Method and apparatus for estimating rotation, focal lengths and radial distortion in panoramic image stitching
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United States of America Patent
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May 21, 2013
Grant Date -
May 16, 2013
app pub date -
Mar 2, 2012
filing date -
Nov 29, 2007
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Abstract
Method and apparatus for estimating relative three-dimensional (3D) camera rotations, focal lengths, and radial (lens) distortions from point-correspondences in pairwise (two image) image alignment. A core estimator takes a minimal (three) number of point-correspondences and returns a rotation, lens (radial) distortion and two focal lengths. The core estimator solves relative 3D camera rotations, and lens distortions from 3-point-correspondences in two images in the presence of noise in point-correspondences. A robust estimator may be based on or may be “wrapped around” the core estimator to handle noise and errors in point-correspondences. The robust estimator may determine an alignment model for a pair of images from the rotation, distortion, and focal lengths.
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