SimpleBlobDetector is not created with FeatureDetector::create("SimpleBlob"); (Bug #2585)

Added by Vladimir Eremeev over 12 years ago. Updated about 12 years ago.

Status:Done Start date:2012-11-29
Priority:Normal Due date:
Assignee:Leonid Beynenson % Done:

0%
Category:features2d
Target version:2.4.4
Affected version:2.4.3 Operating System:
Difficulty: HW Platform:
Pull request:https://github.com/Itseez/opencv/pull/524

Description

The returned object has the obj and refcount fields set to 0.
Tracing in algorithm.cpp shows that the variable

static sorted_vector<string, Algorithm::Constructor> alglist_var;

Doesn't have entry "Feature2D.SimpleBlob"

Associated revisions

Revision 5600bc54
Added by Andrey Pavlenko almost 11 years ago

Merge pull request #2585 from ilya-lavrenov:norm

History

#1
Updated by Vladimir Eremeev over 12 years ago

Further studies show that file ${OpenCV_root}/features2d/src/features2d_init.cpp lacks any code, related to the SimpleBlob detector.
Since that alglist_var has no "SimpleBlob"

#2
Updated by Kirill Kornyakov over 12 years ago

Vladimir, thank you for the report! If you could fix the issue on your side, a patch or pull request would be highly appreciated!

  • Description changed from The returned object has the fields obj and refcount set to 0. Tracing in algo... to The returned object has the @obj@ and @refcount@ fields set to 0. Tracing in ... More
  • Target version set to 2.4.4

#3
Updated by Vladimir Eremeev over 12 years ago

Kirill Kornyakov wrote:

Vladimir, thank you for the report! If you could fix the issue on your side, a patch or pull request would be highly appreciated!

Ok, will try to do this asap.
First, I have to investigate how this works, in details.

Further investigation has revealed that this algorithm also doesn't support getters/setters from the class cv::Algorithm, the code crashes on the first call of detector->set(...)
That's because, this class doesn't create and fill AlgorithmInfo object.

#4
Updated by Vadim Pisarevsky about 12 years ago

  • Affected version set to 2.4.3
  • Target version deleted (2.4.4)

#5
Updated by Vadim Pisarevsky about 12 years ago

  • Assignee deleted (Maria Dimashova)

#6
Updated by Andrey Kamaev about 12 years ago

  • Assignee set to Leonid Beynenson

#7
Updated by Kirill Kornyakov about 12 years ago

  • Target version set to 2.4.4

#8
Updated by Amro _ about 12 years ago

It appears that the Pyramid adapter is also affected by this when combined with any of the other regular feature detectors mentioned in the docs

 Ptr<FeatureDetector> p = FeatureDetector::create("PyramidSTAR");

(OpenCV 2.4.3, VS2010)

#9
Updated by Amro _ about 12 years ago

Amro K wrote:

It appears that the Pyramid adapter is also affected by this when combined with any of the other regular feature detectors mentioned in the docs

[...]

(OpenCV 2.4.3, VS2010)

the problem occurred when accessing the created object (getting the name or using the read/write methods):

 cout << p->name() << endl;

(btw, for some reason I cant edit my previous comment..)

#10
Updated by Anna Kogan about 12 years ago

Hello Amro,
Thank you for reporting the problem. If you could fix the issue on your side, a patch or pull request in the GitHub repo: http://opencv.org/opencv-pull-requests-test-results.html would help a lot!

#11
Updated by Leonid Beynenson about 12 years ago

The bug is fixed (commit 0d12f45).

  • Pull request set to https://github.com/Itseez/opencv/pull/524
  • Status changed from Open to Done

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