#include <opencv2\opencv.hpp>
#include <iostream>
using namespace cv;
using namespace std;
int main(int argc, char** argv)
{
Mat src,gray_src ;
src = imread("C:\\Users\\89899\\Desktop\\OHR.TengbocheMonastery_ZH-CN7555740661_1920x1080.jpg");
namedWindow("input", CV_WINDOW_AUTOSIZE);
imshow("input", src);
cvtColor(src, gray_src, CV_BGR2GRAY);//将RGB转换为单通道图像,即转化为灰度图像
int hight = gray_src.rows;
int width = gray_src.cols;
namedWindow("output", CV_WINDOW_AUTOSIZE);
imshow("output", gray_src);
imwrite("C:\\Users\\89899\\Desktop\\output.jpg", gray_src);
//单通道反差,
for(int row =0;row<hight;row++)
for (int col = 0; col < width; col++) {
int gray = gray_src.at<uchar>(row, col);
gray_src.at<uchar>(row, col) = 255 - gray;
}
namedWindow("change", CV_WINDOW_AUTOSIZE);
imshow("change", gray_src);
imwrite("C:\\Users\\89899\\Desktop\\change.jpg", gray_src);
//三通道反差
Mat dst;
dst.create(src.size(), src.type());
hight = src.rows;
width = src.cols;
int nc = src.channels();
for (int row = 0; row < hight; row++) {
for (int col = 0; col < width; col++) {
if (nc == 1) {
int gray = gray_src.at<uchar>(row, col);
gray_src.at<uchar>(row, col) = 255 - gray;
}
else if (nc == 3) {
int b = src.at<Vec3b>(row, col)[0];
int g = src.at<Vec3b>(row, col)[1];
int r = src.at<Vec3b>(row, col)[2];
dst.at<Vec3b>(row, col)[0] = 255 - b;
dst.at<Vec3b>(row, col)[1] = 255 - g;
dst.at<Vec3b>(row, col)[2] = 0;
}
}
}
imshow("yaoyang", dst);
imwrite("C:\\Users\\89899\\Desktop\\yaoyang.jpg", dst);
imshow("空白", Scalar(0));
waitKey(0);
return 0;
}
公众号上记录,我的opencv学习历程,小白起步
来源:CSDN
作者:captionyao
链接:https://blog.csdn.net/qq_38436175/article/details/103795893