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An Invariant Pulse-Coder for 2-D Shape Recognition

Rishikesh, N and Venkatesh, YV (1997) An Invariant Pulse-Coder for 2-D Shape Recognition. In: 1997 International Conference on Information Communications and Signal Processing,ICICS, 9-12 September, Singapore, Vol. 3, 1552-1556.


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We present some novel schemes for (i)pulse coding for invariant representation of shape; and(ii) a neural architecture for recognizing the encoded shape. The proposed shape encoder utilizes the properties of complex logarithmic mapping (CLM) which transforms rotation and scaling(in its domain)to shifts (in its range). In order to handle this shift, in an attempt to provide increased speed of operation, the encoder converts the CLM output to a sequence of pulses. These pulses are fed to a novel multi-layered neural recognizer which (i) invokes template matching with a distinct architecture; and (ii) achieves robustness (to noise and shape deformation) by virtue of its overlapping strategy for code classification. The proposed encoder-recognizer system, which is hardware implementable by a high-speed electronic switching circuit, and can add new shapes on-line to the existing ones, is illustrated by examples. Shortage of space precludes a full description of the results.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: Copyright 1997 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.
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 22 Aug 2008
Last Modified: 19 Sep 2010 04:35
URI: http://eprints.iisc.ac.in/id/eprint/9852

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