Irrelevant technique method of image pickup device in fingerprint recognition algorithm

The invention relates to an irrelative technique of image collector in fingerprint recognize algorism, wherein it comprises: image collector irrelative technique of character extract algorism and image collector irrelative of fingerprint matching algorism, while the image obtained in first step will be matched by second step; the first step uses large-window frequency analysis algorism, to realize self-adaptive selection of block size; the second image collector irrelative of fingerprint matching algorism uses triangle method to calculate the ratio between two fingerprint character modes. The invention can apply one fingerprint recognize algorism to different fingerprint collectors, to improve the application of fingerprint recognize algorism.