Research Of ID Card Character Recognition Algorithm And Software Design Based On Image Matching

ID card is the most important papers to certify the holder’s identity and it has been widely used in telecom industry, banking, police, mobile industry and many other industries. With the development of information technology, all walks of life have entered the digital information age, in order to improve every work of life’s informatization level, automatic certification of identity has become an urgent need. Therefore, how to use image processing and character recognition technology to recognize ID card’s personal information automaticly, completely, efficiently as well as realize the corresponding management and verification is very important.Image matching method based on feature points is divided into three steps: feature extraction, feature description and feature matching. In this paper, the BOW model is selected to represent the character image, the uniform grid feature, LBP feature and HOG algorithm are selected to extract visual vocabulary in different character images, the KMeans clustering algorithm is selected to merge the same word sense of the visual vocabulary and structure a code containing a number of words, the SPM spatial pyramid method is selected to divide character image into fine rigid with different resolution and concatenate each rigid’s feature into one vector, then capture the character image’s feature code by the word vocabulary, the matching result is the character image who has the minimum distance between its’ feature code and the character image’s feature code. Compared to the general image matching method based on feature points, the proposed algorithm has higher recognition accuracy on Chinese character.ID character recognition software is written in C ++ and MFC, vs2010 is the development environment and 64-bit win7 system is the runtime environment. Software modules includes: image reprocessing(graying, binaryzation, sub-section), character segmentation(get a single character image), pre-identification(recognize the number or letter which maybe included in the address bar), normalization, character recognition(getting the recognition result), verification(compare the recognition results with the personal information stored in ID card).In this paper, the ID card character recognition software can segment and recognize the character according to ID card’s personal information. It can also recognize the ID holder’s information completely, rapidly, effectively and then compare with certificate chip information to identify the authenticity of the ID card.