Main functions
Adopt an open architecture system to accurately study the area distribution of objects in color and its related parameters; use various graphic capture equipment to obtain high-quality blade graphics, and use professional software to analyze and calculate related parameters such as the color distribution of objects; in the research on surface coverage:Digital cameras are used to capture images of grass canopy and use special software to calculate the proportion of green plants, land, lesion plants or other objects.
NDVI (normalized vegetation index) = (NIR-R)/(NIR+R), or the calculation of reflectivity of both bands, is closely related to plant transpiration, sunlight interception, photosynthesis, and net primary productivity of the ground.Related.
· Use of NDVI: Detection of vegetation growth status, vegetation coverage and elimination of partial radiation errors, etc.;
· -1<=NDVI<=1, negative value indicates that the ground cover is clouds, water, snow, etc., which reflects high reflection of visible light; 0 means that there is rock or bare soil, etc., NIR and R are approximately equal; positive value indicates that there is vegetation coverage, and increase with the increase in coverage;
· The limitation of NDVI is reflected in the fact that the contrast of reflectivity between NIR and R is enhanced by nonlinear stretching.For the same image, when RVI and NDVI are calculated separately, it is found that the rate of RVI increase is higher than the rate of NDVI increase, that is, NDVI has a lower sensitivity to high vegetation areas;
· NDVI can reflect the background influence of plant canopy, such as soil, wet ground, learning, dead leaves, coarse salvation, etc., and is related to vegetation coverage.
Measurement parameters
Basic measurement data:Analyze the area of the area, analyze the length, width, area, color classification, etc. of the object.
Individual measurement parameters:Area, length, width, perimeter, trait factors, color classification analysis.
Color class parameters:NDVI, greenness, user-defined color index, object outline information measurement.
Application areas
It is widely used in morphological and pathological research fields such as agronomics and forestry.In surface coverage research, it can be applied to the study of canopy coverage of grasslands, flowers, vegetables, and plant seedlings in the early stages of growth (First Growth), or the study of the early stages of growth of fruits.
Main technical parameters
Image acquisition device parameters
Digital camera: 12 megapixels, built-in lens, obtains jpeg images suitable for NDVI analysis, the red channel contains near-infrared spectral data, while the blue contains visible light data, built-in storage, weight less than 200 g.(Note: Traditional RGB color images cannot be obtained)
Analyze software parameters
Purchase Guide:
Image capture system: a digital camera image acquisition device debugged by the manufacturer
Plant color analysis software: Standard version/Professional version WinCAM analysis software.
Origin: Canada Regent
References
Original data source: Google Scholar
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