opencv矩形检测，采用金字塔方法，可以对多幅图同时检测。-opencv rectangle detection, using the pyramid method, can simultaneously detect pieces of map.

基于opencv的计算机视觉程序，优化图像，并通过霍夫变换寻找图像中的矩形。-Opencv based on computer vision programs, optimize the image, and Hough transform by finding the image rectangle.