Opencv图片明暗处理



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

using namespace std;
using namespace cv;

//图片明暗处理
cv::Mat shadingTreatment(cv::Mat imgParam);

int main()
{
double alpha; //对比度
int beta; //亮度
//Mat image = imread("F:\\OpencvProject\\CamerasAndSurveillance201910\\x64\\Debug\\face_data\\20191025143712025.jpg");
Mat image = imread("D:\\images\\特朗普\\0.jpg");

if (image.empty())
{
return 0;
}

cv::Mat new_image = shadingTreatment(image);

/// 目标图像空间预分配
/// 显示图像
imshow("原图像", image);
imshow("新图像", new_image);


/// 等待键盘事件
waitKey(0);



return 0;
}


//图片明暗处理
cv::Mat shadingTreatment(cv::Mat imgParam)
{
Mat new_image = Mat::zeros(imgParam.size(), imgParam.type());


/// 输入初始化值
//cout << "请输入对比度1-3: ";
//cin >> alpha;
//cout << "请输入亮度1-100: ";
//cin >> beta;

double alpha = 1.2;
int beta = 50;
/// 执行变换 new_image(i,j) = alpha * image(i,j) + beta
for (int y = 0; y < imgParam.rows; y++)
{
for (int x = 0; x < imgParam.cols; x++)
{
for (int c = 0; c < 3; c++)
{
new_image.at<Vec3b>(y, x)[c] = saturate_cast<uchar>(alpha * (imgParam.at<Vec3b>(y, x)[c]) + beta);
}
}
}

return new_image;
}


Opencv图片明暗处理_图像空间