码以载道

C++中引用导致的问题，如下ScanLIne(const cv::Mat& img_roi, const cv::Mat& cld_roi, cv::Mat& amimg_roi){// 如果这样写amimg_roi=img_roi;对amimg_roi修改，img_roi也会变化。}

关于opencv中的Mat::channels()函数，返回mat的通道数，如rgb图像为3，8位灰度图为1。但是用imread()函数读取灰度图和rgb图时，得到的mat的channels均为3。

findHomography()Mat cv::findHomography ( InputArray srcPoints,InputArray dstPoints,int method = 0,double ransacReprojThreshold = 3,OutputArray mask = noArray(),const int maxIters = 2000,const double confidence = 0.995)当srcPoints和dstPoints的值

ransac算法已经被重新定义在命名空间cv中，因此使用ransac时直接使用cv::RANSAC即可。

drawContours()void cv::drawContours ( InputOutputArray image,InputArrayOfArrays contours,int contourIdx,const Scalar & color,int thickness = 1,int lineType = LINE_8,InputArray hierarchy = noArray(),int maxLevel = INT_MAX,Point offset

An example program illustrates the use of cv::findContours and cv::drawContoursWindowsQtContoursOutput.pngScreenshot of the program#include “opencv2/imgproc.hpp”#include “opencv2/highgui.hpp”#include <math.h>#include using namespace cv;using

Erosion and Dilation sample codeMorphology_1_Tutorial_Erosion_Result.jpgSample Screenshot-ErosionMorphology_1_Tutorial_Dilation_Result.jpgSample Screenshot-DilationCheck the corresponding tutorial for more details#include “opencv2/imgproc.hpp”#inclu

1.彩色图像// 示例代码cv::Size smallSize;smallSize.height = h;smallSize.width = w;cv::Mat projImg = cv::Mat(smallSize, CV_8UC3, cv::Scalar(0, 0, 0));// 创建三通道黑色图像。cv::Mat projGreyImg = cv::Mat(smallSize, CV_8U, cv::Scalar(0));// 创建单通道黑色图像。 ... ... ...unsig