Patents by Inventor Tung-Chan TSAI

Tung-Chan TSAI 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).

  • Autofocus system
    Patent number: 8571403
    Abstract: In an autofocus system, a focus measurement unit receives an image, and accordingly generates an associated focus value. A focus transform unit receives and then transforms the focus value provided by the focus measurement unit, therefore generating an associated transformed focus value. An in-focus position estimation unit obtains an in-focus position, in an analytical manner, according to some transformed focus values and some associated lens positions.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: October 29, 2013
    Assignee: National Taiwan University
    Inventors: Tung-Chan Tsai, Homer H. Chen
  • AUTOFOCUS SYSTEM
    Publication number: 20120243858
    Abstract: In an autofocus system, a focus measurement unit receives an image, and accordingly generates an associated focus value. A focus transform unit receives and then transforms the focus value provided by the focus measurement unit, therefore generating an associated transformed focus value. An in-focus position estimation unit obtains an in-focus position, in an analytical manner, according to some transformed focus values and some associated lens positions.
    Type: Application
    Filed: June 7, 2012
    Publication date: September 27, 2012
    Applicant: NATIONAL TAIWAN UNIVERSITY
    Inventors: Tung-Chan TSAI, Homer H. CHEN