Low-illumination imaging method based on frame accumulation

The invention discloses a low-illumination imaging method based on frame accumulation. The low-illumination imaging method comprises the following steps: firstly, performing Surf characteristic point matching on multiple frames of images which are output after being processed by a prior ISP so as to obtain calibrated images; accumulating multiple frames of continuous captured images, wherein as overexposure of images can be caused by simple overlapping, a weighting accumulation mode is adopted, and each image has an equal weight; finally, on the basis of a self-adaptive partial Gamma correction method, performing Gamma correction on images to be processed, and outputting finally processed images. By adopting the low-illumination imaging method disclosed by the invention, a sequence image multi-frame accumulation technique is adopted for a static image sequence according to relevance of signals of different frames and irrelevance of noise, the signal to noise ratios of the images can be greatly reduced, and th