opencv & qt study - (4) - 使用imwrite写图像文件

#include <QCoreApplication> #include <opencv2/core/core.hpp> #include <opencv2/opencv.hpp> using namespace cv; void imwrite_test() { bool sign = true; Mat image = imread("F:/images/group.jpg"); Mat result; cv::cvtColor(image,result,CV_BGR2GRAY);//把彩色转换为灰度图 sign = imwrite("F:/images/grount_gray.jpg",result); //保存图像 if(sign != true) { return; } cv::namedWindow("image"); cv::imshow("image",image); cv::namedWindow("result"); cv::imshow("result",result); } int main(int argc, char *argv[]) { QCoreApplication a(argc, argv); imwrite_test(); return a.exec(); }