Characterization of the Light Environment in Canopies Using 3D Digitising and Image Processing

Abstract A method to measure light interception by vegetation canopies is presented which uses a 3D digitiser and image processing software. The 3D digitiser allows for simultaneous acquisition of the spatial co-ordinates of leaf locations and orientations. Software for image synthesis is used to make virtual photographs of the real canopy. Information on light interception is derived from the virtual images by using simple features of image analysis software. The method is applied to cotton, grapevine and young mango plants. Calculations are made of light interception at the canopy level, light partitioning between plant organs, vertical profiles of light interception, fisheye photographs and leaf irradiance distribution.

[1]  A.R.G. Lang,et al.  Leaf orientation of a cotton plant , 1973 .

[2]  F. Raab,et al.  Magnetic Position and Orientation Tracking System , 1979, IEEE Transactions on Aerospace and Electronic Systems.

[3]  J. Ross.  The radiation regime and architecture of plant stands , 1981, Tasks for vegetation sciences 3.

[4]  P. Nobel,et al.  Modeling of par interception and productivity by Opuntia ficus-indica , 1985 .

[5]  R. Myneni,et al.  A procedural approach for studying the radiation regime of infinite and truncated foliage spaces. Part I. Theoretical considerations , 1985 .

[6]  M. A. Wolf,et al.  Portable monitor for solar radiation that accumulates irradiance histograms for 32 leaf-mounted sensors , 1985 .

[7]  A. Marshak,et al.  Calculation of canopy bidirectional reflectance using the Monte Carlo method , 1988 .

[8]  Marc Jaeger,et al.  Plant models faithful to botanical structure and development , 1988, SIGGRAPH.

[9]  J. D. Dulk.  The interpretation of remote sensing : a feasibility study , 1989 .

[10]  Przemyslaw Prusinkiewicz,et al.  The Algorithmic Beauty of Plants , 1990, The Virtual Laboratory.

[11]  Robert W. Pearcy,et al.  Sunfleck dynamics in relation to canopy structure in a soybean (Glycine max (L.) Merr.) canopy , 1990 .

[12]  H. Sinoquet,et al.  Estimating the three-dimensional geometry of a maize crop as an input of radiation models: comparison between three-dimensional digitizing and plant profiles , 1991 .

[13]  B. Andrieu,et al.  Use of radiance measurements to assess the position of phytoelements in a vegetation canopy , 1993 .

[14]  C. Varlet-Grancher,et al.  Crop Structure and Light Microclimate: Characterization and Applications , 1993 .

[15]  Reinhart Ceulemans,et al.  Measurement of gap fraction of fractal generated canopies using digitalized image analysis , 1993 .

[16]  J. Buwalda,et al.  Use of Interactive Computer Graphics for Simulation of Radiation Interception and Photosynthesis for Canopies of Kiwifruit Vines with Heterogeneous surface Shape and Leaf Area Distribution , 1993 .

[17]  H. Sinoquet,et al.  DALI: An automated laser distance system for measuring profiles of vegetation , 1993 .

[18]  Hervé Sinoquet,et al.  Evaluation of structure description requirements for predicting gap fraction of vegetation canopies , 1993 .

[19]  P. B. Lombard,et al.  Environmental and Management Practices Affecting Grape Composition and Wine Quality - A Review , 1993, American Journal of Enology and Viticulture.

[20]  K. Hirano,et al.  Contribution of Lateral and Primary Leaves to the Development and Quality of 'Kyoho' Grape Berry , 1994 .

[21]  B. Andrieu,et al.  Computer stereo plotting for 3-D reconstruction of a maize canopy , 1995 .

[22]  Ecophysiology of tropical intercropping , 1995 .

[23]  P. Prusinkiewicz,et al.  Virtual plants: new perspectives for ecologists, pathologists and agricultural scientists , 1996 .

[24]  J. P. Curtis,et al.  A FAST AND EFFECTIVE METHOD OF MEASURING TREE STRUCTURE IN 3 DIMENSIONS , 1996 .

[25]  H. Sinoquet,et al.  Measurement and visualization of the architecture of an adult tree based on a three-dimensional digitising device , 1997, Trees.

[26]  B. Moulia,et al.  Spatial re-orientation of maize leaves affected by initial plant orientation and density , 1997 .

[27]  Christophe Godin,et al.  Interactions between light and plant architecture in an agroforestry walnut tree , 1997 .

[28]  Hervé Sinoquet,et al.  Leaf orientation and sunlit leaf area distribution in cotton , 1997 .

[29]  Hervé Sinoquet,et al.  Foliage determinants of light interception in sunny and shaded branches of Fagus sylvatica (L.) , 1998 .