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Recent progress in the patterning of perovskite films for photodetector applications. [PDF]
Light Sci ApplHu C +5 more
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Dataset with press forming results of unidirectional thermoplastic composite laminates including in-plane deformation data for validation of forming simulations. [PDF]
Data BriefBrands D +4 more
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Agricultural and Forest Meteorology, 2013
Abstract Rapid, reliable and meaningful estimates of forest canopy are essential to the characterization of forest ecosystems. In this paper the accuracy of digital hemispherical (DHP) and cover (DCP) photography for the estimation of canopy properties in deciduous forests was evaluated.
Francesco Chianucci, Andrea Cutini
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Abstract Rapid, reliable and meaningful estimates of forest canopy are essential to the characterization of forest ecosystems. In this paper the accuracy of digital hemispherical (DHP) and cover (DCP) photography for the estimation of canopy properties in deciduous forests was evaluated.
Francesco Chianucci, Andrea Cutini
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Assessment of automatic gap fraction estimation of forests from digital hemispherical photography
Agricultural and Forest Meteorology, 2005Thresholding is a central part of the analysis of hemispherical images in terms of gap fraction and leaf area index (LAI), and the selection of optimal thresholds has remained a challenge over decades. The need for an objective, automatic, operatorindependent thresholding method has long been of interest to scientists using hemispherical photography ...
Inge Jonckheere +3 more
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Applied Geography, 2022
The leaf area index (LAI) serves as a proxy to understand the dynamics of plant productivity, energy balance, and gas exchange. Cost-effective and accurate estimation of LAI is essential for under-assessed carbon-rich tropical forests, e.g., mangroves.
S. Paramanik, M.D. Behera, J. Dash
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The leaf area index (LAI) serves as a proxy to understand the dynamics of plant productivity, energy balance, and gas exchange. Cost-effective and accurate estimation of LAI is essential for under-assessed carbon-rich tropical forests, e.g., mangroves.
S. Paramanik, M.D. Behera, J. Dash
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Comparison of film and digital hemispherical photography across a wide range of canopy densities
Agricultural and Forest Meteorology, 2002Hemispherical photography is a widely used method for assessing the light environment beneath forest canopies. As technology advances, digital photography is expected to increasingly replace conventional film photography for such work. However, in the absence of satisfactory comparisons between the two methods, caution is needed in the use of a digital
Sophie E Hale, Colin Edwards
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Automatic thresholding for digital hemispherical photography
Canadian Journal of Forest Research, 2004This paper proposes an automatic thresholding method for the discrimination of sky and canopy elements in color hemispherical photographs taken with a digital camera (Nikon Coolpix 950). The exposures for photography were principally determined on the basis of zenith luminance. DIFphoto, which is diffuse transmittance calculated from the hemispherical
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Canadian Journal of Forest Research, 2000
This study presents the results of a comparison of digital and film hemispherical photography as means of characterizing forest light environments and canopy openness. We also compared hemispherical photography to spherical densiometry. Our results showed that differences in digital image quality due to the loss of resolution that occurred when images
Sylvia R Englund +2 more
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This study presents the results of a comparison of digital and film hemispherical photography as means of characterizing forest light environments and canopy openness. We also compared hemispherical photography to spherical densiometry. Our results showed that differences in digital image quality due to the loss of resolution that occurred when images
Sylvia R Englund +2 more
openaire +1 more source