US 2011/0237885 A1 · ENDOSCOPE SYSTEM COMPRISING CALIBRATION MEANS AND CALIBRATION METHOD THEREOF

Abstract

An electronic endoscope system includes a light source device for emitting light and an electronic endoscope having a phosphor for producing white light with which a subject tissue in a body cavity is illuminated by causing the light to hit the phosphor as excitation light, and an image sensor for outputting image data of an image obtained by photoelectric conversion of reflected light of the white light illuminating the subject tissue, a wavelength detector for detecting a wavelength of the light, a calculator for calculating a wavelength shift amount which is a difference between a wavelength detected and a preset reference wavelength, a first correction unit for correcting a light amount of the light according to the calculated wavelength shift amount, and a second correction unit for correcting the gain in photoelectric conversion by the image sensor.

Claims13

Dependent claims

An electronic endoscope system, comprising:

a light source device for emitting light having a given wavelength band;
an electronic endoscope comprising a phosphor for producing white light with which a subject tissue in a body cavity is illuminated by causing the emitted light from said light source device to hit said phosphor as excitation light, and an image sensor for outputting image data of an image obtained by photoelectric conversion of reflected light of the white light illuminating the subject tissue;
wavelength detection means for detecting a wavelength of the emitted light from said light source device;
wavelength shift amount calculation means for calculating a wavelength shift amount, which is a difference between a wavelength detected by said wavelength detection means and a preset reference wavelength;
and
first correction means for correcting a light amount of the emitted light from the light source device according to the wavelength shift amount calculated by said wavelength shift amount calculation means and second correction means for correcting a gain in the photoelectric conversion by said image sensor.

3 more elements

A method of calibrating an electronic endoscope provided with a light source device for emitting light having a given wavelength band and an image sensor that illuminates a subject tissue in a body cavity with white light produced by causing excitation light emitted from the light source device to hit a phosphor and outputs image data obtained by photoelectric conversion of reflected light of the white light illuminating the subject tissue, the method comprising:

a wavelength detection step of detecting a wavelength of light emitted from the light source device;
a wavelength shift amount detection step of detecting a wavelength shift amount, which is a difference between the detected wavelength and a preset reference wavelength;
a first correction step of correcting a light amount of the light emitted from the light source device according to the calculated wavelength shift amount;
and
a second correction step of correcting a gain in photoelectric conversion by the image sensor according to the calculated wavelength shift amount.

2 more elements

Dependencies are inferred from the claim text.

Endoscope system comprising calibration means and calibration method thereof

Life of this patent

Endoscope system comprising calibration means and calibration method thereof

Life of this patent

Abstract

Claims13