Physical Sciences and Mathematics Commons^™

A Model-Based Approach For Compression Of Fingerprint Images, Fikret Erçal, M. Gokmen, Ilker Ersoy

Computer Science Faculty Research & Creative Works

We propose a new fingerprint image compression scheme based on the hybrid model of an image. Our scheme uses the essential steps of a typical automated fingerprint identification system (AFIS) such as enhancement, binarization and thinning to encode fingerprint images. The decoding process is based on reconstructing a hybrid surface by using the gray values on ridges and valleys. In this compression scheme, the ridge skeleton is coded efficiently by using differential chain codes. The valley skeleton is derived from the ridge skeleton and the gray values along the ridge and valley skeletons are encoded using the discrete cosine transform. …