Frame of reference for 3d keypoints

akanazawa / hmr

Project page for End-to-end Recovery of Human Shape and Pose

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Frame of reference for 3d keypoints #43

Closed vasavig closed 6 years ago

vasavig commented 6 years ago

What is the frame of reference with respect to which the 3d keypoints are found? Is this frame of reference same across any input image?

I am trying to do perspective correction on the 3d keypoints. I need to know the frame of reference to do this. Thanks in advance!

akanazawa commented 6 years ago

Hi,

I'm not exactly sure what you mean by frame of reference. HMR is object-centric, so the camera is always at identity. Do you mean the global coordinate frame? It's that of SMPL's bc it's object-centric. The camera never rotates, instead the person rotates (and gets translated in the image plane).