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000052406 0247_ $$2DOI$$a10.1111/j.1365-3040.2007.01702.x
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000052406 041__ $$aeng
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000052406 084__ $$2WoS$$aPlant Sciences
000052406 1001_ $$0P:(DE-Juel1)VDB62682$$aBiskup, B.$$b0$$uFZJ
000052406 245__ $$aA stereo imaging system for measuring structural parameters of plant canopies
000052406 260__ $$aOxford [u.a.]$$bWiley-Blackwell$$c2007
000052406 300__ $$a1299 - 1308
000052406 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000052406 440_0 $$04976$$aPlant, Cell and Environment$$v30$$x0140-7791
000052406 500__ $$aRecord converted from VDB: 12.11.2012
000052406 520__ $$aPlants constantly adapt their leaf orientation in response to fluctuations in the environment, to maintain radiation use efficiency in the face of varying intensity and incidence direction of sunlight. Various methods exist for measuring structural canopy parameters such as leaf angle distribution. However, direct methods tend to be labour-intensive, while indirect methods usually give statistical information on stand level rather than on individual leaves. We present an area-based, binocular stereo system composed of commercially available components that allows three-dimensional reconstruction of small- to medium-sized canopies on the level of single leaves under field conditions. Spatial orientation of single leaves is computed with automated processes using modern, well-established stereo matching and segmentation techniques, which were adapted for the properties of plant canopies, providing high spatial and temporal resolution (angle measurements with an accuracy of approx. +/-5 degrees and a maximum sampling rate of three frames per second). The applicability of our approach is demonstrated in three case studies: (1) the dihedral leaflet angle of an individual soybean was tracked to monitor nocturnal and daytime leaf movement showing different frequencies and amplitudes; (2) drought stress was diagnosed in soybean by quantifying changes in the zenith leaflet angle distribution; and (3) the diurnal course of the zenith leaf angle distribution of a closed soybean canopy was measured.
000052406 536__ $$0G:(DE-Juel1)FUEK407$$2G:(DE-HGF)$$aTerrestrische Umwelt$$cP24$$x0
000052406 588__ $$aDataset connected to Web of Science, Pubmed
000052406 650_2 $$2MeSH$$aCircadian Rhythm
000052406 650_2 $$2MeSH$$aDisasters
000052406 650_2 $$2MeSH$$aImage Processing, Computer-Assisted: methods
000052406 650_2 $$2MeSH$$aImaging, Three-Dimensional
000052406 650_2 $$2MeSH$$aPlant Leaves: anatomy & histology
000052406 650_2 $$2MeSH$$aSoybeans: anatomy & histology
000052406 650_2 $$2MeSH$$aTime Factors
000052406 650_7 $$2WoSType$$aJ
000052406 65320 $$2Author$$acanopy
000052406 65320 $$2Author$$aleaf movement
000052406 65320 $$2Author$$ascreening
000052406 65320 $$2Author$$astereo imaging
000052406 65320 $$2Author$$asystems biology
000052406 65320 $$2Author$$a3D reconstruction
000052406 7001_ $$0P:(DE-Juel1)129394$$aScharr, H.$$b1$$uFZJ
000052406 7001_ $$0P:(DE-Juel1)129402$$aSchurr, U.$$b2$$uFZJ
000052406 7001_ $$0P:(DE-Juel1)129388$$aRascher, U.$$b3$$uFZJ
000052406 773__ $$0PERI:(DE-600)2020843-1$$a10.1111/j.1365-3040.2007.01702.x$$gVol. 30, p. 1299 - 1308$$p1299 - 1308$$q30<1299 - 1308$$tPlant, cell & environment$$v30$$x0140-7791$$y2007
000052406 8567_ $$uhttp://dx.doi.org/10.1111/j.1365-3040.2007.01702.x
000052406 909CO $$ooai:juser.fz-juelich.de:52406$$pVDB
000052406 9131_ $$0G:(DE-Juel1)FUEK407$$bErde und Umwelt$$kP24$$lTerrestrische Umwelt$$vTerrestrische Umwelt$$x0
000052406 9141_ $$y2007
000052406 915__ $$0StatID:(DE-HGF)0010$$aJCR/ISI refereed
000052406 9201_ $$0I:(DE-Juel1)ICG-3-20090406$$d31.10.2010$$gICG$$kICG-3$$lPhytosphäre$$x1
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