Certificate positioning method, device and equipment and storage medium

A positioning method and certificate technology, applied in the field of image processing, can solve problems such as high false detection rate, easy to be affected by complex environments, unstable positioning results, etc., and achieve high accuracy

Pending Publication Date: 2021-09-21
PING AN BANK CO LTD
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  • Abstract
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Problems solved by technology

[0003] At present, the methods for document location include: document location based on traditional machine learning method Adaboost, document location based on integral graph, ca

Method used

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  • Certificate positioning method, device and equipment and storage medium
  • Certificate positioning method, device and equipment and storage medium
  • Certificate positioning method, device and equipment and storage medium

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] It should be noted that the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features . Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one...

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Abstract

The invention relates to an image processing technology, and discloses a certificate positioning method, device and equipment and a storage medium, and the method comprises the steps of marking the vertex coordinates of a certificate frame in a certificate sample image, and respectively generating a first thermodynamic diagram, a first scale mapping diagram and a first center offset diagram; performing prediction processing on the certificate sample image by using a pre-constructed certificate positioning model, and respectively obtaining a second thermodynamic diagram, a second scale mapping diagram and a second center offset diagram which are obtained by prediction; calculating a first loss value, a second loss value and a third loss value; calculating a loss sum according to a loss formula; performing repeated iteration training on the certificate positioning model, recalculating the loss sum, and when the loss sum is smaller than a preset threshold value, obtaining a standard certificate positioning model; and positioning the to-be-positioned certificate image by using the standard certificate positioning model to obtain a certificate frame in the to-be-positioned certificate image. According to the invention, the certificate frame can be accurately positioned from the certificate image with a complex background.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a certificate positioning method, device, equipment and storage medium. Background technique [0002] Documents are very active traffic data, and electronic documents can improve the speed of business processing. The document images uploaded in each system are of various types and the quality is uneven. Among them, there are many reflections and blurred document images caused by light spots and external dim light. If you directly evaluate the quality of the entire document image, the background outside the area of ​​the document will easily affect it and give a misjudgment result, which brings difficulties to the identification of the document. Therefore, it is necessary to locate the document before performing quality assessment on the document image. area is very necessary. [0003] At present, the methods for document location include: document location base...

Claims

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Application Information

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IPC IPC(8): G06K9/32
Inventor 洪叁亮
Owner PING AN BANK CO LTD
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