Abstract: This paper discusses the extraction and matchingof fingerprint's features, using the 8-Neighborhoods algorithm to gainthe endpoint' scharacteristicsof fingerprint, and in the meantimeproposes the triangular fingerprint matching algorithm based on the similar ridge line. The kernel of this algorithm is constructing vector triangles and further matching them according to all the extractedendpoints and bifurcationsof the extractedfcatures. Firstly, matching the similar ridge line based on the extracted endpoints, finding the matching endpoints, and then performingthe triangleon similarly matching purpose. I}his algorithm effectively reduces the number of matching triangles and accordingly accele-rates the matching speed. Finally, using Matlab put the fingerprint identification system into practice. The results show that the algorithm is able to achieve a certain degree of recognition.

Key words: Fingerprint, Similar, Ridge line, Matching