Cl 110 Plant Canopy Imager
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FEATURES
Single measurement for comprehensive data collection and instantaneous, in-field calculation with integrated software
Lens: Equidistant wide-angle lens
Image Resolution: 768 x 494 pixels
Interface: USB
Measuring Time: 0.5-1 second
Fish-eye Lens Angle: 150°
Operating Temperature: 5 to 50° C
Imaging Probe Size: 20 x 20 mm
Arm Length: 440 mm
Imaging Probe and
Arm Weight: 500 g
PAR: 24 PAR sensors, 10 mm spacing
The CI 110 Digital Plant Canopy Imager includes:
How it Works
Leaf Area Index (LAI) is defined as one sided leaf area divided by the total ground area. Photosynthetically Active Radiation (PAR) designates the spectral range of solar radiation (400-700 nm). By measuring PAR and LAI simultaneously, one is able to calculate LAI and canopy parameters using a variety of methodologies.
To calculate LAI, the CI 110 captures a 150° fisheye image of the canopy, which is divided into zenith and azimuthal divisions. Using the software included on the tablet computer, the user can include or exclude any zenith and azimuth division to focus on specific portions of the canopy for study
The most practical method for non-destructive LAI measurement is the Gap Fraction Method. Gap Fraction indicates how much of the sky is visible from beneath the plant canopy. The greater the area of sky that is visible, the larger the gap fraction.
When using the CI 110, a value between 0 and 1 is assigned to estimate the Gap Fraction in a canopy—0 means that no sky is visible below the plant canopy whereas 1 means that the entire area is sky is visible, or there is no foliage coverage. Any fraction indicates partial foliage cover.
Images taken with the CI 110 are divided into sectors according to the user-selected number of zenith and azimuthal division. The fraction of the sky (solar beam transmission coefficient) that is visible in each sector is automatically analyzed by tallying the sky portion of the image pixels in that sector. Once all sectors are analyzed and the average solar beam transmission coefficients for each zenith division are computed, the hemispherical diffuse radiation transmission coefficient (the sky view factor), mean foliage inclination angles, and plant canopy extinction coefficients are instantaneously computed by CI 110's analysis software.
*Norman J.M. and Campbell, G.S. (1989) Canopy Structure. In: Plant Physiological Ecology, Field methods and instrumentation. (eds. R. W. Pearcy, . Ehleringer, H.A. Moorney and P.W. Rundel), Chapman & Hall, London and New York, pp. 301-325.
Single measurement for comprehensive data collection and instantaneous, in-field calculation with integrated software
- No above-canopy reference measurement required
- Calculated LAI of low lying plant canopies up to forest canopy
- Adjustable camera lens focus for varying canopy heights, down to 30 cm
- 150° viewing angle with live-updating high-resolution fish-eye digital image
- On-site evaluation of solar beam transmission coefficients or gap fractions for LAI analysis
- Calculation of diffuse radiation transmission coefficients (the sky view factor), mean foliage inclination angles, and plant canopy extinction coefficients
- Fully integrated ceptometer with 24 photodiodes to measure Sunflecks in the range of Photosynthetically
- Active Radiation
- User-selected number of zenith
and azimuthal divisions allows investigation of any canopy
sectors desired - Digital masking of unwanted elements in image
- Digital color filters allow user to further distinguish between sky and plant
- Internal compass and GPS enable repeated measurements in the same location over the growing season
Lens: Equidistant wide-angle lens
Image Resolution: 768 x 494 pixels
Interface: USB
Measuring Time: 0.5-1 second
Fish-eye Lens Angle: 150°
Operating Temperature: 5 to 50° C
Imaging Probe Size: 20 x 20 mm
Arm Length: 440 mm
Imaging Probe and
Arm Weight: 500 g
PAR: 24 PAR sensors, 10 mm spacing
The CI 110 Digital Plant Canopy Imager includes:
- Self-leveling digital fish-eye imaging probe
- 24 PAR sensor-arm with USB interface
- Tablet computer preloaded with operational software
- Operations manual
- Hard-shell instrument carrying case
How it Works
Leaf Area Index (LAI) is defined as one sided leaf area divided by the total ground area. Photosynthetically Active Radiation (PAR) designates the spectral range of solar radiation (400-700 nm). By measuring PAR and LAI simultaneously, one is able to calculate LAI and canopy parameters using a variety of methodologies.
To calculate LAI, the CI 110 captures a 150° fisheye image of the canopy, which is divided into zenith and azimuthal divisions. Using the software included on the tablet computer, the user can include or exclude any zenith and azimuth division to focus on specific portions of the canopy for study
The most practical method for non-destructive LAI measurement is the Gap Fraction Method. Gap Fraction indicates how much of the sky is visible from beneath the plant canopy. The greater the area of sky that is visible, the larger the gap fraction.
When using the CI 110, a value between 0 and 1 is assigned to estimate the Gap Fraction in a canopy—0 means that no sky is visible below the plant canopy whereas 1 means that the entire area is sky is visible, or there is no foliage coverage. Any fraction indicates partial foliage cover.
Images taken with the CI 110 are divided into sectors according to the user-selected number of zenith and azimuthal division. The fraction of the sky (solar beam transmission coefficient) that is visible in each sector is automatically analyzed by tallying the sky portion of the image pixels in that sector. Once all sectors are analyzed and the average solar beam transmission coefficients for each zenith division are computed, the hemispherical diffuse radiation transmission coefficient (the sky view factor), mean foliage inclination angles, and plant canopy extinction coefficients are instantaneously computed by CI 110's analysis software.
*Norman J.M. and Campbell, G.S. (1989) Canopy Structure. In: Plant Physiological Ecology, Field methods and instrumentation. (eds. R. W. Pearcy, . Ehleringer, H.A. Moorney and P.W. Rundel), Chapman & Hall, London and New York, pp. 301-325.
