| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "Andres, CHDK settings: It appears that you have the synchronous camera triggering working, so of the other CHDK settings for aerial photography t..." | Read more » | almost 11 years ago | |||
| andresc4 | "Hey Chris thank you for the quick reply! , the photo looks great! , and you were right, i did not use white balance I have the camera just with CHD..." | Read more » | almost 11 years ago | |||
| cfastie | "Andresc4, Your UAV photo pairs are great quality. They are sharp and rectify with each other easily. I used Ned's Fiji plugin to align the pairs a..." | Read more » | almost 11 years ago | |||
| cfastie | "kykytos, This is a really good question. Lots of blue light can pass through a #2007 filter, so a white light viewed through the filter will appear..." | Read more » | over 11 years ago | |||
| kykytos | "Hi, I don't understand how can be blue color the Rosco #2007 VS Blue filter when it allows blue light to pass. We see the color of the objects beca..." | Read more » | over 11 years ago | |||
| jyalarid | "Hi, So with this setup I do not need two cameras?... I just finished making this tonight and I am hoping to snap some pictures tomorrow " | Read more » | over 11 years ago | |||
| warren | "BTW, this post is now the 7th most popular research note (by view count) on the site! " | Read more » | over 11 years ago | |||
| cfastie | "In case others are interested in the answer to this question: The histograms of the infrablue photos are screen captures from Photoshop pasted ont..." | Read more » | over 11 years ago | |||
| cfastie | "Hi jalarid, Yes that is correct. There is lots of active development about which cameras and filters work best, and how to get the most meaningful ..." | Read more » | over 11 years ago | |||
| warren | "That's right, jalarid! " | Read more » | over 11 years ago | |||
| jalarid | "Hi, so if I am understanding this correctly I only need to remove the IR filter from my camera and replace it with Rosco #2007 VS Blue filter. At t..." | Read more » | over 11 years ago | |||
| mathew | "kykytos-- I put Chris out of the filter business . If you are interested in helping us do research on filters, please e-mail me. mathew at publiclab " | Read more » | over 11 years ago | |||
| cfastie | "kykytos, Sorry, I am out of the business of mailing #2007 filter. We are currently testing several different filters with different cameras to choo..." | Read more » | over 11 years ago | |||
| kykytos | "I'd like some of the Rosco filter too. Thanks! " | Read more » | over 11 years ago | |||
| cfastie | "Hi jaluna, NDVI tells us something about plant health because it quantifies the difference between light that is absorbed by plant pigments and use..." | Read more » | over 11 years ago | |||
| jaluna | "Hello cfastie! I follow your job with interest, but there are a thing that I not understand well. You say "A filter can be used to block all red l..." | Read more » | over 11 years ago | |||
| liz | "@Jeff i really like this NDVI color gradient that replaces violet with black. " | Read more » | over 11 years ago | |||
| cfastie | "This set has the Rosco and the halogen. https://spectralworkbench.org/sets/show/366 " | Read more » | over 11 years ago | |||
| warren | "Can you link to the spectra so I can give it a try? Thanks. " | Read more » | over 11 years ago | |||
| cfastie | "Jeff, Your first question: I subtracted the Rosco spectrum from the halogen light spectrum, but the result made no sense at all. So I just used the..." | Read more » | over 11 years ago | |||
| warren | "I've been modifying lots of cameras with the new superblue filter (using the Rosco filter you sent). For those (like webcams) which don't have cust..." | Read more » | over 11 years ago | |||
| warren | "Apparently, from my phone, not nearly well enough. There are disadvantages to a mobile friendly website... Using baseline subtraction in Spectral ..." | Read more » | over 11 years ago | |||
| cfastie | "That's an excellent color table for the heat metaphor. This topic of how to display NDVI deserves much more attention. "It'd be neat to test the r..." | Read more » | over 11 years ago | |||
| warren | "I've been messing with different NDVI gradients, and have been trying to get one which shows "cool" colors below zero, and doesn't circle back arou..." | Read more » | over 11 years ago |