Performance Comparison of DCT and VQ Based Techniques for Iris Recognition

摘要

Iris recognition enjoys universality,high degree of uniqueness and moderate user co-operation.This makes iris recognition systems unavoidable in emerging security ＆ authentication mechanisms.An iris recognition system based on vector quantization （VQ） techniques is proposed and its performance is compared with the discrete cosine transform （DCT）.The proposed system does not need any pre-processing and segmentation of the iris.We have tested Linde-BuzoGray （LBG）,Kekre’s proportionate error （KPE） algorithm and Kekre’s fast codebook generation （KFCG） algorithm for the clustering purpose.Proposed vector quantization based method using KFCG requires 99.99% less computations as that of full 2-dimensional DCT.Further,the KFCG method gives better performance with the accuracy of 89.10% outperforming DCT that gives accuracy around 66.10%.