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Authors: Rahul Walia and Ray Jarvis

Affiliation: Department of ECSE, Monash University, Australia

ISBN: 978-989-8111-69-2

ISSN: 2184-4321

Keyword(s): Scale-Space Theory, Pattern Recognition in Image Understanding, Segmentation and Grouping.

Related Ontology Subjects/Areas/Topics: Computer Vision, Visualization and Computer Graphics ; Early Vision and Image Representation ; Image and Video Analysis ; Segmentation and Grouping ; Statistical Approach

Abstract: A method for gauging the appropriate scale for foreground-background discrimination in Scale-Space theory is presented. Otsu’s Threshold (OT) is a statistical parameter generated from the first two moments of a histogram of a signal / image. In the current work a set of OT is derived from histograms of derivatives of image having Scale-Space representation. This set of OT, when plotted against corresponding scale, generates a Threshold Graph (TG). The TG undergoes an exponential decay, in the absence of foreground and exhibits inflection(s) in the presence of foreground. It is demonstrated, using synthetic and natural images, that the maxima of inflection indicate the scale and threshold (OT) appropriate to interface edges. The edges identified by thresholding at scale and threshold given by inflection of OT correspond to foreground-background interface edges. The histogram inherently imbeds the TG with underlying image signal parameters like background intensity range, pattern fre quency, foreground-background intensity gradient, foreground size etc, making the method adaptable and deployable for unsupervised machine vision applications. Commutative, separable and symmetric properties of the Scale-Space representation of an image and its derivatives are preserved and computationally efficient implementations are available. (More)

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Paper citation in several formats:
Walia R.; Jarvis R. and (2009). STRUCTURE, SCALE-SPACE AND DECAY OF OTSU’S THRESHOLD IN IMAGES FOR FOREGROUND/BACKGROUND DISCRIMINATION.In Proceedings of the Fourth International Conference on Computer Vision Theory and Applications - Volume 2: VISAPP, (VISIGRAPP 2009) ISBN 978-989-8111-69-2, pages 120-128. DOI: 10.5220/0001755101200128

@conference{visapp09,
author={Rahul Walia and Ray Jarvis},
title={STRUCTURE, SCALE-SPACE AND DECAY OF OTSU’S THRESHOLD IN IMAGES FOR FOREGROUND/BACKGROUND DISCRIMINATION},
booktitle={Proceedings of the Fourth International Conference on Computer Vision Theory and Applications - Volume 2: VISAPP, (VISIGRAPP 2009)},
year={2009},
pages={120-128},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001755101200128},
isbn={978-989-8111-69-2},
}

TY - CONF

JO - Proceedings of the Fourth International Conference on Computer Vision Theory and Applications - Volume 2: VISAPP, (VISIGRAPP 2009)
TI - STRUCTURE, SCALE-SPACE AND DECAY OF OTSU’S THRESHOLD IN IMAGES FOR FOREGROUND/BACKGROUND DISCRIMINATION
SN - 978-989-8111-69-2
AU - Walia, R.
AU - Jarvis, R.
PY - 2009
SP - 120
EP - 128
DO - 10.5220/0001755101200128

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