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Fix Python 2 bindings for findContours

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The sanity check prevents Python 2 from calling findContours, because the
Python 2 bindings pass an empty matrix for `_contours`. If `_contours` is not
empty, the channel and depth check should determine whether the matrix is of
the correct type and size.

Note: the Python 2 bindings passes a matrix of type `STD_VECTOR_MAT` to
parameters of the type `OutputArrayOfArrays`.
This commit is contained in:
Sander Mathijs van Veen
2014-07-26 16:40:09 +02:00
parent 7da0e37ba8
commit d25770ee76
1 changed files with 4 additions and 2 deletions
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6
modules/imgproc/src/contours.cpp
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@@ -1704,8 +1704,10 @@ void cv::findContours( InputOutputArray _image, OutputArrayOfArrays _contours,
OutputArray _hierarchy, int mode, int method, Point offset )
{
// Sanity check: output must be of type vector<vector<Point>>
CV_Assert( _contours.kind() == _InputArray::STD_VECTOR_VECTOR &&
_contours.channels() == 2 && _contours.depth() == CV_32S );
CV_Assert((_contours.kind() == _InputArray::STD_VECTOR_VECTOR || _contours.kind() == _InputArray::STD_VECTOR_MAT ||
_contours.kind() == _InputArray::STD_VECTOR_UMAT));
CV_Assert(_contours.empty() || (_contours.channels() == 2 && _contours.depth() == CV_32S));
Mat image = _image.getMat();
MemStorage storage(cvCreateMemStorage());