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<>函数一
#include <opencv2/opencv.hpp> cv::Mat func(cv::Mat input) { input.setTo(0);
//input = cv::Mat::ones(4, 4, CV_32F); return input; } int main(int argc, char
const *argv[]) { cv::Mat imga = cv::imread("/home/ly/Pictures/11111111.jpg");
cv::Mat imgb = imga; cv::Mat imgc = imga.clone(); cv::Mat imgd = func(imga);
return 0; }
* imga 、imgb、imgd共享了矩阵头，当一个改变其他两个都改变。
* imgc深拷贝，完全独立，
<>函数二
#include <opencv2/opencv.hpp> cv::Mat func(cv::Mat input) { input =
cv::Mat::ones(4, 4, CV_32F); return input; } int main(int argc, char const
*argv[]) { cv::Mat imga = cv::imread("/home/ly/Pictures/11111111.jpg"); cv::Mat
imgb = imga; cv::Mat imgc = imga.clone(); cv::Mat imgd = func(imga); return 0; }
* imga、imgb共享局枕头，两个相互影响，由于在func中调用了构造函数，所以input会重新内存空间，那么imgd也独立
* imgc深拷贝，完全独立
