Phase scrambling for blind image matching

We propose a phase-scrambling method for blind image matching, which is a direct image matching between invisible images. The phase scrambling is motivated by visual protection of images and prevention of illegal image matching. Phase-only correlation (POC) can be directly applied to images protected by the proposed phase scrambling in order to estimate similarity and translation between images. POC with synchronized scrambling provides blind image matching, in which phase scrambling does not affect the accuracy of POC. The effect of visual protection and prevention of illegal image matching is evaluated through simulations to show the effectiveness of the proposed method.