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Revision as of 19:24, 18 November 2007 by Erik Krause (Prepared for new glossary template)
Roll is the angle of camera rotation around it's optical axis.
If your camera is not level this can be in two directions:
- the image is tilted up or down, resulting in a Pitch value different from 0.0
- the image is rotated such that the horizon is not horizontal if held upright, resulting in a Roll value different from 0.0