Method, system and device for generating dense focus stack image and storage medium

The invention discloses a method, system and device for generating a dense focus stack image and a storage medium, and belongs to the field of image processing, and the method comprises the steps: S1, numbering a group of focus stack images with sparse focal length domains according to focal lengths; s2, sequentially partitioning the numbered focus stack image into block groups and corresponding block pairs; s3, taking one block in the block pair as a reference block, taking the other block as a current block, performing mode transformation on the reference block to obtain a fitting block and fitting parameter pairs, and selecting the fitting parameter pair with the minimum error between the fitting block and the current block as a first fitting parameter pair of the current block pair; s4, generating a prediction parameter pair by using the first fitting parameter pair as an optimal fitting parameter pair, and performing mode transformation on the reference block by using the prediction parameter pair to obt