公开(公告)号：US12277794B1

公开(公告)日：2025-04-15

申请号：US17303623

申请日：2021-06-03

Applicant: AMAZON TECHNOLOGIES, INC.

Inventor： Baomin Wang ,  Umer Shahid ,  Tianyi Wang ,  Georgios Skolianos ,  Rui Zhao ,  Manoj Aggarwal ,  Gerard Guy Medioni

IPC: G06V10/141 ,  G06V10/143 ,  G06V10/56 ,  G06V40/10

Abstract: An input device determines presence of an actual user, instead of an artifact, by using multi-wavelength reflectance spectroscopy. Light sources are operated to illuminate an object with different colors of light at different times. A detector determines, at those different times, intensity data indicative of intensity light of these different colors as reflected from the object. The intensity data is processed to determine whether the object is part of a user or is an artifact. For example, if the object is deemed to be a user, biometric input may be acquired. The biometric input may then be processed to identify the user. The input device may be used at various locations, such as at an entry portal, point of sale, and so forth.