| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| nedhorning | "It's worth testing but those cards you link to look promising. From my experience it's the bright target that is more of a problem than the dark ta..." | Read more » | over 5 years ago | |||
| warren | "ah, good point. I guess both are relevant. We could distribute them in a dark envelope or folder, perhaps. Yes, i also wondered about this -- bot..." | Read more » | over 5 years ago | |||
| 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 | |||
| 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 | "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 » | almost 7 years ago | |||
| suman | "Hello Ned, Thank you so much for your prompt reply.I appreciate it. Sure, will do .. " | Read more » | almost 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 » | almost 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 » | almost 7 years ago | |||
| nedhorning | "Hi sujayj - I uploaded files with the target descriptions and reflectance information to my Google Drive: https://drive.google.com/drive/folders/0B..." | Read more » | about 7 years ago | |||
| sujayj | "@nedhorning I have been looking to carry out calibration but was halted by the expensive costs of targets. After reading through your article, I re..." | Read more » | about 7 years ago | |||
| nedhorning | "Hi jenjimah, Testing any of these and reporting back would be worthwhile from my perspective. One word of caution is that these are very bright re..." | Read more » | about 7 years ago | |||
| jenjimah | "Hello Ned, thank you for all your work on this subject. Currently I am looking for low-cost materials that can be used as reliable standards for N..." | Read more » | about 7 years ago | |||
| nedhorning | "Hi Jeff - This should be the image. Let me know if this is ok or if I need to post it some other way Ned " | Read more » | over 7 years ago | |||
| warren | "Hi, Ned - do you think you could post the original images from which you generated your NDVI? Thanks! " | Read more » | over 7 years ago | |||
| nedhorning | "Hi kaushalsingh – The three target reflectance values you note seem like a good choice to me. At this point I do not have study material in additi..." | Read more » | over 7 years ago | |||
| kaushalsingh | "@nedhorning You got it right Ned. I am trying to calibrate the image using a reference target before you calculate NDVI. Suppose, I have 3 target ..." | Read more » | over 7 years ago | |||
| nedhorning | "Hi kaushalsingh – Ait seems as if you are trying to calibrate the image using a reference target before you calculate NDVI? If that assumption is a..." | Read more » | over 7 years ago |