Abstract: We proposed a new method to enhance the contrast of the finger-vein image. The method consists of three parts: wavelet denoising, contrast enhancement and binary image. In wavelet denosing, we made use of the different characteristics of each frequency band and finger-vein after wavelet transform to design different methods of denosing. In contrast enhancement, we designed histogram template equalization method. With the aid of this method, the contrast of the finger-vein image can be properly enhanced. In binary image, we just used the OTSU method. The experimental results show that our method is effective.

Key words: image enhancement, wavelet transform, fingervein image