22 results about "Shutter speed" patented technology

The invention discloses an internal combustion engine in-cylinder transient self-adaptive exposure control method based on FPGA acceleration, and belongs to the technical field of internal combustion engine endoscopic visualization. In order to solve the technical problem of image overexposure or underexposure caused by violent illumination change in the combustion process in an internal combustion engine cylinder, a real-time exposure detection unit is fused with a camera built-in sensor and an endoscope added sensor to monitor light intensity data; the adaptive exposure control unit accelerated by the FPGA adopts adaptive PID control and fuzzy logic control to generate a parameter adjustment direction, the adaptive PID dynamically adjusts gain based on a machine learning model, and the fuzzy logic outputs a decision according to a fuzzy rule base of brightness, light intensity and errors; the parameter adjusting unit adjusts the aperture size, the shutter speed and the light sensitivity in a linkage mode according to the target and actual gray scale difference value, and millisecond-level multi-parameter exposure control is achieved. Overexposure of a highlight area and loss of details of a low-light area are effectively avoided, and stable and clear images are obtained in the whole combustion process.

An image capturing apparatus capable of reducing exposure variation in opposite end areas of an image when photographing is performed with flash light emission while shortening a flash synchronization time. A system controller determines a shutter speed for flash light emission photographing. The system controller selectively executes first control for controlling a traveling speed of a front curtain of a shutter and a traveling speed of a rear curtain of the shutter to the same speed, and second control for controlling the traveling speed of the front curtain to be higher than the traveling speed of the rear curtain. Before flash light emission photographing is performed, the system controller determines which of the first control and the second control is to be adopted according to the shutter speed.

An electronic device, a method and a computer program product for controlling image capturing via a first camera to capture images for use in a facial recognition process. The method includes capturing, via a first camera, a first image. The method includes determining if the first image contains a face. In response to determining the first image contains the face, the method includes identifying a skin tone frequency associated with the face. The method includes determining if the skin tone frequency is less than a skin tone frequency threshold. In response to determining the skin tone frequency is less than the skin tone frequency threshold, the method includes decreasing a first shutter speed of the first camera to a second shutter speed. The method includes capturing a second image, via the first camera using the second shutter speed. The method includes performing facial recognition based authentication using the second image.

The invention relates accessory device for photography using a smartphone (11), formed by a monobloc grip (1) comprising an electronic viewfinder (3), a main printed circuit board (12), a proximity sensor (15) and physical control elements (5-8) connected to a microcontroller (14). The device communicates with the phone (11) by means of a physical connection interface (17), eliminating the need for wireless links and guaranteeing low latency. A proprietary application (18) installed on the phone manages the automatic switching of the image between the screen and the viewfinder (3), as well as manual control of camera parameters, such as ISO, exposure, shutter speed or white balance, also allowing the execution of programmable combinations and the updating of firmware. The grip includes a hollow attachment handle (2) and means for fastening external lenses (10) by means of a metal adapter (9).

This document describes systems and techniques for object-based high-dynamic-range image capturing. In aspects, an image-capturing device can adjust an electronic shutter speed for one or more units of pixels of an image sensor based on luminous level statistical information of detected objects in a captured frame. In this way, the one or more units of pixels configured with modified electronic shutter speeds can capture incident light of a scene in a successive frame with adapted exposure for each object.

The present disclosure relates to an imaging control method, an imaging control device, and a program that make it possible to prevent imaging failures. An imaging control method according to the present disclosure includes: acquiring the movement speed of a moving body; acquiring the separation between a subject in a captured image to be captured by a camera mounted on the moving body, and the moving body; and calculating the shutter speed of the camera on the basis of the movement speed and the separation. The present disclosure can be applied to integrated circuits such as SoCs that control imaging in drones.

The present application relates to a kind of embedded PID adaptive light source control method and system based on 4K camera system AE value, the embedded PID adaptive light source control method based on 4K camera system AE value includes: receiving the current AE value and current shutter speed that 4K camera system exports in current exposure state;AE error is calculated according to current AE value, shutter speed compensation value is calculated according to current shutter speed;According to the AE error and shutter speed compensation value, calculate synthesis error;PID operation is carried out to synthesis error and anti-saturation processing is carried out when integral term is updated, and the control quantity after anti-saturation processing is obtained;According to the control quantity after anti-saturation processing, send light source brightness control signal.

An electronic device includes: a display; a camera; and a processor is configured to execute the instructions to: based on receiving a request to photograph an image using the camera in a state in which the display is driven, set a priority of the display and the camera; identify a shutter speed included in camera driving information set in the camera and an off-duty time in a duty cycle set in the display; based on the priority of the camera being set higher than the priority of the display and the shutter speed being identified to be longer than the off-duty time, adjust at least one of display driving information of the display or the camera driving information of the camera; and control to photograph an image within an off-duty time that has changed based on the adjusted at least one of the display driving information or the camera driving information.

An electronic device, a method and a computer program product for controlling image capturing via a first camera to capture images for use in a facial recognition process. The method includes capturing, via a first camera, a first image. The method includes determining if the first image contains a face. In response to determining the first image contains the face, the method includes identifying a skin tone frequency associated with the face. The method includes determining if the skin tone frequency is less than a skin tone frequency threshold. In response to determining the skin tone frequency is less than the skin tone frequency threshold, the method includes decreasing a first shutter speed of the first camera to a second shutter speed. The method includes capturing a second image, via the first camera using the second shutter speed. The method includes performing facial recognition based authentication using the second image.

The present invention provides an imaging device, a control method thereof, and a program that reduce the impact of vibrations caused by the focal-plane shutter on captured images and that can appropriately switch the shutter drive mode according to the subject's condition. [Solution] The system comprises a shooting optical system, an image sensor, a shutter speed selection means, a subject detection means, a shutter drive mode switching means for switching the shutter drive mode between a mechanical shutter mode and an electronic front curtain shutter mode, and a camera shake correction means. The shutter drive mode to be switched by the shutter drive mode switching means is determined according to the selection result of the shutter speed selection means and the detection result of the subject detection means in the shooting preparation state.

An image pickup apparatus includes an image sensor, and a processor that configured to detect a phase difference between a pair of detection signals generated by signals read out of at least a part of pixels, perform a first detection for detecting the phase difference in the first direction and a second detection for detecting the phase difference in the second direction, perform first processing for acquiring the information by the first detection or the second detection in a case where a shutter speed including a period during which the pair of detection signals are generated is longer than a predetermined time, perform second processing for acquiring the information by the first detection irrespective of the second detection in a case where the shutter speed is shorter than the predetermined time, and set the predetermined time to be longer as an F-number of the optical system is larger.

An image pickup apparatus includes an image sensor, and a processor that configured to detect a phase difference between a pair of detection signals generated by signals read out of at least a part of pixels, perform a first detection for detecting the phase difference in the first direction and a second detection for detecting the phase difference in the second direction, perform first processing for acquiring the information by the first detection or the second detection in a case where a shutter speed including a period during which the pair of detection signals are generated is longer than a predetermined time, perform second processing for acquiring the information by the first detection irrespective of the second detection in a case where the shutter speed is shorter than the predetermined time, and set the predetermined time to be longer as an F-number of the optical system is larger.

The application provides a camera supporting an allometric image migration compensation function and an allometric image migration compensation method. The camera comprises a camera lens, an electronic shutter, a shutter controller, a light measurement module, a lookup table module and a detector module supporting the allometric image migration compensation function. The lookup table module is used for looking up and comparing light value data and determining an electronic shutter exposure time, a shutter width and a shutter speed. The detector module supporting the allometric image migration compensation function is used for converting light signals collected by the camera lens into electrical signals and simultaneously performing electronic allometric image migration compensation according to the electronic shutter exposure time, the shutter width, the shutter speed and task parameters. The camera supporting the allometric image migration compensation function of the application overcomes the defect that the existing aerial camera does not have a compensation function. Moreover, the camera supporting the allometric image migration compensation function of the application can realize aerial allometric image migration compensation without additionally increasing system hardware devices and can reduce the quality, volume, power consumption and cost of an imaging system.

The embodiment of the present application provides a shutter speed test method and system, and relates to the technical field of shutter test. The shutter speed test method comprises the following steps: controlling a camera to shoot the process that a shutter to be tested moves from above the shutter, so as to obtain a shutter movement image; identifying the number of pixels occupied by the opening caliber of the shutter in each frame of the image, and obtaining a plurality of frames of images containing the opening and closing movement process of the shutter from the shutter movement image; selecting two target images from the plurality of frames of images, and obtaining the movement speed of the shutter according to the number of pixels occupied by the opening caliber of the shutter in each target image, the shooting interval time between the two target images and a preset pixel calibration proportion value. The present application can quickly, accurately and effectively measure the shutter speed, has low test cost, high efficiency, can test a plurality of shutters at one time, and is suitable for production application of shutter speed test.

The aim is to determine the vehicle's condition by taking still images of the instrument panel. [Solution] The vehicle condition determination system comprises: an imaging unit that takes still images of the meter panel installed inside the vehicle; a control unit that takes continuous shots or slows the shutter speed to a certain level or lower during imaging; and a determination unit that determines the vehicle condition based on a plurality of continuously shot still images or still images taken with a shutter speed slowed to a certain level or lower.

This application discloses a shutter speed adjustment method, apparatus, storage medium, and electronic device. The method includes: determining the speed of a moving target and its horizontal distance relative to a capture device; determining the actual distance the moving target travels on the ground when a single exposure capture is performed on the moving target to achieve a preset image sharpness, based on the horizontal distance relative to the capture device and preset capture parameters of the capture device; calculating the target exposure time based on the actual distance and speed; and adjusting the shutter speed based on the target exposure time for capturing the moving target. This technical solution can dynamically adjust the shutter speed of the capture device according to the movement of the moving target, maximizing exposure and optimizing image quality. It also avoids motion blur caused by excessively fast vehicle speeds, thus optimizing the visual effect.

The present invention addresses the problem of providing an image capturing system that captures a high-quality still image of a first-person viewing angle by suppressing jitter of an image of the first-person viewing angle of a worker due to movement of the worker. An image capturing system is provided with: an image acquisition unit that records and acquires a plurality of frame images constituting a first person viewing angle moving image of a worker at a set shutter speed; and an image recording unit that records a part of the plurality of frame images as a first-person-viewing-angle still image, and the shutter speed when recording the first-person-viewing-angle still image is set to be faster than the shutter speed when recording other frame images other than the frame image constituting the first-person-viewing-angle still image among the plurality of frame images.

The application discloses an imaging method and system based on high-speed axial zooming technology, and the method comprises the following steps: acquiring imaging requirement information of a sample to obtain a requirement signal; in the case that the requirement signal is imaging preview, starting a vibration exciter, driving a mirror to axially scan a sample on a sample bin, and adjusting a shutter speed of a camera according to a motion cycle of the vibration exciter and sampling and imaging the sample; in the case that the requirement signal is rapid imaging, stopping the vibration exciter, adjusting the shutter speed of the camera according to a motion cycle of the sample bin and sampling and imaging the sample. By setting two speed imaging modes, the requirements of axial resolution, sampling rate, sampling preview and imaging time under different conditions can be met, and the imaging convenience and compatibility based on the high-speed axial zooming technology are improved.

An image capturing apparatus that has an image sensor for capturing an object image formed through an optical system. A flicker detection section detects a frequency and a phase of flicker. A curtain speed as a time over which a shutter runs from the top to the bottom of the image sensor and a flicker period time as a time of one period of flicker are compared. In a case where the curtain speed is longer than the flicker period time, an image of an object is captured by controlling an image capturing accumulation time period, whereas in a case where the curtain speed is shorter than or equal to the flicker period time, an image of the object is captured by controlling image capturing timing based on the detected frequency and phase of the flicker.

A processor of an imaging apparatus is configured to: perform, based on vibration of the imaging apparatus, movement control of moving the image sensor in a direction in which shake of an image, which is obtained by imaging performed by the image sensor, is corrected; and perform, in the imaging performed by the image sensor, gain-up control of increasing a gain of the movement control in a case where a shutter speed of the mechanical shutter is shorter than a first default time compared to a case where the shutter speed of the mechanical shutter is longer than the first default time.

To provide an imaging device and its control method that suppress the occurrence of flicker fringes in images taken under a flicker light source while enabling flexible selection of shutter speed. [Solution] The imaging device has an image sensor having multiple pixels arranged in a matrix. The imaging device divides the pixel rows of the image sensor into multiple groups and generates a composite image by combining the images obtained from each group. The imaging device controls the operation of the image sensor so that the start timing of the accumulation period for the first pixel row read out in each of the multiple groups has a difference based on the period of change in ambient light brightness and the number of multiple groups.

The invention discloses an automatic exposure parameter linkage control method for photographic equipment, and aims to solve the problem of image quality degradation caused by shutter, aperture and sensitivity parameter split adjustment in existing automatic exposure. According to the method, a comprehensive cost function fusing an exposure physical model, a multi-dimensional image quality loss function and scene semantic priori is constructed, a real-time gradient descent algorithm with projection is adopted under the physical constraint of equipment, and the shutter speed, the aperture relative aperture and the sensitivity gain are synchronously optimized; therefore, the optimal parameter combination which meets the target exposure and considers the requirements of noise, motion blur and depth of field can be output in milliseconds. Through adoption of the technical scheme, the imaging quality and the parameter adjustment smoothness in complex illumination and dynamic scenes can be remarkably improved.