the error message is ""OpenCV(3.4.2) c:\miniconda3\conda-bld\opencv-suite_1534379934306\work\modules\imgproc\src\color.hpp:253: error: (-215:Assertion failed) VScn::contains(scn) && VDcn::contains(dcn) && VDepth::contains(depth) in function 'cv::CvtHelper<struct cv::set<3,4,-1="">,struct cv::Set<3,4,-1>,struct cv::Set<0,2,5>,2>::CvtHelper'""
and the code is ...
path = "F:/New folder"
hand_picturs = [] for i in range(6): hands_pic = cv2.cvtColor(cv2.imread(path + str(i) + ".jpg"), cv2.COLOR_BGR2RGB) hand_picturs.append(hands_pic)