This application is a National Stage Entry of PCT/JP2018/038865 filed on Oct. 18, 2018 which claims priority from Japanese Patent Application No. 2017-210360 filed Oct. 31, 2017, the contents of all of which are incorporated herein by reference, in their entirety.

TECHNICAL FIELD

The invention relates to an image processing apparatus, an image processing method, and a storage medium.

BACKGROUND ART

Patent Literature 1 discloses an image component separation apparatus that separates an abnormal component in an input medical image. The image component separation apparatus disclosed in Patent Literature 1 generates, from an input medical image representing a predetermined structure in a subject, a normal image representing normal structure of the structure in the subject. Then, a difference between the input medical image and the normal image is calculated to separate an abnormal component in the input medical image.

CITATION LIST

Patent Literature

PTL 1: Japanese Patent No. 4895204

SUMMARY OF INVENTION

Technical Problem

However, the image component separation apparatus disclosed in Patent Literature 1 generates a normal image from the whole input medical image representing a predetermined structure in the subject. Thus, in the image component separation apparatus disclosed in Patent Literature 1, since the generated normal image may be affected by the whole input medical image, separation of an abnormal component may be significantly affected by an individual difference of the input medical images.

In view of the problem described above, the present invention intends to provide an image processing apparatus, an image processing method, and a storage medium that can distinguish an anomaly while reducing influence of an individual difference of images.

Solution to Problem

According to one example aspect of the present invention, provided is an image processing apparatus including: a generation unit that uses a part of an inspection image including an inspection target to generate an estimation image including at least a predetermined region of the inspection target; a comparison unit that compares the estimation image generated by the generation unit with the inspection image; and an output unit that outputs a comparison result obtained by the comparison unit.

According to another example aspect of the present invention, provided is an image processing method including: a generation step of using a part of an inspection image including an inspection target to generate an estimation image including at least a predetermined region of the inspection target; a comparison step of comparing the estimation image generated by the generation step with the inspection image; and an output step of outputting a comparison result obtained by the comparison step.

According to yet another example aspect of the present invention, provided is a storage medium storing a program that causes a computer to perform: a generation step of using a part of an inspection image including an inspection target to generate an estimation image including at least a predetermined region of the inspection target; a comparison step of comparing the estimation image generated by the generation step with the inspection image; and an output step of outputting a comparison result obtained by the comparison step.

According to yet another example aspect of the present invention, provided is an image processing apparatus including: a generation unit that uses a part of a first image including an object to generate a second image including at least a predetermined region of the object; a comparison unit that compares the second image generated by the generation unit with the first image; and an output unit that outputs a comparison result obtained by the comparison unit.

Advantageous Effects of Invention

According to the present invention, it is possible to distinguish an anomaly at high accuracy while reducing influence of an individual difference of images.

