opencv上Gamma调节的源码

这周单位要做一个人脸美化的项目，查资料遇到这位大牛的博客，地址如下：点击打开链接

我的代码也是在他的基础上进行修改的，但是他对图像的RGB三个通道平等调节，为了适应我的需求，我改成了针对三个通道分别调节。废话不多说，开始上源码

  

   

    

     

    
    

     

      void ImageAdjust(Mat& src, Mat& dst,
     
    
   

    

     

    
    

     

       vector<double> low_in,
     
    
   

    

     

    
    

     

       vector<double> high_in,
     
    
   

    

     

    
    

     

       vector<double> low_out,
     
    
   

    

     

    
    

     

       vector<double> high_out,
     
    
   

    

     

    
    

     

       vector<double> gamma)
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

      	vector<double> low;
     
    
   

    

     

    
    

     

      	vector<double> high;
     
    
   

    

     

    
    

     

      	vector<double> bottom;
     
    
   

    

     

    
    

     

      	vector<double> top;
     
    
   

    

     

    
    

     

      	vector<double> err_in;
     
    
   

    

     

    
    

     

      	vector<double> err_out;
     
    
   

    

     

    
    

     
	int N = low_in.size();
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
	for (int i=0; i<N; i++)
     
    
   

    

     

    
    

     

      	{
     
    
   

    

     

    
    

     

      		low.push_back(low_in[i]*255);
     
    
   

    

     

    
    

     

      		high.push_back(high_in[i]*255);
     
    
   

    

     

    
    

     

      		bottom.push_back(low_out[i]*255);
     
    
   

    

     

    
    

     

      		top.push_back(high_out[i]*255);
     
    
   

    

     

    
    

     

      		err_in.push_back(high[i] - low[i]);
     
    
   

    

     

    
    

     

      		err_out.push_back(top[i] - bottom[i]);
     
    
   

    

     

    
    

     

      	}
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
    int x,y;
     
    
   

    

     

    
    

     

      	vector<double> val;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
    // intensity transform
     
    
   

    

     

    
    

     
    for( y = 0; y < src.rows; y++)
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     
        for (x = 0; x < src.cols; x++)
     
    
   

    

     

    
    

     

              {
     
    
   

    

     

    
    

     
            for (int i=0; i<N; i++)
     
    
   

    

     

    
    

     

                  {
     
    
   

    

     

    
    

     
				double val = (src.at<Vec3b>(y, x)[i]);
     
    
   

    

     

    
    

     

      				val = pow((val-low[i])/err_in[i], gamma[i])*err_out[i]+bottom[i]; // ☆
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
				if(val > 255) 
     
    
   

    

     

    
    

     

      					val = 255;
     
    
   

    

     

    
    

     
				if(val < 0) 
     
    
   

    

     

    
    

     

      					val = 0;
     
    
   

    

     

    
    

     

      				dst.at<Vec3b>(y, x)[i] = val;
     
    
   

    

     

    
    

     

                  }
     
    
   

    

     

    
    

     

              }
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      }
     
    
  
 

测试主函数：

  

   

    

     

    
    

     

      int _tmain(int argc, _TCHAR* argv[])
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

      	Mat src = imread("test.png",1);
     
    
   

    

     

    
    

     

      	Mat dst = Mat(src.size(), src.type());
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
	if (!src.empty())
     
    
   

    

     

    
    

     

      	{
     
    
   

    

     

    
    

     
		double a[] = {0.0, 0.0, 0.0};
     
    
   

    

     

    
    

     
		double b[] = {1.0, 1.0, 1.0};
     
    
   

    

     

    
    

     
		double c[] = {0.0, 0.0, 0.0};
     
    
   

    

     

    
    

     
		double d[] = {1.0, 1.0, 1.0};
     
    
   

    

     

    
    

     
		double e[] = {1.0, 1.0, 1.0};
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
		vector<double> low_in(a, a+3);
     
    
   

    

     

    
    

     
		vector<double> high_in(b, b+3);
     
    
   

    

     

    
    

     
		vector<double> low_out(c, c+3);
     
    
   

    

     

    
    

     
		vector<double> high_out(d, d+3);
     
    
   

    

     

    
    

     
		vector<double> gamma(e, e+3);
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
		ImageAdjust(src, dst, 
     
    
   

    

     

    
    

     

      			low_in, 
     
    
   

    

     

    
    

     

      			high_in, 
     
    
   

    

     

    
    

     

      			low_out, 
     
    
   

    

     

    
    

     

      			high_out, 
     
    
   

    

     

    
    

     

      			gamma
     
    
   

    

     

    
    

     

      			);
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
		imshow("src", src);
     
    
   

    

     

    
    

     
		imshow("dst", dst);
     
    
   

    

     

    
    

     
		waitKey(0);
     
    
   

    

     

    
    

     

      	}
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
    return 0;
     
    
   

    

     

    
    

     

      }
     
    
  
 

文章来源: panda1234lee.blog.csdn.net，作者：panda1234lee，版权归原作者所有，如需转载，请联系作者。

原文链接：panda1234lee.blog.csdn.net/article/details/26726241