基于中值滤波的手指静脉图像增强

Image Enhancement of Finger-vein Patterns based on Median Filtering

提出了一种基于中值滤波的手指静脉图像增强方法,本算法包括去噪、对比度增强和高通滤波增强.中值滤波在去除图像噪声的同时较好地保护了图像所包含的边缘信息,对比度增强加大了血管和背景的整体对比度,最后的高通滤波增强进一步增强了血管和组织的纹理结构.实验表明,本算法不但对图像去噪效果好,而且能有效地增强图像的对比度,改善图像的质量.

A method to enhance the finger-vein image fine structure and the whole contrast was proposed based on median filtering. The method includes denoising, contrast enhancement, and highpass filtering enhanced method. Median filtering can filter the noise of the image and better protect the information contained in the edge of image; contrast enhancement is adopted to enlarge the contrast of image; the finger-vein was enhanced and fine structures was improved by using high-pass filtering method. The experimental results show that this method is effective.