Merge pull request #10536 from Sahloul:bug_fix/BLOB

7 years ago · e3a6d74945
parent dd3c1d3b8c 2d2499f610
commit e3a6d74945
1 changed files with 1 additions and 1 deletions
--- a/modules/features2d/src/blobdetector.cpp
+++ b/modules/features2d/src/blobdetector.cpp
@ -311,7 +311,7 @@ void SimpleBlobDetectorImpl::detect(InputArray image, std::vector<cv::KeyPoint>&
    //TODO: support mask
    keypoints.clear();
    Mat grayscaleImage;
-    if (image.channels() == 3)
+    if (image.channels() == 3 || image.channels() == 4)
        cvtColor(image, grayscaleImage, COLOR_BGR2GRAY);
    else
        grayscaleImage = image.getMat();