Flexible Camera Calibration by Viewing a Plane from Unknown Orientations. Zhengyou Zhang Vision Technology Group Microsoft Research. Problem Statement. Determine the characteristics of a camera (focal length, aspect ratio, principal point) from visual information (images). Motivations.
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Vision Technology Group
(such that it can be used by the general public)
Yes. See RESULTS
Given OrientationsH, which is defined up to a scale factor,
, we haveWhat do we get from one image?
Absolute conic OrientationsGeometric interpretation
Plane at infinity
up to a scale factor
as linear equations:
How about more images?
Better! More constraints than unknowns.
(analytic solution followed by MLE)
Original image OrientationsCorrection of Radial Distortion