Yeah, it's really annoying to open a file and see it has 50 names for some ornament, all indistinguishable, but not binary identical.
I use Irfanview's Thumbnail view, then rename in Sigil to a common prefix, then use a regex to make all similar images link to one image, remove unused images.
This can reduce the filesize by 50% or more and make the code more intelligible.
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