{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,5]],"date-time":"2026-06-05T09:27:35Z","timestamp":1780651655903,"version":"3.54.1"},"reference-count":30,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2016,4,23]],"date-time":"2016-04-23T00:00:00Z","timestamp":1461369600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100007915","name":"Wine Australia","doi-asserted-by":"publisher","award":["UA1207"],"award-info":[{"award-number":["UA1207"]}],"id":[{"id":"10.13039\/501100007915","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Leaf area index (LAI) and plant area index (PAI) are common and important biophysical parameters used to estimate agronomical variables such as canopy growth, light interception and water requirements of plants and trees. LAI can be either measured directly using destructive methods or indirectly using dedicated and expensive instrumentation, both of which require a high level of know-how to operate equipment, handle data and interpret results. Recently, a novel smartphone and tablet PC application, VitiCanopy, has been developed by a group of researchers from the University of Adelaide and the University of Melbourne, to estimate grapevine canopy size (LAI and PAI), canopy porosity, canopy cover and clumping index. VitiCanopy uses the front in-built camera and GPS capabilities of smartphones and tablet PCs to automatically implement image analysis algorithms on upward-looking digital images of canopies and calculates relevant canopy architecture parameters. Results from the use of VitiCanopy on grapevines correlated well with traditional methods to measure\/estimate LAI and PAI. Like other indirect methods, VitiCanopy does not distinguish between leaf and non-leaf material but it was demonstrated that the non-leaf material could be extracted from the results, if needed, to increase accuracy. VitiCanopy is an accurate, user-friendly and free alternative to current techniques used by scientists and viticultural practitioners to assess the dynamics of LAI, PAI and canopy architecture in vineyards, and has the potential to be adapted for use on other plants.<\/jats:p>","DOI":"10.3390\/s16040585","type":"journal-article","created":{"date-parts":[[2016,4,25]],"date-time":"2016-04-25T10:02:36Z","timestamp":1461578556000},"page":"585","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":94,"title":["VitiCanopy: A Free Computer App to Estimate Canopy Vigor and Porosity for Grapevine"],"prefix":"10.3390","volume":"16","author":[{"given":"Roberta","family":"De Bei","sequence":"first","affiliation":[{"name":"School of Agriculture, Food and Wine, Waite Research Institute, the University of Adelaide, PMB 1 Glen Osmond 5064, South Australia, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0377-5085","authenticated-orcid":false,"given":"Sigfredo","family":"Fuentes","sequence":"additional","affiliation":[{"name":"Faculty of Veterinary and Agricultural Sciences, the University of Melbourne, Parkville 3010, Victoria, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0666-3078","authenticated-orcid":false,"given":"Matthew","family":"Gilliham","sequence":"additional","affiliation":[{"name":"School of Agriculture, Food and Wine, Waite Research Institute, the University of Adelaide, PMB 1 Glen Osmond 5064, South Australia, Australia"},{"name":"ARC Centre of Excellence in Plant Energy Biology, Waite Research Institute, PMB 1 Glen Osmond 5064, South Australia, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steve","family":"Tyerman","sequence":"additional","affiliation":[{"name":"School of Agriculture, Food and Wine, Waite Research Institute, the University of Adelaide, PMB 1 Glen Osmond 5064, South Australia, Australia"},{"name":"ARC Centre of Excellence in Plant Energy Biology, Waite Research Institute, PMB 1 Glen Osmond 5064, South Australia, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2718-2329","authenticated-orcid":false,"given":"Everard","family":"Edwards","sequence":"additional","affiliation":[{"name":"CSIRO Agriculture, Waite Campus Laboratory, Private Bag 2, Glen Osmond 5064, South Australia, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicol\u00f2","family":"Bianchini","sequence":"additional","affiliation":[{"name":"CSIRO Agriculture, Waite Campus Laboratory, Private Bag 2, Glen Osmond 5064, South Australia, Australia"},{"name":"Dipartimento di Scienze Agrarie (DipSA), the University of Bologna, Area Colture Arboree, Viale Fanin 46, 40127 Bologna, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jason","family":"Smith","sequence":"additional","affiliation":[{"name":"National Wine and Grape Industry Centre, Charles Sturt University, Locked Bag 588, Wagga Wagga 2678, New South Wales, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cassandra","family":"Collins","sequence":"additional","affiliation":[{"name":"School of Agriculture, Food and Wine, Waite Research Institute, the University of Adelaide, PMB 1 Glen Osmond 5064, South Australia, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2016,4,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"219","DOI":"10.5344\/ajev.1995.46.2.219","article-title":"The light environment within grapevine canopies. II. Influence of leaf area density on fruit zone light environment and some canopy assessment parameters","volume":"46","author":"Dokoozlian","year":"1995","journal-title":"Am. J. Enol. Vitic."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"209","DOI":"10.5344\/ajev.1995.46.2.209","article-title":"The light environment within grapevine canopies. I. Description and seasonal changes during fruit development","volume":"46","author":"Dokoozlian","year":"1995","journal-title":"Am. J. Enol. Vitic."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"230","DOI":"10.5344\/ajev.1985.36.3.230","article-title":"Principles of grapevine canopy microclimate manipulation with implications for yield and quality. A review","volume":"36","author":"Smart","year":"1985","journal-title":"Am. J. Enol. Vitic."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"41","DOI":"10.1093\/oxfordjournals.aob.a083148","article-title":"Comparative physiological studies on the growth of field crops: I. Variation in net assimilation rate and leaf area between species and varieties, and within and between years","volume":"11","author":"Watson","year":"1947","journal-title":"Ann. Bot."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"2403","DOI":"10.1093\/jxb\/erg263","article-title":"Ground-based measurements of leaf area index: A review of methods, instruments and current controversies","volume":"54","year":"2003","journal-title":"J. Exp. Bot."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1070","DOI":"10.1071\/FP08045","article-title":"An automated procedure for estimating the leaf area index (LAI) of woodland ecosystems using digital imagery, matlab programming and its application to an examination of the relationship between remotely sensed and field measurements of LAI","volume":"35","author":"Fuentes","year":"2008","journal-title":"Funct. Plant Biol."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1016\/j.agrformet.2003.08.027","article-title":"Review of methods for in situ leaf area index determination: Part I. Theories, sensors and hemispherical photography","volume":"121","author":"Jonckheere","year":"2004","journal-title":"Agric. Forest Meteorol."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"55","DOI":"10.1016\/S0378-1127(97)00269-7","article-title":"Estimation of leaf area index with the Li-cor LAI 2000 in deciduous forests","volume":"105","author":"Cutini","year":"1998","journal-title":"Forest Ecol. Manag."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1016\/j.agrformet.2003.08.001","article-title":"Review of methods for in situ leaf area index (LAI) determination: Part II. Estimation of lai, errors and sampling","volume":"121","author":"Weiss","year":"2004","journal-title":"Agric. Forest Meteorol."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"1726","DOI":"10.1080\/00103624.2014.907917","article-title":"Estimation of leaf area index and foliage area index of rice using an indirect gravimetric method","volume":"45","author":"Aschonitis","year":"2014","journal-title":"Commun. Soil Sci. Plant Anal."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"696","DOI":"10.21273\/HORTSCI.35.4.696","article-title":"Nondestructive methods to estimate leaf area in vitis vinifera L.","volume":"35","author":"Montero","year":"2000","journal-title":"HortScience"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1111\/ajgw.12019","article-title":"Evaluation of single and dual crop coefficients over a drip-irrigated merlot vineyard (Vitis vinifera L.) using combined measurements of sap flow sensors and an eddy covariance system","volume":"19","year":"2013","journal-title":"Aust. J. Grape Wine Res."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1298","DOI":"10.3390\/rs1041298","article-title":"Measurement of crown cover and leaf area index using digital cover photography and its application to remote sensing","volume":"1","author":"Pekin","year":"2009","journal-title":"Remote Sens."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"756","DOI":"10.1016\/j.foreco.2007.02.021","article-title":"Estimation of leaf area index in eucalypt forest with vertical foliage, using cover and fullframe fisheye photography","volume":"242","author":"Macfarlane","year":"2007","journal-title":"Forest Ecol. Manag."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"176","DOI":"10.1016\/j.agrformet.2006.10.013","article-title":"Estimation of leaf area index in eucalypt forest using digital photography","volume":"143","author":"Macfarlane","year":"2007","journal-title":"Agric. Forest Meteorol."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"465","DOI":"10.1111\/ajgw.12098","article-title":"Automated estimation of leaf area index from grapevine canopies using cover photography, video and computational analysis methods","volume":"20","author":"Fuentes","year":"2014","journal-title":"Aust. J. Grape Wine Res."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.agrformet.2007.05.001","article-title":"Estimating forest leaf area using cover and fullframe fisheye photography: Thinking inside the circle","volume":"146","author":"Macfarlane","year":"2007","journal-title":"Agric. Forest Meteorol."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"2860","DOI":"10.3390\/s150202860","article-title":"Digital cover photography for estimating leaf area index (LAI) in apple trees using a variable light extinction coefficient","volume":"15","author":"Fuentes","year":"2015","journal-title":"Sensors"},{"key":"ref_19","first-page":"56","article-title":"Development of a smartphone application to characterise temporal and spatial canopy architecture and leaf area index for grapevines","volume":"6","author":"Fuentes","year":"2012","journal-title":"Wine Vitic. J."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1016\/j.compag.2013.04.019","article-title":"Development of an app for estimating leaf area index using a smartphone. Trueness and precision determination and comparison with other indirect methods","volume":"96","author":"Confalonieri","year":"2013","journal-title":"Comput. Electron. Agric."},{"key":"ref_21","unstructured":"Confalonieri, R., Francone, C., and Foi, M. (2014, January 15\u201319). The pocketlai smartphone app: An alternative method for leaf area index estimation. Proceedings of the 7th International Congress on Environmental Modelling and Software, San Diego, CA, USA."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"38","DOI":"10.1016\/j.fcr.2013.09.024","article-title":"Comparison of leaf area index estimates by ceptometer and pocketlai smart app in canopies with different structures","volume":"155","author":"Francone","year":"2014","journal-title":"Field Crops Res."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"716","DOI":"10.1111\/avsc.12181","article-title":"Estimating leaf area index in tree species using the pocketlai smart app","volume":"18","author":"Orlando","year":"2015","journal-title":"Appl. Veg. Sci."},{"key":"ref_24","unstructured":"De Bei, R., Hook, J., Fuentes, S., Gilliham, M., Tyerman, S., and Collins, C. (June, January 31). Linking canopy architecture to grape quality using the laicanopy app. Proceedings of the 19th International Symposium GiESCO, Pech Rouge, France."},{"key":"ref_25","unstructured":"De Bei, R., Fuentes, S., Petrie, P., Kidman, C., Hook, J., Gilliham, M., Tyerman, S., and Collins, C. (2014, January 24\u201325). Optimising vine balance in Australian vineyards: Development of a smartphone application to assess leaf area index. Proceedings of the ASVO Mildura Seminar, Mildura, Victoria, Australia."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1016\/j.compag.2016.02.011","article-title":"Automated computation of leaf area index from fruit trees using improved image processing algorithms applied to canopy cover digital photograpies","volume":"123","author":"Mora","year":"2016","journal-title":"Comput. Electron. Agric."},{"key":"ref_27","unstructured":"LI-COR (1992). Lai-2000 Plant Canopy anAlyzer Operating Manual, LI-COR."},{"key":"ref_28","unstructured":"Walker, J., and Tunstall, B.R. (1981). Field Estimation of Foliage Cover in Australian Woody Vegetation, CSIRO, Institute of Biological Resources, Division of Land Use Research."},{"key":"ref_29","unstructured":"Viti Adelaide VitiCanopy. Available online: https:\/\/www.youtube.com\/watch?v=Eqzmuruubm8."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"325","DOI":"10.1016\/0168-1923(89)90052-X","article-title":"Leaf area measurements based on hemispheric photographs and leaf-litter collection in a deciduous forest during autumn leaf-fall","volume":"45","author":"Neumann","year":"1989","journal-title":"Agric. Forest Meteorol."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/16\/4\/585\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T19:22:46Z","timestamp":1760210566000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/16\/4\/585"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,4,23]]},"references-count":30,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2016,4]]}},"alternative-id":["s16040585"],"URL":"https:\/\/doi.org\/10.3390\/s16040585","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2016,4,23]]}}}