Confusing notation

[kyuhyoung]

Thank you for making this codes public, first of all.

Why are there many codes such as following :

std::cout << "hand2eye ---\n" << hand2eye.matrix().inverse() << std::endl;

cv::Mat cv_object2eye = eigen2cvmat(object2eyes[i].inverse().matrix());

Shouldn't be the inverse of A2B B2A ?