| 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 | |||
| jotasbe | "oooh, i very impress by your knowleage, i am arriving NOW to PublicLab, and I find your posts, very interesting, because it is something that i try..." | Read more » | over 5 years ago | |||
| MaggPi | "Thanks again for your comments. Much of this is a work in progress but here is an update: Do you have any information on the proportion of red li..." | Read more » | almost 6 years ago | |||
| cfastie | "MaggPi, This a really promising approach. Do you have any information on the proportion of red light to NIR light produced by your LED combinatio..." | Read more » | almost 6 years ago | |||
| nedhorning | "For the most part I am not able to reliably and accurately validate NDVI calculations. To validate results you would need to have targets with know..." | Read more » | over 6 years ago | |||
| Aman007 | "How you are validating the NDVI calculation " | Read more » | over 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 » | over 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 » | over 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 » | over 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 » | over 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 » | over 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 » | over 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 | |||
| suman | "Hello Ned, I tried using different exposure settings now, and its working, the pixels aren't saturated anymore. Thank you so much for your prompt ..." | Read more » | almost 7 years ago | |||
| nedhorning | "Hi Suman - Using Analyze => Measure should work. It's not uncommon to have high pixel values for bright targets. In fact if the exposure isn't s..." | Read more » | almost 7 years ago | |||
| suman | "Thank you so much for your prompt response Ned... " | Read more » | almost 7 years ago | |||
| suman | "Ohh I get it now. Actually the data has 3 calibration target, but i plan to increase it to 5 targets. I also wanted to know, how i can manually me..." | Read more » | almost 7 years ago | |||
| nedhorning | "Hi Suman - The values from 0 - 1 have been scaled from the original image. The reason I do this is that some image pixel values range from 0 - 255 ..." | Read more » | almost 7 years ago | |||
| suman | "Dear Ned Horning, I calculated image calibration coefficients, using the reflectance data from department's spectrometer and 3 calibration targets..." | Read more » | almost 7 years ago | |||
| suman | "Dear All, As i was going through some literature, i found an interesting paper, "A Mixture of Barium Sulfate and White Paint is a Low-..." | Read more » | about 7 years ago | |||
| suman | "Hello Ned, Thank you so much for your prompt reply.I appreciate it. Sure, will do .. " | Read more » | about 7 years ago | |||
| nedhorning | "Hi Suman, I do not have a peer reviewed manuscript about this work so suggest citing this web page using a style appropriate for websites or blogs...." | Read more » | about 7 years ago | |||
| suman | "Thank you so much Ned for such interesting post. I was keen to know on how i can cite your works for any possible publications. Do you have any pub..." | Read more » | about 7 years ago |