Patents by Inventor TZI-HUNG CHUNG

TZI-HUNG CHUNG 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).

  • Method of evaluating image correlation with speckle patter
    Patent number: 9116854
    Abstract: An image correlation for images having speckle pattern is evaluated. Modulation transfer function (MTF) curves of speckle-pattern images captured at different times are figured out. Whether a correlation value between the MTF curves meets a threshold is checked. If the correlation value is smaller than the threshold, speckle-pattern images are re-selected for re-figuring out the MTF curves and the correlation value. Thus, error of strain and displacement for digital image correlation owing to blurring images of the on-moving target object is figured out; calculation time of the digital image correlation is reduced; and accuracy on measuring physical parameters of the target object before and after movement is improved for digital image correlation.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: August 25, 2015
    Assignee: National Applied Research Laboratories
    Inventors: Chi-Hung Huang, Wei-Chung Wang, Yung-Hsiang Chen, Tzi-Hung Chung, Tai-Shan Liao
  • Method of Evaluating Image Correlation with Speckle Patter
    Publication number: 20150093043
    Abstract: An image correlation for images having speckle pattern is evaluated. Modulation transfer function (MTF) curves of speckle-pattern images captured at different times are figured out. Whether a correlation value between the MTF curves meets a threshold is checked. If the correlation value is smaller than the threshold, speckle-pattern images are re-selected for re-figuring out the MTF curves and the correlation value. Thus, error of strain and displacement for digital image correlation owing to blurring images of the on-moving target object is figured out; calculation time of the digital image correlation is reduced; and accuracy on measuring physical parameters of the target object before and after movement is improved for digital image correlation.
    Type: Application
    Filed: October 2, 2013
    Publication date: April 2, 2015
    Applicant: National Applied Research Laboratories
    Inventors: CHI-HUNG HUANG, WEI-CHUNG WANG, YUNG-HSIANG CHEN, TZI-HUNG CHUNG, TAI-SHAN LIAO