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Colorimetric Characterization of Digital Cameras Preserving Hue Planes

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In this paper we present a colorimetric characterization method for digital color cameras, based on hue plane and white point preservation. The present implementation of the method incorporates a series of 3 by 3 matrices, each responsible for the transformation of a subset of camera RGB-values to colorimetric XYZ-values. The method is compared to a choice of three other common characterization methods based on least squares fitting. These other methods are an unconstrained 3 by 3 matrix, a white point preserving 3 by 3 matrix and a second order polynomial.

The methods have been evaluated on real camera signals coming from an Imacon Ixpress professional digital CCD camera, under flash light. The Gretag MacBeth Color Checker and the Color Checker DC charts have been used as test set and training set (respectively). The method is evaluated in combination with a noise susceptibility estimation of the training set samples and a preliminary subdivision of the hue domain, that reduces the amount of test samples needed in the characterization. The noise estimation is based on a geometric analysis in camera chromaticity space.
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Document Type: Research Article

Publication date: January 1, 2005

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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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