Patents by Inventor Lary C. Purcell

Lary C. Purcell 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).

  • Publication number: 20110286636
    Abstract: A system and method of determining nitrogen levels from a digital image. In particular, a method of determining leaf nitrogen concentration and yield from a digital photograph of a fully developed leaf (collared leaf) of a crop of nonlegumes, such as corn, rice, wheat, cotton, potatoes or sugarcane. The digital image is processed to determine a dark green color index (“DGCI”), which is closely related to leaf nitrogen concentration and yield. Standardized color disks having known DGCI values are included in the digital photograph and serve as an internal standard. The internal standard allows correction of DGCI of samples when using different cameras and/or when lighting conditions change.
    Type: Application
    Filed: May 24, 2010
    Publication date: November 24, 2011
    Applicant: Board of Trustees of the University of Arkansas
    Inventors: Lary C. Purcell, Robert L. Rorie, Douglas E. Karcher