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Proceedings Paper

Advanced colour processing for mobile devices
Author(s): Eugen Gillich; Helene Dörksen; Volker Lohweg
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Paper Abstract

Mobile devices such as smartphones are going to play an important role in professionally image processing tasks. However, mobile systems were not designed for such applications, especially in terms of image processing requirements like stability and robustness. One major drawback is the automatic white balance, which comes with the devices. It is necessary for many applications, but of no use when applied to shiny surfaces. Such an issue appears when image acquisition takes place in differently coloured illuminations caused by different environments. This results in inhomogeneous appearances of the same subject. In our paper we show a new approach for handling the complex task of generating a low-noise and sharp image without spatial filtering. Our method is based on the fact that we analyze the spectral and saturation distribution of the channels. Furthermore, the RGB space is transformed into a more convenient space, a particular HSI space. We generate the greyscale image by a control procedure that takes into account the colour channels. This leads in an adaptive colour mixing model with reduced noise. The results of the optimized images are used to show how, e. g., image classification benefits from our colour adaptation approach.

Paper Details

Date Published: 27 February 2015
PDF: 13 pages
Proc. SPIE 9405, Image Processing: Machine Vision Applications VIII, 940508 (27 February 2015); doi: 10.1117/12.2076139
Show Author Affiliations
Eugen Gillich, Ostwestfalen-Lippe Univ. of Applied Sciences (Germany)
Helene Dörksen, Ostwestfalen-Lippe Univ. of Applied Sciences (Germany)
Volker Lohweg, Ostwestfalen-Lippe Univ. of Applied Sciences (Germany)

Published in SPIE Proceedings Vol. 9405:
Image Processing: Machine Vision Applications VIII
Edmund Y. Lam; Kurt S. Niel, Editor(s)

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