Abstract: An image processing device includes a processor and a memory that is provided in or connected to the processor. The processor executes a region selection process of selecting a portion of a plurality of tomographic images, which indicate a plurality of tomographic planes of an object, respectively, and have a first resolution, as a target region to be set to a second resolution higher than the first resolution, a resolution enhancement process of increasing the resolution of the target region to the second resolution to generate a high-resolution partial image, and a composite two-dimensional image generation process of generating a high-resolution composite two-dimensional image having the second resolution, using the high-resolution partial image.

Abstract: An image processing device includes a processor and a memory that is connected to or provided in the processor. The processor acquires a plurality of tomographic images which indicate a plurality of tomographic planes of an object, respectively, and have a first resolution, sets a partial region of the tomographic image as a target region in a case in which an operation instruction related to interpretation is received from a user, performs a process of converting a resolution into a second resolution higher than the first resolution only on the target region to generate a high-resolution partial image of the target region, and displays the high-resolution partial image.

Abstract: A processor derives a linear structure image indicating a high-frequency linear structure from each of a plurality of tomographic images indicating tomographic planes of an object, derives a feature amount indicating features of the linear structure from the linear structure image, selects at least one tomographic image or high-frequency tomographic image including the linear structure or a predetermined tomographic image or high-frequency tomographic image on the basis of the feature amount for each corresponding pixel in each of the tomographic images or the high-frequency tomographic images indicating high-frequency components of the tomographic images, and derive a composite two-dimensional image on the basis of the selected tomographic images or high-frequency tomographic images.