This magazine isn't online, but you can get it on your iPad, Kindle or Android tablet via NextIssue. The article is a pretty basic overview, with examples of using a Rite Wing Zephyr and a hexacopter along with a Canon s100 modified with the IR filter removed. But it's notable that drones are getting this kind of attention in agriculture. 

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Comment by Christo Swart on March 14, 2014 at 7:49am

Kevin -- As a novice, this forum proved to be invaluable to me, for which I am very grateful! I take the liberty of extending your invitation to Grant to myself...

Your comment that the bottleneck lies in the calibration and processing of the  images, is the one area on which I am still unclear.

I take the following senario (If I am off the mark, please correct me):

CHDK software in a Canon S100 as an intervalometer
take pictures every 4 seconds during flight
at 1 inch resolution
flying at 130m
with an overlap of 60%
cover 640 acres
in 18-20 minutes

1. How many images will there be?

2. What will size the individual images be?

If I use Agisoft Photoscan Standard to process the images

3. What will the requirements for a workstation to process these images be?

4. How long will it take?

5. What will the size of the processed image be?

If I then use Agpixel to do the analysis,

3. What will the requirements for a workstation to process these images be?

4. How long will it take?

Thanks again to all for the priceless information on the forum.

Comment by Kevin Price on March 14, 2014 at 8:54am

Cristo -  I cannot answer all your questions right now because some are so camera altitude dependent that it is difficult to answer some questions without referring to some of our tables, and I am in the process of packing my office.  I am retiring from Kansas State University and have accepted the position of Executive Vice President of RoboFlight (www.roboflight.com).  I can tell you when we flew an area approximately 1 x 1 mile at 1 inch resolution, we collected around 400 pictures.  Buy as big of a computer as you can afford with at least 32 gb of memory and better with 64 gb.  We flew an area of about 12,000 acres using a Cessna 172 at 4000 feet and generated about 1100 images and it took a week to mosaic these images on a high end PC Desktop with 32 gb of memory.  If processing of the imagery is not something you want to mess with, contact RoboFlight and we can help you get this done and back in a timely manner. Many want to fly the imagery but lack the image processing skills to deal with the imagery, calibration, etc.  I have been teaching digital image processing at the Ph.D. level for 33 years and so this is something I will be helping with at RoboFlight.

Comment by Christo Swart on March 14, 2014 at 9:38am

Thank you very much for your answer and congratulations with your new position. You've got a new customer at Roboflight!

Comment by Mitko Bogdanov on December 19, 2015 at 1:21pm

All,

I have got Canon SX260 converted by MaxMax + their Remote Sense Explorer software. I would like to calculate NDVI based on their image while using Matlab.
Can you provide any brief directions on the matter?
I am interested in the data format of the BIN files RSE writes

Mitko

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