Research oriented plant canopy image analyzer FK-G20

Introduction to FK-G20 scientific research plant canopy image analyzer

The plant canopy image analyzer is used for the study of plant canopies at various heights. Fisheye lenses and CCD image sensors are used to obtain plant canopy images, and specialized analysis software is used to obtain relevant indicators and parameters of the plant canopy. By using fisheye lens imaging to measure plant canopy data, only one operation is required, simplifying the complex work of traditional measurement methods that require multiple measurements at fixed points per day. Moreover, using image method to measure canopy can actively avoid canopy gaps that do not comply with the calculated canopy structure parameters, as well as obstacles that do not comply with measurement calculations.
measurement parameters
leaf area index
Average inclination angle of blades
Scattering radiation transmittance
Transmittance of Direct Radiation at Different Solar Altitudes
Extinction coefficient at different solar altitude angles
Directional distribution of leaf area density
Purpose and Scope of Application
It can measure the direct sunlight transmittance, scattered light transmittance, extinction coefficient, leaf area index, and average leaf inclination angle of the plant canopy, and can be used for measuring and analyzing the light receiving status of the canopy in crops, fruit trees, and forests. It can also be used for comparing the structure of different plant populations; It can dynamically monitor the growth process of crop populations in farmland, which is suitable for the research and teaching of ecological field plant population dynamic monitoring;
It is also applicable to research and teaching related to cultivation, breeding, plant population comparison and development in the fields of agriculture, horticulture, and forestry.
Principles and Methods
The plant canopy image analyzer adopts the principle of correlation between canopy porosity and canopy structure. It is based on the Beer's law of attenuation of light passing through a medium, and defines a series of assumptions for the plant canopy. Using a semi theoretical and semi empirical formula, the canopy structure parameters are calculated by measuring the canopy porosity. This is the principle unanimously adopted by various canopy instruments around the world. Under the above principle, the plant canopy image analyzer adopts the method of analyzing and measuring the canopy porosity of the hemisphere image under the canopy, which is the most accurate, labor-saving, time-saving, and convenient method among various methods.
structural characteristics
A small fisheye camera lens specially designed for measuring plant canopy structure is installed on a universal balance joint, which can automatically maintain the lens in a horizontal state. The lens is installed at one end of the measuring rod, which can be easily extended horizontally or vertically into the dense canopy. The communication line at one end of the measuring rod can be connected to a computer, making it easy to take pictures. Due to its small size and the presence of the measuring rod, it can be extended into different heights of the canopy to quickly perform layered measurements and measure the vertical distribution of light transmittance and leaf area index within the population. The measuring rod is equipped with a linear PAR probe, and can also measure the photon flux density inside and outside the canopy (μ mol/㎡)? S) Value, which can be used as a reference value for energy analysis within the canopy
Features
Non destructive measurement of canopy structure
Can measure photosynthetically active radiation (PAR) inside and outside the canopy
Handheld universal joint automatic horizontal adjustment probe, no need for tripod
A portable laptop can help you select sampling points correctly and make real-time decisions on image selection
Powered by an external lithium battery pack, it is convenient for observation and long-term measurement, especially suitable for completing heavy field observation tasks
Image analysis software can define image analysis areas arbitrarily (zenith angle can be divided into 10 zones, azimuth angle can be divided into 10 zones). When conducting regional analysis on canopies in different directions, it is possible to arbitrarily shield ground scenery and unreasonable canopy parts (such as missing plants, edge row problems, etc.). The selection of starting and ending angles for different zenith angles can avoid canopy pore conditions that do not comply with the calculation of canopy structure parameters. By manually adjusting the threshold, parameters such as leaf area index can be measured more accurately
Lens angle: 150 ° (or user selectable 180 ° lens). Unless the user has special needs, a 180 ° fisheye lens is often not suitable
The assumptions made in the principles and methods of pore measurement are not suitable and economical for analyzing canopy structure
Resolution: 768 × 494pix
Measurement range: zenith angle from 0 ° to 75 °
PAR sensing range: sensing spectrum 400nm~700nm measurement range 0-2000 μ mol/㎡? S
Analysis software: Plant canopy analysis system
Display and Memory: Depends on the choice of laptop.
Power supply: lithium battery pack
Transmission interface: USB
Working temperature: 0-55 ℃