> ..fairly straightforward for Google to detect such groupings and apply the technique to produce synthesized pictures that are better than the originals.
Wouldn't an operation like this require some kind of fine-tuning? Or do diffusion models have a way of using images as context, the way one would provide context to an LLM?
>>fenoma+(OP)
I think simpler algorithms (e.g. image histograms) can get you a long way. Regardless of the mechanism, Google Photos already has the capability to detect similar images, which is used to generate animated gifs.