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# Infragram question:infragram

Author Comment Last activity Moderation
warren "Yes of course!!! " | Read more » over 2 years ago
yaina "This is this illuminating article for all of us. Extremely incredibly seriously incomprehensible content parts. We essentially gain searching state..." | Read more » over 2 years ago
lev29 "Thank you, Chris! You've given me much to read and think about, but please, don't misconstrue that as meaning you shouldn't add any additional pert..." | Read more » over 2 years ago
cfastie "Using green foliage (or chlorophyll) to set a custom white balance deserves more consideration than I gave it in my last comment. Foliage absorbs r..." | Read more » over 2 years ago
cfastie "The goal of the custom white balance hack is to fool the camera into wildly exaggerating the brightness of the blue channel (when using a red filte..." | Read more » over 2 years ago
lev29 "Thank you so much, Chris! With respect to what to use as a reference to calibrate the White Balance (WB), I have not yet "digested" whether your re..." | Read more » over 2 years ago
cfastie "If your K610 filter is a cutoff filter that passes wavelengths greater than 610nm and blocks shorter wavelengths, then it is similar to many filter..." | Read more » over 2 years ago
lev29 "Thank you, Chris, for helping to clarify my question. In fact, as you suspected, I was misusing the term "bandpass"! Those I signify with a "K" fol..." | Read more » over 2 years ago
cfastie ">> for simple bandpass filters, I use the letter "K" followed by the approximate cutoff wavelength Are your filters bandpass filters or cut..." | Read more » over 2 years ago
warren "Hi, can you share the images you do get, before and after your calibration? " | Read more » over 2 years ago
ThomasTaufan "Chris, please look at my image taken from modified camera using red filter bought from Public Lab. Is this the correct results or should I do some ..." | Read more » almost 3 years ago
zomb23 "Hi Chris, thank you for the quick and comprehensive response. That sounds really promising. I will look into chlorophyll fluorescence and if/how I ..." | Read more » almost 3 years ago
cfastie "I think NDVI will provide some information about the photosynthetic rate of mosses. Moss leaves capable of rapid photosynthesis will probably be ab..." | Read more » almost 3 years ago
cfastie ">>So according to this we should be getting about 10% transmission of red light, does that mean I should subtract 10% of each pixel value in..." | Read more » almost 3 years ago
nstarli "Thanks for the detailed response Chris, this is super helpful! I really appreciate the feedback. So I have actually been provided the full charact..." | Read more » almost 3 years ago
cfastie "I don't know for sure whether your protocol with the RPi camera (use automatic white balance with blue paper) and my protocol with a Powershot (use..." | Read more » almost 3 years ago
nstarli "Thanks for the reply Chris. I have read through pretty much every single one of your posts! So my white balance calibration is the simple one that ..." | Read more » almost 3 years ago
cfastie "I am not familiar with your white balance procedure so I don't know how it is affecting your results. If you can manually set the white balance, se..." | Read more » almost 3 years ago
nstarli "Sorry, I meant to include the cfastie colormap image as well: " | Read more » almost 3 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 "and! https://publiclab.org/infragram-pi " | Read more » almost 3 years ago
warren "Here are some links! https://store.publiclab.org/collections/diy-infrared-photography/ and https://publiclab.org/infragram-pi " | Read more » almost 3 years ago
warren "Just noting that our Infragram Pi Cam kits now ship with onboard software and WiFi: https://store.publiclab.org/collections/diy-infrared-photograp..." | Read more » almost 3 years ago
nickyshen0306 "Thanks for giving me so many solutions!! I will try it. " | Read more » about 3 years ago