Applications of dual-wavelength hemispherical photography in urban climatology and urban forestry
Urban Forestry & Urban Greening, 2020 Abstract Digital hemispherical photography (DHP) is widely used to measure the radiative environment and estimate sky view factors (SVF) in urban areas and leaf area index (LAI) in forests. However, a limitation is the difficulty to distinguish trees from buildings, or leaves from stems and branches.
Janina Konarska +2 more
openalex +2 more sources
PENILAIAN KESEHATAN MANGROVE DI DESA JAGO JAGO, KABUPATEN TAPANULI TENGAH, SUMATERA UTARA
Jurnal Teknologi Perikanan dan Kelautan, 2023 Tujuan penelitian ini adalah untuk menganalisis persentase tutupan mangrove di Desa Jago Jago Sumatera Utara. Metode hemispherical photography digunakan untuk menentukan tajuk mangrove.
Cahyani Fitrah Tanjung +2 more
doaj +1 more source
CALIBRATION OF A LIGHT HEMISPHERICAL RADIANCE FIELD IMAGING SYSTEM [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022 A light hemispherical radiance field imaging system based on fish-eye camera was developed for the measurement of the surface incident radiance in an urban environment, which is often affected by radiometric heterogeneity problems.
M. Lei +3 more
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A Mixed Data-Based Deep Neural Network to Estimate Leaf Area Index in Wheat Breeding Trials [PDF]
, 2020 Remote and non-destructive estimation of leaf area index (LAI) has been a challenge in the last few decades as the direct and indirect methods available are laborious and time-consuming.
Apolo Apolo, Orly Enrique +3 more
core +1 more source
Hemispherical Photography Vegetasi Pantai di Perairan Pulau Sintok, Taman Nasional Karimunjawa
Journal of Marine Research, 2021 Negara kepulauan merupakan negara yang terdiri atas satu atau lebih gugusan pulau, diantara nya adalah pulau - pulau kecil. Pulau kecil terdiri dari komponen lautan dan daratan, komponen daratan terdiri dari pasir, batuan, vegetasi pantai dan lain sebagainya. Keberadaan vegetasi pantai memiliki manfaat dalam merendam gelombang tsunami, mencegah abrasi,
Kiki Ade Kumala +2 more
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Estimation of forest structure metrics relevant to hydrologic modelling using coordinate transformation of airborne laser scanning data [PDF]
Hydrology and Earth System Sciences, 2012 An accurate characterisation of the complex and heterogeneous forest architecture is necessary to parameterise physically-based hydrologic models that simulate precipitation interception, energy fluxes and water dynamics.
A. Varhola +3 more
doaj +1 more source
Enhanced Gap Fraction Extraction From Hemispherical Photography
IEEE Geoscience and Remote Sensing Letters, 2015 Canopy structure can be estimated using gap fraction (GF) data, which can be directly measured with hemispherical photography. However, GF data accuracy is affected by sunlit canopy, multiple scattering, vignetting, blooming, and chromatic aberration. Here, we present an algorithm to classify hemispherical photography, whose aim is to reduce errors in ...
Díaz, Gastón Mauro +1 more
openaire +2 more sources
Standardizing the protocol for hemispherical photographs: accuracy assessment of binarization algorithms. [PDF]
PLoS ONE, 2014 Hemispherical photography is a well-established method to optically assess ecological parameters related to plant canopies; e.g. ground-level light regimes and the distribution of foliage within the crown space.
Jonas Glatthorn, Philip Beckschäfer
doaj +1 more source
Modelling and Comparing Shading Effects of 3D Tree Structures with Virtual Leaves
Remote Sensing, 2021 Reduced solar radiation brought about by trees on agricultural land can both positively and negatively affect crop growth. For a better understanding of this issue, we aim for an improved simulation of the shade cast by trees in agroforestry systems and ...
Rafael Bohn Reckziegel +4 more
doaj +1 more source
Testing the Application of Terrestrial Laser Scanning to Measure Forest Canopy Gap Fraction
Remote Sensing, 2013 Terrestrial laser scanners (TLS) have the potential to revolutionise measurement of the three-dimensional structure of vegetation canopies for applications in ecology, hydrology and climate change.
F. Mark Danson +2 more
doaj +1 more source