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Digital hemispherical photography for estimating forest canopy ...
- https://iforest.sisef.org/contents/?id=ifor0775-005#:~:text=Sampling%20strategy%20%20%20%20Software%20%20,%20%20%20%208%20more%20rows%20
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Digital hemispherical photography for estimating forest …
- https://www.researchgate.net/publication/233924250_Digital_hemispherical_photography_for_estimating_forest_canopy_properties_Current_controversies_and_opportunities
- Advances in digital photographic technology hold great promise to overcome the major drawbacks of hemispherical photography, particularly regarding field techniques and image processing aspects.
Digital hemispherical photography for estimating forest …
- https://iforest.sisef.org/contents/?id=ifor0775-005
- In spite of the recent improvement in digital photography, significant obstacles to the adoption of digital hemispherical photography still remain; accurate and meaningful estimates of forest canopy properties with digital hemispherical photography are hindered by different critical steps, regarding image acquisition and software processing; thus, adequate field collection and …
Digital Hemispherical Photography (DHP) - Exemplar methodology …
- https://1library.net/article/digital-hemispherical-photography-dhp-exemplar-methodology-validation-satellite.q0pjl49z
- 6.4.1 Digital Hemispherical Photography (DHP) 1. Sampling Design:At each SLATS site or plot, DHP are taken at 13 locations: 1 in the centre of the star transect, 6 half way along each arm (at 25 m from centre), and 6 at the ends of each transect (indicated by the blue dots in Figure 6.4). 2.
Digital hemispherical photography for estimating forest …
- https://www.academia.edu/28675539/Digital_hemispherical_photography_for_estimating_forest_canopy_properties_current_controversies_and_opportunities
- Hemispherical photography has been used since the 1960s in forest ecology. Nevertheless, specific constraints related to film cameras have progressively prevented widespread adoption of this photographic method. Advances in digital photographic. Hemispherical photography has been used since the 1960s in forest ecology.
Comparison of film and digital hemispherical …
- https://www.sciencedirect.com/science/article/pii/S0168192302000424
- Hemispherical 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.
Quantifying the Accuracy of Digital Hemispherical …
- https://www.ncbi.nlm.nih.gov/pubmed/29596376
- Digital hemispherical photography (DHP) has been widely used to estimate leaf area index (LAI) in forestry. Despite the advancement in the processing of hemispherical images with dedicated tools, several steps are still manual and thus easily affected by …
Evaluation of Digital and Film Hemispherical Photography …
- https://www.researchgate.net/publication/237557565_Evaluation_of_Digital_and_Film_Hemispherical_Photography_and_Spherical_Densiometry_for_Measuring_Forest_Light_Environments
- From 1999 to 2002 three scholarly articles were published on the comparison of digital and film based hemispherical photography (Frazer et al. 2001, …
Standardizing the Protocol for Hemispherical …
- https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0111924
- 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. Interpreting hemispherical photographs involves classifying pixels as either sky or vegetation. A wide range of automatic thresholding or …
Seasonal variation of leaf area index (LAI) over paddy rice …
- https://www.sciencedirect.com/science/article/pii/S0168192314001968
- Digital hemispherical photography (DHP) The DHP images were taken using a Nikon D5100 camera and a 4.5 mm F2.8 EX DC circular fisheye converter. An ultraviolet cap was used to protect the lens from dust and rain. The total height of the camera and the lens was about 16.5 cm. Two bubble levels were attached to the camera to keep it horizontal for both …
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