This video covers how I set up my Skywalker FPV plane with a Canon Point and Shoot camera using CHDK scripts triggered by RC transmitter for aerial mapping.
Thanx for sharing. best .cj
Great video. I am about to do the same with a Canon SX 230 HS modified for NDVI. I assume the CHDK would work the same way? Would you be willing to share your scripts?
Thanks Brenden. I was at 3D Robotics Berkeley today, and they recommended exactly what you are doing as probably the best way to map for now. I am going to test my camera over the weekend using a Hex Copter, and on my plane next week when it comes in. I'll share the pics and details. Here is the link to MaxMax.com where I bought the camera and got it modified http://maxmax.com/IRCameraConversions.htm
Phil, that sounds great!
I have a handful of Canon cameras I'm testing right now and although the Rosco 2007 is generating similar results to the maxmax Superblue, which I assume is what you purchased, there is still a ton of testing to be done.
I'd love to hear about which camera you are using, how you set your white balance, which image capture settings you use, how you intend to normalize between data sets, correlate NDVI data to ground truth, etc.
I captured some data today using a couple different image capture settings and ran a few NDVI filters on the pics. I'll post the results as soon as I get a chance. I used a Canon SX230 for the flights.
Also, what are you using for post processing?
Ned Horning's Fiji/ImageJ photo monitoring plugin is what I'm currently using. It's free and was made to generate NDVI from individual photos or photo pairs. It's great.
Here is a page I put together to make it easier to grab what you need for the post processing. It really works well and it's a piece of cake to run. http://flightriot.com/post-processing/fiji-imagej/
The fellas over at public lab are great to work with! I'm learning a lot.
Here is a quick sample... I need to post a bunch of comparison photos with different cameras and camera settings, and post processing settings as well. Here are some pics from ground test that show different settings with resulting images: http://flightriot.com/ndvi-tests-canon-sx230-and-a490-with-rosco-20...
I am using a Maxmax modified Canon SX230 HS. No processing planned as of yet. I plan to try Microsoft Ice for stitching. Can you adjust the settings on the Cannon to get this kind of image?
What I need most immediately is the ability to detect general crop stress. There are so many universities using the Maxmax setup that I believe there will be a variety of papers detailing how to detect much more in the near future.
What do you think of this camera for regular (non IR) mapping photos? Great price.
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