houghline transform, it it uses canny edge detection and hough transform. It then places a red line over any detected straight lines.

包括 颜色提取 形状提取，形状提取包括 Candy算子对边缘提取、  角点提取、 Hough直线提取-Including color extraction shape extraction, including  Candy shape extraction operator for edge detection,   corner extraction,  Hough lin

OpenCV中文参考手册.chm,本文档来源于OpenCV中文网站,常用的标准图 图像文件读入和显示 图像创建、保存和复制 Canny边缘检测 Canny边缘检测2 轮廓(contour)检测 轮廓(contour)检测2 图像旋转与缩放 读视频文件和运动问题检测 Hough线段检测 鼠标绘图 -OpenCV Chinese reference manual. Chm, this document comes from OpenCV C