Video image blind denoising method used in mine shaft environment

The invention relates to a video image blind denoising method used in a mine environment. The method comprises the following steps of: selecting a plurality of image frames adjacent to a to-be-denoised video image in front of and behind the to-be-denoised video image, searching an image block group with typical characteristics in each image frame, and determining inter-frame accurate displacementby searching a block group having the minimum difference degree with the image block group in a previous frame of image; dividing the to-be-denoised video image into a plurality of image blocks, and quickly constructing a self-similarity sequence set of each image block according to the inter-frame accurate displacement; combining two-dimensional image blocks corresponding to the self-similarity sequence set into a three-dimensional matrix, performing three-dimensional transformation, and performing adaptive threshold filtering on a transformation coefficient; and aggregating the three-dimensional matrix which has bee