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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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Notes tagged with ndvi

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Change the white balance (or other configuration) on a Mobius camera

by warren about 2 months ago | 0 | 150 | 2

This is part of the documentation of the Infragram Point & Shoot b...

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Getting started with infrared photography on Infragram.org

by warren about 2 months ago | 0 | 190 | 1

This tutorial walks through working with images on Infragram.org, which is an ea...

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Using 2 camera try to find NDVI Image. Please verify my image .

by Kalarav 4 months ago | 13 | 214 | 2

Hello to all, I am An Embedded enthusiast  right now I’m working on to find NDVI images and it'...

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Aerial Mapping Using Near-Infrared Imaging: The Bioswale at Carpenter's Orchard

by yoshi1776 7 months ago | 0 | 193 | 1

Aerial Mapping Using Near-Infrared Imaging: The Bioswale at Carpenter's Orchard Introduction: ...

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Dual NDVI Ultra Probe Unit

by cfastie 7 months ago | 6 | 398 | 4

*Above: The Dual NDVI Ultra Probe Unit is powered by a Nano Logger (enhanced by an array of beryl...

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Mobius NDVI

by FrankA 12 months ago | 3 | 576 | 3

[](http...

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Conversion of 4k sport camera for NDVI analysis with UAVs

by azaelb about 1 year ago | 12 | 1,255 | 6

Several months ago I got a key chain 1080p camera and converted it to use with my budget drone...

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Getting started with the Infragram Point and Shoot

by abdul about 1 year ago | 3 | 739 | 3

So you've just opened your Infragram Point & Shoot! You'll notic...

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vineyard spectral photos + dropbox

by elador over 1 year ago | 1 | 620 | 3

[](//i.publ...

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Plant Health NDVI -White Balance

by Claytonb over 1 year ago | 3 | 1,318 | 2

I have been experimenting with numerous different types of material to set a custom white balance...

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Filters and SJ4000

by thechapu over 1 year ago | 9 | 660 | 0

Hello, my name is Cristofer writing from Chile. I'm interested in learning more about stress in ...

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Raspberry + NoIR cam + Blue filter

by carolccarvalho over 1 year ago | 6 | 1,706 | 2

Hi! I'm a student and I'm trying to make an analysis related to plant health. For this, I'm u...

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Plant Health NDVI Consumer camera vs Professional multispectral camera

by Claytonb over 1 year ago | 9 | 3,119 | 9

I wanted to share some of my results in comparing a modified consumer camera with a scientific gr...

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Question: doubts about processing NIR images.

by ahcalori over 1 year ago | 8 | 686 | 1

Hi, I have a modified camera to capture NIR images. In the last events, I have been experienc...

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Graze anatomy

by cfastie over 1 year ago | 8 | 1,449 | 4

[](//i...

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Calibration cogitation

by cfastie over 1 year ago | 11 | 1,208 | 5

Normalized difference vegetation index (NDVI) has been computed from satellite and airborne data ...

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Pole NDVI of deer grazing

by cfastie over 1 year ago | 4 | 1,787 | 6

This month Nature published an article with the following assertions: There is three time...

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Infragram Point & Shoot; Time-lapse Difficulty

by balsip over 1 year ago | 3 | 962 | 1

I would like to set up the code on the camera to shoot on a time-lapse interval (120 seconds). ...

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NDVI to Assess Forage Quality, Question.

by AFairbairn almost 2 years ago | 16 | 1,927 | 3

Hello everyone, I am posting this because some may find it interesting and I need some assistanc...

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NDVI Research with an Analytical Grow Chamber

by JohnsonC almost 2 years ago | 15 | 2,044 | 7

My goal is to develop a series of experiments that accurately prove that the NDVI values of grow...

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NDVI from PiNoir with a blue filter

by carolccarvalho almost 2 years ago | 1 | 2,651 | 2

Hi! I'm using a PiNoir camera with a blue filter to take ngb pictures. As I need to do a colo...

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NDVI from infrared and visible-light

by Rayishido almost 2 years ago | 15 | 2,302 | 1

Hi! I am using a Picam and a PiNOIR to take visible-light and infrared picture at the same tim...

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Plant health NDVI Red vs Blue filter

by Claytonb almost 2 years ago | 9 | 3,350 | 5

While testing Ned Horning's calibration plugin([Ned's plugin](https://publiclab.org/notes/nedhorn...

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MidOpt Dual Bandpass and Event38 filter testing

by Claytonb almost 2 years ago | 2 | 1,906 | 2

I recently had Jason Dougherty with Midwest Optical Systems ([MidOpt](http://midopt.com/filters/...

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Single vs. dual cameras

by cfastie almost 2 years ago | 1 | 3,096 | 3

*Above: Ned Horning taking an aerial photo of the scene for testing filters and calibration targe...

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How i was getting different captured images in presence or absence of sun light ?

by Parth almost 2 years ago | 2 | 1,256 | 1

Hello, I want to make infragram camera using i-ball web cam to measure NDVI INDEX.So,I had pu...

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ASC- Airborne Smart Cultivator R&D project( Robot+Payload)

by Mohamed almost 2 years ago | 0 | 1,526 | 0

[![ASC-Robot-Y.mp4_snapshot_03.09_2015.10.29_02.13.45.jpg](//i.publiclab.org/system/images/phot...

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Photo Monitoring Plugin For NDVI using ImageJ

by mlamadrid about 2 years ago | 4 | 2,487 | 4

New calibration capabilities have been added to the ImageJ/FIJI photo monitoring plugin suite hos...

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Testing MIDOPT filters

by cfastie about 2 years ago | 8 | 2,218 | 3

*Above: A folder full of photos of the same scene taken with different filters and different whit...

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Dual bandpass filters

by cfastie about 2 years ago | 2 | 3,513 | 2

*Above: I don't really understand how interference filters work, and I'm pretty sure the person w...

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