cv2.applyColorMap got different result shape between 4.x and 5.x
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Description
import numpy as np
import cv2
colors = cv2.applyColorMap(np.array([0, 63, 127, 191, 255], dtype=np.uint8), cv2.COLORMAP_PARULA)
print('shape', colors.shape)
opencv-python 4.x got shape (5, 1, 3)
# pip list | grep -e cv -e numpy
numpy 2.4.6
opencv-python 4.13.0.92
Python version 3.11.9
opencv-python 5.x got shape (1, 5, 3)
# pip list | grep -e cv -e numpy
numpy 2.4.6
opencv-python 5.0.0.93
Python version 3.11.9
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Research direction
Start by running the provided cv2.applyColorMap snippet with the reported opencv-python 4.x and 5.x versions, then inspect the package or upstream entry point responsible for this behavior. Compare the resulting shape against existing tests or project guidance; done means the version difference is resolved or its intended behavior is clearly documented with regression coverage.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- opencv, python
- Domain
- computer-vision
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Active
- Clarity
- Mostly clear
- Newbie friendliness
- 55/100