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ndvi-ag
ndvi-ag


Author Comment Last activity Moderation
suman "Great.... For the accurate dense reconstruction with my mobius setup with wide angle lens, i have figured out best way. There is no option to work..." | Read more » about 5 years ago
cfastie "Stitching Mobius photos can be hard. The longer lens will help. Correcting the distortion afterwards can help. A high shutter speed and vibration d..." | Read more » about 5 years ago
suman "Dear Chris, Thanks for sharing the publication. My main purpose is to test the potential of calculating NDVI using modified infra..." | Read more » about 5 years ago
cfastie " The red filters typically used do not transmit much green light, so the green channel captures mostly NIR. Some yellow filters pass red and green,..." | Read more » about 5 years ago
suman "Dear Chris, First of all thanks for your prompt reply. I have few more things which i am confused about: 1. If i put a red filter,..." | Read more » about 5 years ago
cfastie "When the NIR cut filter is removed from a camera, all three color channels capture NIR light in addition to the color they originally captured (R, ..." | Read more » about 5 years ago
suman "Can i know the real use of adding the filters....just taking off the infrared filter and getting RGB IR channels and separating those channels late..." | Read more » about 5 years ago
warren "Great question -- I used tags to add the prompt for posting replications; if you're willing, would you mind posting your results using the button a..." | Read more » over 5 years ago
cfastie "You are correct that this is not really an extraction. It's just plant material chopped up finely in a blender with some liquid. I also did this wi..." | Read more » over 5 years ago
iamkat "Hi, I tried to re-create the lycopene extraction with methanol and ethanol (lab grade) but didn't get anywhere. It's my understanding that they are..." | Read more » over 5 years ago
Mohamed "THANKS ALOT for your support mathew " | Read more » almost 7 years ago
cfastie "RQ, The white balance looks good. I think those are the settings used by Public Lab. But experimenting with similar numbers could produce better r..." | Read more » almost 7 years ago
mathew "wow! aerial robotic planting! that's really cool. " | Read more » about 7 years ago
azaelb "Thanks Chris for your comments. "Part B" of these tests is to attach the red filter to the key chain camera instead of the blue one. I have two of ..." | Read more » about 7 years ago
cfastie "Hi azaelb, I was not able to get very meaningful NDVI images from a Mobius ActionCam key chain camera modified with a blue filter. A red filter wo..." | Read more » about 7 years ago
eustatic "hmmm, having trouble making snapshots, but i finally got this to work! these files are so huge.. " | Read more » over 7 years ago
cfastie "Hi Scott, A Gigapan account is free, although you can pay for commercial features. The minimum limit on all gigapan uploads is 50 megapixels (not m..." | Read more » almost 8 years ago
eustatic "chris, how does one create the embedded display you've made in Gigapan. i love the way you can display your photos. I've tried signing up for gig..." | Read more » almost 8 years ago
Philgib "Excellent ! " | Read more » almost 8 years ago
patcoyle "Excellent results. The package is a great value.Thanks! " | Read more » almost 8 years ago
cfastie "djibi2, That would be a great test. Even better would be three cameras (RGB, NIR, infrablue). Most infrablue cameras do not capture as pure an infr..." | Read more » almost 9 years ago
djibi2 "If one of your cameras in the "two-camera" flight was using the Superblue filter couldn't you create NRG photos from that? Then you could do a dir..." | Read more » almost 9 years ago