Methods and apparatuses for generating co-salient thumbnails for digital images

A system, comprising:

• a processor;
• a memory comprising instructions stored thereon that, responsive to execution by the processor, perform operations comprising:
• identifying a first image and a second image;
• calculating a first distance map for each of a plurality of areas in the first image with respect to corresponding areas in the second image;
• selecting a first crop window within the first image that includes one or more areas in the first image that are farthest, in the first distance map, from their corresponding areas in the second image;
• and
• creating a first thumbnail image for the first image based, at least in part, on the first crop window, the first thumbnail image highlighting a salient difference in the first image relative to the second image.

A non-transitory computer-readable storage medium having instructions stored thereon that, upon execution by a computer system, cause the computer system to perform operations comprising:

• identifying a first image and a second image;
• determining, for a first area within the first image, a first corresponding area within the second image;
• calculating a first distance between the first area and the first corresponding area;
• determining, for a second area within the first image, a second corresponding area within the second image;
• calculating a second distance between the second area and the second corresponding area;
• selecting the first area in response to the first distance being greater than the second distance;
• and
• creating a thumbnail image for the first image based, at least in part, on the selected area, the thumbnail image for the first image highlighting a salient difference in the first image relative to the second image.