Some questions about ibvs

[paobuliao]

Hi! Thank you for your contribution to community, it really gives me a lot of help!
In 'ibvs.ipynb', I saw you have made reference to "Image-based visual servoing of a quadrotor using virtual camera approach". But after reading your code, I found your doesn't take the same image features as paper.
Recently, I am trying to replay the paper, but the outcome doesn't look good. So Could you give some suggestions about how to take image features and design control laws.
Sincerely looking for your reply!