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Sensors 2010, 10(8), 7803-7842;

Class Separation Improvements in Pixel Classification Using Colour Injection

Department of Electronics and Electromechanics, Pontificia Universidad Católica Madre y Maestra, 822 Santiago, Dominican Republic
Electronics Department, University of Alcalá, Campus Universitario s/n, 28805, Alcalá de Henares, Spain
Author to whom correspondence should be addressed.
Received: 25 June 2010 / Revised: 20 July 2010 / Accepted: 4 August 2010 / Published: 20 August 2010
(This article belongs to the Special Issue Intelligent Sensors - 2010)
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This paper presents an improvement in the colour image segmentation in the Hue Saturation (HS) sub-space. The authors propose to inject (add) a colour vector in the Red Green Blue (RGB) space to increase the class separation in the HS plane. The goal of the work is the development of an algorithm to obtain the optimal colour vector for injection that maximizes the separation between the classes in the HS plane. The chromatic Chrominace-1 Chrominance-2 sub-space (of the Luminance Chrominace-1 Chrominance-2 (YC1C2) space) is used to obtain the optimal vector to add. The proposal is applied on each frame of a colour image sequence in real-time. It has been tested in applications with reduced contrast between the colours of the background and the object, and particularly when the size of the object is very small in comparison with the size of the captured scene. Numerous tests have confirmed that this proposal improves the segmentation process, considerably reducing the effects of the variation of the light intensity of the scene. Several tests have been made in skin segmentation in applications for sign language recognition via computer vision, where an accurate segmentation of hands and face is required. View Full-Text
Keywords: pixel classification; colour clustering; colour segmentation; class separation; colour sub-spaces; colour injection pixel classification; colour clustering; colour segmentation; class separation; colour sub-spaces; colour injection

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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Blanco, E.; Mazo, M.; Bergasa, L.; Palazuelos, S.; Rodríguez, J.; Losada, C.; Martín, J. Class Separation Improvements in Pixel Classification Using Colour Injection. Sensors 2010, 10, 7803-7842.

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