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 Δ
Tatsuya Shiobara, Shixin Zhou, Hideaki Haneishi, Yoichi Miyake, "Improved Color Reproduction of Electronic Endoscopes" in Proc. IS&T 3rd Color and Imaging Conf., 1995, pp 186 - 190, https://doi.org/10.2352/CIC.1995.3.1.art00049