3D Keypoints - Units and Scale Factor

[mjcpiopio]

Hello! I am using the 3D algorithms available, MotionBert, VideoPose3D and Simplebaseline. I wanted to compare the outputs of this algorithms by transforming the keypoints coordinates output in meters. How can I do that? What is the scale used in the output referential of these algorithms? thank you!

[HabibaAbderrahim]

I've posed similar question before but I didn't receive an answer. Probably the unit is mm , I am making suggestions because the used dataset is Human3.6 , if you have an updates pls let me know .