Fig. 1

Conceptual illustration of video hashing for authentication with maximized robustness. Red hollow triangle represents feature of original video. Small circles and rectangles represent features of similar and dissimilar video. The feature offset lambda can define a new boundary shown in green dotted circle, with new feature green triangle as its feature center and new radius epsilon 2 as its robustness. Compared with its former robustness epsilon 1, the robustness is maximized but without loss of sensitivity