Image analysis – Image transformation or preprocessing – Changing the image coordinates
Patent
1996-11-12
1999-03-02
Boudreau, Leo H.
Image analysis
Image transformation or preprocessing
Changing the image coordinates
382254, G06K 900
Patent
active
058781749
ABSTRACT:
A method for correcting lens distortion in a photographic image used in texture mapping a CAD image uses a one-dimensional distortion correction curve. The photographic image is represented by an original texture image plane having a plurality of original points produced by a photographic device having a lens. The method has the steps of marking a plurality of data points in a predefined two-dimensional physical wall space and determining a wall space radial distance for each of the plurality of data points, taking a test photograph of the wall space with the photographic device, converting the test photograph to a digital two-dimensional image space, determine an image space radial distance for each of the plurality of data points in the image space, curve fitting the wall space radial distance and the corresponding image space radial distance pairs for each of the plurality of data points, and mapping each of the plurality of original points to a corresponding corrected point with the distortion correction curve so as to produce a corrected texture image plane having a plurality of corrected points.
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Chen Yifan
Stewart Paul Joseph
Boudreau Leo H.
Ford Global Technologies Inc.
Kelley David B.
Tadayon Bijan
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