Patents by Inventor William F. Lohry

William F. Lohry 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).

  • 3D shape measurement using dithering
    Patent number: 8929644
    Abstract: A method for three-dimensional (3D) shape measurement includes generating fringe patterns using a dithering technique, projecting the fringe patterns onto an object using a projector, capturing the fringe patterns distorted by surface geometry of the object using an imaging device, and performing a fringe analysis to reconstruct a 3D shape of the object using the fringe patterns and the fringe patterns distorted by the surface geometry of the object. The step of generating the fringe patterns using the dithering technique may include binarizing sinuisoidal fringe patterns with the dithering technique. The step of generating the fringe patterns using the dithering technique may include applying an optimization algorithm.
    Type: Grant
    Filed: January 2, 2013
    Date of Patent: January 6, 2015
    Assignee: Iowa State University Research Foundation
    Inventors: Song Zhang, Yajun Wang, William F. Lohry
  • 3D SHAPE MEASUREMENT USING DITHERING
    Publication number: 20140064603
    Abstract: A method for three-dimensional (3D) shape measurement includes generating fringe patterns using a dithering technique, projecting the fringe patterns onto an object using a projector, capturing the fringe patterns distorted by surface geometry of the object using an imaging device, and performing a fringe analysis to reconstruct a 3D shape of the object using the fringe patterns and the fringe patterns distorted by the surface geometry of the object. The step of generating the fringe patterns using the dithering technique may include binarizing sinuisoidal fringe patterns with the dithering technique. The step of generating the fringe patterns using the dithering technique may include applying an optimization algorithm.
    Type: Application
    Filed: January 2, 2013
    Publication date: March 6, 2014
    Inventors: Song Zhang, Yajun Wang, William F. Lohry