OpenCV从入门到放弃系列之——图像的基本操作

读取、修改、保存图像

/*************************************************
*  Author: zhonghuasong
*  Email: zhonghsuestc@163.com
*  Create Time: 2016-12-03 15:03:00
************************************************/

#include <iostream>
#include <opencv/cv.h>
#include <opencv2/highgui.hpp>

using namespace cv;
using namespace std;

int main(int argc, char** argv) {
if (argc != 2) {
cout << "Usage: " << argv[0] << " <imagefile>" << endl;
}

char* imageName = argv[1];

Mat image;
image = imread(argv[1], CV_LOAD_IMAGE_COLOR);

if (!image.data) {
cout << "No image data" << endl;
return -1;
}

Mat gray_image;
cvtColor(image, gray_image, CV_BGR2GRAY);

imwrite("./Gray_Image.jpg", gray_image);

namedWindow(imageName, CV_WINDOW_AUTOSIZE);
namedWindow("Gray image", CV_WINDOW_AUTOSIZE);

imshow(imageName, image);
imshow("Gray image", gray_image);

waitKey(0);

return 0;
}