Simulation of grassland-shrubland transition zone landscape images at 650 nm using a simple BRDF model

Mark Chopping, Albert Rango, Sarah Goslee, Tom Schmugge, Jerry C. Ritchie

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

The objective of this study was to assess the capability of a simple bidirectional reflectance distribution function (BRDF) model to simulate angular 650 nm (red wavelength) images of shrubland landscapes when driven by a small number of spatially-varying structural parameters (mean shrub density and width, together with derived mean canopy height and overall brightness), together with two static parameters (spectral reflectance of leaves and a parametric soil/understory BRDF). It was hypothesized that this simple parameterization will lead to important errors in reconstruction of directional (off-nadir) images, as acquired by a tilting multispectral digital camera at six different viewing directions and three different solar zenith angles in the principal plane. The results show that great care is needed in parameterizing the BRDF in this way and that variations in the brightness of the understory - here represented by grasses, forbs, subshrubs, biotic crusts and bare soil - has an important effect on modeled estimates of bidirectional reflectance in the red wavelengths.

Original languageEnglish
Pages3561-3563
Number of pages3
StatePublished - 1 Jan 2002
Event2002 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2002) - Toronto, Ont., Canada
Duration: 24 Jun 200228 Jun 2002

Other

Other2002 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2002)
CountryCanada
CityToronto, Ont.
Period24/06/0228/06/02

Fingerprint

bidirectional reflectance
shrubland
transition zone
Distribution functions
grassland
understory
simulation
Luminance
wavelength
spectral reflectance
nadir
zenith angle
Soils
bare soil
Wavelength
Digital cameras
parameterization
Parameterization
shrub
canopy

Cite this

Chopping, M., Rango, A., Goslee, S., Schmugge, T., & Ritchie, J. C. (2002). Simulation of grassland-shrubland transition zone landscape images at 650 nm using a simple BRDF model. 3561-3563. Paper presented at 2002 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2002), Toronto, Ont., Canada.
Chopping, Mark ; Rango, Albert ; Goslee, Sarah ; Schmugge, Tom ; Ritchie, Jerry C. / Simulation of grassland-shrubland transition zone landscape images at 650 nm using a simple BRDF model. Paper presented at 2002 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2002), Toronto, Ont., Canada.3 p.
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abstract = "The objective of this study was to assess the capability of a simple bidirectional reflectance distribution function (BRDF) model to simulate angular 650 nm (red wavelength) images of shrubland landscapes when driven by a small number of spatially-varying structural parameters (mean shrub density and width, together with derived mean canopy height and overall brightness), together with two static parameters (spectral reflectance of leaves and a parametric soil/understory BRDF). It was hypothesized that this simple parameterization will lead to important errors in reconstruction of directional (off-nadir) images, as acquired by a tilting multispectral digital camera at six different viewing directions and three different solar zenith angles in the principal plane. The results show that great care is needed in parameterizing the BRDF in this way and that variations in the brightness of the understory - here represented by grasses, forbs, subshrubs, biotic crusts and bare soil - has an important effect on modeled estimates of bidirectional reflectance in the red wavelengths.",
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Chopping, M, Rango, A, Goslee, S, Schmugge, T & Ritchie, JC 2002, 'Simulation of grassland-shrubland transition zone landscape images at 650 nm using a simple BRDF model' Paper presented at 2002 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2002), Toronto, Ont., Canada, 24/06/02 - 28/06/02, pp. 3561-3563.

Simulation of grassland-shrubland transition zone landscape images at 650 nm using a simple BRDF model. / Chopping, Mark; Rango, Albert; Goslee, Sarah; Schmugge, Tom; Ritchie, Jerry C.

2002. 3561-3563 Paper presented at 2002 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2002), Toronto, Ont., Canada.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Simulation of grassland-shrubland transition zone landscape images at 650 nm using a simple BRDF model

AU - Chopping, Mark

AU - Rango, Albert

AU - Goslee, Sarah

AU - Schmugge, Tom

AU - Ritchie, Jerry C.

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N2 - The objective of this study was to assess the capability of a simple bidirectional reflectance distribution function (BRDF) model to simulate angular 650 nm (red wavelength) images of shrubland landscapes when driven by a small number of spatially-varying structural parameters (mean shrub density and width, together with derived mean canopy height and overall brightness), together with two static parameters (spectral reflectance of leaves and a parametric soil/understory BRDF). It was hypothesized that this simple parameterization will lead to important errors in reconstruction of directional (off-nadir) images, as acquired by a tilting multispectral digital camera at six different viewing directions and three different solar zenith angles in the principal plane. The results show that great care is needed in parameterizing the BRDF in this way and that variations in the brightness of the understory - here represented by grasses, forbs, subshrubs, biotic crusts and bare soil - has an important effect on modeled estimates of bidirectional reflectance in the red wavelengths.

AB - The objective of this study was to assess the capability of a simple bidirectional reflectance distribution function (BRDF) model to simulate angular 650 nm (red wavelength) images of shrubland landscapes when driven by a small number of spatially-varying structural parameters (mean shrub density and width, together with derived mean canopy height and overall brightness), together with two static parameters (spectral reflectance of leaves and a parametric soil/understory BRDF). It was hypothesized that this simple parameterization will lead to important errors in reconstruction of directional (off-nadir) images, as acquired by a tilting multispectral digital camera at six different viewing directions and three different solar zenith angles in the principal plane. The results show that great care is needed in parameterizing the BRDF in this way and that variations in the brightness of the understory - here represented by grasses, forbs, subshrubs, biotic crusts and bare soil - has an important effect on modeled estimates of bidirectional reflectance in the red wavelengths.

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Chopping M, Rango A, Goslee S, Schmugge T, Ritchie JC. Simulation of grassland-shrubland transition zone landscape images at 650 nm using a simple BRDF model. 2002. Paper presented at 2002 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2002), Toronto, Ont., Canada.