Document Type

Patent

Publication Date

3-5-2013

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.

Department

Crop, Soil and Environmental Sciences; Horticulture

Patent Number

US8391565

Application Number

US20110286636

Application Published

11-24-2011

Application Filed

5-24-2010

Assignee

Board of Trustees of the University of Arkansas (Little Rock, AK)

Comments

Larry C. Purcell, Department of Crop, Soil and Environmental Sciences; Robert L. Rorie, Department of Crop, Soil and Environmental Sciences; Douglas E. Karcher, Department of Horticulture

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