公开(公告)号：US20170131800A1

公开(公告)日：2017-05-11

申请号：US15155294

申请日：2016-05-16

Applicant: PIXART IMAGING INC.

Inventor： Guo-Zhen Wang ,  HSUAN-KU CHEN

IPC: G06F3/0354 ,  G06F3/03

CPC classification number: G06F3/03543 ,  G06F3/0304 ,  G06F3/0317

Abstract: The present disclosure illustrates an optical navigation apparatus with defocused image compensation function and a compensation circuit thereof The optical navigation apparatus comprises a light source, an image sensing circuit and a compensation circuit. The light source is configured to illuminate a work surface. The image sensing circuit captures a first image related to the work surface. The compensation circuit is configured to transform the first image and a point spread function of the light source into a first conversion result and a second conversion result in frequency domain, respectively, and then transform a result multiplied by the first conversion result and a reciprocal of the second conversion result from frequency domain to time domain to generate a second image.