Optical navigation apparatus, method, and non-transitory computer readable medium thereof
AssigneePixart Imaging Inc.
InventorsYu-Ju LEE, Tzu-Yu CHEN
Life of this patent
Estimating the term…
Abstract
An optical navigation apparatus, an optical navigation method, and a non-transitory computer readable medium thereof are provided. The optical navigation apparatus includes a light source unit, an image sensing unit, and a processing unit. The processing unit is electrically connected to the light source unit and the image sensing unit. The light source unit provides a beam of light. The image sensing unit captures a first image at a first time instant when the light is projected onto a reflection surface. The processing unit calculates an image quality index of the first image and determines a matching block size between the first image and a second image according to the image quality index.
Claims35
An optical navigation apparatus, comprising:
- a light source unit, being configured to provide a beam of light;
- an image sensing unit, being configured to capture a first image at a first time instant when the beam of light is projected onto a reflection surface;
- and
- a processing unit, being electrically connected to the image sensing unit and configured to calculate an image quality index related to the first image and determine a first matching block size related to the first image and a second image according to the image quality index.
An optical navigation method, being adapted to be used in an optical navigation apparatus comprising a light source unit, an image sensing unit, and a processing unit, the optical navigation method comprising the following steps of:
- capturing, by the image sensing unit, a first image at a first time instant when the light source unit projects a beam of light onto a reflection surface;
- calculating, by the processing unit, an image quality index related to the first image;
- and
- determining, by the processing unit, a first matching block size related to the first image and a second image according to the image quality index.
A non-transitory computer readable medium, having a computer program stored therein, the computer program executing an optical navigation method after being loaded into an optical navigation apparatus, the optical navigation apparatus comprising a light source unit, an image sensing unit, and a processing unit, and the computer program comprising:
- code A for capturing a first image at a time instant by the image sensing unit when the light source unit projects a beam of light onto a reflection surface;
- code B for calculating an image quality index related to the first image by the processing unit;
- and
- code C for determining a matching block size related to the first image and a second image according to the image quality index by the processing unit.
Dependencies are inferred from the claim text.