An imaging device includes a first substrate, a second substrate, a third substrate, and a switching unit. The first substrate has a pixel including a photodiode and floating diffusion that holds the charge converted by the photodiode. The second substrate has a pixel circuit that reads out a pixel signal based on the charge held in the floating diffusion in the pixel, and is stacked on the first substrate. The third substrate has a processing circuit that detects a pixel signal read out by the pixel circuit, and is stacked on the second substrate. The switching unit is provided to enable electrical connection between the floating diffusion and a floating diffusion of another pixel in the first substrate, and is provided on the second substrate. As a result, by switching the capacitance of the floating diffusion of the pixel using floating diffusion of another pixel, it is possible to switch the charge-voltage conversion efficiency levels.

An image processing apparatus includes a correction factor calculating unit configured to calculate a correction factor for correcting a difference in pixel values corresponding to a difference between a spectral sensitivity and a preset reference spectral sensitivity in a predetermined wavelength range at a pixel of interest, based on image data generated by an image sensor, the image sensor having a plurality of pixels on which color filters of a plurality of colors with different spectral transmittances are respectively disposed, the color filters forming a predetermined array pattern, the correction factor calculating unit being configured to calculate the correction factor for each of the plurality of pixels on which at least a predetermined color filter of the color filters is disposed.

There is provided a solid-state image sensor including a pixel circuit including a plurality of pixels and imaging a subject, a peripheral circuit provided in a vicinity of the pixel circuit and performing operation in regard to imaging, and a connection element electrically connecting, in initialization of the pixels, elements in the pixels to which a predetermined voltage is applied for initializing the pixels to the peripheral circuit with the predetermined voltage.

An image processing apparatus includes a determination unit configured to determine an optical transfer function based on shooting condition information, an acquisition unit configured to acquire shake information, a control unit configured to select a method of image restoration based on the optical transfer function and the shake information, and an image restoration unit configured to perform the image restoration based on the selected method of the image restoration.

A pair of pupil regions of an exit pupil, through which light beams received by a pair of photoelectric conversion units included in a pixel portion of a first image sensor respectively pass, are overlapped. A pair of pupil regions of an exit pupil, through which light beams received by a pair of photoelectric conversion units included in a pixel portion of a second image sensor respectively pass, are overlapped. A second base length, which is a distance between centroids of the pair of pupil regions corresponding to the pair of photoelectric conversion units included in the pixel portion of the second image sensor, is longer than a first base length, which is a distance between centroids of the pair of pupil regions corresponding to the pair of photoelectric conversion units included in the pixel portion of the first image sensor.

An imaging apparatus includes: an imaging element; an imaging element driving unit that directs the imaging element to alternately perform imaging operations at a first frame rate and a second frame rate being different from the first frame rate; and a flicker detection unit that detects whether a first flicker of a light source with a first frequency is present and whether a second flicker of a light source with a second frequency is present, based on a captured image signal obtained by an imaging operation at the first frame rate, a captured image signal obtained by an imaging operation at the second frame rate following the imaging operation at the first frame rate and a captured image signal obtained by an another imaging operation at the first frame rate or the second frame rate, wherein the first frame rate and the second frame rate are as defined herein.

An imaging apparatus includes: an imaging element; an imaging element driving unit that directs the imaging element to alternately perform imaging operations at a first frame rate and a second frame rate being different from the first frame rate; and a flicker detection unit that detects whether a first flicker of a light source with a first frequency is present and whether a second flicker of a light source with a second frequency is present, based on a first captured image signal obtained by an imaging operation at the first frame rate and a second captured image signal obtained by an imaging operation at the second frame rate as defined herein, and a sum of a duration of a first frame period based on the first frame rate and a duration of a second frame period based on the second frame rate is a value as defined herein

A comparing circuit may include a first amplifier and a second amplifier. The first amplifier performs a correlated double sampling operation in response to a pixel signal and a ramp signal, and the second amplifier amplifies an output signal of the first amplifier. The second amplifier includes a current stabilization circuit that supplies current to the second amplifier during the correlated double sampling operation irrespective of the output signal of the first amplifier.

An image pickup apparatus which is capable of properly detecting and compensating for flash bands to generate a corrected image with no different levels of luminance. Based on an image signal output from an image pickup device which sequentially starts exposure and reads out signals for each row of pixels, a flash band appearing in a plurality of frames consecutive in terms of time due to an external flash is detected. Gains are changed with rows of the frames. At least one of the frames in which the flash band was detected is corrected to a full-screen flash image. When flash bands caused by a plurality of external flashes fired in one frame is detected, a gain is calculated based on a light quantity ratio between the external flashes, and a region where the flash bands overlay each other is multiplied by the gain to generate the full-screen flash image.

An image sensor pixel may include a photodiode, a charge storage region, a floating diffusion node, and a capacitor. A first transistor may be coupled between the photodiode and the charge storage region. A second transistor may be coupled between the charge storage region and the capacitor. The photodiode may generate image signals corresponding to incident light. Multiple image signals may be summed at the charge storage region. The second transistor may determine a portion of the image signal that may be sent to the capacitor for storage. The portion of the image signal that is sent to the capacitor may be a low gain signal. A remaining portion of the image signal may be a high gain signal. The image sensor pixel may also include readout circuitry that is configured to readout low and high gain signals stored at the floating diffusion node in a double-sampling readout operation.