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Image Quality and Change of Illuminant: An Information-Theoretic Evaluation

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We investigate the influence of scene illuminant on perceived image quality. Given two multispectral images, an original and a reproduction (e.g. compressed, gamut mapped,..), we seek redundancies of perceived difference through changes of illuminant, and with regard to 5 so-called image difference features (IDF). In order to do this, we employ an information-theoretic perspective to measure variations of entropies in each IDF, w.r.t. various scene illuminants, and in the case of two particular kinds of distortions: spectral gamut mapping and a spectral reconstruction from a six-channel camera model. Our results indicate that changing the scene illuminant has a lesser influence on achromatic image difference features.
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Document Type: Research Article

Publication date: January 1, 2013

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  • CIC is the premier annual technical gathering for scientists, technologists, and engineers working in the areas of color science and systems, and their application to color imaging. Participants represent disciplines ranging from psychophysics, optical physics, image processing, color science to graphic arts, systems engineering, and hardware and software development. While a broad mix of professional interests is the hallmark of these conferences, the focus is color. CICs traditionally offer two days of short courses followed by three days of technical sessions that include three keynotes, an evening lecture, a vibrant interactive (poster) papers session, and workshops. An endearing symbol of the meeting is the Cactus Award, given each year to the author(s) of the best interactive paper; there are also Best Paper and Best Student Paper awards.

    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 paper for details.

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