findContours: integrate workaroung to allow contours detection on image border

8 years ago · 1f4f50b9dc
parent 2038434c7e
commit 1f4f50b9dc
1 changed files with 3 additions and 2 deletions
--- a/modules/imgproc/src/contours.cpp
+++ b/modules/imgproc/src/contours.cpp
@ -1878,13 +1878,14 @@ void cv::findContours( InputOutputArray _image, OutputArrayOfArrays _contours,

    CV_Assert(_contours.empty() || (_contours.channels() == 2 && _contours.depth() == CV_32S));

-    Mat image = _image.getMat();
+    Mat image;
+    copyMakeBorder(_image, image, 1, 1, 1, 1, BORDER_CONSTANT, Scalar(0));
    MemStorage storage(cvCreateMemStorage());
    CvMat _cimage = image;
    CvSeq* _ccontours = 0;
    if( _hierarchy.needed() )
        _hierarchy.clear();
-    cvFindContours(&_cimage, storage, &_ccontours, sizeof(CvContour), mode, method, offset);
+    cvFindContours(&_cimage, storage, &_ccontours, sizeof(CvContour), mode, method, offset + Point(-1, -1));
    if( !_ccontours )
    {
        _contours.clear();