Digitised parish records and scanned family albums have made it easier to collect faces from four or five generations, but comparing them is still guesswork. This is where a face similarity test (https://www.caracomp.com/fa ...) can settle a long-running argument, or at least reframe it. You upload two photos, the tool measures things like eye spacing, nose shape and jawline geometry, and you get a similarity score instead of an opinion. CaraComp does this in the browser on a phone or laptop, which matters when you are sitting in a relative's kitchen with a shoebox of photographs and no time to install anything.
A few practical notes from doing this with my own family. Old photographs are often the weak link: soft focus, heavy retouching and odd lighting all drag the similarity results down, so scan at the highest resolution you can and crop tightly to the face. Compare like with like where possible, roughly the same age and angle. And treat the number as a measurement of how much they look alike, not a verdict on parentage. Two siblings can score lower than two strangers with similar bone structure. The score starts the conversation; the records finish it."
CaraComp AI https://www.caracomp.com/