activity:infrared
activity:infrared


Author Comment Last activity Moderation
saberali0721 "If you're a fan of hunting, the 8Xbet trò chơi săn mồi in Vietnam might be for you. This card game is a modern version of the traditional Vietnames..." | Read more » 3 months ago
warren "I posted an activity for doing NDVI-like work using a camera like this -- with a coefficient (on the output of NDVI, so like "boosted" NDVI) here: ..." | Read more » over 4 years ago
warren "Ah! https://publiclab.org/notes/cfastie/08-20-2013/white-balance-recovery Flashback! " | Read more » almost 5 years ago
warren "I guess to evaluate how well the 2x blue boost I posted above worked, we'd have to compare it to a better system, right? If other folks take a phot..." | Read more » almost 5 years ago
cfastie "I have tried several times to adjust the histogram of bad infrared photos. It has always failed and I don't know why. I assume it is because the ad..." | Read more » almost 5 years ago
warren "Hmm, could we manually multiply the blue channel by 2 or 3 to do a "post-processed white balance"? Of course this would need to be calibrated, but ..." | Read more » almost 5 years ago
cfastie "A single camera NDVI system with a red filter should produce a photo with very turquoise foliage. The blue channel (NIR) should be much brighter th..." | Read more » almost 5 years ago
warren "Incandescent white balance seems to work all right! But wait, here it is in NDVI using http://infragram.org -- black is zero NDVI, white is 1.0: ..." | Read more » almost 5 years ago
warren "@amanda and I did a take apart session and this is pretty easy to do with a good pair of pliers -- wire strippers worked well! " | Read more » almost 5 years ago
warren "Does anyone have some more photos of this conversion process we could show here, more step-by-step? " | Read more » about 5 years ago
cfastie "The new filter can be inside the camera or in front of the lens. If it is in front, it will get scratched and might be bent (not flat), but it is e..." | Read more » over 5 years ago
rrstrauss "@azaelb There's something I don't really get. Basically what we need to do is to remove the ir cutter from inside the camara and place the red filt..." | Read more » over 5 years ago
warren "Also see this page collecting cheap cameras of this type: https://publiclab.org/questions/warren/05-20-2017/cheap-lightweight-gopro-alternatives-fo..." | Read more » over 5 years ago
warren "These or similar cameras are as low as $40 now! https://www.amazon.com/gp/aw/d/B01DG9UMS6/ref=mp_s_a_1_2?ie=UTF8&qid=1497436247&sr=8-2&..." | Read more » over 5 years ago
liz "This is amazing feedback!!! Thank you so much, i can't believe i just saw this now. " | Read more » over 5 years ago
dbehr "Thx. @cfastie " | Read more » almost 6 years ago
cfastie "Trying slightly different values could yield better results in some situations. CLF_SYSCFG.TXT " | Read more » almost 6 years ago
dbehr "Hi, I have Mobius Infragarm cam for NDVI. I can't locate the White Balance settings for the mSetup program. Can you pls. give the values or a link..." | Read more » almost 6 years ago
suman "i want to buy DYI plant health analyzer filter......i tried to buy from public labs but it's already out of stock. How can i possibly buy it for in..." | Read more » about 6 years ago
azaelb "Thanks warren, I got these cameras from Amazon, vendor digital_family, product ASIN B01FLVPZNY. It is now under $60. On pictures I just had some pi..." | Read more » about 6 years ago
warren "Also do you have any pics you took with the camera to share? Raw and NDVI for comparison? Thank you!!! " | Read more » about 6 years ago
warren "Wow, amazing -- do you have a link to where you can buy this camera, and any data on how much it weighs? It could be a great alternative for people..." | Read more » about 6 years ago
cfastie "I like #4 too. I don't have a good answer for the type of glue. Something thick and quick drying. It does not have to be sticky, it just has to for..." | Read more » almost 7 years ago
talha "Thank you very much for your quick and informative answer, Mr. Chris. Among those choices, which one do you suggest? To me, #4 looks ideal (light c..." | Read more » almost 7 years ago