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Endoscopy 1987; 19(6): 233-236
DOI: 10.1055/s-2007-1018290
© Georg Thieme Verlag KG Stuttgart · New York

Color Performance of Video Endoscopes: Quantitative Measurement of Color Reproduction

K. Knyrim, H. K. Seidlitz1 , F. Hagenmüller, M. Classen
  • II. Med. Klinik, Klinikum rechts der Isar, TUM
  • 1Institut für Angewandte Optik, Gesellschaft für Strahlen- und Umweltforschung mbH, Neuherberg, West-Germany
We thank the Fuji Company, Olympus Company, Thoshiba/Machida Company, and the Welch-Allyn Company for giving us the opportunity to test their video endoscopes.
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Publication History

Publication Date:
17 March 2008 (online)

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Summary

We have conducted a study aimed at testing the color performance of video endoscopes in quantitative terms for the first time. The video endoscopes investigated were from Fuji, Olympus, Toshiba/Machida, and Welch-Allyn. The tests were carried out with an opto-electronic color analyser using standardized color charts and a neutral grey chart. Hue and chroma of the reproduced colors were measured.

The Olympus video endoscope reproduces the hue very well, showing only slight color desaturation. The Fuji video endoscope had a yellowish tint, whereas the picture obtained with the WA video endoscope produced an inhomogeneous picture with a pronounced red/purplish cast at the top of the screen and almost neutral reproduction at the lower half. The Toshiba video endoscope was the only one with a color chip, and reproduced hue fairly well, but its colors were weakly saturated.

Key words:

Video endoscope - Color reproduction

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