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What does the "depth" mean on earth?

asked 2015-07-16 04:32:36 -0600

somebodyus gravatar image

updated 2015-07-16 04:34:36 -0600

I am really confused about the meaning of "depth" which is acquired by a RGB-D camera. I think there are two meanings,

1: The distance from a point in the 3-D world to the infrared camera center.

2: The Z value of the 3-D world point in the camera frame.

Which is right?

If the second meaning is right, the depth values of all the points in a wall which is parallel with the RGB-D camera should be equal, but the fact is not like that. However, many 3-D vision books indicate the second meaning is right. I am really confused. Who can help me?

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answered 2018-01-11 20:19:51 -0600

tfoote gravatar image

The data being provided should have a frame_id defined which will tell you which coordinate frame the data is referenced against.

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Asked: 2015-07-16 04:32:36 -0600

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Last updated: Jan 11 '18