解決策。cv2.error: OpenCV(4.6.0) D:\a\opencv-python\opencv-python\opencv\modules\flann\src\miniflann.cpp:336: error: (-210:Unsupported format or combination of formats) in function 'cv::flann::buildIndex_' エラー 環境 windows10 python3.7 opencv-python4.6.0 エラー 解決策。cv2.error: OpenCV(4.6.0) D:\a\opencv-python\…