Change in ArucoDetector return value in 4.13.0.90?

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
opencv, python
Domain
computer-vision

Research direction

Start with cwipc/cwipc_util/python/cwipc/registration/multicoarse.py at _find_aruco_in_image and compare the shape returned by ArucoDetector.detectMarkers across the reported version change. Check the release notes and relevant OpenCV ArUco API behavior; done means the return-value change or regression is identified and its expected handling is documented.

Written by the indexing model from the issue text.

Description

Since this morning the following code has started crashing:

corners, ids, rejected  = self.ARUCO_DETECTOR.detectMarkers(img)
# ...
if not ids is None:
  for i in range(len(ids)):
     rv_ids.append(int(ids[I]))

With error

  File ".../cwipc/cwipc_util/python/cwipc/registration/multicoarse.py", line 525, in _find_aruco_in_image
    rv_ids.append(int(ids[i]))
                  ^^^^^^^^^^^
TypeError: only 0-dimensional arrays can be converted to Python scalars

Has the return value of the ArucoDetector changed?

I have checked the release notes but I couldn't find anything...

Dominant language
Python
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Merged PRs (30d)
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