| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| nedhorning | "Hi Jeff - I wasn't sure if you mean varying over time or over the surface. Over time both will vary but from my experience they seem fairly stable ..." | Read more » | over 5 years ago | |||
| warren | "Hi, @nedhorning! I wanted to ask if you thought tar paper that people purchase in a store would have a consistent enough reflectance that you think..." | Read more » | over 5 years ago | |||
| difautsch | "I’ll see ya there! " | Read more » | almost 6 years ago | |||
| sjmanosalvas | "Please your help, I bought the Blue and Red Filter (https://publiclab.myshopify.com/collections/diy-infrared-photography/products/infragram-diy-fil..." | Read more » | about 6 years ago | |||
| cfastie | "Incandescent or halogen lamps emit lots of NIR. Fluorescent, sodium, mercury, and LED lamps do not. The image below is from here: http://perfecthea..." | Read more » | about 6 years ago | |||
| JLJ | "Hello Chris, thank you for the swift and detailed response. Do you have any recommendations for a light source that I can buy? " | Read more » | about 6 years ago | |||
| cfastie | "It is possible to compute a facsimile of NDVI from a single photo taken with a Pi NoIR camera and blue filter. The blue channel in the photo will c..." | Read more » | about 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 » | about 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 » | about 6 years ago | |||
| warren | "Hi, just curious which lens you're referring to? Thanks! " | Read more » | about 6 years ago | |||
| jdburnett | "@dannysmith Your use of the ILS seems sound. Your work will certainly be more defensible if you can use Pagnutti' et. al's method, however, it may..." | Read more » | about 6 years ago | |||
| nedhorning | "Setting up and running an integrating sphere is within your reach for a 12 week course as long as the equipment is working and you have access to s..." | Read more » | about 6 years ago | |||
| dannysmith | "@nedhorning I think you're right about the expecting the unexpected with this camera, when I get back to the lab later in the week I'll run a trial..." | Read more » | about 6 years ago | |||
| jdburnett | "Ned's last comment reminded me of something I found with our equipment a few years ago. My lab had 4 NIR converted cameras. Three had R & IR p..." | Read more » | about 6 years ago | |||
| jdburnett | "@dannysmith I will second Ned's thoughts. I assume you are using raw image format out of your camera to increase bit depth and avoid dealing with t..." | Read more » | about 6 years ago | |||
| nedhorning | "Hi dannysmith - I’m glad to hear the note was useful to get you started. I find it helpful to plot both red and blue channel regressions but I expe..." | Read more » | about 6 years ago | |||
| dannysmith | "@nedhorning thank you so kindly for all of your work, the detail you have put into it has been a tremendous help to me! I have been lucky enough to..." | Read more » | over 6 years ago | |||
| warren | "I think they're 4 inches, not 5 -- sorry for the slow response! " | Read more » | over 6 years ago | |||
| warren | "Note: we now have a guide to setting white balance, although this question still stands for what the settings should actually be. https://publicla..." | Read more » | over 6 years ago | |||
| cfastie | "I don't know how much LEDs vary in their NIR emission. But it's easy to add some NIR LEDs to the mix. There is an advantage to using only artificia..." | Read more » | over 6 years ago | |||
| robotfarms | "Thanks for the in depth answer Chris! If i needed to use this system in low light or night, do you think I would need to add NIR light, or is there..." | Read more » | over 6 years ago | |||
| robotfarms | "Thanks William, I was going to have a play with it in regular RGB color too, and find the best solution. I can have a play with all the variables t..." | Read more » | over 6 years ago | |||
| cfastie | "The NIR illumination is probably not needed because daylight is a very consistent source of lots of NIR (although using NIR illumination at night c..." | Read more » | over 6 years ago | |||
| williampasco | "Hola, yo creo que no va ha ser de ayuda, ya que todas las plantas pueden usar esa luz para hacer la fotosíntesis. He tratado de hacer una diferenci..." | Read more » | over 6 years ago |