Abstract: There are provided an image processing apparatus, an endoscope system, and an image processing method for assisting diagnosis more effectively by calculating more intuitive and useful information than blood vessel information for a blood vessel having a specific thickness. An image processing apparatus includes an image acquisition unit that acquires an endoscope image, a blood vessel extraction unit that extracts a blood vessel having a specific thickness from the endoscope image, a blood vessel information calculation unit that calculates a plurality of pieces of blood vessel information regarding the blood vessel extracted by the blood vessel extraction unit, and a blood vessel parameter calculation unit that calculates a blood vessel parameter, which is relevant to the blood vessel having the specific thickness, by calculation using the blood vessel information.

Abstract: There are provided an image processing apparatus, an endoscope system, and an image processing method for assisting diagnosis more effectively by calculating more intuitive and useful information than blood vessel information for a specific submucosal depth. An image processing apparatus includes an image acquisition unit that acquires an endoscope image, a blood vessel extraction unit that extracts a blood vessel at a specific depth of the observation target from the endoscope image, a blood vessel information calculation unit that calculates blood vessel information regarding the blood vessel extracted by the blood vessel extraction unit, and a blood vessel parameter calculation unit that calculates a blood vessel parameter, which is relevant to the blood vessel at the specific depth, by calculation using the blood vessel information.

Abstract: An image processing unit includes an image acquisition unit, a blood vessel index value acquisition unit, and a blood vessel parameter calculation unit. The image acquisition unit acquires an endoscopic image captured by an endoscope. The blood vessel index value acquisition unit acquires a first blood vessel index value in a first observation condition and a second blood vessel index value in a second observation condition, as blood vessel index values of blood vessels of an observation target, using the endoscopic image acquired by the image acquisition unit. The blood vessel parameter calculation unit calculates a blood vessel parameter, using the first blood vessel index value and the second blood vessel index value.