Image sensing device and high dynamic range image generation method thereof

An image sensing device, comprising:

• a pixel array, comprising a plurality of sensing pixels, wherein each of the sensing pixels is electrically connected to a plurality of data readout lines;
• a readout circuit, electrically connected to the data readout lines, wherein the data readout lines of each of the sensing pixels comprise a first data readout line and a second data readout line;
• and
• a processing circuit, electrically connected to the readout circuit,
• wherein, each of the sensing pixels outputs a first sensing signal corresponding to a first exposure period within a row exposure period through the first data readout line,
• each of the sensing pixels outputs a second sensing signal corresponding to a second exposure period within the row exposure period through the second data readout line, a period length of the first exposure period is different from a period length of the second exposure period,
• the processing circuit generates a high dynamic range image based on the first sensing signal and the second sensing signal of each of the sensing pixels.