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  • cv2.error: OpenCV(4.5.4) /tmp/pip-req-build-9vck9bv0/opencv/modules/highgui/src/window.cpp:1274: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa support. If you are on Ubuntu or Debian, in
  • NotImplementedError: The confidence keyword argument is only available if OpenCV is installed.
  • Could not build wheels for opencv-python which use PEP 517 and cannot be installed directly
  • cv2 not found
  • cv2.error: OpenCV(4.5.4)
  • OpenCV(4.5.5) D:\a\opencv-python\opencv-python\opencv\modules\objdetect\src\cascadedetect.cpp:1689: error: (-215:Assertion failed) !empty() in function 'cv::CascadeClassifier::detectMultiScale'
  • Package opencv was not found in the pkg-config search path. Perhaps you should add the directory containing `opencv.pc' to the PKG_CONFIG_PATH environment variable
  • ImportError: OpenCV loader: missing configuration file: ['config.py']. Check OpenCV installation.
  • cv2.error: OpenCV(4.5.5) /io/opencv/modules/imgproc/src/thresh.cpp:1555: error: (-2:Unspecified error) in function 'double cv::threshold(cv::InputArray, cv::OutputArray, double, double, int)' > THRESH_OTSU mode: > 'src_type == CV_8UC1 || src_type == C
  • OpenCV(4.5.4-dev) D:\a\opencv-python\opencv-python\opencv\modules\imgproc\src\resize.cpp:4051: error: (-215:Assertion failed) !ssize.empty() in function 'cv::resize'
  • Linking OpenCV with cmake . Adding the installation prefix of "OpenCV" to CMAKE_PREFIX_PATH doesn't work
  • WARNING: QA Issue: bgslibrary-dev rdepends on libopencv-imgproc, but it isn't a build dependency, missing opencv in DEPENDS or PACKAGECONFIG? [build-deps]
  • opencv(4.5.1) c:\users\appveyor\appdata\local\temp\1\pip-req-build-kh7iq4w7\opencv\modules\imgproc\src\resize.cpp:4051: error: (-215:assertion failed) !ssize.empty() in function
  • error: OpenCV(4.8.0) /io/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor' site:stackoverflow.com
  • global /tmp/pip-req-build-civioau0/opencv/modules/videoio/src/cap_v4l.cpp (587) autosetup_capture_mode_v4l2 VIDEOIO(V4L2:/dev/video0): device is busy
  • cv2.error: OpenCV(4.8.1) /Users/xperience/GHA-OpenCV-Python/_work/opencv-python/opencv-python/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor
  • cv2.error: OpenCV(4.3.0) /io/opencv/modules/imgproc/src/drawing.cpp:2374: error: (-215:Assertion failed) p.checkVector(2, CV_32S) >= 0 in function 'fillPoly'
  • cv2.error: OpenCV(4.5.3) C:\Users\runneradmin\AppData\Local\Temp\pip-req-build-q3d_8t8e\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'
  • opencv(4.4.0) c:\users\appveyor\appdata\local\temp\1\pip-req-build-71670poj\opencv\modules\imgproc\src\color.cpp:182: error: (-215:assertion failed) !_src.empty() in function 'cv::cvtcolor'
  • OpenCV(4.5.3) C:\Users\runneradmin\AppData\Local\Temp\pip-req-build-q3d_8t8e\opencv\modules\imgproc\src\shapedescr.cpp:315: error: (-215:Assertion failed) npoints >= 0 && (depth == CV_32F || depth == CV_32S) in function 'cv::contourArea'
  • cv2.error: OpenCV(4.5.2) .error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor' in command line
  • opencv(4.5.1) c:\users\appveyor\appdata\local\temp\1\pip-req-build-kh7iq4w7\opencv\modules\imgproc\src\resize.cpp:4051: error: (-215:assertion failed) !ssize.empty() in function 'cv::resize'
  • OpenCV" is considered to be NOT FOUND
  • OpenCV" is considered to be NOT FOUND
  • runtimeerror: abort(error: failed to install cocoapods dependencies for ios project, which is required by this template.
  • open cverror: (-215:Assertion failed) src.type() == CV_8UC1 in function 'cv::adaptiveThreshold'
  • opencv(4.4.0) c:\users\appveyor\appdata\local\temp\1\pip-req-build-71670poj\opencv\modules\imgproc\src\color.cpp:182: error: (-215:assertion failed) !_src.empty() in function
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