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Improved Color Reproduction of Electronic Endoscopes

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Image quality of the electronic endoscopes are poor compared to the conventional optical endoscopes which use color film. It is our goal to improve the image quality, particularly color reproduction of electronic endoscopes.

To achieve our goal, we have developed the endoscopic spectrophotometer to measure the spectral reflectance of gastric mucous membrane. The instrument consists of a light source with xenon lamp; a conventional spectrophotometer; an optical multichannel analyzer with 1024 silicon photodiodes; and personal computer. Three hundred and ten spectra have been analyzed by the principal component analysis. The results indicate that the reflectance spectra can be adequately described less than the average color difference ΔE = 2.66 in the L*u*v* color space using only three principal components.

Based on the above experimental result, it is shown that the spectral reflectance of all pixels in gastric mucous membrane can be calculated from the R, G, B signals of the conventional electronic endoscopes. Computer simulations of the color reproduction of electronic endoscopes were performed, and the resulting spectral characteristics under different illuminants are described and analyzed.
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Document Type: Research Article

Publication date: January 1, 1995

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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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