response:9717
response:9717


Author Comment Last activity Moderation
dannysmith "thanks @Claytonb, they seem like the way to go " | Read more » about 7 years ago
Claytonb "@dannysmith -I have been using the Labsphere Permaflect coated targets http://labsphere.com/labsphere-products-solutions/materials-coatings-2/coati..." | Read more » about 7 years ago
dannysmith "@Claytonb - I was just wondering if you could indicate what type of calibration targets you are using? I've been looking at targets produced by lab..." | Read more » about 7 years ago
bortek "Thanks Clayton. I am on it now. :) " | Read more » about 8 years ago
Claytonb "@bortek -the blue in the NDVI image is related to the value of the color LUT I applied to the image during processing. I did that to help me to see..." | Read more » about 8 years ago
bortek "@Claytonb - I am planning to start with a single camera and do some initial testing and learning before I go over to two cameras. Yes the focusing..." | Read more » about 8 years ago
Claytonb "Here is a similar scene with the Event38 at about the same height. This is with f/4, exp 1/1250, ISO 100 " | Read more » about 8 years ago
Claytonb "@bortek -I am assuming that the noise is partly due to the filter thickness and light requirement. I believe the Event38 filter is 0.5mm thick and ..." | Read more » about 8 years ago
bortek "This is really interesting. I have read Ned's article too and it is clearly better contrast when using red filter versus blue. I have just receive..." | Read more » about 8 years ago
CHUMBA "Hello @cfastie, thanks for your opinion it really help us out. We are so new on this issue, as I commented you on other talk we just broke a camera..." | Read more » over 8 years ago
cfastie "Hi CHUMBA, It looks like the Rosco 116 is a very good filter for NDVI. Compared to the 2007, it passes less red, has a steeper cutoff between red ..." | Read more » over 8 years ago
CHUMBA "Hi I have been testing with one particular filter wich is the 116 Medium Blue Gree, because the 2007 was not available for sale at the moment. I am..." | Read more » over 8 years ago
fjcaceres "Chris On last thing on the Agribotix site is that they conclude the best filters are the blue ones Javier " | Read more » almost 9 years ago
cfastie "@fgiorlando, I assume the Hoya 25A filters are just as good as Wratten 25A filters for infrared photography. The Hoya glass filters would produce c..." | Read more » almost 9 years ago
cfastie "There seems to be a lot of marketing hooey at the Agribotix site. They seem to be doing DIY uncalibrated infrared vegetation index work like a lot ..." | Read more » almost 9 years ago
fjcaceres "Because I don't really know much about filters, I came across this company named Agribotix that do NDVI and below the next paragraph is their expla..." | Read more » almost 9 years ago
fgiorlando "Interesting stuff indeed, I have been lurking here for a while and trying to build a good documentary NDVI camera for a public gardening project. I..." | Read more » about 9 years ago
eustatic "this is cool. thanks, chris " | Read more » about 9 years ago
cfastie "He didn't listen when they told Thomas Edison "You've tried enough filaments." He didn't listen when they told George Washington Carver "We don't n..." | Read more » over 9 years ago
warren ";-) can't we just choose a color and stick with it, Chris? " | Read more » over 9 years ago