NDLI: Direct estimation of affine image deformations using visual front-end operations with automatic scale selection

Content Provider	IEEE Xplore Digital Library
Author	Lindeberg, T.
Copyright Year	1995
Description	Author affiliation: R. Inst. of Technol., Stockholm, Sweden (Lindeberg, T.)
Abstract	This article deals with the problem of estimating deformations of brightness patterns using visual front-end operations. Estimating such deformations constitutes an important subtask in several computer vision problems relating to image correspondence and shape estimation. The following subjects are treated: The problem of decomposing affine flow fields into simpler components is analysed in detail. A canonical parametrization is presented based on singular value decomposition, which naturally separates the rotationally invariant components of the flow field from the rotationally variant ones. A novel mechanism is presented for automatic selection of scale levels when estimating local affine deformations. This mechanism is expressed within a multiscale framework where disparity estimates are computed in a hierarchical coarse-to-fine manner and corrected using iterative techniques. Then, deformation estimates are selected from the scales that minimize a certain normalized residual over scales. Finally, the descriptors so obtained serve as initial data for computing refined estimates of the local deformations.<>
Starting Page	134
Ending Page	141
File Size	964774
Page Count	8
File Format	PDF
ISBN	0818670428
DOI	10.1109/ICCV.1995.466795
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-06-20
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computer vision Deformable models Shape control Brightness Cameras Motion estimation Laboratories Computational modeling Stereo vision Motion control
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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