Image recognition method and image recognition system

The invention provides an image recognition method and an image recognition system. The image recognition method comprises the following steps: S1, acquiring an image according to a user instruction; s2, carrying out preprocessing on the obtained image; s3, identifying the preprocessed image to obtain primary identification data, comparing the primary identification data with a background pre-stored data set for verification, and if the primary identification data is equal to one of the data in the background pre-stored data set, skipping to step S8; otherwise, skipping to the step S4; s4, carrying out gray processing on the preprocessed image, and obtaining a gray image; s5, performing binarization processing on the gray level image according to a preset gray level threshold value to obtain re-identification data, and endowing the re-identification data with a credibility value by the identification system; s6, repeating the step S5 to obtain at most 20 groups of secondary identification data; s7, sorting th