To provide pathological support for users to effectively perform follow up on diseases using polarization information obtained from polarization sensitive tomographic images. An image processing apparatus includes a positioning unit (195) configured to position multiple polarization sensitive tomographic images corresponding to multiple tomographic luminance images based on the plurality of tomographic luminance images obtained by photographing an object at different times and a comparing unit (196) configured to compare the plurality of polarization sensitive tomographic images which are positioned.
