Public Lab Wiki documentation



Infragram



The Infragram project brings together a range of different efforts to make Do-It-Yourself plant health comparisons possible with infrared photography.

This project was made possible with support from Google and the AREN Project at NASA.

Uses

Vineyards, large farms, and NASA all use near-infrared photography for assessment, usually by mounting expensive sensors on airplanes and satellites. Infrared analysis is used for a variety of things, but most focus on assessing plant health, such as:

Screenshot_2017-10-18_at_11.59.57_AM.png

Just as cell phone video has become instrumental in accountability today, we aim to democratize and improve reporting about environmental impacts.


Getting started

To start to do your own infrared analysis project, you'll need:

  1. Photos: A way to take near-infrared photos AND matching regular visible light photos from the same angle (in a single camera or two matched cameras)
  2. A question you'd like to answer -- look through these templates for how to design your analysis
  3. Software for processing and analysing your photos
  4. Analysis -- tips and support to interpret and understand what your images are telling you

How it works

Background

In 2014, we launched an early version of this project on Kickstarter, and the video is a good overview of the project, although we've come a long way since:

The Infragram Kickstarter video, a great introduction to the project.


Infragram starter kits

The Public Lab Store offers a range of Do-It-Yourself kits to convert cameras for infrared photography, as well as ready-made cameras like the Infragram Point & Shoot camera:

Get a kit to start

Also see Getting images, below.


Comparing plant health

An important limitation of most DIY techniques is that we are using uncalibrated cameras, and so the analysis works best when we compare two vegetated areas under the same conditions (light, angle, time of day) rather than just take a photo of a single region. That is, the DIY approach is based on relative, or comparative, uses -- you can't learn a lot without a point of comparison.

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An easy way to do a comparison is:

  1. compare two areas (with the same type of plants) within a single photograph
  2. compare two photographs with the same camera settings and lighting conditions (angle, brightness, color), of the same plants

[illustration]

Learn more at Comparing Plant Health


Software

Doing NDVI analysis on plants requires post-processing both infrared and visible images (or a combined image -- see Getting images) into a composite image, using the NDVI equation (or another like it). This can be done with a variety of software; see this page for more:

Infrared software


Questions

Post questions or troubleshooting requests here, for example about:

  • making sure your camera is working (color balance, exposure, light source)
  • what to compare against (see study design)
  • different lighting conditions or angles

Title Author Updated Likes
Problem with filter for Raspberry Pi NoIR Camera @sjmanosalvas 6 days ago
Why do the plant colors look the way they do? @jenhu 20 days ago
Which RGB channel is the near-infrared saved in for the red and blue filter? @jenhu 20 days ago
Camera module for Computer Vision/LED Plant Measurement System @SangHo about 1 month ago
600 year old cedar tree - Infragram @Randall about 1 month ago
How can I can make a raspberry pi camera just with the filters process the crops and immediately produce the results to a computer or to other device, without having to use the website? @csteran about 1 month ago
How to make this picture in an NDVI image @Davide_Ferrante about 1 month ago
Add a filter on a Pi NoIR camera @fsxskillz about 2 months ago
How can I validate the NDVI images @Aman007 about 2 months ago
buying Infragram filter pack in UK @ruya 2 months ago
How to get NDVI image by image src instead of choosing image ? @Ankita 2 months ago
Can these filter packages be adapted to Raspberry Pi cameras? @sjmanosalvas 3 months ago
Visible Atmospherically Resistant Index (VARI) @rway 3 months ago
Camera that would detect at 1064nm? @jpschaaf 3 months ago
Can Infragrams be used to count coconuts/crop productivity? @James_Vagabond 3 months ago
How can I have a value of NDVI starting from a IR picture? I want to find a numeric value of NDVI in pictures teken with a normal camera without IR filter. is it possible? @giuliooooo 3 months ago
Can I use a Raspberry Pi with the Pi Noir camera to make NDVI images? @warren 6 months ago
How big is the filter in the infragram DIY filter pack? @robotfarms 6 months ago
I need a help I'm doing a research project on NVDI processes @camiloreyes 9 months ago
AstroPlant RPi sensory system @Sidney_AstroPlant 10 months ago
"Test images" for multispectral image processing @warren 10 months ago
Transmission & other related information of the Red Filter @suman 12 months ago
Can I use any red filter for capturing NIR light? @sujayj about 1 year ago
I would like to know why near infared imaging works, and what it does. @kiramac about 1 year ago
GoPro Hero HD first version- Making full spectrum( Removing IR filter) @suman over 1 year ago
Can you process multiple images at the same time? @JonathanM32 over 1 year ago
PublicLab Mobius calibration @dbehr over 1 year ago
Video Infragram @jfd over 1 year ago
Query about Infragram DIY Filter Pack ( blue & red filter) @suman over 1 year ago
Question infragram kit @marfisistemidroni over 1 year ago
What is the ideal white balance for the Infragam Point and Shoot? @abdul over 1 year ago
Can anyone help me troubleshoot my NDVI imagery? @abdul over 1 year ago
How to process images using a mobius with an IR lens? @miguel_rosas over 1 year ago
MobiusActionCam vs S100 @ashwinvasudevan over 1 year ago
what are the requirements of a camera for Filter replacement and NDVI imaging? @Ajith_Kumar over 1 year ago
loading the proper camera driver for the DSK webcam @Winter over 1 year ago
Correct Config. File & Trobule shooting2 @will123 over 1 year ago
Don't know how to use DIY Plant Analysis Webcam @Barabba33 over 1 year ago
Infragram Point and Shoot Plant Cam @alexrfholland over 1 year ago
Question: Infragram point & shoot image @ino almost 2 years ago
How can one Infragram photo produce different NDVI results? @cfastie over 2 years ago
Question: how to calculate NDVI @rajsan1108 over 2 years ago
What is the correct interpretation for the NDVI infragram color scale? @DuvTorres almost 3 years ago
Modified camera with 25A red filter - NDVI needs calibration- Any Ideas? @Tbtouaki over 3 years ago
First Infragram cam trials - Primeros ensayos con cámaras Infragram @ivalethia over 3 years ago
Question: retrieving true color image from infragram images @brooksdr over 3 years ago
Will Infragram help with Indoor Hydroponics/Aquaponics? @ajawitz over 4 years ago
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Activities

Purpose Category Status Author Time Difficulty Replications
Video tutorial: Creating false-color NDVI with aerial wetlands imagery - - @warren - - 0 replications: Try it »
Conversion of 4k sport camera for NDVI analysis with UAVs - - @azaelb - - 0 replications: Try it »
Raspberry + NoIR cam + Sensors to detect water stress of the plants during their growing - - @LaPa - - 0 replications: Try it »
Mobius NDVI - - @cfastie - - 0 replications: Try it »
Mobius non-fish eye and small lifter wrapup - - @patcoyle - - 0 replications: Try it »
Getting started with the Infragram Point and Shoot - - @abdul 1hr medium 0 replications: Try it »
Mobius IR conversion - - @cfastie - - 0 replications: Try it »
Install a filter or change the lens in a Mobius Action Cam - - @warren - - 0 replications: Try it »
Creating Multispectral Imagery for California Beaches - - @MicheleTobias - - 0 replications: Try it »
Video tutorial: Creating infrared composites of aerial wetlands imagery - - @warren - - 0 replications: Try it »
Getting started with infrared photography on Infragram.org - - @warren - - 1 replications: Try it »
Eclectis: a week of civic science in Amsterdam North - - @warren - - 0 replications: Try it »
Pasture measurement using NIR camera - - @drkatnz - - 0 replications: Try it »
Mobius non-fish-eye lens conversion - - @patcoyle - - 0 replications: Try it »
Update firmware on the Mobius Action Cam - - @warren - - 0 replications: Try it »
Show 5 more

Add an activity  or request an activity

Activities should include a materials list, costs and a step-by-step guide to construction with photos. Learn what makes a good activity here.


Challenges

We're working to refine and improve DIY infrared photography on a number of fronts; here, take a look at the leading challenges we're hoping to solve, and post your own. For now, we're using the Q&A feature, so just click "Ask a question" to post your own challenge.

Be sure to add:

  • constraints: expense, complexity
  • goals: performance, use cases

Title Author Updated Likes
How can we stream video to SpectralWorkbench.org or Infragram.org from a Raspberry Pi camera? @warren 5 months ago
Can we create a guide or set of guides to interpreting infrared or NDVI images? @warren 5 months ago
Can I use a Raspberry Pi with the Pi Noir camera to make NDVI images? @warren 6 months ago
Can we use a color calibration reference card to calculate absolute values for DIY NDVI? @warren 6 months ago

Ask a question  or help answer future questions


Getting images

To start, you'll need near-infrared images and regular visible light images of the same scene -- or an image which combines these in different color channels.

There are sources of #remote-sensing imagery from satellites and planes you can use, but the Infragram project is about making and using low-cost converted cameras to take our own images.

There are both single camera and dual camera ways of doing this, and each has pros and cons.

Get a kit here or learn about converting a camera here:

Infrared Camera Conversion


White balance

We've learned that careful white balancing of your converted Infragram camera is essential for good NDVI images. Learn how in this short video and read in depth on the topic in research by Chris Fastie. There is also a wiki page on the subject at http://publiclab.org/wiki/infrablue-white-balance

If you're using an Infragram Point & Shoot (aka Mobius Action Cam), see this page for a guide on setting the white balance of that camera.


Filters

Should you use a RED or BLUE filter?

See Infragram filters for more on different filters and how well they work.

Early research by Public Lab contributors led to a blue filter technique for making Infragram cameras. But recent research on PublicLab.org has shown that red filters work better -- and on a wider range of cameras. Blue filters did not work on most CMOS cameras, especially cheaper webcams. Public Lab kits now ship with the red Rosco #19 "Fire" filter.


Give or get help

Here are some resources to get help converting or using your Infragram camera. Keep in mind that we are a peer driven community and we encourage everyone to give as well as receive assistance and support!

Title Author Updated Likes
Problem with filter for Raspberry Pi NoIR Camera @sjmanosalvas 6 days ago
Why do the plant colors look the way they do? @jenhu 20 days ago
Which RGB channel is the near-infrared saved in for the red and blue filter? @jenhu 20 days ago
Camera module for Computer Vision/LED Plant Measurement System @SangHo about 1 month ago
600 year old cedar tree - Infragram @Randall about 1 month ago
How can I can make a raspberry pi camera just with the filters process the crops and immediately produce the results to a computer or to other device, without having to use the website? @csteran about 1 month ago
How to make this picture in an NDVI image @Davide_Ferrante about 1 month ago
Add a filter on a Pi NoIR camera @fsxskillz about 2 months ago
How can I validate the NDVI images @Aman007 about 2 months ago
buying Infragram filter pack in UK @ruya 2 months ago
How to get NDVI image by image src instead of choosing image ? @Ankita 2 months ago
Can these filter packages be adapted to Raspberry Pi cameras? @sjmanosalvas 3 months ago
Visible Atmospherically Resistant Index (VARI) @rway 3 months ago
Camera that would detect at 1064nm? @jpschaaf 3 months ago
Can Infragrams be used to count coconuts/crop productivity? @James_Vagabond 3 months ago
How can I have a value of NDVI starting from a IR picture? I want to find a numeric value of NDVI in pictures teken with a normal camera without IR filter. is it possible? @giuliooooo 3 months ago
Can I use a Raspberry Pi with the Pi Noir camera to make NDVI images? @warren 6 months ago
How big is the filter in the infragram DIY filter pack? @robotfarms 6 months ago
I need a help I'm doing a research project on NVDI processes @camiloreyes 9 months ago
AstroPlant RPi sensory system @Sidney_AstroPlant 10 months ago
"Test images" for multispectral image processing @warren 10 months ago
Transmission & other related information of the Red Filter @suman 12 months ago
Can I use any red filter for capturing NIR light? @sujayj about 1 year ago
I would like to know why near infared imaging works, and what it does. @kiramac about 1 year ago
GoPro Hero HD first version- Making full spectrum( Removing IR filter) @suman over 1 year ago
Can you process multiple images at the same time? @JonathanM32 over 1 year ago
PublicLab Mobius calibration @dbehr over 1 year ago
Video Infragram @jfd over 1 year ago
Query about Infragram DIY Filter Pack ( blue & red filter) @suman over 1 year ago
Question infragram kit @marfisistemidroni over 1 year ago
What is the ideal white balance for the Infragam Point and Shoot? @abdul over 1 year ago
Can anyone help me troubleshoot my NDVI imagery? @abdul over 1 year ago
How to process images using a mobius with an IR lens? @miguel_rosas over 1 year ago
MobiusActionCam vs S100 @ashwinvasudevan over 1 year ago
what are the requirements of a camera for Filter replacement and NDVI imaging? @Ajith_Kumar over 1 year ago
loading the proper camera driver for the DSK webcam @Winter over 1 year ago
Correct Config. File & Trobule shooting2 @will123 over 1 year ago
Don't know how to use DIY Plant Analysis Webcam @Barabba33 over 1 year ago
Infragram Point and Shoot Plant Cam @alexrfholland over 1 year ago
Question: Infragram point & shoot image @ino almost 2 years ago
How can one Infragram photo produce different NDVI results? @cfastie over 2 years ago
Question: how to calculate NDVI @rajsan1108 over 2 years ago
What is the correct interpretation for the NDVI infragram color scale? @DuvTorres almost 3 years ago
Modified camera with 25A red filter - NDVI needs calibration- Any Ideas? @Tbtouaki over 3 years ago
First Infragram cam trials - Primeros ensayos con cámaras Infragram @ivalethia over 3 years ago
Question: retrieving true color image from infragram images @brooksdr over 3 years ago
Will Infragram help with Indoor Hydroponics/Aquaponics? @ajawitz over 4 years ago
Show 37 more

Ask a question  or help answer future questions

When describing your question or answer, please include details of the equipment and process you are using as described here for Infragram photos .

Also see our older FAQ here: https://publiclab.org/wiki/infragram-faq


dorn

kites

DIY Filter Pack: This is just a piece of "superblue" filter which you can use to turn your webcam or cheap point-and-shoot into an infrared camera. The filter allows you to take an infrared photo in the "red" channel of your camera, and a visible image in the "blue" channel. The Public Lab kit comes with a white balance card and instructions on how install your filter -- it's pretty easy!
Infragram Point & Shoot: This is a straightforward, if basic, point-and-shoot camera which we're getting a factory to pre-convert with infrablue filters: you can simply take photos as you normally would, then upload them to our free and open-source web app to quickly and easily get a variety of composite images and analyses (the site is currently in beta with minimal initial features).

"We're excited that Public Laboratory is developing a low-cost infrared camera which will help us track the success of wetland restoration projects in the Gulf Region--as well as help us track pollution. The Gulf Restoration Network has been using the aerial monitoring techniques that Public Lab developed, so having the infrared camera available to put on the balloon and kite rig will only expand the applications of that technology as well as add value to airplane monitoring flights that help us watchdog the oil industry in the Gulf." -- Scott Eustis, M.S., Gulf Restoration Network

More information

The Public Lab community has been building up a knowledge base in DIY infrared imaging for years. Read more about the history of this project here

dual

melange


Infragram instructions and graphics

Digital files for the filter pack envelope (including logo) and instructions:

infrablue-filter-envelope-color.pdf

infragram-instructions-0.3.pdf

infragram-instructions-back-0.2.pdf

Sketchup model for the "filter switch" graphic: filter-switch.skp

Datasheets

Datasheet for Infragram Webcam: infragram-webcam-new-old-diagram.pdf

Focal length of the camera:3.27mm. Chip sensor size for the camera: Sensor:ov2643,SIZE:1/4"

Spec_of_JDEPC-OV04_Ver_1.01.pdf

Module_XJDOEM-final_version-July_30-2013.xlsx

HK-7035AS-582-2-M7_Model_(95955).pdf


near-infrared-camera remote-sensing ndvi wetlands software near-infrared soil infragram tool 19 method agricultural fertilizer

list:plots-infrared parent:multispectral-imaging