1）opencv.hpp 头文件：
#pragma once
#include <opencv.hpp>
using namespace std;
#include <opencv.hpp>
using namespace cv;
using namespace std;
class ColorInvert{
public :
void pixel_visit(Mat& image);
};
2）opencv.cpp 文件：
void ColorInvert::pixel_visit(Mat& image)
{
int w = image.cols;
int h = image.rows;
int dims = image.channels();
/*
for (int row = 0; row < h; row++)
{
for (int col = 0; col < w; col++)
{
if (dims == 1) {
int pv = image.at<uchar>(row, col);
image.at<uchar>(row, col) = 255 - pv;
}
if (dims == 3)
{
Vec3b bgr = image.at<Vec3b>(row, col);
image.at<Vec3b>(row, col)[0] = 255 - bgr[0];
image.at<Vec3b>(row, col)[1] = 255 - bgr[1];
image.at<Vec3b>(row, col)[2] = 255 - bgr[2];
}
}
}
*/
for (int row = 0; row < h; row++)
{
uchar* current_row = image.ptr<uchar>(row);
for (int col = 0; col < w; col++)
{
if (dims == 1) {
int pv = *current_row;
*current_row++ = 255 - pv;
}
if (dims == 3)
{
*current_row++ = 255 - *current_row;
*current_row++ = 255 - *current_row;
*current_row++ = 255 - *current_row;
}
}
}
imshow("像素读写演示", image);
}
3）main 函数：
#include <iostream>
#include <opencv.hpp>
#include "ColorInvert.h"
using namespace std;
using namespace cv;
int main()
{
Mat src = imread("E:/2024/Test/opencv/test2.png");
if (src.empty()) {
cout << "load pic fail" << endl;
return -1;
}
namedWindow("输入窗口", WINDOW_FREERATIO);
imshow("输入窗口", src);
ColorInvert coInvert;
coInvert.pixel_visit(src);
//coInvert.colorSpaceInvert(src);
waitKey(0);
destroyAllWindows();
}
显示结果如下：
