5. DIFFERENT METHODS
NDVI (Normalized Difference Vegetation Index)
Quantifies vegetation by measuring the difference
between near-infrared and visible red light.
NDVI=
(𝑁𝐼𝑅 −𝑅𝑒𝑑)
(𝑁𝐼𝑅+𝑅𝑒𝑑)
Always ranges from -1 to +1
High NDVI value detect healthier vegetation and low
NDVI value detect les vegetation
6. DIFFERENT METHODS
VCI (Vegetation Condition Index)
Compares the current NDVI to the range of values
observed in the same period in previous year
Expressed in % and gives an idea where the
observed value is situated between the extreme
values in the previous years
High VCI values indicate good and low VCI values
indicate bad vegetation state condition.
7. DIFFERENT METHODS
LAI (Leaf Are Index)
A measure for total area of leaves per unit ground
area and directly related to the amount of light that
can be intercepted by plants
An important variable used to predict photosynthetic
primary production, eva-transpiration and as a
reference tool for crop growth
8. DIFFERENT METHODS
GYURI (General Yield Unified Reference Index)
Was deduced using a fitted double-Gaussian curve
A significant distortion from the model gave
information of the possible stress of the field
10. METHODOLOGY
Build and collect dataset by which
we perform our experiment
Test various algorithms using the same
data
Compare results of various algorithm
