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Neural network-based colonoscopic diagnosis using on-line learning and differential evolution

By George D. Magoulas, V.P. Plagianakos and M.N. Vrahatis

Abstract

In this paper, on-line training of neural networks is investigated in the context of computer-assisted colonoscopic diagnosis. A memory-based adaptation of the learning rate for the on-line back-propagation (BP) is proposed and used to seed an on-line evolution process that applies a differential evolution (DE) strategy to (re-) adapt the neural network to modified environmental conditions. Our approach looks at on-line training from the perspective of tracking the changing location of an approximate solution of a pattern-based, and thus, dynamically changing, error function. The proposed hybrid strategy is compared with other standard training methods that have traditionally been used for training neural networks off-line. Results in interpreting colonoscopy images and frames of video sequences are promising and suggest that networks trained with this strategy detect malignant regions of interest with accuracy

Topics: csis
Publisher: Elsevier
Year: 2004
OAI identifier: oai:eprints.bbk.ac.uk.oai2:350

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