generic-library/opencv
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Merge pull request #6420 from ioxp:foreachDoc

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This commit is contained in:
Maksim Shabunin 2016-04-20 11:55:03 +00:00
commit ec63343f34
1 changed files with 8 additions and 9 deletions
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17
modules/core/include/opencv2/core/mat.hpp
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@ -1816,12 +1816,11 @@ public:
template<typename _Tp> MatIterator_<_Tp> end(); template<typename _Tp> MatIterator_<_Tp> end();
template<typename _Tp> MatConstIterator_<_Tp> end() const; template<typename _Tp> MatConstIterator_<_Tp> end() const;
/** @brief Invoke with arguments functor, and runs the functor over all matrix element. /** @brief Runs the given functor over all matrix elements in parallel.
The methods runs operation in parallel. Operation is passed by arguments. Operation have to be a The operation passed as argument has to be a function pointer, a function object or a lambda(C++11).
function pointer, a function object or a lambda(C++11).
All of below operation is equal. Put 0xFF to first channel of all matrix elements: Example 1. All of the operations below put 0xFF the first channel of all matrix elements:
@code @code
Mat image(1920, 1080, CV_8UC3); Mat image(1920, 1080, CV_8UC3);
typedef cv::Point3_<uint8_t> Pixel; typedef cv::Point3_<uint8_t> Pixel;
@ -1853,18 +1852,18 @@ public:
p.x = 255; p.x = 255;
}); });
@endcode @endcode
position parameter is index of current pixel: Example 2. Using the pixel's position:
@code @code
// Creating 3D matrix (255 x 255 x 255) typed uint8_t, // Creating 3D matrix (255 x 255 x 255) typed uint8_t
// and initialize all elements by the value which equals elements position. // and initialize all elements by the value which equals elements position.
// i.e. pixels (x,y,z) = (1,2,3) is (b,g,r) = (1,2,3). // i.e. pixels (x,y,z) = (1,2,3) is (b,g,r) = (1,2,3).
int sizes[] = { 255, 255, 255 }; int sizes[] = { 255, 255, 255 };
typedef cv::Point3_<uint8_t> Pixel; typedef cv::Point3_<uint8_t> Pixel;
Mat_<Pixel> image = Mat::zeros(3, sizes, CV_8UC3); Mat_<Pixel> image = Mat::zeros(3, sizes, CV_8UC3);
image.forEachWithPosition([&](Pixel& pixel, const int position[]) -> void{ image.forEach<Pixel>([&](Pixel& pixel, const int position[]) -> void {
pixel.x = position[0]; pixel.x = position[0];
pixel.y = position[1]; pixel.y = position[1];
pixel.z = position[2]; pixel.z = position[2];