A correction device includes: an offset updating unit, a calculating unit and a gain stretching unit. The offset updating unit is configured to generate a plurality of updated offset values according to a plurality of base offset values, wherein each of the plurality of updated offset values corresponding to one column of pixel values among a plurality of columns of pixel values generated by an image sensor. The calculating unit is configured to generate a plurality of columns of corrected pixel values according to the plurality of updated offset values and the plurality of columns of pixel values. The gain stretching unit is coupled to the calculating unit and configured to determine a compensation gain according to the plurality of updated offset values and accordingly generate a plurality of columns of output pixel values according to the compensation gain and the plurality of columns of corrected pixel values.

A photoelectric conversion device is provided. The photoelectric conversion device includes a plurality of pixels, and a correction unit configured to correct, in accordance with correction data, a black level of pixel signals output from the plurality of pixels. The correction unit is configured to: change a level of a selection signal from a first level to a second level if a state of a photoelectric conversion system where the photoelectric conversion device is arranged changes in one frame period during which signals for generating one image are obtained; and select a setting for generating the correction data from a plurality of settings in accordance with the level.

A photoelectric conversion device is provided. The photoelectric conversion device includes a plurality of pixels, and a correction unit configured to correct, in accordance with correction data, a black level of pixel signals output from the plurality of pixels. The correction unit is configured to: change a level of a selection signal from a first level to a second level if a state of a photoelectric conversion system where the photoelectric conversion device is arranged changes in one frame period during which signals for generating one image are obtained; and select a setting for generating the correction data from a plurality of settings in accordance with the level.

A pixel region includes: pixels each including a plurality of photoelectric conversion devices; a light-shielding region; and an effective region. A reading circuit reads, from a first row of the pixel region, a pixel signal obtained by adding signals of the plurality of photoelectric conversion devices, and reads, from a second row of the pixel region, a plurality of signals including phase difference information. A horizontal streak correction circuit performs one of a first offset correction based on a signal read from the light-shielding region and a second offset correction based on a predetermined value on a pixel signal obtained from a second row of the effective region. An image processing circuit processes image data according to a parameter. The horizontal streak correction circuit selects the first offset correction or the second offset correction according to the parameter.

A pixel region includes: pixels each including a plurality of photoelectric conversion devices; a light-shielding region; and an effective region. A reading circuit reads, from a first row of the pixel region, a pixel signal obtained by adding signals of the plurality of photoelectric conversion devices, and reads, from a second row of the pixel region, a plurality of signals including phase difference information. A horizontal streak correction circuit performs one of a first offset correction based on a signal read from the light-shielding region and a second offset correction based on a predetermined value on a pixel signal obtained from a second row of the effective region. An image processing circuit processes image data according to a parameter. The horizontal streak correction circuit selects the first offset correction or the second offset correction according to the parameter.

A stripe noise image optimization method, apparatus, device and a medium are provided. The method includes: extracting candidate stripe noises in a stripe noise image, and determining candidate stripe windows based on adjacent candidate stripe noises; determining a target stripe window based on candidate center distances between the candidate stripe windows and a region-of-interest window in the stripe noise image; and adjusting an acquisition parameter of an image sensor based on a target center distance between the target stripe window and the region-of-interest window, to allow the target center distance between the target stripe window and the region-of-interest window in the stripe noise image acquired according to an adjusted acquisition parameter to meet a preset distance condition.

A correction device includes: an offset updating unit, a calculating unit and a gain stretching unit. The offset updating unit is configured to generate a plurality of updated offset values according to a plurality of base offset values, wherein each of the plurality of updated offset values corresponding to one column of pixel values among a plurality of columns of pixel values generated by an image sensor. The calculating unit is configured to generate a plurality of columns of corrected pixel values according to the plurality of updated offset values and the plurality of columns of pixel values. The gain stretching unit is coupled to the calculating unit and configured to determine a compensation gain according to the plurality of updated offset values and accordingly generate a plurality of columns of output pixel values according to the compensation gain and the plurality of columns of corrected pixel values.

A correction device includes: an offset updating unit, a calculating unit and a gain stretching unit. The offset updating unit is configured to generate a plurality of updated offset values according to a plurality of base offset values, wherein each of the plurality of updated offset values corresponding to one column of pixel values among a plurality of columns of pixel values generated by an image sensor. The calculating unit is configured to generate a plurality of columns of corrected pixel values according to the plurality of updated offset values and the plurality of columns of pixel values. The gain stretching unit is coupled to the calculating unit and configured to determine a compensation gain according to the plurality of updated offset values and accordingly generate a plurality of columns of output pixel values according to the compensation gain and the plurality of columns of corrected pixel values.