Patent ID: 11893706
Assignee: NEC CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 13:
14. An image correction method comprising:
acquiring, by a processor, a plurality of band images obtained by imaging a subject;
acquiring, by the processor, a high-resolution image obtained by imaging the subject, the high-resolution image having a resolution that is higher than a resolution of the band images;
by using at least one of the band images as a reference band image and at least one of rest of the band images as an object band image, acquiring, by the processor, a position difference between the object band image and the reference band image;
by respectively using one or more pixels of the object band image as one or more object pixels, for each object pixel, determining, by the processor, a pixel value of each of a plurality of sub regions obtained by dividing an imaging region of the object pixel, on a basis of a pixel value of the object pixel and a relationship between pixel values of a plurality of pixels of the high-resolution image corresponding to the object pixel, and creating, by the processor, a corrected band image that has a pixel value of light on the object band image at a pixel position of the reference band image from the determined pixel value of each of the sub regions and the position difference; and
outputting, by the processor, the corrected band image, wherein
when acquiring the position difference, the reference band image and the object band image are each divided into a plurality of regions, and for each of the regions, calculating a shift quantity with which the region of the object band image most closely matches the region of the reference band image is calculated as the position difference of all pixels of the region of the object band image, and the position difference of a pixel other than the pixel at the center position is calculated by interpolation processing from the position difference of the pixel at the center position.