white-balance
white-balance


Author Comment Last activity Moderation
Alia999 "Here is Link for best answer " | Read more » about 9 hours ago
12A "https://apkashub.net/ " | Read more » 4 days ago
bhamster "Hi @jdetka, this question by @patalbright and the comments section might have some tips to try: How to find the sweet spot for manual white balance..." | Read more » 4 months ago
warren "Also noting this page with good notes on blue filters: https://publiclab.org/questions/patalbright/10-20-2020/how-to-find-the-sweet-spot-for-manual..." | Read more » 7 months ago
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patalbright "Thanks, I will try to add an IR spotlight (used also in security camera settings) to add more IR light to this NDVI setup. Has anyone experience wi..." | Read more » almost 2 years ago
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amirberAgain "Yes, you are correct that incandescent lamps are far less efficient than LEDs. You should be able to find LEDs centered around 740mn, try looking a..." | Read more » almost 2 years ago
cfastie "As amirberAgain says, illuminating the plants with a balance of NIR and visible light similar to sunlight will make interpretation of the NDVI resu..." | Read more » almost 2 years ago
patalbright "Thanks @amirberAgain My full spectrum LED lamp produces some light in the IR spectrum as well. However, I do not want to have a too high intensity..." | Read more » almost 2 years ago
amirberAgain "My experience with broad illumination for spectral imaging is to prefer an incandescent type lamp, sometimes with a blue LED in addition to that. H..." | Read more » almost 2 years ago
patalbright "Hi @amirberAgain, thanks for sharing this. You are absolutely correct - I use an LED with a sunlike spectrum but it is a bit weak on the NIR side o..." | Read more » almost 2 years ago
amirberAgain "Hi @patalbright, A couple of things 1. Use whit Styrofoam as a reference white, try to find one that's Matt and not glossy. 2. The light source you..." | Read more » almost 2 years ago
patalbright "Thanks a lot liz, it is a super interesting project for me and makes a lot of fun! Happy to get additional insights from your end if there is anyth..." | Read more » almost 2 years ago
liz "Super excellent documentation! CC @cfastie " | Read more » almost 2 years ago
patalbright "Hi Petter Thaks a lot for your comment, glad to have followed a similar approach as you did! Of course I also checked our post on this topic Link a..." | Read more » almost 2 years ago
petter_mansson1 "Hello Patrick, Seems like we have had a similar approach using the PiNoIR camera. I went with the same approach as you. Trying to adjust the awb ..." | Read more » almost 2 years ago
nstarli "Where can I find the blue calibration card? I could not find it on the public lab store. " | Read more » almost 3 years ago
warren " Hi! Noting this project which may be of interest: https://gitlab.com/bath_open_instrumentation_group/picamera_cra_compensation And pinging @magg..." | Read more » over 3 years ago
petter_mansson1 " Hello, my input might guide you in the right direction. Different environments require different settings so it might be hard to generalize. I did..." | Read more » over 3 years ago
cagiva "@cfastie, You were absolutely correct. The Blue card from PublicLab arrived today so I redid the white-balancing calibration with it and I got much..." | Read more » over 3 years ago
cfastie "Performing a custom white balance on a blue-filtered NIR camera fools the camera into exaggerating the brightness of the red channel. The red chann..." | Read more » over 3 years ago
warren "@warren awards a barnstar to Claytonb for their awesome contribution! " | Read more » about 4 years ago