In mobile google there is an option attached to every image in the image search page to "find similar" that takes you to another page of images that VAGUELY pertains to the image its sourcing. maybe a far more improved version of that? i absolutely love the idea of the feature, but google's never really works and Kagi does not (at least from what i can see) have such a feature and would be a huge selling point for me to find images and references easier, spending less time scrolling and instead simply zeroing in on the general image im looking for.
say im looking for pictures of "clothing" for references or inspiration whatever doesn't matter. the search result is all unfocused and varying in colors and styles. i find a blue shirt with long sleeves that i like amongst the pile. i would then use the "show similar" option to take me to a new search result using said image as a source to just ALL blue shirts of varying styles, "blue" being the deciding "similar" keyword in what was used in the search allowing me to focus in on what images im looking for. i could then continue to "search similar" for more specific aspects of the blue shirt like the "long sleeve", a model wearing the shirt/the shirt being standalone, or that the background is white or so. of course eventually there will come a point in which the search is so specific that there simply isnt anything to show, but it is what it is.
google uses a toolbar similar to what im describing to single out images of certain criteria like being a certain color or style, but it only allows one layer of this filter search, and im sure there is a far more "fine-controllable" way of implementing such a valuable feature into Kagi.