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Calibration: Difference between revisions
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===Things to calibrate=== | ===Things to calibrate=== | ||
*nonlinear effects for both cameras: | *nonlinear effects for both cameras: | ||
**radial distortion | **radial distortion [http://en.wikipedia.org/wiki/Distortion_(optics)#Radial_distortion On Wikipedia] | ||
**tangential distortion | **tangential distortion (sensor chip not parallel) | ||
**rotational errors | **rotational errors (sensor rotated on image plane) | ||
*Intrinsics matrix for both: Video camera & Depth Camera | *Intrinsics matrix for both: Video camera & Depth Camera | ||
*Extrinsics matrix for both: Video camera & Depth Camera | *Extrinsics matrix for both: Video camera & Depth Camera | ||
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===Questions to answer | ===Questions to answer=== | ||
* Which parameters change much between different devices, | * Which parameters change much between different devices, | ||
* Which change minor (and can be set constant?) | * Which change minor (and can be set constant?) | ||
* Are routines to calculate parameters needed, or could a seperate application be used (based on OpenCV, for example) | * Are routines to calculate parameters needed, or could a seperate application be used (based on OpenCV, for example) | ||
* | * | ||
===Links=== | |||
* Calibration based on libfreenect and rgbdemo (Nicolas Burrus): | |||
** http://nicolas.burrus.name/index.php/Research/KinectRgbDemo | |||
** http://nicolas.burrus.name/index.php/Research/KinectCalibration | |||
* [http://www.xboxgaming.co.za/news/the-secret-of-kinects-calibration-revealed/ About Xbox calibration] | |||
Revision as of 18:28, 2 December 2010
Calibration
This page shall help to define a calibration procedure. Please add your knowledge.
Things to calibrate
- nonlinear effects for both cameras:
- radial distortion On Wikipedia
- tangential distortion (sensor chip not parallel)
- rotational errors (sensor rotated on image plane)
- Intrinsics matrix for both: Video camera & Depth Camera
- Extrinsics matrix for both: Video camera & Depth Camera
- Registration of both cameras
- Rotational tolerances
- ?
Questions to answer
- Which parameters change much between different devices,
- Which change minor (and can be set constant?)
- Are routines to calculate parameters needed, or could a seperate application be used (based on OpenCV, for example)
Links
- Calibration based on libfreenect and rgbdemo (Nicolas Burrus):
- About Xbox calibration
