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HEMIv10
Nuevo
- Analiza imágenes hemisféricas
- Calcula los parámetros de la estructura del dosel y los índices de radiación solar.
- Predice los niveles de radiación debajo del dosel
El sistema de análisis de imágenes de copas de los árboles HemiView proporciona el hardware y el software necesarios para adquirir y analizar imágenes hemisféricas de copas de árboles y copas de árboles.
Disponible el:
Tipo de Instrumento | Sistema Análisis Imágenes |
El instrumento mide: | Imágenes Hemisféricas |
- Image file types | BMP, JPG, TIF, Photo CD. |
- Lens distortion | Can be specified as a polynomial relating zenith angle and radial distance. |
- Direct light model | Simple atmospheric transmission, with user defined settings. |
- Diffuse light model | Uniform or Standard overcast sky. |
- Data output | Excel compatible spreadsheet built-in. |
Salidas
Sky Geometry | Centroid, solid angle and pixel count for each sky sector. |
Gap Fraction | Proportion of visible sky by sector. |
Leaf Area Index | By sky sector or overall value. |
Solar Radiation | Direct and diffuse, above and below the canopy, in energy or molar units. |
Site Factors | Direct, indirect (diffuse), global. |
Time series and Sunflecks | Visibility of the solar disc (penumbral effects) and solar irradiance on chosen days, sampled at user-defined intervals or summarised as a sunfleck sequence. |
Optional cosine correction | For any orientation of intercepting surface. |
Overall values | Most outputs can be tabulated by sky sector, or aggregated into a single overall whole sky or annual value. |
Características
The user can define multiple custom output configurations which can be applied to different images.
Interactive graphical alignment tool | Precise registration of images with the hemispherical co-ordinate system. Compensates for magnetic declination. |
Responsive image classification | Threshold intensity discriminates visible and obstructed pixels. The classified image view is updated in real-time. |
Multiple and split views on any image | Classified and colour / grey scale views, or separate sections of a large image can be viewed side by side. |
Negative images | Photographic negatives can be viewed and analysed as positives. |
User-defined number of diffuse sky regions | Enables use of custom ranges of zenith and azimuth angle. |
Leaf Area of a Single Tree | Excel spreadsheet provided with instructions for calculating single tree LAI using HemiView outputs. |
Analysis of partial images | Unwanted parts of images can be ignored by the analysis. |
Configurable for site, lens, solar model | User-defined site, lens and solar model characteristics can be applied to any image by selecting from a list. |
Pre-defined lens characteristics | Lens equations are provided for current and previous lens types supplied by Delta-T Devices |
Results output to Excel compatible workbook | Additional calculations can be performed using standard spreadsheet formulae. Alternatively, workbooks can be saved for further analysis using Excel. Results can be appended to existing workbooks. |
User-defined output configurations | El usuario puede definir múltiples configuraciones de salida personalizadas que se pueden aplicar a diferentes imágenes. |
Componentes principales y software
- Lente ojo de pez SCL9 para cámara DCM9
- Soporte de cámara autonivelante SLM9 v9
- Monopie telescópico MPD1
- Funda impermeable HEMI-CC1 para HemiView
- HMV-TD2 - Trípode para montaje en cámara y cámaras DCM9
- Software y manual HMV1 HemiView
- Cámara SLR digital DCM9 - HEMIv9
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