CODEWITHSUNDEEP
opencvimage-processingcamerageometry
sam
sam

Reputation: 494

How should one find an angle of a head with respect to the camera?

I am working on a project which requires me to find the angle between the person's body w.r.t. the camera. I already have the pose coordinates of the person but I am not sure how to find the angle. Do you think I need to use some camera parameters such as focal length and Intrinsic parameters of the camera? I would appreciate your suggestions or any references. Thank you.

enter image description here The circle in the center is the person's head and the camera on the other side

Upvotes: 0

Views: 600

Answers (1)

Piotr Siekański
Piotr Siekański

Reputation: 1715

Try this link: https://www.learnopencv.com/head-pose-estimation-using-opencv-and-dlib/

To make long story short, you have to know the 3D coordinates of some points of the person and its 2D projections on the camera sensor plane and then use a PnP (Perspective-n-Point) alghoritm to estimate camera pose relative to the person. It is better to know the calibration of the camera, but you can use the DLT (Direct Linear Transform) alghoritm if you don't have this data.

Upvotes: 2

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