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On the Application of a Modified Self-Organizing Neural Network to Estimate Stereo Disparity

Venkatesh, YV and Raja, SK and Kumar, AJ (2007) On the Application of a Modified Self-Organizing Neural Network to Estimate Stereo Disparity. In: IEEE Transactions on Image Processing, 16 (11). pp. 1057-7149.


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We propose a modified self-organizing neural network to estimate the disparity map from a stereo pair of images. Novelty consists of the network architecture and of dispensing with the standard assumption of epipolar geometry. Quite distinct from the existing algorithms which, typically, involve area- and/or feature-matching, the network is first initialized to the right image, and then deformed until it is transformed into the left image, or vice versa, this deformation itself being the measure of disparity. Illustrative examples include two classes of stereo pairs: synthetic and natural (including random-dot stereograms and wire frames) and distorted. The latter has one of the following special characteristics: one image is blurred, one image is of a different size, there are salient features like discontinuous depth values at boundaries and surface wrinkles, and there exist occluded and half-occluded regions. While these examples serve, in general, to demonstrate that the technique performs better than many existing algorithms, the above-mentioned stereo pairs (in particular, the last two) bring out some of its limitations, thereby serving as possible motivation for further work.

Item Type: Journal Article
Publication: IEEE Transactions on Image Processing
Publisher: IEEE
Additional Information: Copyright 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: Correspondence problem;Nonepipolar;Occlusion;Self-organizing map (SOM);Stereo disparity estimation;Stereo-pair analysis;
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 18 Dec 2007
Last Modified: 19 Sep 2010 04:41
URI: http://eprints.iisc.ac.in/id/eprint/12550

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