Patent ID: 8723940
Filing Date: 2014-05-13
Classification: A61B

Abstract:
1. An endoscope apparatus comprising: an illumination section radiating at least one or more illumination lights having a predetermined wavelength band to a subject; an image pickup section picking up an image of a return light from the subject based on radiation of the illumination section; a band decomposition processing section performing processing for decomposition into multiple spatial frequency bands, for a signal corresponding to a first wavelength band having a narrowband spectral characteristic, in a red band in a visible range between a wavelength band including a maximum value and a wavelength band including a minimum value with regard to a hemoglobin absorption characteristic of living tissue of the subject, after image pickup by the image pickup section; an emphasis processing section generating a signal obtained by performing emphasis correction for luminance adjustment for a band image signal with a lowest spatial frequency among multiple band image signals obtained by the decomposition processing by the band decomposition processing section; a color conversion processing section performing processing for giving a predetermined coefficient to the signal emphasis-corrected in the emphasis processing section and a signal corresponding to a second wavelength band having an absorption coefficient of the hemoglobin absorption characteristic lower than an absorption coefficient of the hemoglobin absorption characteristic of the signal corresponding to the first wavelength band and having such a spectral characteristic that a scattering characteristic of the living tissue is suppressed, and allocating the signals to respective color channels of BGR; and a display section displaying the signals allocated by the color conversion processing section.