Crown envelope shape measurements and models

This paper addresses tree crown envelope shape modeling from the perspective of optical passive remote sensing. The aims are 1) to review the specific requirements of crown shape models and ground measurement techniques in optical remote sensing, and 2) to present preliminary results from empirical, parametric crown shape and volume modeling of Scots pine and Norway spruce applicable in Finland. Results indicated that the basic dimensions (maximum radius, its height and crown length) of tree crowns were better predicted for pines, but the profile shape of the upper part of the crowns varied more than in spruce. Pine crowns were also slightly less concave than spruce crowns. No regularities were observed concerning the lower part of the crowns. The asymmetry of crowns increased as a function of tree age for both species, spruce crowns being more asymmetric than pine crowns. A comparison of measured crown volume with several simple geometrical crown shape envelopes showed that using a cone as a crown shape model for Scots pine and Norway spruce underestimates crown volume most severely. Other crown envelope shape models (e.g. ellipsoids) rendered crown volumes closer to the measured volume and did not differ considerably from each other.

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

[2]  J. Monteith,et al.  The Radiation Regime and Architecture of Plant Stands. , 1983 .

[3]  Canopy structure and light climate in a young Scots pine stand. , 1983 .

[4]  A. Strahler,et al.  Geometric-Optical Modeling of a Conifer Forest Canopy , 1985, IEEE Transactions on Geoscience and Remote Sensing.

[5]  P. Oker-Blom,et al.  Photosynthetic radiation regime and canopy structure in modeled forest stands. , 1986 .

[6]  Tree architecture in young Scots pine: properties, spatial distribution and relationships of components of tree architecture. , 1988 .

[7]  Lee C. Wensel,et al.  Estimation of crown form for six conifer species of northern California , 1990 .

[8]  Tiit Nilson,et al.  A forest canopy reflectance model and a test case , 1991 .

[9]  Performance of a canopy light interception model for conifer shoots, trees and stands. , 1991, Tree physiology.

[10]  J. Norman,et al.  Photon Transport in Discontinuous Canopies: A Weighted Random Approach , 1991 .

[11]  Ranga B. Myneni,et al.  Photon-Vegetation Interactions , 1991, Springer Berlin Heidelberg.

[12]  Alan H. Strahler,et al.  Geometric-optical bidirectional reflectance modeling of the discrete crown vegetation canopy: effect of crown shape and mutual shadowing , 1992, IEEE Trans. Geosci. Remote. Sens..

[13]  J. Ottorini,et al.  Development of primary branches and crown profile of Fraxinus excelsior , 1994 .

[14]  C. Woodcock,et al.  A hybrid geometric optical-radiative transfer approach for modeling albedo and directional reflectance of discontinuous canopies , 1995 .

[15]  Alan H. Strahler,et al.  A hybrid geometric optical-radiative transfer approach for modeling albedo and directional reflectance of discontinuous canopies , 1995, IEEE Transactions on Geoscience and Remote Sensing.

[16]  A. Brunner.  A light model for spatially explicit forest stand models , 1996 .

[17]  V C Baldwin,et al.  Predicting the crown shape of loblolly pine trees , 1997 .

[18]  Morten LarsenRoyal.  CROWN MODELLING TO FIND TREE TOP POSITIONS IN AERIAL PHOTOGRAPHS , 1997 .

[19]  H. Sinoquet,et al.  Assessment of the three-dimensional architecture of walnut trees using digitising , 1997 .

[20]  A. Cescatti.  Modelling the radiative transfer in discontinuous canopies of asymmetric crowns. I. Model structure and algorithms , 1997 .

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

[22]  D. Maguire,et al.  Crown profile models based on branch attributes in coastal Douglas-fir , 1997 .

[23]  Wenhan Qin,et al.  On the estimation of leaf size and crown geometry for tree canopies from hotspot observations , 1997 .

[24]  R. Nelson.  Modeling forest canopy heights: The effects of canopy shape , 1997 .

[25]  Richard A. Fournier,et al.  Hierarchical characterization of canopy architecture for boreal forest , 1997 .

[26]  Sylvain G. Leblanc,et al.  A four-scale bidirectional reflectance model based on canopy architecture , 1997, IEEE Trans. Geosci. Remote. Sens..

[27]  Tiit Nilson,et al.  Inversion of gap frequency data in forest stands , 1999 .

[28]  D. Hann.  An adjustable predictor of crown profile for stand-grown Douglas-Fir trees , 1999 .

[29]  Aldo Laurentini.  Computing the visual hull of solids of revolution , 1999, Pattern Recognit..

[30]  D. Sheil,et al.  Assessing forest canopies and understorey illumination: canopy closure, canopy cover and other measures , 1999 .

[31]  K. Gadow,et al.  The Crown Window — a simple device for measuring tree crowns , 2000, Forstwissenschaftliches Centralblatt vereinigt mit Tharandter forstliches Jahrbuch.

[32]  Cristiano Fragassa,et al.  Ground monitoring the light–shadow windows of a tree canopy to yield canopy light interception and morphological traits , 2000 .

[33]  Richard Pollock.  Development of a highly automated system for the remote evaluation of individual tree parameters , 2000 .

[34]  Guoqing Sun,et al.  Modeling lidar returns from forest canopies , 2000, IEEE Trans. Geosci. Remote. Sens..

[35]  Christophe Godin,et al.  Representing and encoding plant architecture: A review , 2000 .

[36]  David Doley,et al.  Estimating tree crown dimensions using digital analysis of vertical photographs. , 2000 .

[37]  A. Kuusk,et al.  A Directional Multispectral Forest Reflectance Model , 2000 .

[38]  P. Gong,et al.  Model-based conifer-crown surface reconstruction from high-resolution aerial images , 2001 .

[39]  S. Sommer,et al.  A fast canopy reflectance model to simulate realistic remote sensing scenarios , 2002 .

[40]  D. Hann,et al.  Crown profile equations for stand-grown western hemlock trees in northwestern Oregon , 2003 .

[41]  Conghe Song,et al.  Estimating Tree Crown Size from Multiresolution Remotely Sensed Imagery , 2003 .

[42]  B. Straub.  AUTOMATIC EXTRACTION OF TREES FROM AERIAL IMAGES AND SURFACE MODELS , 2003 .

[43]  P. Patterson,et al.  Comparison of Ground Sampling Methods for Estimating Canopy Cover , 2003, Forest Science.

[44]  F. Gerard.  Single angle, dual angle and multi-temporal viewing: Assessing through modelling the implications for forest structure variable extraction , 2003 .

[45]  T. White,et al.  Species differences in crown structure and growth performance of juvenile loblolly and slash pine , 2003 .

[46]  M. Kelty,et al.  Crown structure and biomass allocation strategies of three juvenile tropical tree species , 2004, Plant Ecology.

[47]  A. Groot.  A model to estimate light interception by tree crowns, applied to black spruce , 2004 .

[48]  Frédéric Boudon,et al.  Représentation géométrique multi-échelles de l'architecture des plantes. (Multiscale geometric representation of plant architecture) , 2004 .

[49]  R. Latifovic,et al.  Large area forest classification and biophysical parameter estimation using the 5-Scale canopy reflectance model in Multiple-Forward-Mode , 2004 .

[50]  Andres Kuusk,et al.  The effect of crown shape on the reflectance of coniferous stands , 2004 .

[51]  I. Korpela.  Individual tree measurements by means of digital aerial photogrammetry , 2004, Silva Fennica Monographs.

[52]  Kiriakos N. Kutulakos,et al.  A Theory of Shape by Space Carving , 2000, International Journal of Computer Vision.

[53]  V. Trichon.  Crown typology and the identification of rain forest trees on large-scale aerial photographs , 2001, Plant Ecology.

[54]  T. Tokola,et al.  Functions for estimating stem diameter and tree age using tree height, crown width and existing stand database information , 2005 .

[55]  Tiit Nilson,et al.  Estimating canopy cover in Scots pine stands , 2005 .

[56]  Alexandre Piboule,et al.  Reconstructing crown shape from stem diameter and tree position to supply light models. I. Algorithms and comparison of light simulations , 2005 .

[57]  Miina Rautiainen,et al.  Simplified tree crown model using standard forest mensuration data for Scots pine , 2005 .

[58]  J. Phattaralerphong,et al.  A method for 3D reconstruction of tree crown volume from photographs: assessment with 3D-digitized plants. , 2005, Tree physiology.

[59]  P. Anttila.  Assessment of manual and automated methods for updating stand-level forest inventories based on aerial photography , 2005 .

[60]  Guoqing Sun,et al.  Inversion of a lidar waveform model for forest biophysical parameter estimation , 2006, IEEE Geoscience and Remote Sensing Letters.

[61]  M. Rautiainen,et al.  Estimation of forest canopy cover: A comparison of field measurement techniques , 2006 .

[62]  M. Mõttus,et al.  Estimation of crown volume for a geometric radiation model from detailed measurements of tree structure , 2006 .

[63]  Paul C. Struik,et al.  Functional-Structural Plant Modelling in Crop Production , 2007 .