IEEE Trans Image Process - Chromaticity space for illuminant invariant recognition.

Tópicos

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Resumo

In this paper an algorithm is proposed to extract two illuminant invariant chromaticity features from three image sensor responses. The algorithm extracts these chromaticity features at pixel level and therefore can perform well in scenes illuminated with non-uniform illuminant. An approach is proposed to use the algorithm with cameras of unknown sensitivity. The algorithm was tested for separability of perceptually similar colours under the International Commission on Illumination (CIE) standard illuminants and obtained a good performance. It was also tested for colour based object recognition by illuminating objects with typical indoor illuminants and obtained a better performance compared to other existing algorithms investigated in this paper. Finally, the algorithm was tested for skin detection invariant to illuminant, ethnic background and imaging device. In this investigation, daylight scenes under different weather conditions and scenes illuminated by typical indoor illuminants were used. The proposed algorithm gives a better skin detection performance compared to widely used standard colour spaces. Based on the results presented, the proposed illuminant invariant chromaticity space can be used for machine vision applications including illuminant invariant colour based object recognition and skin detection.

Resumo Limpo

paper algorithm propos extract two illumin invari chromat featur three imag sensor respons algorithm extract chromat featur pixel level therefor can perform well scene illumin nonuniform illumin approach propos use algorithm camera unknown sensit algorithm test separ perceptu similar colour intern commiss illumin cie standard illumin obtain good perform also test colour base object recognit illumin object typic indoor illumin obtain better perform compar exist algorithm investig paper final algorithm test skin detect invari illumin ethnic background imag devic investig daylight scene differ weather condit scene illumin typic indoor illumin use propos algorithm give better skin detect perform compar wide use standard colour space base result present propos illumin invari chromat space can use machin vision applic includ illumin invari colour base object recognit skin detect

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