An image processing device includes: an image acquisition unit configured to acquire images including at least one narrow-band image and having different wavelength component distributions from one another； an absorption information extracting unit configured to extract absorption information from a first image on the basis of a specific frequency component in the first image and correlation between the first image and a second image, the first image being a narrow-band image among the images, the second image being an image different from the first image among the images, the absorption information being image information indicating a change in absorption caused by absorption of narrow-band light used in capturing of the first image by a light absorber； and a display image generating unit configured to generate an image for display by combining the absorption information with at least any one of the images.
