Plant Science

• Products
• Custom Applications
• Reference Material

Plant Science Products

• AP4 Porometer
• Delta-T Scan System
• HemiView System
• Net Radiometer (Delta T)
• Root Washer type RWB
• SunScan canopy analysis system
• UV Sensors (Delta T)
• WinDIAS Image Analysis System

• Data Logging
• Soil Moisture
• Water
• Weather Stations

HemiView System

HemiView is a Windows-based program used for image analysis of hemispherical photographs, particularly of plant canopies, including tall, irregular canopies, such as forests.

What is HemiView?

HemiView is a Windows-based program for the convenient image analysis of hemispherical photographs.

Hemispherical photography is particularly suited to the analysis of plant canopies, especially tall, irregular canopies, such as forests.

Typically photographs are taken in uniform sky conditions, looking upwards from beneath the plant canopy using a 180� fisheye lens. A self-levelling mount ensures the camera is held horizontally.

Hemiview uses image, lens and site data to produce measures of canopy structure e.g. gap fraction and leaf area index (LAI).

Combining this information with a solar radiation model, HemiView can predict radiation levels above and below the canopy, and hence direct, indirect (diffuse) and global site factors. By plotting the solar path over the canopy and allowing for the size of the solar disc, HemiView calculates the occurrence of sunflecks and associated solar irradiance on any chosen day of the year. Results are stored in Excel compatible worksheets.

HemiView Version 2.1

We believe that HemiView is now the most advanced and stable Hemispherical photography system available.

• All outputs generated by HemiView have been thoroughly validated (a comprehensive test report is issued with the software).
• Extensive custom outputs, including sunfleck, time series, and leaf area index.
• Extensive on-line help.
• Negative image handling.
• Responsive classification and alignment tools.

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Delta-T Devices supplies high quality research equipment for agronomy, plant science, soil science, eco-physiology, meteorology and environmental monitoring.

Visit the Delta-T Web Site: www.delta-t.co.uk/