我老师写的关于RGB格式图片提取线条的源代码，内容很详细，大家可以参考下。-my teacher wrote on the RGB format Photo extract lines of source code, the contents in detail, we can refer to the next.

边缘检测1.制作一张包括色块、线条的单色背景图片，先对其作低通滤波产生一幅色块和线条边缘模糊的降质图片待处理，采用任意二种边缘检测算法检测待处理图片中的色块和线条的边缘，得到二值化的处理结果图。从结果图中提取色块和线条的边界坐标值，与实际生成原始图像时采用的真实坐标数据作比较，对产生的检测误差作分析。2.拍摄一张包含待检测物体的黑白或者彩色照片，试采用一种边缘检测的算法做待检测物体的自动提取，对生成的结果作分析。-Edge Detection 1. To produce a including

将图片首先利用opencv转换为二值图像，突出线条，在进行图片线条提取、(First, the picture is converted to a two value image with a opencv, the line is highlighted, and the line extraction is performed.)