Opencv_C++(2）

#include<opencv2\opencv.hpp>
#include <iostream>

using namespace cv;
using namespace std;
int main(int argc, char** argv) {
	Mat src;
	src = imread("C:/Users/89899/Desktop/th.jpg");
	if (src.empty()) {
		cout << "there is no image " << endl;
		return -1;
	}
	namedWindow("001", CV_WINDOW_AUTOSIZE);
	imshow("001", src);

	/*src = Scalar(127, 0, 255);
	namedWindow("003", CV_WINDOW_AUTOSIZE);
	imshow("003", src);*/


	/*Mat dst;
	dst = Mat(src.size(), src.type());
	dst = Scalar(127, 0, 255);//红蓝绿，三个位置。可以创建纯色图像。
	namedWindow("002", CV_WINDOW_AUTOSIZE);
	imshow("002", dst);*/
	
	/*Mat dst;
	dst = src.clone();//clone生成完全一致的图片
	namedWindow("002", CV_WINDOW_AUTOSIZE);
	imshow("002", dst);*/

	/*Mat dst;
	src.copyTo(dst);//将src拷贝到dst中
	namedWindow("002", CV_WINDOW_AUTOSIZE);
	imshow("002", dst);*/
	Mat dst;
	namedWindow("output", CV_WINDOW_AUTOSIZE);
	/*cvtColor(src, dst, CV_BGR2BGRA);//CV_BGR2GRAY将第二位置的图像转换为灰度图。
	cout << "the channel of the input image is" << src.channels() << endl;
	cout << "the channel of the output image is " << dst.channels() << endl;*/

	Mat csrc;
	Mat kernel = (Mat_<float>(3, 3) << 0, -1, 0, -1, 5, -1, 0, -1, 0);
	filter2D(src, csrc,-1,kernel);

	
	imshow("output", csrc);
	waitKey(0);
	return 0;
}