对手指静脉原始图像进行预处理，进行图像定位与手指图像截取，进行归一化-The original image of the finger vein pretreatment for image positioning and finger image capture, normalized

matlab下的手指静脉图像预处理：均衡化，膨胀，腐蚀，细化，手指边缘检测，截取roi区域，尺度归一化以及灰度归一化。(Finger vein image preprocessing under matlab: equalization, expansion, corrosion, thinning, finger edge detection, interception of ROI region, scale normalization and gray normalization.)

结合图像处理MATLAB的基本原理和知识，详细介绍了手指静脉预处理，图像分割，静脉纹路分割，滤波去噪，细化等相关内容。(Combined with the basic principle and knowledge of image processing, this paper introduces the finger vein pretreatment, image segmentation, vein vein segmentation, filtering and denoising,