Identity card recognition method in complex scene based on OCR technology

Abstract

The invention discloses an identity card recognition method in a complex scene based on an OCR technology. The method comprises the steps: S1, carrying out the recognition of the feature points of anidentity card based on an SIFT algorithm, and determining the position coordinates of the identity card in a real scene; s2, performing positioning detection on a target area of the identity card in the real scene based on the obtained position coordinates of the identity card, and determining a to-be-identified character area; s3, extracting text information in the to-be-identified text area; andS4, correcting the extracted text information to obtain accurate identity card information, and completing identity card recognition. The method solves the problems of positioning and recognition ofthe identity card in complex environments such as dark light, overexposure, fuzzy shooting and the like; the character minimum distance correction algorithm is added to the recognition result, so thatthe recognition accuracy is remarkably improved, a certain result error correction function is achieved, and the recognition result is more reliable.

Description

technical field [0001] The invention belongs to the technical field of ID card identification, and in particular relates to an ID card identification method in a complex scene based on OCR technology. Background technique [0002] With the development of society and the continuous improvement of the national credit system, more and more scenarios require identity verification, and the resident identity verification system has been widely used in all walks of life. If information such as ID card numbers and names are manually entered, the speed is slow, the user experience is poor, and the operator will suffer from visual fatigue. In order to improve the speed and accuracy of ID card information on mobile terminals, many Internet companies have developed ID card character recognition technology. The existing technology uses OCR (Optical Character Recognition) technology to analyze and manage images and text information, and its application scenarios are often run in a relati...

AI Technical Summary

Problems solved by technology

In the actual use scene, there are still some problems: First, there are shading and anti-counterfeiting reflective stripes on the background of the ID card. If there is an objective shooting environment such as uneven light intensity, it is difficult to accurately locate the position of the ID card in the image; secondly , the second-generation ID cards of different regions, different provinces, and different nationalities have problems such as various fonts, inconsistent font sizes, and poor positions; finally, the ID card shooting effect is not good due to human factors, such as arm shaking, angles, etc. Tilting, etc. may cause image blur

However, in real scenes, there is uneven illumination, which makes some characters unrecognizable, which will make it difficult to extract subsequent semantic information; for some special ID cards, such as ethnic minority ID cards, there will be ethnic minority languages ​​and characters. It is obviously unrealistic for a nation to develop an identification method, and there is no good solution yet

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