1. A method, comprising: altering selected facial recognition metrics in a digitally-encoded image of a person, by a computer operating an alteration algorithm that identifies an alteration of the selected facial recognition metrics based on a value of Δ = ∑ 1 to M ∂ i _ calculated to substantially reduce risk of automatic recognition of the person while preserving an overall aesthetic quality of the image, wherein δi is a measure of metric alteration of each of a number M of the selected facial recognition metrics; and storing, in a computer memory, an altered digitally-encoded image prepared by the altering of the selected facial recognition metrics in the digitally-encoded image.