关键词: 手指静脉, 特征提取, 特征图像, 去噪

Abstract: Based on the configuration chacters of the finger vein image，this paper proposes an enhanced method for extracting finger vein features，the basic principle is to extract features by detecting concavity in gray image.Experiments proves that it is not only simpleness，easy to be achieved and adaptive，but also novelty by compareing traditional feature extraction algorithm.Effect of extracting finger vein features is very perfect，and extracting features is accurate，continuous and derivable meanwhile.

Key words: finger vein, feature extraction, feature image, de-noising