1 #include <opencv2/core/core.hpp> 2 #include <opencv2/highgui/highgui.hpp> 3 #include <iostream> 4 5 using namespace std; 6 using namespace cv; 7 8 double alpha; /**< 控制对比度 */ 9 int beta; /**< 控制亮度 */ 10 11 int main( int argc, char** argv ) 12 { 13 /// 读入用户提供的图像 14 Mat image = imread( argv[1] ); 15 Mat new_image = Mat::zeros( image.size(), image.type() ); 16 17 /// 初始化 18 cout << " Basic Linear Transforms " << endl; 19 cout << "-------------------------" << endl; 20 cout << "* Enter the alpha value [1.0-3.0]: "; 21 cin >> alpha; 22 cout << "* Enter the beta value [0-100]: "; 23 cin >> beta; 24 25 /// 执行运算 new_image(i,j) = alpha*image(i,j) + beta 26 for( int y = 0; y < image.rows; y++ ) 27 { 28 for( int x = 0; x < image.cols; x++ ) 29 { 30 for( int c = 0; c < 3; c++ ) 31 { 32 new_image.at<Vec3b>(y,x)[c] = saturate_cast<uchar>( alpha*( image.at<Vec3b>(y,x)[c] ) + beta ); 33 } 34 } 35 } 36 37 /// 创建窗口 38 namedWindow("Original Image", 1); 39 namedWindow("New Image", 1); 40 41 /// 显示图像 42 imshow("Original Image", image); 43 imshow("New Image", new_image); 44 45 /// 等待用户按键 46 waitKey(); 47 return 0; 48 }
