| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "Or without knowing the spectral response of the sensor, you can brute force the response of a dual-camera system by shooting through narrow band pa..." | Read more » | almost 9 years ago | |||
| khufkens | "This is again a reason why you would want to know the spectral response of most imaging sensors. Without this information it will require field val..." | Read more » | almost 9 years ago | |||
| cfastie | "White balance is important for most single-camera NDVI systems, but could be irrelevant to dual-camera systems. The goal is to capture photos with ..." | Read more » | almost 9 years ago | |||
| cfastie | "Bob, this is a great idea. A secret admirer sent me one of these and I was very excited. I didn't know that any mortal could order them for only $3..." | Read more » | about 9 years ago | |||
| bobmathieson | "anyone tried the Rosco sample book... only $3.95 from adorama. The swatches will not be big enough for front lens filters on SLRs but easily big en..." | Read more » | about 9 years ago | |||
| cfastie | "Orangey yellow is good for blue filtered Infragrams. Turquoise blue is good for red filtered infragrams. Gray is bad. Below is a good red filtered ..." | Read more » | over 9 years ago | |||
| liz | "hey @cfastie and @warren , is it true that orangey looking photos indicate a well white balanced blue filter infragram, while blue/greyish photos i..." | Read more » | over 9 years ago | |||
| aguchosolano | "Thanks! " | Read more » | over 9 years ago | |||
| natalie | "Yes that's correct. We have about 100 of the Infrablu filters left. After those are gone, all the new Infragrams have one each of #74, and #19. " | Read more » | over 9 years ago | |||
| warren | "Hi, aguchosolano - the Public Lab store ships internationally and will send Rosco #74 or #2007. I believe they're going to start shipping #19 as we..." | Read more » | over 9 years ago | |||
| aguchosolano | "Thanks cfastie! I am from Argentina, so I will try to contact providers that could send the filters to my country. " | Read more » | over 9 years ago | |||
| cfastie | "Theatrical gels are a good substitute for more precise filters. Rosco #19 "Fire" behaves much like Wratten 25A and costs $7.00 for a huge (20x24") ..." | Read more » | over 9 years ago | |||
| aguchosolano | "Hello! Is there any "easy to find" material that I could use to take some pictures and calculate the NDVI? I mean, before buying expensive filters ..." | Read more » | over 9 years ago | |||
| cfastie | "@camilochiang, Yes, you are correct that with a blue Rosco filter, the photo captured by the converted camera is (more or less) NGB. I think the di..." | Read more » | over 9 years ago | |||
| camilochiang | "Hi cfastie! I really think that your work is pretty awesome and for that im trying to do some experiments with the NoIR camara and your "Rosco filt..." | Read more » | over 9 years ago | |||
| WhiteRabbit | "Interesting results! " | Read more » | almost 10 years ago | |||
| cfastie | "Hi Kendrick90, You're right that single camera systems have their limitations. The Wratten 25A camera produces a very good NIR channel (blue) with ..." | Read more » | almost 10 years ago | |||
| kendrick90 | "I initially found this site while searching for automatic insect recognition because I'm interested in the potential for robots to help us by shoot..." | Read more » | almost 10 years ago | |||
| mathew | "Thanks Chris! " | Read more » | almost 10 years ago | |||
| cfastie | "That nice windows program for Mobius is not official, just written by the isoprop guy. I guess nobody has done it yet for the Mac. Here is the con..." | Read more » | almost 10 years ago | |||
| mathew | "I've been manually editing the config file-- the only thing I can't figure out is how to turn on the custom white balance. " | Read more » | almost 10 years ago | |||
| warren | "Shouldn't it be possible to copy the text config file from Chris's mobius and post it here so Mathew can use it? " | Read more » | almost 10 years ago | |||
| mathew | "Well, I guess that pretty much settles it on the red. I went out flying with only the blue on friday, and haven't processed the results yet. I wa..." | Read more » | almost 10 years ago | |||
| cfastie | "Jeff, all of the photos that day were in bright sunshine under cloudless sky. You can see the afternoon progress in the four panel NDVI for Mobius ..." | Read more » | about 10 years ago |