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Application of Spectral Estimation Techniques to the Improvement of a 3D-color Digitizing Camera

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This paper reports on the colorimetric improvement of a multispectral 3D digitizer through scanning at optimized wavelengths. These wavelengths were first established theoretically based on the criteria of minimal CIEDE2000 color difference over the set of reflectance curves from the full OSA-UCS catalog. A PCA-based and a spline-based spectral estimation method were considered, and sets of three, four and five optimal sampling wavelengths were derived for each method. This provided a basis for the selection of HeCd, ArKr, HeNe and DPSS commercial laser lines for which the colorimetric performance was predicted. This was then tested in the lab, where colour rendition charts were scanned with the camera at seven wavelengths, after which the charts were computer-rendered on a CRT display. Both the theoretical prediction and the experimental observation indicate that four well-chosen wavelengths are adequate for proper rendition of the charts.
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Document Type: Research Article

Publication date: January 1, 2004

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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