• OpenCV学习笔记——疑问


    vec3b:表示每一个Vec3b对象中,可以存储3个char(字符型)数据,比如可以用这样的对象,去存储RGB图像中的一个像素点。typedef Vec<uchar, 3> Vec3b;

    卷积

    加权平均:各数值乘以相应的权数,然后加总求和得到总体值,再除以总的单位数。

    	exttt{dst} (x,y) =  sum _{ stackrel{0leq x' < 	exttt{kernel.cols},}{0leq y' < 	exttt{kernel.rows}} }  	exttt{kernel} (x',y')* 	exttt{src} (x+x'- 	exttt{anchor.x} ,y+y'- 	exttt{anchor.y} )

     1 void Sharpen(const Mat& myImage,Mat& Result)
     2 {
     3     CV_Assert(myImage.depth() == CV_8U);  // 仅接受uchar图像
     4 
     5     Result.create(myImage.size(),myImage.type());
     6     const int nChannels = myImage.channels();
     7 
     8     for(int j = 1 ; j < myImage.rows-1; ++j)
     9     {
    10         const uchar* previous = myImage.ptr<uchar>(j - 1);
    11         const uchar* current  = myImage.ptr<uchar>(j    );
    12         const uchar* next     = myImage.ptr<uchar>(j + 1);
    13 
    14         uchar* output = Result.ptr<uchar>(j);
    15 
    16         for(int i= nChannels;i < nChannels*(myImage.cols-1); ++i)
    17         {
    18             *output++ = saturate_cast<uchar>(5*current[i]
    19                          -current[i-nChannels] - current[i+nChannels] - previous[i] - next[i]);
    20         }
    21     }
    22 
    23     Result.row(0).setTo(Scalar(0));
    24     Result.row(Result.rows-1).setTo(Scalar(0));
    25     Result.col(0).setTo(Scalar(0));
    26     Result.col(Result.cols-1).setTo(Scalar(0));
    27 }

    data:

    核心函数LUT(The Core Function)

    ptr与at的区别

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  • 原文地址:https://www.cnblogs.com/JJJanepp/p/5646367.html
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