公开(公告)号：US20210064151A1

公开(公告)日：2021-03-04

申请号：US16558336

申请日：2019-09-03

Applicant: PixArt Imaging Inc.

Inventor： BOON-HOW KOK ,  KEEN-HUN LEONG ,  Ching Geak CHAN

IPC: G06F3/03 ,  G06T1/00 ,  G06T1/20 ,  G06T1/60

Abstract: An optical detecting device with a tracking function includes an image acquiring module and a processor. The image acquiring module is grouped into a first cluster and a second cluster of pixels. The first cluster and the second cluster are arranged adjacent to each other, and used to respectively acquire a first imaging result and a second imaging result both containing an indicating mark. The processor is electrically connected to the image acquiring module and adapted to track a proceeding direction of the indicating mark by computing difference between the first imaging result and the second imaging result. The optical detecting device further includes a memory module electrically connected to the processor, and the processor analyzes the computed difference via a lookup table stored inside the memory module to determine the proceeding direction.

公开(公告)号：US20220390646A1

公开(公告)日：2022-12-08

申请号：US17336326

申请日：2021-06-02

Applicant: PixArt Imaging Inc.

Inventor： Ching Geak CHAN ,  Chung-Ting Yang ,  Feng-Chi Liu

IPC: G01V8/10 ,  G06T7/246

Abstract: An optical tracking device is used to track a target object. An outer surface of the target object is divided into a first region and a second region adjacent to each other, and a marker is disposed on the first region. The optical tracking device includes an optical sensor and an operation processor. The optical sensor has auto exposure function and is adapted to acquire a detection image containing at least one of the first region and the second region. The operation processor is electrically connected to the optical sensor and adapted to analyze variation of an exposure parameter of the auto exposure function for determining whether the first region is appeared in the detection image, so as to acquire an operation datum of the target object.

公开(公告)号：US20210065385A1

公开(公告)日：2021-03-04

申请号：US16937612

申请日：2020-07-24

Applicant: PixArt Imaging Inc.

Inventor： Kevin Len-Li LIM ,  Joon Chok LEE ,  Zi Hao TAN ,  Ching Geak CHAN ,  KEEN-HUN LEONG

IPC: G06T7/254 ,  G06T7/246 ,  H04N7/18

Abstract: A security camera with a motion detection function, which comprises: an image sensor, configured to capture original images; a variation level computation circuit, configured to compute image variation levels of the original images; a long term computation circuit, configured to calculate a first average level for the image variation levels corresponding to M of the original images; a short term computation circuit, configured to calculate a second average level for the image variation levels corresponding to N of the original images, wherein M>N; and a motion determining circuit, configured to determine whether a motion of an object appears in a detection range of the image sensor according to a relation between the first average level and the second average level. By such security camera, the interference caused by noise or small object can be avoided. Accordingly, the motion detection of the security camera can be more accurate.