公开(公告)号：US20240386741A1

公开(公告)日：2024-11-21

申请号：US18650129

申请日：2024-04-30

Applicant: PixArt Imaging Inc.

Inventor： YU-JU LEE ,  TZUNG-MIN SU

IPC: G06V40/13 ,  G06V40/10 ,  G06V40/12 ,  H04N23/71 ,  H04N23/72 ,  H04N23/73 ,  H04N23/74 ,  H04N25/50

Abstract: There is provided a finger detection device including a light source, a light sensor and a processor. The light sensor respectively captures a first image frame and a second image frame corresponding to turning on and turning off the light source. The processor calculates a differential image frame of the first image frame and the second image frame, determines a covered region in the differential image frame and identifies whether the covered region is a finger region or not. If the covered region is not the finger region, the processor controls the light sensor to acquire new image frames. If the covered region is the finger region, the processor determines different windows of interest in the finger region.