I want to have a discussion here related to various methods of collecting NIR imagery in support of generating Vegetation Index data such as NDVI, specifically with regards to using OTS digital cameras or modified digital cameras.
In general there are two approaches:
- Single Camera in which one of the 3 bands captures NIR instead of visible light
- Dual Camera One camera captures R,G,B and another captures only NIR
NDVI requires a visible band (usually Red or in the case of single camera NDVI, Blue) and an NIR band.
I've been working on a single camera NDVI mapping solution using canon P&S. Testing, testing, testing, and posting results at www.flightriot.com
Please offer any guidance, suggestions, experience, or questions related to using NIR imagery in UAV aerial mapping.
I look forward to the discussion.
Replies
Soo.. Any opinion about the raspberry pi camera module noir, a good choice for ndvi photo?
IT seems they've made some progress with it:
http://publiclab.org/notes/warren/10-29-2013/raspberry-pi-infrared-...
Hey! Thank you for your website, I love your videos!!!
This page, this page, and this page may be useful as references for this discussion.
Thank you John,
It seems a lot stuff to study..One more concern, to monitor vegetation's condition and stress, (get accurate NDVI pics) do we actually need a professional camera? Or the modified camera can do this job perfectly?
Many thanks,
Kun
Unfortunately, it is a lot of stuff to study. Searching is even more time-consuming on diydrones.com (DIYD). This page may help you with searching, including the tip at the bottom of the page.
Because of limited budgets, and an interest in do-it-yourself (DIY), many members/visitors to DIYD keep looking for less expensive but good enough products, or products that can be hacked or modified. A recent example is this page. And an interesting variety of opinions on this page.
I don't have expertise in NIR or NDVI topics, including specific camera products or hacks of products. However, while cataloging the DIYD blog posts (starting January 2013), I did notice a few that may be useful to you, even though they may not answer your immediate questions.
I have often found that the most useful info for me was in the comments, rather than in the initial post/discussion topic.
http://diydrones.com/profiles/blogs/infragram-a-kickstarter-project...
http://diydrones.com/profiles/blogs/ir-and-eoi-brushless-gimbal
http://diydrones.com/profiles/blogs/raspberry-pi-noir-and-public-la...
http://www.diydrones.com/profiles/blogs/results-of-two-years-of-work
http://diydrones.com/profiles/blogs/weed-mapping-in-maize-fields-us...
http://diydrones.com/profiles/blogs/100-off-agisoft-photoscan-pro-u...
http://www.diydrones.com/profiles/blogs/geo-referenced-tetra-cam-ad...
http://diydrones.com/profiles/blogs/visible-rgb-and-full-spectrum-r...
http://diydrones.com/profiles/blogs/remote-sensing-with-uav-for-bio...
Best wishes on your project!
Hi John,
Many thanks for your websites and I much appreciate your help so much! I am gidding it in much more and found this website. I hope it could help.
Kun
Hi Kun,
You are most welcome. More stuff in this blog post and this blog post. Read the comments on this blog post from 2012. This product is an alternative to the one you found. Here is one more link to look at. You may find more info by searching DIYD for 2011-2012 blog posts and discussions. Hope you are resting your eyes between all that reading. :-)
Hi John,
I am glad to receive your reply and thank you so much~ It really helps mine study!! I will post my least study and share it with you~
P.S. Your are right, recent weeks, I feel my eyes are not good! Lol...
Cheers,
Kun
This 2014 discussion may be one of the most useful on DIYD for your interests.
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