereby improving the shooting efficiency and shooting quality, and reducing the shooting cost.

[0103] It should be noted that Figure 4 The displayed content is for illustration only and does not constitute a specific limitation. The location and display content of each display area displayed on the shooting parameter interface can be designed according to user preferences, factory default settings of the camera 1, etc., and this application does not make specific limitations.

[0104] In some embodiments, the shooting method also includes: obtaining the size, aperture, focal length and focal length of the digital photosensitive element of the camera 1, and obtaining the pixel pitch of the display screen 71; determining the target value of the moiré corresponding to the depth of field range based on the size of the digital photosensitive element, the aperture, the focal length, the focal length and the pixel pitch; and controlling the display of a third identifier corresponding to the target value in the focus display area.

[0105] Understandably, the factors that influence moiré are numerous and complex. This application, based on the size, aperture, focal length, and focal length of the digital photosensitive element, and by obtaining the pixel pitch of the display screen 71, accurately indicates the specific depth of field range within which moiré occurs. This effectively avoids the problem of moiré in images captured by the camera 1, thereby improving shooting efficiency and quality while reducing shooting costs. Understandably, the pixel pitch of the display screen 71 can be manually input by the photographer through the display screen 71 or an input / output module; alternatively, the controller 5 of the photographic device 100 can wirelessly or wiredly obtain a data packet containing the pixel pitch from the display screen 71; alternatively, the camera 1 captures tag information containing the pixel pitch of the display screen 71 and parses the tag information through the controller 5 to obtain the pixel pitch of the display screen 71.

[0106] In some embodiments, the shooting method further includes: obtaining the curvature of the display screen 71; obtaining a correction offset between the focal plane of the display screen 71 and the correction focal plane of the display screen 71 based on the curvature; obtaining a correction distance value between the focal plane of the camera 1 and the correction focal plane of the display screen 71 based on the correction offset and the distance value; and when it is determined that the correction distance value falls into or is close to the depth of field range, adjusting the alarm level of the early warning prompt information.

[0107] It can be understood that when the display screen 71 is configured as a planar display wall, the focal plane of the display screen 71 coincides with the correction focal plane of the display screen 71, that is, the value of the correction offset is 0. Figure 1 and Figure 5When the display screen 71 is configured as a curved display wall, a preset distance is provided between the focal plane A3 of the display screen 71 and the correction focal plane A6 of the display screen 71. L21 represents the correction offset between the focal plane A3 of the display screen 71 and the correction focal plane A6 of the display screen 71, L22 represents the correction distance between the focal plane A1 of the camera 1 and the correction focal plane A6 of the display screen 71, and the distance L2 is equal to the sum of the correction offset L21 and the correction distance L22. The controller 5 can calculate the correction offset between the focal plane of the display screen 71 and the correction focal plane of the display screen 71 based on the curvature of the display screen 71. The focal plane A3 of the display screen 71 refers to a tangent plane of the display screen 71 and is parallel to the correction focal plane A6 of the display screen 71 and the focal plane A1 of the camera 1.

[0108] When the controller 5 determines that the corrected distance value falls within or approaches the depth of field range, it controls the adjustment of the alarm level of the early warning prompt information. In this way, when the photographer receives the adjusted alarm prompt information output by the camera 1, he or she can quickly adjust the shooting parameters such as the aperture, the focal length, and the focal length. This not only improves the photographer's work efficiency, but also more accurately predicts the specific depth of field range where the moiré pattern will appear, further improving the shooting effect and quality of the camera 100. The alarm level of the early warning prompt information can be adjusted in the manner described above, which will not be repeated here, for example, by increasing the brightness level of the cursor, changing the shape of the cursor, increasing the vibration frequency, extending the vibration time, etc.

[0109] In some embodiments, the shooting method further includes: when it is determined that the distance value falls within the depth of field range, the distance value and the depth of field range control and adjust at least one parameter of the aperture, the focal length and the focal length.

[0110] It is understood that the controller 5 intelligently adjusts parameters such as the aperture, focal length, and focal length of the camera 1 in response to the confirmation adjustment instruction issued by the photographer to ensure that the shooting device 100 executes shooting under the control of the photographer, thereby improving the shooting effect and shooting efficiency. Specifically, the shooting method further includes: when it is determined that the distance value falls within the depth of field range, controlling the display of a confirmation dialog box for the user to confirm whether the controller 5 intelligently adjusts at least one of the parameters such as the aperture, focal length, and focal length of the camera 1 according to the intelligent adjustment instruction, thereby promptly notifying the photographer and avoiding the occurrence of shooting anomalies due to incorrect adjustment of shooting parameters.

[0111] In some other embodiments, the shooting method further includes calculating and outputting an adjustment range for at least one of the aperture, focal length, and focal length based on the distance value and the depth of field range. In this way, the photographer can manually adjust the aperture, focal length, and focal length parameters of the camera 1 based on prior knowledge or based on the adjustment ranges of the aperture, focal length, and focal length, thereby improving shooting efficiency.

[0112] An embodiment of the present invention further provides a computer storage medium, wherein the readable storage medium is used to store an interactive program, and when the program is executed, it includes some or all steps of any one of the shooting methods for preventing moiré patterns recorded in the above method embodiments.

[0113] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0114] It should be noted that for the aforementioned method embodiments, for simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present invention is not limited by the order of the actions described, because according to the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0115] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. When the above-mentioned shooting method is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc., specifically a processor in a computer device) to perform all or part of the steps of the above-mentioned shooting method in each embodiment of the present invention. Among them, the aforementioned storage medium may include: a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc., and other media that can store program code.

[0116] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A shooting method for preventing moiré patterns, characterized in that: The steps include: Measure the distance between the camera's focal plane and the display screen; Obtaining the distance value and obtaining a depth of field range of the camera that is in clear focus and corresponds to the subject being photographed; Determining whether the distance value falls within the depth of field range; When it is determined that the distance value falls within the depth of field range, outputting a warning prompt message; The shooting method further includes: Controlling the display of a shooting parameter interface, wherein the shooting parameter interface includes a focus display area; Displaying a first mark corresponding to the depth of field range and a second mark corresponding to the distance value in the focus display area; When it is determined that the distance value falls within the depth of field range, the second marker is highlighted.

2. The shooting method according to claim 1, wherein: The warning prompt information includes first warning prompt information and second warning prompt information, wherein the first warning prompt information is different from the second warning prompt information, and the outputting of the warning prompt information includes: When it is determined that the distance value falls within the depth of field range, outputting the first warning prompt information; When it is determined that the distance value and the boundary value of the depth of field range meet a preset condition, the second warning prompt information is output.

3. The shooting method according to claim 2, wherein: The warning prompt information further includes third warning prompt information, where the third warning prompt information is different from the first warning prompt information and the second warning prompt information. The shooting method further includes: After the warning prompt information is output for a preset time, determining whether the depth of field range or the distance value changes; If so, returning the distance value between the focal plane of the camera performing the measurement and the display screen; If not, the third warning prompt information is output.

4. The shooting method according to claim 1, wherein: The warning prompt information includes at least one of a first prompt information and a second prompt information, the first prompt information includes at least one of sound, vibration, light, text and graphics, and the second prompt information includes at least one of the distance value and the depth of field range.

5. The shooting method according to claim 1, wherein: The shooting method further includes: Obtaining the size, aperture, focal length and focal length of the digital photosensitive element of the camera, and obtaining the pixel pitch of the display screen; Determining a target value of the moiré pattern corresponding to the depth of field range according to the size of the digital photosensitive element, the aperture, the focal length, the focal length, and the pixel pitch; Controlling display of a third marker corresponding to the target value in the focus display area.

6. The shooting method according to claim 1, wherein: The shooting method further includes: obtaining the curvature of the display screen; acquiring, according to the curvature, a correction offset between a focal plane of the display screen and a correction focal plane of the display screen; Obtaining a correction distance value between the focal plane of the camera and the correction focal plane of the display screen according to the correction offset and the distance value; When it is determined that the corrected distance value falls within the depth of field range, the alarm level of the early warning prompt information is adjusted.

7. The shooting method according to claim 1, wherein: The shooting method also includes: when it is determined that the distance value falls within the depth of field range, controlling and adjusting at least one parameter of the camera's aperture, the camera's focal length, and the camera's focal length according to the distance value and the depth of field range; or, calculating and outputting an adjustment range of at least one parameter of the camera's aperture, the camera's focal length, and the camera's focal length according to the distance value and the depth of field range.

8. A shooting device for preventing moiré, characterized in that: include: A camera, used to capture a photographic object, wherein the photographic object includes a subject being photographed and a display screen for displaying a background image; a distance sensor, configured to measure the distance between the focal plane of the camera and the display screen; and A controller is configured to obtain a depth of field range and a distance value in which the camera is in clear focus and corresponds to the photographed subject, determine whether the distance value falls within the depth of field range, and output a warning prompt message when it is determined that the distance value falls within the depth of field range. The controller is also configured to control the display of a shooting parameter interface, wherein the shooting parameter interface includes a focus display area; a first identifier corresponding to the depth of field range and a second identifier corresponding to the distance value are displayed in the focus display area; and the second identifier is highlighted when it is determined that the distance value falls within the depth of field range.

9. A readable storage medium, characterized in that The readable storage medium is used to store an interactive program, and when the interactive program is executed by the controller, the shooting method for preventing moiré patterns according to any one of claims 1 to 7 is executed.

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