NDLI: Image matching under affine deformations

Content Provider	IEEE Xplore Digital Library
Author	Manmatha, R.
Copyright Year	1993
Description	Author affiliation: Dept. of Comput. Sci., Massachusetts Univ., Amherst, MA, USA (Manmatha, R.)
Abstract	Image deformations due to relative motion between an observer and an object may be used to infer 3D structure. Up to first order these deformations can be written in terms of an affine transform. A novel approach is adopted to measuring affine transforms which correctly handles the problem of corresponding deformed patches. The patches are filtered using gaussians and derivatives of gaussians and the filters deformed according to the affine transform. The problem of finding the affine transform is therefore reduced to that of finding the appropriate deformed filter to use. The gaussian equations are solved both in the special case where the affine transform can be written as a similarity transform and for the general affine transform. The method is local and can handle arbitrarily large affine deformations. Experiments demonstrate that this technique can find scale changes and optical flow in situations where other methods fail. The experiments also demonstrate the robustness of the technique.
Starting Page	106
Ending Page	110
File Size	557464
Page Count	5
File Format	PDF
ISBN	0818641207
ISSN	10586393
DOI	10.1109/ACSSC.1993.342480
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1993-11-01
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image matching Transforms Gaussian processes Equations Optical filters Image motion analysis Robustness
Content Type	Text
Resource Type	Article
Subject	Signal Processing Computer Networks and Communications

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