Image processing device and method for operating endoscope system
AssigneeFUJIFILM Corporation
InventorMinkyung Chun
Life of this patent
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Abstract
A first signal ratio (−log(B/G)) between a B image signal and a G image signal is calculated. A second signal ratio (−log(G/R)) between the G image signal and an R image signal is calculated. A difference between first and second signal ratios in a first area and first and second signal ratios in a specific area is increased to enhance a color difference between normal mucosa and an abnormal region (an atrophic mucosal region and a deep blood vessel region). The color difference between the normal mucosa and the abnormal region in a case where at least one of the RGB image signals is a narrowband image signal is greater than the color difference in a case where all of the RGB image signals are broadband image signals.
Claims12
A method for operating an endoscope system comprising the steps of:
- inputting image signals of three colors including at least one narrowband image signal, with an image signal inputting unit;
- calculating a first signal ratio between the image signals of predetermined two colors and a second signal ratio between the image signals of two colors different from the first signal ratio, based on the image signals of three colors with a signal ratio calculator;
- performing an expansion process with a color difference enhancer, the expansion process expanding a difference between first and second signal ratios in a first area and first and second signal ratios in a specific area different from the first area;
- and
- displaying a color difference between normal mucosa and an abnormal region on an object of interest greater than a color difference in a case where all of the image signals of three colors are broadband image signals at the time a display unit displays an image in which the color difference between the normal mucosa and the abnormal region on the object of interest is enhanced based on the first and second signal ratios subjected to the expansion process.
An image processing device comprising:
- an image signal receiver that receives image signals of three colors including at least one narrowband image signal;
- a processing circuitry configured for:
- calculating a first signal ratio between the image signals of predetermined two colors and a second signal ratio between the image signals of two colors different from the first signal ratio, based on the image signals of three colors;
- and
- performing an expansion process, the expansion process expanding a difference between first and second signal ratios in a first area and first and second signal ratios in a specific area different from the first area;
- and
- a display that displays an image in which a color difference between normal mucosa and an abnormal region on an object of interest is enhanced based on the first and second signal ratios subjected to the expansion process, the color difference being displayed greater than a color difference in a case where all of the image signals of three colors are broadband image signals.
Dependencies are inferred from the claim text.