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What effect does calibrating the Kinect have?

asked 2011-02-20 23:08:39 -0500

Deon Joubert gravatar image

updated 2016-10-24 09:01:52 -0500

ngrennan gravatar image

How much of a difference does in make to calibrate the Kinect using the procedure described in http://www.ros.org/wiki/kinect/Tutori... ? How much of an improvement is there with the new parameters versus just using the default parameters?

Are there any other kinect calibration routines I should know about?

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answered 2011-02-22 09:02:06 -0500

Mac gravatar image

As has been mentioned, the OpenNI drivers give you access to the factory calibration, which means you don't need to calibrate manually.

However, if you want to anyway (for example, to use libfreenect on systems that don't have ROS), it makes a huge difference in the alignment of the points and RGB values.

An easy way to demonstrate this is to fire up rviz, and visualize the PointCloud2 that's published by the kinect_camera driver; if you haven't calibrated, you'll notice a serious mismatch between the points and colors. If you then switch to the openni_camera driver, you'll notice how much better things are. Calibrating the sensor manually (kinect_calibration) will get alignment performance on par with openni_camera.

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answered 2011-02-21 02:59:02 -0500

fergs gravatar image

That calibration routine was for the old "kinect" package drivers (based on libfreenect). If you use the new openni-based drivers, it's not needed (as we now have access to the factory calibration) (see ros.org/wiki/ni).

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Asked: 2011-02-20 23:08:39 -0500

Seen: 1,125 times

Last updated: Feb 22 '11