Barcode image copying detection method based on multi-scale statistical feature enhancement

The invention discloses a bar code image copying detection method based on multi-scale statistical feature enhancement, and the method comprises the steps: 1, converting a to-be-detected image into a gray-scale image, and removing the low-frequency components of the image through calculating a multi-scale residual image of the gray-scale image; 2, partitioning an image to be detected, and evaluating the image blocks by taking the contrast as an index; step 3, extracting first-order statistical features of all residual images at corresponding positions of the selected blocks; step 4, combining the most significant features extracted from each residual image to form a final feature; 5, extracting features of the group of original images and the group of copied images, inputting the features into a support vector machine, and training a classifier; and step 6, for any to-be-detected image, after extracting the features, inputting the features into the classifier obtained by training, and determining whether the