I'm trying to retrieve the position of my matched object, I'm using this tutorial https://docs.opencv.org/3.4.1/d7/dff/tutorial_feature_homography.html
So far my code is https://gist.github.com/Menuka5/de971b86d5260b1b9080ca3a7b541446
Instead FlannBasedMatcher which is given in the tutorial I use BFMatcher with NORM_L2.
Problem is when I go to perspectiveTransform it gives an error like below.
I have no idea what makes the cv::Exception? Please help