| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| yaina | "This is this illuminating article for all of us. Extremely incredibly seriously incomprehensible content parts. We essentially gain searching state..." | Read more » | almost 5 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 » | almost 5 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 » | almost 5 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 » | almost 5 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 » | almost 5 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 » | almost 5 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 » | almost 5 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 » | almost 5 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 » | about 5 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 » | about 5 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 » | about 5 years ago | |||
| nickyshen0306 | "Thanks for giving me so many solutions!! I will try it. " | Read more » | over 5 years ago | |||
| lfent | "@cfastie I found that I needed the heavy cyan filtration (at the expense of all the exposure variables you mention) to achieve an image approximati..." | Read more » | over 5 years ago | |||
| cfastie | "@lfent, Is there any difference between using two filters and using one filter if both photos are exposed so the photos have the same general brigh..." | Read more » | over 5 years ago | |||
| lfent | "Yes, a cyan filter will block the red light from the red-NIR pixels, may I suggest the Rosco 4390 CalColor 90 Cyan gel filter. I found that I need ..." | Read more » | over 5 years ago | |||
| nedhorning | "Here are a couple ways to do this. One is to use two cameras mounted as close as possible to one another with the shutter release synchronized to b..." | Read more » | over 5 years ago | |||
| nickyshen0306 | "Thank you for your helping hands!! " | Read more » | over 5 years ago | |||
| cfastie | "The inexpensive red and blue filters used in DIY single camera NDVI systems typically block most green light. So the camera's green channel capture..." | Read more » | over 5 years ago | |||
| kauemv2 | " Hello, I have a photo take with this kind of sensor: https://www.dropbox.com/s/7dddzda6at9d8a7/2019_0502_154807_246.JPG?dl=0 Hope that these one..." | Read more » | over 5 years ago | |||
| ARMann | "@warren - its probably a MAPIR Survey 3 camera: https://www.mapir.camera/collections/survey3 " | Read more » | about 6 years ago | |||
| warren | "Hi, can you share an image that you've taken with this camera? Where did you get the camera? Cool! " | Read more » | over 6 years ago | |||
| JLJ | "Hello, There is no official way of attaching the filters that I am aware of. It is a common question, and I had it myself when the camera came. Un..." | Read more » | over 6 years ago | |||
| cfastie | "There is no information at the Public Lab store about what filter is used except that it is a red filter. I suspect the filter is a Rosco `#19 filt..." | Read more » | over 6 years ago | |||
| RexToother | "Sorry, I thought that was going to be posted directly to the product page. Here is the link to it: https://publiclab.myshopify.com/products/infragr..." | Read more » | over 6 years ago |