关键词: 掌纹, 可撤销模板, 安全概略, Gabor滤波, 主成分分析

Abstract: It has become critical to improve the recognition rate and security of the palmprint templates. In this paper, a cancelable palmprint template generating algorithm is proposed based on the secure sketch. Firstly, palmprint image feature is acquired using multi-resolution and multi-orientation Gabor filters to transform palmprint image. Its dimension is reduced and feature vector is extracted by the Principal Component Analysis（PCA） algorithm. Then a cancelable palmprint template is generated based on secure sketch, which fuses encrypted feature vector and BCH codeword. Both theoretical analyses and experimental results show that the method not only achieves good recognition performance, but also fulfils revocability, diversity and non-invertibility. Even the single secret-key is stolen or shared, the recognition rate remains high.

Key words: palmprint, cancelable template, secure sketch, Gabor filter, Principal Component Analysis（PCA）