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DOI: | 10.21273/HORTSCI.34.3.443D |
Web URL(s): | https://journals.ashs.org/hortsci/view/journals/hortsci/34/3/article-p443D.xml?rskey=Sv3OCl Last checked: 11/15/2019 Requires: PDF Reader Notes: Item is within a single large file; Abstract only |
Publication Type:
| Report |
Content Type: | Abstract or Summary only |
Author(s): | Wiest, Steven C. |
Author Affiliation: | Department HFRR, Kansas State University, Manhattan, KS |
Title: | Characteristic dimension: A novel adjunct to analyzing species composition in digitzed photos of turfgrass plots |
Section: | Crop protection Other records with the "Crop protection" Section
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Meeting Info.: | 96th Annual International Conference of the American Society for Horticultural Science, Minneapolis, MN: July 27-31, 1999 |
Source: | HortScience. Vol. 34, No. 3, June 1999, p. 443. |
Publishing Information: | Alexandria, VA: American Society for Horticultural Science |
# of Pages: | 1 |
Keywords: | TIC Keywords: Photography; Cynodon; Bouteloua dactyloides; Festuca arundinacea; Zoysia; Differentiation; Species identification
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Abstract/Contents: | "Digitized photographic images of turf plots composed of bermudagrass, buffalo grass, tall fescue, and zoysiagrass were taken at a height of about 150 cm with a 28-mm lens. Fast Fourier transforms of these images were performed, and a radial plot of the power spectrum was obtained from each image. Hurst plots (log frequency v. log intensity) were used to subract "background" from the power spectra, so peaks would be more evident. The peak of the power spectrum occurs at the average spacing between leaves (more precisely, between areas of the canopy that reflects a signifcant amount of light) and defines the characteristic dimension. Zoysiagrass had the lowest characteristic dimension, while tall fescue had the highest. The width of the power spectrum is indicative of the variability of the characteristic dimension within the canopy. The minimum characteristic dimension (occurring at the highest frequency) was less than 1.7 cm, whereas all the other species had about the same minimum characteristic dimension of ≅ 1.9 cm. The maximum characteristic dimension was greatest for fescue (6.9 cm), followed by buffalo grass (3.8 cm), bermudagrass (3.3 cm), and zoysiagrass (2.8 cm). These results indicate that the characteristic dimension can be a useful tool for discriminating between turfgrass species in digitized images." |
Language: | English |
References: | 0 |
Note: | This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Wiest, S. C. 1999. Characteristic dimension: A novel adjunct to analyzing species composition in digitzed photos of turfgrass plots. HortScience. 34(3):p. 443. |
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| DOI: 10.21273/HORTSCI.34.3.443D |
| Web URL(s): https://journals.ashs.org/hortsci/view/journals/hortsci/34/3/article-p443D.xml?rskey=Sv3OCl Last checked: 11/15/2019 Requires: PDF Reader Notes: Item is within a single large file; Abstract only |
| MSU catalog number: SB 1 .H64 |
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