Document image copying detection method and device, computer equipment and storage medium

Abstract

The embodiment of the invention belongs to the field of image processing, is applied to the field of smart government affairs, and relates to a document image copying detection method, which comprisesthe steps of performing sampling processing on a document image to obtain a sampled image; filtering the sampled image to obtain a first document sub-image, a second document sub-image and a third document sub-image which are obtained through low-pass processing, horizontal high-pass processing and vertical high-pass processing respectively; integrating the first document sub-image, the second document sub-image and the third document sub-image to obtain a to-be-detected image; performing molar feature extraction on the to-be-detected image to obtain a first fixed length vector; and inputtingthe first fixed-length vector into a trained linear classifier, and outputting to obtain a copying detection result of the document image. In addition, the invention also relates to blockchain technology, and document images are also stored in the blockchain. The technical problem of reshooting and false detection in the prior art is solved.

Description

technical field [0001] The present application relates to the field of image processing, and in particular to a method, device, computer equipment, and storage medium for detection of copying of a document image. Background technique [0002] Reproduced images now refer to images obtained by taking pictures of computer screens or mobile phone screens, and the reproduced content is generally a paper document. In financial, insurance, government affairs and other businesses, due to the high risk of forgery and tampering in remake images, it is necessary to focus on verification and screening. The traditional remake detection algorithm needs to manually adjust the algorithm parameters according to the business scenario. This work requires high professional knowledge, and if the business scenario changes, it needs to be adjusted repeatedly, requiring repeated investment of large labor costs. There is also a general remake detection method, which identifies whether it is a remak...

AI Technical Summary

Problems solved by technology

[0003] Based on this, aiming at the above-mentioned technical problems, the present application provides a method, device, computer equipment and storage medium for detecting remakes of document images, so as to solve the problem of similarity between shading and moiré features that often appear in remakes in the prior art, which may easily lead to The technical problem of misdetection or missed detection by the general detection remake algorithm

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