An image processing apparatus includes an acquisition unit configured to obtain information indicating a discrepancy in the oxygenation index of a blood vessel related to a region of interest based on image data indicating a spatial distribution of an oxygenation index in a subject and information indicating the blood vessel related to the region of interest, and a display control unit configured to display an image on a display unit based on the information indicating the discrepancy in the oxygenation index of the blood vessel related to the region of interest, the image indicating a condition of a tissue included in the region of interest.
