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Color Constancy Using a Global Nose Camera Attachment

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A new color constancy method was recently introduced in Ref. 1 using a camera attachment “nose”, which is visible in the image, for spatial measurement of illumination color in the scene. The illumination measurement principle relies on the appearance of highlights or satisfaction of the gray world assumption inside a scene area. However, the nose size was big in the system and its image occupied 25% of the image area.

In this paper, the previous system is modified by reducing the nose size which becomes suitable for measuring uniform illumination color in the scene. In the modified system, the nose image appears continually as a small triangle in an image corner occupying less than 3% of the image area. The color correction algorithm processes the saturated pixels to give them a natural appearance.

A novel technique to balance image colors optically is also introduced that preserves the color resolution in the corrected image. Extensive experiments were carried out which confirmed the effectiveness of the new system.
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Document Type: Research Article

Publication date: January 1, 2002

More about this publication?
  • Started in 2002 and merged with the Color and Imaging Conference (CIC) in 2014, CGIV covered a wide range of topics related to colour and visual information, including color science, computational color, color in computer graphics, color reproduction, volor vision/psychophysics, color image quality, color image processing, and multispectral color science. Drawing papers from researchers, scientists, and engineers worldwide, DGIV offered attendees a unique experience to share with colleagues in industry and academic, and on national and international standards committees. Held every year in Europe, DGIV papers were more academic in their focus and had high student participation rates.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual papers for details.

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