Image processing method for improving human-ID card comparison result
A comparison result and image processing technology, applied in the field of face recognition, can solve the problems of unstable face position, size, and impact on the results of witness comparison, so as to improve the accuracy of face comparison and reduce the impact. Effect
Inactive Publication Date: 2018-02-27
JIANGSU AEROSPACE DAWEI TECH CO LTD
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Problems solved by technology
Since the ID photo image in the ID card chip is a low-resolution photo, there is relatively little face feature information that can be extracted, which will affect the result of witness comparison
In addition, the position and size of the dynamically captured faces in the image are not fixed, which will also affect the results of witness comparison.
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[0018] The present invention will be further described below in conjunction with specific drawings and embodiments.
[0019] Improving the accuracy of witness comparison mainly includes two steps: preprocessing of face images, feature extraction and comparison of face images;
[0020] According to the current situation, to improve the accuracy of witness comparison, it is best to start with the preprocessing of face images. Under the condition of consistent witness comparison algorithms, the impact of external environmental factors on face feature extraction should be reduced as much as possible. The impact can improve the accuracy of witness comparison.
[0021] First, preprocess the ID photo image and the dynamically captured face image, including:
[0022] Perform translation transformation and rotation transformation on the dynamically captured face image to correct the position of the face in the image; then scale the ID photo image and the dynamically captured face imag...
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The invention provides an image processing method for improving a human-ID card comparison result. The image processing method includes the steps of firstly preprocessing an ID card photo image and adynamically captured human face image, including performing translation transformation and rotation transformation on the human face image to correct the position of a human face in the image, then performing scaling processing on the ID card photo image and the dynamically captured human face image; respectively performing face cutting on the ID card photo image and the dynamically captured humanface image and respectively converting them into grayscale images; performing histogram equalization; smoothing the two equalized human face grayscale images; performing binarization processing to obtain two binarized human face images; and then performing feature extraction and comparison on the human face images. The image processing method can reduce the influence of the external environment on the extraction of human face features.
Description
technical field [0001] The invention relates to the technical field of face recognition, in particular to an image processing method for improving the comparison result of witnesses and witnesses. Background technique [0002] Face recognition is an emerging biometric technology in today's society. With the continuous development, in order to quickly and effectively realize the requirements of automatic identity verification, face recognition combined with ID card reading technology has derived a witness comparison technology. Witness-to-evidence comparison technology refers to the process of collecting, processing, and comparing face information (referring to people's inherent physical characteristics such as face shape and facial image) with the photo image in the ID card chip by computer to identify personal identity. technology. Since the ID photo image in the ID card chip is a low-resolution photo, there is relatively little face feature information that can be extract...
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IPC IPC(8): G06K9/00G06K9/32G06T5/00G06T5/40G06T7/11
CPCG06T5/40G06T7/11G06V40/168G06V10/242G06T5/70
Inventor 何煜埕陈涛李家洪过陈晨林志
Owner JIANGSU AEROSPACE DAWEI TECH CO LTD