Meaning of depth image from kinect by openni_launch [closed]

asked 2013-05-21 02:59:11 -0600

sai gravatar image

updated 2016-10-24 08:35:02 -0600

ngrennan gravatar image

Hi,

openni_launch package publishes a topic /camera/depth/image from kinect.

I observed the data and I found that it ranges from 0 to 255.

Can any one give some meaning to those values,

1.Does 255 or 0 mean that the object is close or far away?

2.What will be the values for areas where there is no depth information like shadows of object?

3.I want to extract keypoints on the depth images ?

4.What is the difference between depth image and range image?

Any suggestions

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Closed for the following reason question is not relevant or outdated by tfoote
close date 2017-03-29 17:42:49.799857