Hello, I use opencv3.3.1 from ros-kinetic When executing this code
vector <vector <Point2i> > testContour; vector <Point2i> testedge; testedge.push_back(Point2i(240,240)); testedge.push_back(Point2i(120,240)); testedge.push_back(Point2i(120,120)); testedge.push_back(Point2i(240,120)); testContour.push_back(testedge); vector <Point2i> testedge2; testedge2.push_back(Point2i(200,200)); testedge2.push_back(Point2i(100,200)); testedge2.push_back(Point2i(100,100)); testedge2.push_back(Point2i(200,100)); testContour.push_back(testedge2); drawContours(image, edgeVector, -1,/*it->getColor()*/Scalar(255,255,255),CV_FILLED,LINE_8);
i get the following error:
OpenCV Error: Assertion failed (reader.ptr != __null) in cvDrawContours, file /tmp/binarydeb/ros-kinetic-opencv3-3.3.1/modules/imgproc/src/drawing.cpp, line 2603 terminate called after throwing an instance of 'cv::Exception' what(): /tmp/binarydeb/ros-kinetic-opencv3-3.3.1/modules/imgproc/src/drawing.cpp:2603: error: (-215) reader.ptr != __null in function cvDrawContours
now this only happens after updating the ros packages... before it ran fine.....
now i don't understand why exactly the reader.ptr() is __null, since my counturs vector is filled as u can see above, also google is quite emoty of that problem.
best regards, homes