A few years from now, cameras and vision software will be advanced enough to recognize a person just by analyzing the small differences in colors of the clothes

A few years from now, cameras and vision software will be advanced enough to recognize a person just by analyzing the small differences in colors of the clothes, how s/he walks or mapping micro scratches on his/her car without any need to take pictures of either the plate or the face. I'm also pretty sure we could already build a model of a walking person or animal just by having it walk or run on a weight sensors equipped mat, so that after due training recording when someone walks in or out of a place would be doable without cameras. The ban should be on the final purpose, that is, pervasive generic surveillance. Otherwise it keeps being a moving target in which the most powerful party is constantly one or more steps ahead.