公开(公告)号：US11249561B2

公开(公告)日：2022-02-15

申请号：US17010754

申请日：2020-09-02

Applicant: PixArt Imaging Inc.

Inventor： Kevin Len-Li Lim ,  Rizal Bin Jaffar

IPC: G06F3/03 ,  G06K9/46 ,  G06K9/62 ,  G06F3/0354

Abstract: There is provided a navigation device including an image sensor and a processor. The image sensor outputs a reference frame and a comparison frame. The processor calculates a correlation search window by changing a relative position of the comparison frame with respect to the reference frame. The processor ignores a part of pixel data of the comparison frame without being processed while calculating each correlation value of the correlation search window to reduce total computation load.

公开(公告)号：US10795454B2

公开(公告)日：2020-10-06

申请号：US16152663

申请日：2018-10-05

Applicant: PixArt Imaging Inc.

Inventor： Kevin Len-Li Lim ,  Rizal Bin Jaffar

IPC: G06F3/03 ,  G06K9/46 ,  G06K9/62 ,  G06F3/0354

Abstract: There is provided a navigation device including an image sensor and a processor. The image sensor outputs a reference frame and a comparison frame. The processor calculates a correlation search window by changing a relative position of the comparison frame with respect to the reference frame. The processor ignores a part of pixel data of the comparison frame without being processed while calculating each correlation value of the correlation search window to reduce total computation load.