为了提取图像轮廓，运用snake算子，提取轮廓。 为了提取图像轮廓，运用snake算子，提取轮廓-In order to extract image contours, the use of snake operator to extract contours. In order to extract image contours, the use of snake operator, contour extraction

基于opencv的图像检索系统，提取颜色特征和轮廓特征进行检索-Image retri system based on OpenCV, the extraction of color features and contour feature extraction