Seal image recognition and classification method and device, computer equipment and storage medium

Abstract

The invention relates to a seal image recognition and classification method and device, computer equipment and a storage medium. According to the invention, different seals are classified based on the rotation change condition of the circumscribed rectangles of the seal connected domain; and meanwhile, correction processing of the seal is achieved. Compared with a traditional classification method based on edge detection, the invention does not need to carry out collection training on prior data; the classification process is simplified, implementation is easy, and the efficiency of stamp image classification is further improved. The method comprises the following steps: acquiring an image containing a seal; solving a seal connected domain for a seal area in the image; rotating the seal connected domain for multiple times at a preset angle in a fixed direction, and solving the circumscribed rectangles of the rotated seal connected domain each time to obtain a plurality of circumscribed rectangles; calculating the area of each external rectangle; and classifying the seals according to the size relation of the areas of all the external rectangles.

Description

technical field [0001] The present application relates to the technical field of image recognition, in particular to a stamp image recognition and classification method, device, computer equipment and storage medium. Background technique [0002] With the development of the digital age of information, information that is traditionally recorded in valuable documents is quickly converted and stored with digital technology. For example, the scanning of valuable documents such as invoices, deposit receipts and checks used in daily life, in order to ensure the authenticity of the entered documents, the valuable documents are generally checked for counterfeiting, and the seal is one of the important anti-counterfeiting information, and the verification of the seal, It is a necessary condition to prove the authenticity of valuable documents. [0003] At present, the seals on valuable documents are generally divided into square seals and round seals. Generally speaking, the method...

AI Technical Summary

Problems solved by technology

[0004] However, because most of the stamps are manually operated, this will cause the handwriting and outline of the stamp on the valuable document to be random, which brings difficulties for subsequent seal verification

Because the edge of the seal may be incomplete or inconsistent in depth, the geometric characteristics of the square and round seals are not easy to extract and classify

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