Patent ID: 7684595

Claim:
A method comprising: (a) providing an original image of a first target; (b) guidedly perturbing the original image towards a second, different target to generate a plurality of recognizable uniquely perturbed images, each of the plurality of recognizable uniquely perturbed images being recognizable as representing the first target and distinguishable from the original image; (c) guidedly perturbing the original image toward the second, different target to generate a plurality of unrecognizable uniquely perturbed images, each of the plurality of unrecognizable uniquely perturbed images being unrecognizable as representing the first target; (d) generating a contour between the plurality of recognizable uniquely perturbed images and the plurality of unrecognizable uniquely perturbed images; (e) guidedly perturbing the original image to generate a plurality of recognizable test set images; (f) guidedly perturbing the original image to generate a plurality of unrecognizable test set images; and (g) determining whether the contour excludes a first percentage of the plurality of unrecognizable test set images and includes a second percentage of the plurality of recognizable test set images.