Three-dimensional human face identification card using micro lens array is proposed based on the introduction of integrated imaging technology into three-dimensional human face identification cards. The traditional ID card is a two-dimensional plane photograph. With the development of integrated imaging technology, each unit lens in the integrated imaging technology can record relative parts of information from various directions, combining a lenticular lens array and a concave lens array to realize naked eye in natural light you can see the three-dimensional photos on the ID card. This technology not only achieves visual three-dimensionality and beauty, but also enhances the security of identity cards, and can be widely applied to various situations requiring authentication.
In this paper, a non-contact, fast and high-precision optical 3D measurement method is proposed to provide a detection scheme for the processing of optical rough glass in the grinding stage. We first use a planar calibration board to map the phase-height of the optical rough glass in a certain spatial range, then use the phase-shifting method to obtain the heightmodulated phase distribution of the rough glass. Finally, the 3D profile of the whole rough glass is obtained based on the phase-height mapping. The whole detection process can be completed in a few minutes, and the accuracy is less than 100 microns.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.