I compared my face with Natasha’s in my memory, then for completeness, compared some other random Quinlan faces. Facial recognition software, at least the Terran version, didn’t do a full "recognition" the way a person would. The computer match was done by comparing the spatial relation between significant and easily recognizable points on the face, like pupils, ends of the mouth, nostrils, point of the chin, and so forth. This simplified algorithm saved a lot of processing time and was good enough for most purposes.