New template thinning method for fingerprint image
一种新的指纹图像模板细化方法

OPTA method is a classical thinning method for fingerprint image.Improved OPTA method,which was proposed to overcome the insufficiency of OPTA method,could obtain a complete thinning result,and could eliminate the distortion of the skeleton.But the above two template thinning methods had the deficiency of being easy to get burrs after thinning for the cause of thinning direction of the templates was not detail.In order to deal with this problem,this paper proposed a set of 16-direction thinning templates.New method uses 22.5 degrees as an angle unit to process image meticulously.The results show that thinned image is smooth and almost not has any burrs,more ideal thinning effect is obtained.