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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);