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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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Use Image Sequencer for NDVI plant analysis with 2 images

by warren 20 days ago | 5 | 173 | 2

This tutorial shows how to use Image Sequencer to take two DIY multispectral ...

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NDVI workshop - Barcelona

by imvec about 1 month ago | 3 | 144 | 1

Introduce the assistants to the main concepts around NDVI and plant health monitoring, camera h...

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Red vs. blue filters for NDVI

by nedhorning over 4 years ago | 32 | 15,435 | 6

While working on [calibration techniques](http://publiclab.org/notes/nedhorning/10-21-2013/calibr...

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Prototype: filter map tiles in real-time in a browser with ImageSequencer (NDVI Landsat)

by warren about 1 month ago | 7 | 362 | 1

I've been working with the new Image Sequencer, a Public Lab project, to try ...

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Hacked Infragram Raspberry Pi camera now on the International Space Station

by warren 3 months ago | 3 | 290 | 2

_(Reposted from the [Rosco company blog](http://www.rosco.com/spectrum/index.php/2018/03/rosco-fi...

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

by warren 8 months ago | 0 | 352 | 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 8 months ago | 0 | 496 | 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 New Contributor 10 months ago | 13 | 378 | 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 New Contributor about 1 year ago | 0 | 266 | 2

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

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Dual NDVI Ultra Probe Unit

by cfastie about 1 year ago | 7 | 604 | 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 New Contributor over 1 year ago | 3 | 651 | 3

[](http...

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Conversion of 4k sport camera for NDVI analysis with UAVs

by azaelb over 1 year ago | 19 | 1,983 | 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 over 1 year ago | 3 | 851 | 3

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

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vineyard spectral photos + dropbox

by elador New Contributor almost 2 years ago | 1 | 643 | 4

[](//i.publ...

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Plant Health NDVI -White Balance

by Claytonb almost 2 years ago | 3 | 1,492 | 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 New Contributor almost 2 years ago | 9 | 688 | 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 almost 2 years ago | 6 | 2,124 | 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 almost 2 years ago | 9 | 3,549 | 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 New Contributor almost 2 years ago | 8 | 707 | 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 about 2 years ago | 8 | 1,538 | 4

[](//i...

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Calibration cogitation

by cfastie about 2 years ago | 11 | 1,273 | 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 about 2 years ago | 3 | 1,893 | 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 New Contributor about 2 years ago | 3 | 991 | 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 New Contributor over 2 years ago | 16 | 1,975 | 3

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

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