Title: Top-down modulated model for object recognition in different categorisation levels

Authors: Fatemeh Sharifizadeh; Mohammad Ganjtabesh; Abbas Nowzari-Dalini

Addresses: Department of Computer Science, School of Mathematics, Statistics, and Computer Science, College of Science, University of Tehran, Tehran, Iran ' Department of Computer Science, School of Mathematics, Statistics, and Computer Science, College of Science, University of Tehran, Tehran, Iran ' Department of Computer Science, School of Mathematics, Statistics, and Computer Science, College of Science, University of Tehran, Tehran, Iran

Abstract: The human visual system contains a hierarchical sequence of modules that take part in visual perception at superordinate, basic, and subordinate categorisation levels. The top-down signals facilitate the bottom-up processing of visual information in the cortical analysis of object recognition. We propose a novel computational model for object recognition in different categorisation levels, which mimics the effects of top-down signals in the hierarchical processing of the visual system. The top-down signal is incorporated in bottom-up processing of input image to increase the biological plausibility of our model as well as its efficiency for the object recognition in different categorisation levels. The top-down signals provide a pre-knowledge about the input space, which can help to solve the complex object recognition tasks. The performance of our model is evaluated by various appraisal criteria with three benchmark datasets and significant improvement in recognition accuracy of our proposed model is achieved in all experiments.

Keywords: object recognition; categorisation levels; computational models; bottom-up processing; top-down signals.

DOI: 10.1504/IJBIC.2021.117428

International Journal of Bio-Inspired Computation, 2021 Vol.18 No.1, pp.13 - 26

Received: 06 Dec 2019
Accepted: 21 Aug 2020
Published online: 06 Sep 2021 *

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