Imaging method, imaging device, and electronic device

An imaging device, comprising:

• an image sensor, the image sensor comprising:
• a photosensitive pixel array;
• a filter arranged on the photosensitive pixel array, the filter comprising a filter cell array, each filter cell covering a plurality of photosensitive pixels to form a merged pixel;
• and
• an image processing module coupled with the image sensor, and the image processing module configured to read outputs of the photosensitive pixel array, and add the outputs of the photosensitive pixels of the corresponding merged pixel to obtain a pixel value of the merged pixel, thereby producing a merged image,
• wherein the imaging device comprises a control module, and the control module is configured to control the line-by-line exposure of the photosensitive pixel array;
• wherein the imaging device comprises a register, the control module is configured to sequentially gather the outputs of the photosensitive pixels of rows k and k+1, which are completed by current exposure, and store the outputs into the register, wherein k=2n−1, n is a natural number, and k+1 is less than or equal to the total number of rows of the photosensitive pixel array, wherein the imaging sensor comprises an analog-to-digital converter, each photosensitive pixel is connected to an analog-to-digital converter, the analog-to-digital converter is configured to convert analog signal outputs of the photosensitive pixels into digital signal outputs;
• the digital signal outputs are configured to be stored in the register;
• the image processing module is configured to add the digital signal outputs of the photosensitive pixels of the corresponding merged pixel to obtain a pixel value of the merged pixel.