Commercial Digital Camera to Estimate Postharvest Leaf Area Index in Vitis vinifera L. cv. Cabernet Sauvignon on a Vertical Trellis

The leaf area index (LAI) of a vineyard (Vitis vinifera L.) cv. Cabernet Sauvignon located in the commune of Cauquenes, Maule Region in Chile, was estimated from digital images obtained with a commercial camera using two indirect methods: Leaf Area Gap and Brightness (LAGB) and -Photogrammetric Leaf...

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Autores principales:	Espinosa L.,Miguel, Acuña C.,Eduardo, Espinosa B.,Miguel, Barrera B.,Juan
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2010
Materias:	Vitis vinifera leaf area index digital image photographic camera
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000200015
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spelling	oai:scielo:S0718-583920100002000152018-10-01Commercial Digital Camera to Estimate Postharvest Leaf Area Index in Vitis vinifera L. cv. Cabernet Sauvignon on a Vertical TrellisEspinosa L.,MiguelAcuña C.,EduardoEspinosa B.,MiguelBarrera B.,Juan Vitis vinifera leaf area index digital image photographic camera The leaf area index (LAI) of a vineyard (Vitis vinifera L.) cv. Cabernet Sauvignon located in the commune of Cauquenes, Maule Region in Chile, was estimated from digital images obtained with a commercial camera using two indirect methods: Leaf Area Gap and Brightness (LAGB) and -Photogrammetric Leaf Area Quantification System (PLAQS). The latter requires deleafing of the grapevine. In a normalized difference vegetation index (NDVI) map, three points of vine vigor were selected: high, medium, and low for which horizontal and vertical images were obtained. Images were filtered with the Arc View GIS 3.1 program to provide only leaf images and corresponding pixel numbers. Image area and square meters per linear meter were calculated. The best models were selected from three linear regression adjustments: i) LAI of LAGB vertical images of with LAI of PLAQS, ii) LAI of PLAQS horizontal images with and, iii) LAI of both types of images with PLAQS. The parameters in all models were significant. Adjustment between the LAGB and PLAQS vertical images provides greater simplicity and easy calculation since it requires only a vertical image to estimate LAI. Images thus obtained can accurately estimate LAI in this type of cultivar.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.70 n.2 20102010-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000200015en10.4067/S0718-58392010000200015
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Vitis vinifera leaf area index digital image photographic camera
spellingShingle	Vitis vinifera leaf area index digital image photographic camera Espinosa L.,Miguel Acuña C.,Eduardo Espinosa B.,Miguel Barrera B.,Juan Commercial Digital Camera to Estimate Postharvest Leaf Area Index in Vitis vinifera L. cv. Cabernet Sauvignon on a Vertical Trellis
description	The leaf area index (LAI) of a vineyard (Vitis vinifera L.) cv. Cabernet Sauvignon located in the commune of Cauquenes, Maule Region in Chile, was estimated from digital images obtained with a commercial camera using two indirect methods: Leaf Area Gap and Brightness (LAGB) and -Photogrammetric Leaf Area Quantification System (PLAQS). The latter requires deleafing of the grapevine. In a normalized difference vegetation index (NDVI) map, three points of vine vigor were selected: high, medium, and low for which horizontal and vertical images were obtained. Images were filtered with the Arc View GIS 3.1 program to provide only leaf images and corresponding pixel numbers. Image area and square meters per linear meter were calculated. The best models were selected from three linear regression adjustments: i) LAI of LAGB vertical images of with LAI of PLAQS, ii) LAI of PLAQS horizontal images with and, iii) LAI of both types of images with PLAQS. The parameters in all models were significant. Adjustment between the LAGB and PLAQS vertical images provides greater simplicity and easy calculation since it requires only a vertical image to estimate LAI. Images thus obtained can accurately estimate LAI in this type of cultivar.
author	Espinosa L.,Miguel Acuña C.,Eduardo Espinosa B.,Miguel Barrera B.,Juan
author_facet	Espinosa L.,Miguel Acuña C.,Eduardo Espinosa B.,Miguel Barrera B.,Juan
author_sort	Espinosa L.,Miguel
title	Commercial Digital Camera to Estimate Postharvest Leaf Area Index in Vitis vinifera L. cv. Cabernet Sauvignon on a Vertical Trellis
title_short	Commercial Digital Camera to Estimate Postharvest Leaf Area Index in Vitis vinifera L. cv. Cabernet Sauvignon on a Vertical Trellis
title_full	Commercial Digital Camera to Estimate Postharvest Leaf Area Index in Vitis vinifera L. cv. Cabernet Sauvignon on a Vertical Trellis
title_fullStr	Commercial Digital Camera to Estimate Postharvest Leaf Area Index in Vitis vinifera L. cv. Cabernet Sauvignon on a Vertical Trellis
title_full_unstemmed	Commercial Digital Camera to Estimate Postharvest Leaf Area Index in Vitis vinifera L. cv. Cabernet Sauvignon on a Vertical Trellis
title_sort	commercial digital camera to estimate postharvest leaf area index in vitis vinifera l. cv. cabernet sauvignon on a vertical trellis
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000200015
work_keys_str_mv	AT espinosalmiguel commercialdigitalcameratoestimatepostharvestleafareaindexinvitisviniferalcvcabernetsauvignononaverticaltrellis AT acunaceduardo commercialdigitalcameratoestimatepostharvestleafareaindexinvitisviniferalcvcabernetsauvignononaverticaltrellis AT espinosabmiguel commercialdigitalcameratoestimatepostharvestleafareaindexinvitisviniferalcvcabernetsauvignononaverticaltrellis AT barrerabjuan commercialdigitalcameratoestimatepostharvestleafareaindexinvitisviniferalcvcabernetsauvignononaverticaltrellis
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Commercial Digital Camera to Estimate Postharvest Leaf Area Index in Vitis vinifera L. cv. Cabernet Sauvignon on a Vertical Trellis

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