generating a plurality of auxiliary images from a plurality of original images, wherein the plurality of original images includes a low resolution image, a first medium resolution image and a high resolution image, and the high resolution image covers a portion of a content of the low resolution image but with higher resolution, and wherein the plurality of auxiliary images includes a second medium resolution image made blurry by a downsample operation and an upsample operation applied to the first medium resolution image;

obtaining a plurality of feature vectors from the plurality of original images and from the plurality of auxiliary images;

combining, based on a plurality of indices, a higher resolution feature vector with a lower resolution feature vector, and

generating the super resolution image based on the combined feature vectors.