NDVI and NRG

NDVI stands for "Normalized Difference Vegetation Index". NRG stands for "Near-infrared / Red / Green". NDVI and NRG are both ways to visualize the amounts of infrared and other wavelengths of light reflected from vegetation. Because both these methods compare ratios of blue and red light absorbed versus green and IR light reflected, they can be used to evaluate the health of vegetation. It's a snapshot of how much photosynthesis is happening. This is helpful in assessing vegetative health or stress. (Read more here: https://www.agronomy.org/publications/jeq/articles/36/3/832)

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NDVI difficulties with infrablue filter

by warren about 6 years ago | 4 | 86 views | 0


Video NDVI

by cfastie about 6 years ago | 2 | 143 views | 0


Bee Movie

by cfastie about 6 years ago | 0 | 186 views | 0


Lots of sample Infragram images for testing

by warren about 6 years ago | 3 | 60 views | 0



Invisible Rays

by cfastie about 6 years ago | 4 | 313 views | 1


Middlebury Meetup

by cfastie about 6 years ago | 0 | 181 views | 2


Middlebury Meetup April 30

by cfastie about 6 years ago | 0 | 121 views | 0


DaffyCam

by cfastie about 6 years ago | 3 | 88 views | 1


Rosco!

by cfastie over 6 years ago | 9 | 585 views | 1


Superblue

by cfastie over 6 years ago | 31 | 2,757 views | 2


CrocusCam

by cfastie over 6 years ago | 3 | 121 views | 1


Sanm LeafKam

by cfastie over 6 years ago | 4 | 124 views | 1



Prototype Raspberry Pi-based dual IR cam

by warren almost 7 years ago | 6 | 231 views | 1



Infrared camera test - film types

by cindy_excites almost 7 years ago | 9 | 124 views | 0


Doing NDVI in one camera

by mathew almost 7 years ago | 1 | 139 views | 0


Lincoln Peak Vineyard

by cfastie about 7 years ago | 3 | 116 views | 0


Lee, NH PLOTS/FarmHack Meetup

by cfastie about 7 years ago | 6 | 288 views | 0


NDVI out of the shadows

by cfastie about 7 years ago | 1 | 293 views | 0



Grassroots NDVI - time series

by cfastie over 7 years ago | 2 | 164 views | 0


Testing new false color gradients for NDVI

by warren about 8 years ago | 0 | 2,610 views | 0