CanBiPT: Cancelable biometrics with physical template

Abstract

Cancelable biometrics are designed to solve the problem where biological characteristics cannot be cancelled and reissued. At present, most of the cancelable biometrics are carried out in the digital domain, therefore we call them cancelable biometrics with soft-template. In this paper, we propose a method called Cancelable Biometrics with Physical-Template (CanBiPT). The physical-template is a printed sticker that can be worn on the selected region of the face. First, in the face image, we select a specific region referring to the entropy between the faces with and without the physical-template, i.e., the sticker. Second, we generate an image with individual features and this image is called the physical-template which can be printed as a sticker. And the sticker is worn on the selected region of the face in the first step and the face with the sticker is used for authentication, recognition and so on. Different physical-templates can be formed by changing the regions (forehead, nose or mouth) or appearance according to the parameters in the algorithm. At the same time, the image printed as the sticker can also be used for the soft-template. The experiments on the public datasets, i.e., LFW and MS-Celeb-1M datasets and our own dataset, i.e., CanBiPT dataset, demonstrate the feasibility and effectiveness of the proposed method with both physical-templates and soft-templates.