The current mainly circulated HKD is various,so it takes a way of detecting safewire and algorithm of angle image matching based on 8-direction gradient feature under infrared image to distinguish the layout information including denomination,version and direction of the banknote.In the experiments,by the extensive testing,the recognition rate of the layout information reaches a considerable degree.%由于现行流通的主要港币种类纷繁复杂,选择在港币的红外图像上,采用纸币安全线检测方法和基于八向特征提取的角图像匹配算法,进行港币版面信息(面额、版本以及方向等信息)的识别.在实验中,经过了大量测试,纸币的版面信息识别率达到了可观的程度.
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