Image processing device, image capturing device, image processing method, and storage medium

An image processing method comprising:

• generating, by one or more processors, a high-resolution combined image by aligning a plurality of time-series images with each other in a high-resolution image space having a resolution higher than the plurality of time-series images based on an amount of displacement between the plurality of time-series images, and combining the plurality of time-series images;
• generating, by the one or more processors, at least two low-resolution combined images by generating at least two groups each composed of at least two images by dividing the plurality of time-series images in the time direction, aligning the at least two images in each of the groups with each other in a low-resolution image space having a resolution equal to or lower than the resolution of the plurality of time-series images based on the amount of displacement, and combining the at least two images through weighted addition;
• calculating, by the one or more processors, in each region, a feature quantity pertaining to a correlation between the generated at least two low-resolution combined images;
• and
• correcting, by the one or more processors, the high-resolution combined image based on the calculated feature quantity.

A non-transitory computer-readable storage medium storing an image processing program for causing a computer to execute processes comprising:

• generating a high-resolution combined image by aligning a plurality of time-series images with each other in a high-resolution image space having a resolution higher than the plurality of time-series images based on an amount of displacement between the plurality of time-series images, and combining the plurality of time-series images;
• generating at least two low-resolution combined images by generating at least two groups each composed of at least two images by dividing the plurality of time-series images in the time direction, aligning the at least two images in each of the groups with each other in a low-resolution image space having a resolution equal to or lower than the resolution of the plurality of time-series images based on the amount of displacement, and combining the at least two images through weighted addition;
• calculating, in each region, a feature quantity pertaining to a correlation between the generated at least two low-resolution combined images;
• and
• correcting the high-resolution combined image based on the calculated feature quantity.