基于多尺度gabor滤波的造影血管中轴线自动提取，利用多尺度gabor滤波灵活的频率带宽和去除背景噪声-Gabor filter-based multi-scale imaging of vascular axis automatic extraction, use of a flexible multi-scale gabor filter frequency bandwidth and remove background noise

眼底照中血管去除函数,移除彩色眼底照中已经识别出来的血管(the function to remove bloold vessels)