RT info:eu-repo/semantics/article T1 Class separation improvements in pixel classification using colour injection A1 Blanco, Edward A1 Mazo Quintas, Manuel Ramón A1 Bergasa Pascual, Luis Miguel A1 Palazuelos Cagigas, Sira Elena A1 Rodríguez Ascariz, José Manuel A1 Losada Gutiérrez, Cristina A1 Martín Sánchez, José Luis K1 Pixel classification K1 Colour clustering K1 Colour segmentation K1 Class separation K1 Colour sub-spaces K1 Colour injection K1 Electrónica K1 Electronics AB 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. PB MDPI SN 1424-8220 YR 2010 FD 2010-08-20 LK http://hdl.handle.net/10017/43549 UL http://hdl.handle.net/10017/43549 LA eng NO Ministerio de Ciencia e Innovación DS MINDS@UW RD 26-abr-2024