| 摘要 |
A spectral image obtainment means (10) obtains spectral image data by receiving reflection light in different wavelength bands, into which light (Lk) reflected by a living body mucous membrane (1) has been separated, in such a manner that a ratio of a light receiving level in a short wavelength band at a light receiving means (12) with respect to a light receiving level in a long wavelength band thereat is greater than a ratio of spectral reflectance in the short wavelength band at the living body mucous membrane (1) with respect to spectral reflectance in the long wavelength band thereat. A spectral image data operation means (20) performs a spectral image estimation operation by correcting the value of the spectral image data to a value obtained by receiving light without causing the ratio to be greater. Accordingly, a diagnostic spectral image of the living body mucous membrane (1) is obtained.
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