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adding documentation for the findnonzero() function

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theodore 2015-02-19 17:38:44 +01:00
parent 4a1adab9b4
commit 453f384bd7
1 changed files with 23 additions and 2 deletions
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25
modules/core/include/opencv2/core.hpp
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@ -545,8 +545,29 @@ The function returns the number of non-zero elements in src :
*/
CV_EXPORTS_W int countNonZero( InputArray src );
/** @brief returns the list of locations of non-zero pixels
@todo document
/** @brief Returns the list of locations of non-zero pixels
The function returns the coordinates of the location of non-zero pixels in src.
The result array can be both type of Mat or vector<Point>. For example:
@code{.cpp}
cv::Mat binaryImage; // input, binary image
cv::Mat locations; // output, locations of non-zero pixels
cv::findNonZero(binaryImage, locations);
// access pixel coordinates
Point pnt = locations.at<Point>(i);
@endcode
or
@code{.cpp}
cv::Mat binaryImage; // input, binary image
vector<Point> locations; // output, locations of non-zero pixels
cv::findNonZero(binaryImage, locations);
// access pixel coordinates
Point pnt = locations[i];
@endcode
@param src single-channel array
@param idx output array with the non-zero pixel points
*/
CV_EXPORTS_W void findNonZero( InputArray src, OutputArray idx );