Method, device, medium and electronic device for preprocessing bill image
A technology for preprocessing and bills, applied in the fields of instrument, calculation, character and pattern recognition, etc., can solve the problems of complex bill layout and affect the accuracy of bills, and achieve the effect of improving accuracy, suppressing influence, and enhancing contrast.
Active Publication Date: 2022-07-19
泰康在线健康科技(武汉)有限公司
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Problems solved by technology
However, under normal circumstances, the layout of the bill is more complicated
For example, the face of a bill generally has at least two stamps (one is the pre-stamp of the bill, and the other is the individual or unit stamp), and these stamps may cover part of the text to be recognized, so when obtaining the information in the bill image, it may be due to These seals affect the accuracy of obtaining bills using OCR technology
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[0040] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be embodied in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
[0041] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present invention. However, those skilled in the art will appreciate that the technical solutions of the present invention may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be employed. In other instances, well-known methods...
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The invention provides a method for preprocessing a bill image, comprising: determining a variance matrix of the bill image in the three RGB channels according to the value of each pixel in the bill image in the three RGB channels; The value of the point in the three RGB channels is determined to determine the maximum value of each pixel in the three RGB channels in the ticket image; according to the maximum value of each pixel in the three The maximum value matrix of RGB three channels; and the preprocessed image of the bill is generated based on the variance matrix of the bill image in the RGB three channels and the maximum value matrix of the bill image in the RGB three channels, the preprocessed image generated in this way can be It greatly suppresses the influence of pre-printed words and seals on bills, and at the same time enhances the contrast of printed information in the stamping area, which is beneficial to improve the accuracy of bill text recognition algorithms. The invention also provides a preprocessing device, medium and electronic device for bill image.
Description
technical field [0001] The present invention relates to the technical field of bill image processing, in particular, to a method, device, medium and electronic device for preprocessing bill images. Background technique [0002] OCR technology is the abbreviation of Optical Character Recognition (Optical Character Recognition), which converts the text of various bills, newspapers, books, manuscripts and other printed materials into image information by scanning and other optical input methods, and then uses text recognition technology to convert the image information. Enter techniques for computers that can be used. For example, by using OCR technology, the information in the ticket can be obtained, and the second-level identification and extraction of the ticket information can be realized. However, usually the format of the ticket is more complicated. For example, the face of a bill generally has at least two seals (one is a pre-seal of the bill, and the other is a person...
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IPC IPC(8): G06V30/16
CPCG06V10/20
Inventor 马文伟王亚领张博熠刘设伟
Owner 泰康在线健康科技(武汉)有限公司