Abstract: A method includes detecting, based on sensor data from a sensor on a mobile device, an environmental brightness measurement, where the mobile device comprises a display screen configured to adjust display brightness based on environmental brightness. The method further includes determining, based on image data from a camera on the mobile device, an extent to which the detected environmental brightness measurement is caused by reflected light from the display screen. The method additionally includes setting a rate of exposure change for the camera based on the determined extent to which the detected environmental brightness measurement is caused by reflected light from the display screen.

Abstract: A system for automatic image band detection includes concurrently capturing a first image of a scene with a first camera having a first exposure time and a second image of the scene with a second camera having a second exposure time. The system detects image banding for one of the first camera and the second camera based on the first image and the second image.

Abstract: An image sensor includes a semiconductor substrate and a multilayer film. The semiconductor substrate includes a photodiode and a back surface having a recessed region that surrounds the photodiode. The multilayer film is on, and conformal to, the recessed region, and includes N layer-groups of adjacent high-? material layers. Each pair of adjacent high-? material layers of a same layer-group of the N layer-groups includes (i) an outer-layer having an outer fixed-charge density and (ii) an inner-layer, located between the outer-layer and the recessed region, that has an inner fixed-charge density. Each of the outer and inner fixed-charge density is negative. The inner fixed-charge density is more negative than the outer fixed-charge density.

Abstract: In an embodiment an apparatus includes a scanning photographic sensor configured to acquire an image, according to an integration time of the sensor, of a scene illuminated with periodically emitted light pulses by a source, so that the image has a regular succession of bands with different luminosities when the integration time of the sensor is different from a period of the light pulses, a processor configured to generate a signature vector representative of the regular succession of bands with different luminosities being present in the image acquired by the photographic sensor, wherein the signature vector is independent of a reflectance of an objects of the scene and of a level of light in the scene, determine a frequency of the bands in the image on basis of the generated signature vector and determine the period of the pulses of the source on basis of the determined frequency of the bands in the image, and a controller configured to adjust the integration time of the photographic sensor so that the int

Abstract: Disclosed are systems, apparatuses, processes, and computer-readable media to capture images with subjects at different depths of fields. A method of processing image data includes capturing an image associated with a first exposure; capturing a plurality of images associated with at least a second exposure, the second exposure being less than the first exposure; generating a combined image from the plurality of images associated with at least the second exposure; and generating a high dynamic range (HDR) image from the image associated with the first exposure and the combined image.

Abstract: There is provided a signal processing device, a signal processing method, and a detection sensor that makes it possible to detect flicker information from an output indicating a luminance change. The signal processing device includes: a change detection unit that detects a first luminance change in a positive direction and a second luminance change in a negative direction among luminance changes detected by a light receiving unit; a coefficient generation unit that generates a coefficient depending on a time at which the luminance change is detected; and an integration unit that integrates a result of multiplication of the first luminance change and the coefficient and integrates a result of multiplication of the second luminance change and the coefficient. The present technology can be applied to, for example, an event detection sensor and the like.

Abstract: An image capture device may include an image sensor having a plurality of light-sensitive pixel sensors to capture light from a scene for generating images and a flicker detection circuit to detect flicker in the light captured by the image sensor. The flicker detection circuit may include one or more event-based readout circuits and at least one event-based processing circuit. The event-based readout circuits may detect a series of events associated with the flicker in the light captured by the image sensor. The event-based processing circuit may determine a frequency of the flicker in the captured light based on the series of events detected by the event-based readout circuits. In some embodiments, the frequency may be used to adjust the exposure time of the image sensor, e.g., to identify intervals for exposure when the captured light is bright.

Abstract: An apparatus comprises a sensor configured to capture a subject, a photometric unit configured to perform photometry using at least either a first image, or a second image intended for recording, both of which are captured using the sensor, a determination unit configured to determine exposure of the second image to be captured next, based on a result of photometry performed using the image that is less affected by flicker among the first image and the second image, wherein the first image and the second image can be displayed on a display device during continuous shooting using the sensor.

Abstract: An optical sensor, for sensing a sensing frame corresponding to a flicker period of ambient light, comprising: a pixel array, configured to perform N times of exposure operations via at least one pixel of the pixel array in N exposure time intervals to generate N sub-frames, wherein a summation of the N exposure time intervals equals to a sensing interval and the sensing interval is less than or identical to a first flicker period. The optical sensor adds the N sub-frames to generate a summing sub-frame. The sensing frame comprises the summing sub-frame. The adding operation can also be performed to digital signals generated from the sub-frames. The influences caused by the fluctuation of ambient light can be neutralized, since the frame or portion of the frame is sensed at least twice at different phases of a single flicked period. By this way, the conventional flicker issue can be improved.

Abstract: An optoelectronic sensing device may include an optoelectronic detection device configured to detect light and provide an electrical signal as a function of detected light. The device may further include a signal detection device configured to store at least one signal value of the electrical signal in a memory during a time interval of repeating time intervals and to output an indication signal after the time interval has elapsed.

Abstract: There is provided an optical sensor including a photodiode, a wave converter, a pixel array and a processor. The photodiode detects ambient light flicker to generate sine waves. The wave converter converts the sine waves to square waves. The processor uses a sampling frequency to count the square waves, and identifies whether the ambient light flicker is well detected according to a counting value of each square wave and a counting value variation of multiple square waves within a count period to accordingly determine whether to recognize a frequency of ambient light flicker and adjust an acquiring phase of the image frame.

Abstract: A flicker measurement device includes a first processing unit that performs a first process of calculating respective flicker values of a plurality of measurement regions set on a measurement object based on a photometric quantity of the measurement object obtained from the measurement object under a measurement condition of a flicker for each of the plurality of measurement conditions stored in advance in a measurement condition storage unit, a second processing unit that performs a second process of generating linked data in which data composed of the respective flicker values of the plurality of measurement regions calculated by the first processing unit and the measurement conditions are linked for each of the plurality of measurement conditions, and a third processing unit that performs a third process of storing the linked data generated by the second processing unit in a linked data storage unit for each of the plurality of measurement conditions.

Abstract: Disclosed herein are cameras and image sensors, and electronic devices containing them, having pixel arrays operable both for obtaining images and detecting flicker in ambient light. For flicker detection, such as prior to image capture, light-generated current from a set of pixels of the pixel array is received at a transimpedance amplifier (TIA) that is formed in a common semiconductor substrate with the pixel array. An output signal of the TIA is digitized and signal processed to detect the flicker in the ambient light. Also disclosed are image sensors having pixel arrays with an embedded modulated light source. The modulated light source may be used for proximity detection, either by time-of-flight or intensity variation of reflected light.

Abstract: Provided is a method for removing flicker in a video by an electronic device, the method including obtaining a plurality of red-green-blue (RGB) video frames of a scene in a field of preview of a camera included in the electronic device, obtaining a position of at least one light source in the plurality of video frames, obtaining a brightness of the at least one light source based on the position of the light source, obtaining a de-flickering factor for each pixel in the plurality of video frames based on the position of the at least one light source and the brightness of the at least one light source, and applying the de-flickering factor to each of the plurality of video frames to remove the flicker.

Abstract: A method of extracting high-frequency temporal information from images or video recorded with a rolling shutter-based imager includes the steps of acquiring image data using the rolling shutter-based imager; and extracting time-domain frequency information from the image data based on two or more lines of pixels in the image data.

Abstract: A detection apparatus detects whether there is flicker attributed to a light source. The apparatus obtains a plurality of captured images related to a subject by performing image capture continuously with use of an image sensor; determines whether a capturing field angle has changed due to an operation of an image stabilizing mechanism during the image capture for the plurality of captured images; and detects whether flicker of a predetermined level has occurred based on the plurality of captured images. In a case where the apparatus has determined that the capturing field angle has changed due to the operation of the image stabilizing mechanism during the image capture for the plurality of captured images, the apparatus restricts regions in the plurality of captured images used for detecting whether the flicker of the predetermined level has occurred.

Abstract: Embodiments are generally directed to identification of objects for three-dimensional depth imaging. An embodiment of an apparatus includes one or more processors to process image data and control operation of the apparatus; an image sensor to collect image data; and a receiver and transmitter for communication of data, wherein the apparatus is to receive a notification of a first device entering a physical space, transmit a request to the device for a light signal to identify the device, detect the light signal from the device, determine a location of the device, and store an identification for the first device and the determined location of the first device in a database.

Abstract: An apparatus comprises a sensor configured to capture a subject; and a control unit configured to perform exposure control for when capturing a subject using the sensor by adjusting at least an accumulation period, a diameter of an aperture of a diaphragm, and an image capturing sensitivity, wherein the control unit, in a case of capturing a subject to obtain an image for detection, which is an image for detecting a flicker by using the sensor, performs exposure control by prioritizing increasing an image capturing sensitivity and opening the aperture of the diaphragm rather than increasing an accumulation period of the sensor.

Abstract: An imaging apparatus includes a variable neutral density filter that has a variable transmittance; an imaging device on which object light via the variable neutral density filter forms an image; variable transmittance drive circuitry that changes the transmittance of the variable neutral density filter in accordance with a transmittance control value; a hardware input device that can be in a first state or in a second state depending on a change in form; and transmittance designation circuitry. Further, when the hardware input device is in the first state, the transmittance designation sets the transmittance control value in accordance with an operation amount of the hardware input device and notifies the variable transmittance drive circuitry of the transmittance control value.

Abstract: The present disclosure discloses an image flicker detection method that includes the steps outlined below. An image retrieving is performed to retrieve a current image. A current variation ratio between first rows of pixels of the current image and second rows of pixels in a previous image is calculated. When both the current variation ratio and a previous variation ratio are determined to be larger than a ratio threshold, a detected flicker number is incremented. When the detected flicker number is determined to be larger than a flicker number threshold, a flicker condition is determined to occur. When the detected flicker number is determined to be not larger than the flicker number threshold, the current image becomes the previous image and the current variation ratio becomes the previous variation ratio such that a next image becomes the current image to repeat the above steps.

Abstract: An image capturing apparatus includes a driving control unit configured to control driving of an image sensor, and a flicker detection unit configured to detect flicker, which is a periodic change in a light amount of an object, based on a signal output from the image sensor, wherein the driving control unit is configured to, if the image sensor outputs a flicker detection signal to be used in detecting the flicker, control the driving of the image sensor at n different frame rates, n being a natural number greater than or equal to 3, wherein a least common multiple of the n frame rates used in detecting the flicker is not same as any of the n frame rates, and wherein the flicker detection unit is configured to detect the flicker based on the flicker detection signal obtained at each of the n frame rates.

Abstract: An apparatus comprises: a sensor that shoots a subject and outputs an image; a shift unit that shifts a position on the sensor of an image of the subject incident on the sensor; and a detection unit that detects flicker based on partial images in a same partial region of a plurality of images consecutively obtained from the sensor. In a case where the sensor shoots the plurality of images while the shift unit is shifting the position of the image of the subject, the detection unit selects the partial region so that a change of the image of the subject in the partial region caused by the shift becomes small between the plurality of images.

Abstract: This invention enables one to check flicker of a HFR image signal. A display image signal of a first frame rate for flicker check is obtained on the basis of an image signal of a second frame rate. For example, the display image signal of the first frame rate is generated from the image signal of the second frame rate by a frame thinning process. In this case, a frame to be thinned is determined from a relationship between the second frame rate and a light source frequency. For example, the number of frames to be a flicker period is obtained from the second frame rate and the light source frequency, and the frame to be thinned is determined so that continuous frames of the number of frames to be the flicker period are present.

Abstract: A flicker detection circuit is provided. The flicker detection circuit may include a flicker detection correlated double sampling (FD CDS) circuit including first to sixth switches turned on or off based on a control signal, and first to fourth capacitors, the FD CDS circuit being configured to receive a flicker pixel signal output from at least one pixel, summate with an output offset signal, and amplify the summation based on a gain to form a flicker detection signal; and an analog-to-digital converter (ADC) configured to quantize the flicker detection signal.

Abstract: A method operable by circuitry including an image processor, an image sensor, and another clock-dependent device, including measuring a flicker using the image sensor, adjusting a clock rate of the circuitry according to the measured flicker, and operating the clock-dependent device using the adjusted clock rate.

Abstract: An image capturing apparatus comprises an image sensor, a drive control unit for the image sensor, and a detection unit configured to calculate an evaluation value based on second images and detect flicker based on the evaluation value. The drive control unit controls to perform, during a live view cycle of a display device, a first operation for reading out a first image to be displayed, and a second operation for reading out the second images at a second cycle which is shorter than the time taken to read out the first image at timings different from a timing of reading out the first image. Upon calculating the evaluation value based on the second images, the detection unit detects flicker by using different pairs of images from among the second images for calculation of the evaluation value according to the first cycle.

Abstract: A device includes a charge variation sensor having at one or more electrodes. The charge variation sensor, in operation, generates a charge variation signal indicative of changes in an electric or electrostatic charge induced on the one or more electrodes by an alternating current power source. Processing circuitry, coupled to the charge variation sensor, generates a frequency spectrum signal based on the charge variation signal and identifies a frequency of operation associated with the alternating current power source based on the generated frequency spectrum signal. A control signal is generated based on the identified frequency of operation. An image acquisition device sets an image acquisition frequency based on the control signal.

Abstract: The present disclosure provides a method, apparatus, medium, and electronic device for evaluating environmental noise of device. The method comprises obtaining original image data to be displayed; determining at least part of the original image data to be displayed as source data; obtaining comparison data according to the source data; obtaining a difference value according to the comparison data and the source data; and evaluating environmental noise of device according to the difference value.

Abstract: An image capturing apparatus includes an image capturing unit configured to change a charge accumulation time for each area, a histogram calculation unit configured to calculate a histogram of a pixel value for the each area, an area increase/decrease unit configured to increase or decrease the number of divisions of the area based on the histogram calculated by the histogram calculation unit, and a determination unit configured to determine a charge accumulation time of the each area of which number has been increased or decreased by the area increase/decrease unit.

Abstract: There is provided an image sensor for exposing a plurality of pixel rows within a frame period using a rolling shutter. The image sensor includes a processor for calculating bright-dark distribution patterns of image frames. The processor further adjusts the frame period to be substantially identical to a predetermined period by changing a total number of exposed line times within the frame period when a difference between the bright-dark distribution patterns of two image frames is larger than a predetermined threshold.

Abstract: An apparatus that moves a focus lens, performs a scan operation of sequentially acquiring a focus signal, acquires a focus position of the focus lens based on the focus signal, and includes: a determination unit configured to determine whether an object is blinking at a predetermined period, and a processing unit configured to perform a filtering process in a time axis direction on the acquired focus signal where the object is blinking at the predetermined period.

Abstract: An image pickup system in which a plurality of image pickup apparatuses capable of performing continuous image pickup cooperate. At least one image pickup apparatus is set as a measurement apparatus for periodically detecting changes in brightness, caused by a light source, with respect to a subject of which an image is to be picked up, to generate light source flicker information during continuous image pickup. At least one image pickup apparatus is set as a reception apparatus for receiving the light source flicker information periodically transmitted from the measurement apparatus and executes each image pickup operation during continuous image pickup at a timing determined based on the light source flicker information received from the measurement apparatus.

Abstract: Provided herein is an image-sensing device and a method for auto white balance. An image signal processor is used to perform the method. In the method, an RGBIr photo sensor receives an image with data over red, green and blue channels. The image data over the red, green and blue channel is firstly restored. A series of weights are calculated according to the image data over an infrared channel. The weights are allocated to the image data so as to adjust the infrared ratios over the red, green and blue channels for reducing infrared effect on auto white balance. After that, an infrared weighting calculation is performed for adjusting the infrared values over the red, green and blue channels of the image. A set of white balance gains are obtained. An auto white balance is performed for obtaining a new image with infrared crosstalk compensation.

Abstract: In an imaging apparatus as an embodiment, a drive unit drives pixels so that a photoelectric conversion unit alternately performs accumulation of charges in a first exposure period and accumulation of charges in a second exposure period having different length from the first exposure period. A control unit performs a first exposure in a first cycle and performs a second exposure in second cycle when a result of detection indicates that a subject is not blinking. Further, the control unit performs a first exposure in a cycle different from the first cycle when the result of detection indicates that the subject is blinking.

Abstract: Systems and methods for imaging scenes illuminated by light sources that are powered by alternating current. Data concerning these light sources are extracted from the imagery. Systems comprising a rolling shutter imaging sensor and configured to de-flicker images with spatial flicker are also provided.

Abstract: Disclosed is a method for driving a display. The method includes calculating differences between digital codes corresponding to grayscale voltages each provided to pixels connected to the same data line and gate lines which are sequentially driven, summing digital code differences of a threshold value or more, generating a compensation code corresponding to the summation result, and providing grayscale voltages compensated with the compensation code to pixels of which digital codes have a difference of less than the threshold value.

Abstract: This invention enables one to check flicker of a HFR image signal. A display image signal of a first frame rate for flicker check is obtained on the basis of an image signal of a second frame rate. For example, the display image signal of the first frame rate is generated from the image signal of the second frame rate by a frame thinning process. In this case, a frame to be thinned is determined from a relationship between the second frame rate and a light source frequency. For example, the number of frames to be a flicker period is obtained from the second frame rate and the light source frequency, and the frame to be thinned is determined so that continuous frames of the number of frames to be the flicker period are present.

Abstract: An image capture apparatus comprising a plurality of pixels, each pixel having a light-receiving circuit that outputs a pulse signal in response to incidence of a photon and a counting circuit configured to count the pulse signal, is disclosed. The image capture apparatus further comprises a detection circuit that detects whether or not a flickering light source is present in a field of view, based on an output frequency of the pulse signal.

Abstract: There is provided with an image processing apparatus. A target image including an object, for a predetermined imaging range, is obtained. A background image, which is obtained from a selected image selected from a captured image for the predetermined imaging range based on brightness of the target image, is obtained. A region of the object in the target image based on the background image is obtained.

Abstract: An image pickup apparatus includes an image pickup device that picks up a subject by driving by a rolling shutter method, a memory that stores a set of instructions and at least one processor that executes the instructions to divide, when driving the image pickup device at a second frame rate lower than a first frame rate, a plurality pieces of image data successively acquired by the image pickup device at the second frame rate into predetermined areas to acquire data of divided areas, and perform flicker detection using a predetermined number of pieces of the data of the divided areas successive for a plurality of frames.

Abstract: There is provided an image sensor for exposing a plurality of pixel rows within a frame period using a rolling shutter. The image sensor includes a processor for calculating bright-dark distribution patterns of image frames. The processor further adjusts the frame period to be substantially identical to a predetermined period by changing a total number of exposed line times within the frame period when a difference between the bright-dark distribution patterns of two image frames is larger than a predetermined threshold.

Abstract: Techniques and apparatuses are described for reducing a flicker effect of multiple light sources in an image captured with an imaging device. A lighting frequency associated with each of the multiple light sources is detected and prioritized relative to a flicker effect upon the image to identify at least a first-prioritized lighting frequency and a second-prioritized lighting frequency. A first exposure-time factorization set is determined for the first-prioritized lighting frequency, and a second exposure-time factorization set is determined for the second-prioritized lighting frequency. An exposure time of the imaging device is adjusted to an exposure time identified in the first exposure-time factorization set that matches, or aligns near-to-matching, an exposure time identified in the second exposure-time factorization set.

Abstract: An imaging control apparatus includes: a flicker detecting section configured to detect a flicker component of a light source, the flicker component being included in an image; and a controlling section configured to control timing of imaging according to a detection result by the flicker detecting section, in which the controlling section controls the timing of the imaging according to timing of a peak or a bottom of the flicker component detected.

Abstract: Systems, methods, and computer-readable media are disclosed for reducing flickering artifacts in imaged light sources. Example methods may include receiving images corresponding to a scene captured by a camera; determining a light source in the scene using at least one artificial intelligence (AI)-based algorithm; determining, using an event-based camera, data representing flickering of the light source, the flickering having a frequency; determining, based on the data, that a time duration of overlap between an on state of the light source and an exposure time of the camera is below a threshold; and delaying the exposure time of the camera by a delay time to increase the time duration of overlap.

Abstract: This application provides an image processing method and an image collection device. A haze intensity of a first image is calculated. When the haze intensity of the first image is greater than a first threshold, control information is sent, where the control information is used to control a haze penetration optical component to move into a lens. Because the haze penetration optical component can improve quality of optical imaging, the lens into which the haze penetration optical component is moved has a function of optical haze penetration. It can be learned that, when the haze intensity of the first image is greater than the first threshold, the function of the optical haze penetration is enabled, so as to improve quality of an image obtained in a haze environment.

Abstract: Provided is an imaging control device including a control unit and a flickering correction unit. The control unit adjusts a parameter of a correction signal for correcting a flickering component included in a captured image before imaging of the captured image starts. The flickering correction unit corrects the flickering component included in the captured image based on the parameter of the correction signal after adjustment.

Abstract: The present technology relates to a signal processing apparatus, an imaging apparatus, and a signal processing method capable of reliably imaging a blinking imaging target in a scene having a very large difference in brightness. By detecting a difference between a plurality of images captured with different exposure times, calculating a combination coefficient indicating a combination ratio between the plurality of images on the basis of the difference, and combining the plurality of images on the basis of the combination coefficient, it is possible to reliably image a blinking imaging target in a scene having a very large difference in brightness. The present technology can be applied to, for example, a camera unit that captures an image.

Abstract: In one embodiment, a computing system receives one or more signals indicative of light intensities captured by one or more cameras. These signals are captured in a plurality of frames at a first frame rate. The computing system calculates light intensity metrics for each frame of the plurality of frames based on the one or more signals captured in the respective frames. The computing system detects one or more peaks based on the light intensity metrics associated with one or more frames of the plurality of frames. The one or more frames were captured in a predetermined time period. The computing system determines a likelihood of perceptible flicker based on the detected one or more peaks. The computing system causes the one or more cameras to capture frames at a second frame rate in response to a determination that the likelihood of perceptible flicker exceeds a predetermined threshold.

Abstract: An imaging control device including: a control unit configured to perform control such that an exposure timing is synchronized with a timing of a peak of a detected flickering component on a basis of a period of the flickering component and the timing of the peak of the flickering component.

Abstract: Methods and apparatuses in which a plurality of images are recorded at different illumination angles are provided. The plurality of images are combined in order to produce a results image with an increased depth of field.