A method comprising receiving data representing light intensity values corresponding to a flicker pattern of a reference light source powered by an alternating current (AC); operating a controllable illumination source, based, at least in part, on said data; capturing, using an imaging device, a sequence of images of a scene illuminated, at least in part, by said controllable illumination source; estimating an intensity value for at least one pixel in said array, correspondingly in each of said images in said sequence of images; and determining a temporal point in said flicker pattern of said reference light source, based, at least in part, on said estimating.

Aspects of the present invention relate to an image correction system (300) for mitigating image flicker from strobed lighting systems. The image correction system (300) comprises one or more controllers (120) comprising input means (122), processing means (121) and output means (122). The input means (122) is configured to receive, from a first imaging apparatus (111) comprising a first pixel array configured to operate with at least a first exposure time, first image data (141) indicative of an environment. The input means (122) are configured to receive, from a second imaging apparatus (112) comprising a second pixel array configured to operate with at least a second exposure time different to the first exposure time, second image data (142) indicative of at least a portion of the environment. The processing means (121) are configured to identify strobed lighting regions of the first image data (141) and strobed lighting regions of the second image data (142); and to determine corrected image data for mitigating image flicker of the strobed lighting regions of the first image data (141) in dependence on a correspondence between the strobed lighting regions of the first image data (141) and the strobed lighting regions of the second image data (142). The output means (122) is configured to output a signal indicative of the corrected image data.

An apparatus includes a detection unit configured to detect a flicker frequency of a subject light source by sampling an output signal of a sensor in first sampling processing, a determination unit configured to determine whether the detected flicker frequency falls within a detection target range, by sampling an output signal of the sensor in second sampling processing, and a control unit configured to perform control to notify a user in response to determination by the determination unit that the detected flicker frequency falls out of a detection target range in the first sampling processing.

There is provided an optical sensor that acquires a first image frame corresponding to a first flicker period and acquires a second image frame corresponding to a second flicker period. The optical sensor adds the first image frame to the second image frame to generate a sum of image frames for the motion detection. Or, the optical sensor respectively adds pixel data of every two pixels in neighboring rows of the first image frame and the second image frame to generate a low-resolution image frame for the motion detection.

An electronic apparatus is provided. The electronic apparatus includes a display and a processor configured to obtain a low-frequency variation amount based on low-frequency information corresponding to a first frame and low-frequency information corresponding to a second frame, obtain a high-frequency variation amount based on high-frequency information corresponding to the first frame and high-frequency information corresponding to the second frame, obtain a weight based on a difference between the low-frequency variation amount and the high-frequency variation amount, apply the weight to a high-frequency frame corresponding to the second frame, obtain an output frame corresponding to the second frame, based on the second frame and a high-frequency frame to which the weight is applied, and control the display to display the obtained output frame.

A control section sets an exposure timing and an exposure period for imaging pixels for acquiring an imaging picture and light intensity detection pixels for detecting intensity of illumination light individually by an imaging section. A correction gain calculation section calculates a flicker correction gain for each of the imaging pixels on the basis of pixel signals generated by the imaging pixels and pixel signals generated by the light intensity detection pixels. A flicker correction section uses the flicker correction gain for each imaging pixel calculated by the correction gain calculation section to perform flicker correction of the imaging pixel. Accordingly, an imaging picture can be obtained on which the influence of fluctuation of the intensity of emission light is reduced irrespective of the positional relationship between an illumination apparatus and an imaging object.

The present disclosure provides an anti-flashlight circuit assembly and an image sensor. The anti-flashlight circuit assembly includes a plurality of flashlight detection units. Each flashlight detection unit includes: a first photoelectric detection module configured to monitor an optical signal in real time and output a corresponding electric signal; a first triggering generation module configured to generate a first triggering generation signal when the electric signal exceeds a predetermined threshold, and output the first triggering generation signal to a first interface logic module; and the first interface logic module configured to output a triggering state signal upon the receipt of the first triggering generation signal.

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.

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.

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.