Opencv 图像增强和亮度调整<6>

图像处理算子是带有一幅或多幅输入图像、产生一幅输出图像的函数。

图像变换可分为以下两种：点算子（像素变换）邻域算子

图像增强和亮度调整属于像素变换范畴常见变换方法是：

其中 i 和 j属于行和列

#define WIN_NAME "输出图像"
Mat srcImage;
Mat dstImage;
int contrast = 20, bright = 20;
void onChange(int, void*)
{
 for (int i = 0; i < srcImage.rows; i++)
 {
  for (int j = 0; j < srcImage.cols; j++)
  {
   //也可以用for循环
   dstImage.at<Vec3b>(i, j)[0] = saturate_cast<uchar>(srcImage.at<Vec3b>(i, j)[0] * contrast*0.01 + bright);
   dstImage.at<Vec3b>(i, j)[1] = saturate_cast<uchar>(srcImage.at<Vec3b>(i, j)[1] * contrast*0.01 + bright);
   dstImage.at<Vec3b>(i, j)[2] = saturate_cast<uchar>(srcImage.at<Vec3b>(i, j)[2] * contrast*0.01 + bright);
  }
 }
// srcImage.convertTo(dstImage, -1, 0.01, 20);
 imshow("原图", srcImage);
 imshow(WIN_NAME, dstImage);
}
void main()
{
 srcImage = imread("E:\欣奕华\项目\OPENCV\ContrastBright\ConBrightness\1.jpg", 1);
 dstImage.create(srcImage.size(), srcImage.type());
 namedWindow(WIN_NAME, WINDOW_AUTOSIZE);
 createTrackbar("对比度", WIN_NAME, &contrast, 200, onChange, 0);
 createTrackbar("亮  度", WIN_NAME, &bright, 200, onChange, 0);
 onChange(contrast, 0);//回调函数初始化
 onChange(bright, 0);
 waitKey();
}