Merge pull request #3719 from theodr:document_findnonzero_function
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@ -545,8 +545,31 @@ The function returns the number of non-zero elements in src :
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CV_EXPORTS_W int countNonZero( InputArray src );
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CV_EXPORTS_W int countNonZero( InputArray src );
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/** @brief returns the list of locations of non-zero pixels
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/** @brief Returns the list of locations of non-zero pixels
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@todo document
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Given a binary matrix (likely returned from an operation such
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as threshold(), compare(), >, ==, etc, return all of
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the non-zero indices as a cv::Mat or std::vector<cv::Point> (x,y)
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For example:
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@code{.cpp}
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cv::Mat binaryImage; // input, binary image
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cv::Mat locations; // output, locations of non-zero pixels
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cv::findNonZero(binaryImage, locations);
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// access pixel coordinates
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Point pnt = locations.at<Point>(i);
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@endcode
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or
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@code{.cpp}
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cv::Mat binaryImage; // input, binary image
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vector<Point> locations; // output, locations of non-zero pixels
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cv::findNonZero(binaryImage, locations);
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// access pixel coordinates
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Point pnt = locations[i];
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@endcode
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@param src single-channel array (type CV_8UC1)
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@param idx the output array, type of cv::Mat or std::vector<Point>, corresponding to non-zero indices in the input
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*/
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*/
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CV_EXPORTS_W void findNonZero( InputArray src, OutputArray idx );
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CV_EXPORTS_W void findNonZero( InputArray src, OutputArray idx );
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