基于图像处理的人民币碎片匹配定位

RMB fragment registration based on image processing

提出一种人民币碎片图像在基准图中匹配定位的方法。比较了基于灰度互相关法和基于Radon变换法两种不同的方法,并确定用基于灰度互相关法来获得碎片图像相对于基准图的旋转角度。基于灰度互相关法是将基准图在0°～360°间旋转,在每一度上获得碎片图和基准图的最大互相关系数,所有位置中的最大互相关系数所对应的旋转角度即为碎片图相对于基准图的旋转角度。探讨了获得最佳匹配旋转角度的最优搜索方法,在此基础上得到一种有实用价值的碎片图像匹配定位方法,可获得碎片图在基准图上的正确位置。

A kind of technique has been introduced for RMB fragment registration.Firstly,it compared two different methods about how to get the rotation angle value between the fragment and the reference image.One method is intensity-based correlation and another is Radon-based transforms.And finally the method of intensity-based correlation was adopted.The method of intensity-bawd correlation is related as follows:the reference image rotated 1° every time from 0° to 360°,at each position the RMB fragmentand the rotat...