# How to calculate the angle relative to the camera - python

Hi, I'm using python to write a head pose estimation program. I saw all the demos and other projects online but I couldn't understand how to find the angles of the pitch, yaw and roll, relative to the camera. I used to project 3 axes on a frame using cv2.drawFrameAxes function (so I do have the vectors and camera calibration) but I need to get an angle (0 degrees, 15, 45, etc).

Thank you for your help and time, Anthon.

Update: I've posted a solution but it seems that the solution doesn't appear. I'm linking a similar solution that takes the rotation vector from SolvePnP. https://answers.opencv.org/question/1... I haven't tested this solution.

so you should be close to what you want now. please show your code, so we can hook into it

Hi, my code (the head pose part) is similar to: https://github.com/yinguobing/head-po... if you go to estimate_head_pose.py, you will see that they provide 3 options to project the results on the frame. The last commented option is drawing 3 axes. So how can I use the rotation and translation vector to calculate the 3 angles. Thank you for your time and effort. It's really appreciate.

that's quite useless. we won't try to parse a 3rdparty github repo, trying to understand, what YOU did

hello, thank you for your time. I've found the solution I've been looking for. Next time I will post my code strait away.