问题
I would like to know if the Kinect capture color, depth and IR images in orthographic or perspective mode?
回答1:
While there is no clear mention of this particular information, based on my experience of using Kinect v1 and v2, I would say the following:
Color and IR cameras: Perspective Both are normal RGB cameras (IR one has an IR filter) with a lens and have camera parameters, lens distortion etc. The objects in image get smaller as they go farther
Depth: Orthographic Based on how the depth is calculated [4], the depth image is a representation of a point cloud which removes the sense of perspective.
Again, this might be wrong, but I believe it should be close enough. Apologies if it is wrong.
[4]: M. Andersen, T. Jensen, P. Lisouski, A. Mortensen, M. Hansen, T. Gregersen, and P. Ahrendt, “Kinect Depth Sensor Evaluation for Computer Vision Applications,” Technical Report Electronics and Computer Engineering, vol. 1, no. 6, 2015.
来源：https://stackoverflow.com/questions/47517836/is-kinect-orthographic-or-perspective-mode