在opencv中检测一个图像是否有矩形，本程序很实用-An image in opencv detect whether the rectangle, the procedure is very useful

轮廓识别，矩形检测，同时也包含部分基于不变矩的最佳匹配代码-the code used to detect and redraw contours such as rectangle,it also include some code best match based on MCvHuMoments

Aforge.net开发的形状检测，能够自动化检测出图像中的三角形、圆形、矩形等形状-Aforge.net can detect the triangle and rectangle and etc.

简单的检测一幅图像中是否有正方形长方形圆及三角形，一幅图图像中可以有很多图形，但是竖直方向不能重合-Simple detect whether an image of a circle and a square rectangle triangle, a picture can have a lot of graphic images, but can not overlap in the vertical direction