创建亮度`

static void on_lightness(int b, void* userdata)
{Mat image = *((Mat*)userdata);dst = Mat::zeros(image.size(), image.type());;m = Mat::zeros(image.size(), image.type());addWeighted(image,1.0,m,0,b,dst);imshow("亮度与对比度调整",dst);
}

创建对比度

static void on_contrast(int b, void* userdata)
{Mat image = *((Mat*)userdata);Mat dst = Mat::zeros(image.size(), image.type());;Mat m = Mat::zeros(image.size(), image.type());double contrast = b / 100.0;addWeighted(image,contrast,m, 0.0, 0, dst);imshow("亮度与对比度调整", dst);
}

使用trackbar运行

namedWindow("亮度与对比度调整",WINDOW_AUTOSIZE);int lightness = 50;int max_value = 100;//调整亮度int contrast_value = 100.0;createTrackbar("Value Bar", "亮度与对比度调整",&lightness,max_value, on_lightness,(void*)(&image));createTrackbar("Contrast Bar", "亮度与对比度调整", &contrast_value, 200, on_contrast, (void*)(&image));on_lightness(50,&image);