Patents by Inventor Shiau-Jing Liu

Shiau-Jing Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Auto-focus method for a remote sensing satellite and the satellite therefor
    Patent number: 11431888
    Abstract: Auto-focus method and a remote sensing satellite are disclosed. The satellite comprises at least a focal plane assembly (FPA) and a focus adjusting apparatus, the auto-focus method comprises: processing a point spread function (PSF) estimation to a multiple regions of a first image to generate multiple first estimated point spread functions; generating a first average point spread function according to the first estimated point spread functions; processing a Gaussian curve fitting to the first average PSF function and defining a first focus number; processing a PSF estimation to multiple regions of a second image to generate multiple second estimated PSF functions; generating a second average point spread function according to the second estimated point spread functions; processing a Gaussian curve fitting to the second average point spread function and defining a second focus number; and comparing the first focus number and the second focus number.
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: August 30, 2022
    Assignee: National Applied Research Laboratories
    Inventors: Shiau-Jing Liu, Yu-Lin Tsai, Li-Fen Huang
  • AUTO-FOCUS METHOD FOR A REMOTE SENSING SATELLITE AND THE SATELLITE THEREFOR
    Publication number: 20210377439
    Abstract: Auto-focus method and a remote sensing satellite are disclosed. The satellite comprises at least a focal plane assembly (FPA) and a focus adjusting apparatus, the auto-focus method comprises: processing a point spread function (PSF) estimation to a multiple regions of a first image to generate multiple first estimated point spread functions; generating a first average point spread function according to the first estimated point spread functions; processing a Gaussian curve fitting to the first average PSF function and defining a first focus number; processing a PSF estimation to multiple regions of a second image to generate multiple second estimated PSF functions; generating a second average point spread function according to the second estimated point spread functions; processing a Gaussian curve fitting to the second average point spread function and defining a second focus number; and comparing the first focus number and the second focus number.
    Type: Application
    Filed: May 27, 2021
    Publication date: December 2, 2021
    Applicant: National Applied Research Laboratories
    Inventors: Shiau-Jing Liu, Yu-Lin Tsai, Li-Fen Huang