Full TGIF Record # 112681
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Web URL(s):http://www.tandfonline.com/doi/pdf/10.1080/00103629809370009
    Last checked: 10/15/2015
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Publication Type:
i
Report
Author(s):Beverly, Reuben B.; van Iersel, Marc W.
Author Affiliation:Department of Horticulture, Georgia Station, University of Georgia, Griffin, Georgia
Title:Calibration of a video image analysis system for measuremnet of stem length, leaf area, and percent ground coverage
Source:Communications in Soil Science and Plant Analysis. Vol. 29, No. 9/10, May 1998, p. 1071-1081.
Publishing Information:New York, NY: Marcel Dekker
# of Pages:11
Keywords:TIC Keywords: Image analysis; Stem length; Leaf area; Percent living ground cover; Evaluative methods; Calibrations
Abstract/Contents:"A relatively low-cost digital measurement system configured with off-the shelf components (a standard consumer High 8-mm camcorder, video cassette recorder, video monitor, desktop computer with image capture board, and image analysis software) has been used in applications from benchtop stem length and leaf area measurements to aerial imaging for precision agriculture applications. However, preliminary research identified a systematic error in estimating leaf area using this system, which further investigation revealed to be caused by the internal calibration method used. Further research was needed to determine appropriate calibration methods for length and area measurements using this system. Length measurements were very accurate and repeatable using a vertical (i.e., parallel to the axis of the objects) two-point calibration. Two-point (vertical, horizontal or diagonal) calibration led to over- or under-estimation of area, but three-point calibration yielded very accurate measurements of area and percent coverage. This system proved to be a versatile and useful method of measuring many plant size parameters."
Language:English
References:5
Note:Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Beverly, R. B., and M. W. van Iersel. 1998. Calibration of a video image analysis system for measuremnet of stem length, leaf area, and percent ground coverage. Commun. Soil. Sci. Plant Anal. 29(9/10):p. 1071-1081.
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Web URL(s):
http://www.tandfonline.com/doi/pdf/10.1080/00103629809370009
    Last checked: 10/15/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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