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cv.imdecode and cv.cvtColor Fail in OpenCV 4.10.0 with Valid Numpy Array #1114

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@william-mx

Description

@william-mx

System Information

OpenCV python version: 4.10.0.84
Operating System / Platform: Windows 11
Python version: 3.12.2

Detailed description

The cv.cvtColor function throws an error when trying to convert a numpy array from RGB to BGR in OpenCV version 4.10.0.84. The same code works fine with OpenCV version 4.5.5.62.

Overload resolution failed:

  • src is not a numpy array, neither a scalar
  • Expected Ptrcv::UMat for argument 'src'

Steps to reproduce

import numpy as np
import cv2 as cv

Create a simple test image

test_image = np.zeros((100, 100, 3), dtype=np.uint8)

Attempt to convert the image from RGB to BGR

test_image_bgr = cv.cvtColor(test_image, cv.COLOR_RGB2BGR)

Issue submission checklist

  • I report the issue, it's not a question
  • I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution
  • I updated to the latest OpenCV version and the issue is still there
  • There is reproducer code and related data files (videos, images, onnx, etc)

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