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Merge pull request #6068 from StevenPuttemans:add_at_matrix_info

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Alexander Alekhin 2016-02-05 14:03:22 +00:00
commit e04f372083
1 changed files with 8 additions and 0 deletions
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8
modules/core/include/opencv2/core/mat.hpp
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@ -1702,6 +1702,14 @@ public:
for(int j = 0; j < H.cols; j++)
H.at<double>(i,j)=1./(i+j+1);
@endcode
Keep in mind that the size identifier used in the at operator cannot be chosen at random. It depends
on the image from which you are trying to retrieve the data. The table below gives a better insight in this:
- If matrix is of type `CV_8U` or `CV_8S` then use `Mat.at<uchar>(y,x)`.
- If matrix is of type `CV_16U` or `CV_16S` then use `Mat.at<ushort>(y,x)`.
- If matrix is of type `CV_32S` or `CV_32F` then use `Mat.at<float>(y,x)`.
- If matrix is of type `CV_64FU` then use `Mat.at<double>(y,x)`.
@param i0 Index along the dimension 0
*/
template<typename _Tp> _Tp& at(int i0=0);