Evaluation value calculation device and electronic endoscope system

An electronic endoscope system comprising:

• a plotting unit configured to plot pixel correspondence points, which correspond to pixels that constitute an intracavitary color image that has a plurality of color components, on a target plane according to color components of the pixel correspondence points, the target plane intersecting an origin of a predetermined color space;
• an axis setting unit configured to set a reference axis in the target plane based on pixel correspondence points plotted on the target plane;
• and
• an evaluation value calculating unit configured to calculate a prescribed evaluation value with respect to the captured image based on a positional relationship between the reference axis and the pixel correspondence points.

An evaluation value calculation device comprising:

• a plotting unit configured to plot pixel correspondence points, which correspond to pixels that constitute an intracavitary color image that has a plurality of color components, on a target plane according to color components of the pixel correspondence points, the target plane intersecting an origin of a predetermined color space;
• an axis setting unit configured to set a reference axis in the target plane based on pixel correspondence points plotted on the target plane;
• and
• an evaluation value calculating unit configured to calculate a prescribed evaluation value with respect to the captured image based on a positional relationship between the reference axis and the pixel correspondence points.

An evaluation value calculation device comprising:

• an image capturing unit configured to capture a color image that has R (Red), G (Green), and B (Blue) color components;
• a plotting unit configured to plot pixel correspondence points, which correspond to pixels that constitute a captured image obtained by the image capturing unit, on a target plane according to color components of the pixel correspondence points, the target plane including a first axis that is an R component axis and a second axis that is a G component axis and is orthogonal to the first axis;
• an axis setting unit configured to set a reference axis that passes through an intersection of the first axis and the second axis in the target plane and is not parallel with each of the first axis and the second axis, based on pixel correspondence points plotted on the target plane;
• and
• an evaluation value calculating unit configured to calculate a prescribed evaluation value with respect to the captured image based on a positional relationship between the reference axis and the pixel correspondence points.