A Synthetically Thinning Algorithm for Fingerprint Image

Fingerprint image thinning is the operation to delete the width of ridge to one-pixel,which could improve the performance of automated fingerprint identification system(AFIS) effectively.Based on the advantages and disadvantages of OPTA algorithm and its variants,combined with the system requests on calculating velocity and resources of thinning algorithm,an improvement of quick thinning algorithm is proposed,which still contains the advantages of OPTA algorithm and could be used to get 8-connected thinned image.Experiments on FVC database showed the proposed algorithm could produce correct thinned image and have an effective velocity meeting the requirement of AFIS.