| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Tbtouaki | "Hi @Jakub I re-read lots and lots of posts here, but basically depending on the IR filter you use, you should use a color card, a red card to set ..." | Read more » | over 8 years ago | |||
| Jakub | "Hi! @Tbtouaki Could You explain, how You calibrated the WB on Your camera? Best regards, Jakub " | Read more » | over 8 years ago | |||
| Jogomez74 | "Cfastie and Agustin If we try to change de index co-dominium? I mean 0 to 1. And the equation of NDVI index must be.. NDVI 1= (1/2)(NDVI+1) = (1/2)..." | Read more » | over 8 years ago | |||
| CHUMBA | "Hello @cfastie, thanks for your opinion it really help us out. We are so new on this issue, as I commented you on other talk we just broke a camera..." | Read more » | almost 9 years ago | |||
| cfastie | "Hi CHUMBA, I have never seen the inside of a Samsung camera, so I can't be of any help. There is probably a filter somewhere. Maybe it is glued to..." | Read more » | almost 9 years ago | |||
| CHUMBA | "Hi @cfastie, I wonder if you know How take out the IR filter from a Samsung DV150-f, I have one, I broke it, and I did not find the IR filter anywa..." | Read more » | almost 9 years ago | |||
| cfastie | "Hi CHUMBA, It looks like the Rosco 116 is a very good filter for NDVI. Compared to the 2007, it passes less red, has a steeper cutoff between red ..." | Read more » | almost 9 years ago | |||
| CHUMBA | "Hi I have been testing with one particular filter wich is the 116 Medium Blue Gree, because the 2007 was not available for sale at the moment. I am..." | Read more » | almost 9 years ago | |||
| vdiallonort | "Thanks for your answer, i found some not to expensive filter that block above 700 nm,and some that block under 700 nm so it's not the perfect solut..." | Read more » | almost 9 years ago | |||
| cfastie | "vdiallonort, If you are going to use a single camera with the IR block filter removed, there are two options. If you can take two photos without m..." | Read more » | almost 9 years ago | |||
| vdiallonort | "Hello,Sorry for the newbie question, i am trying to experiment on NDVI, i just remove the IR filter on a EOS 1000D so i am looking for filter i can..." | Read more » | almost 9 years ago | |||
| warren | "Each ```` has to be on its own line, then it should work. Thanks, Ned! " | Read more » | almost 9 years ago | |||
| nedhorning | "I posted it on GitHub GIST: https://gist.github.com/nedhorning/f384d9afcc043741def3 " | Read more » | almost 9 years ago | |||
| warren | "Hmm, I think I need a username too? To post formatted code, you can use four ` characters -- ```` on lines before and after your code, and it'll d..." | Read more » | almost 9 years ago | |||
| nedhorning | "Hi - I actually thought I posted this a few days ago but for some reason I guess it didn't work. Now when I post it I see that the comments are int..." | Read more » | almost 9 years ago | |||
| geraldmc | "Very helpful Ned, thanks! I'd also appreciate seeing your R script. " | Read more » | almost 9 years ago | |||
| Tbtouaki | "Hi I had wrong white balance for my camera. Thanks everyone for the help. Sorry for the trouble If anyone has any idea on how to save pictures take..." | Read more » | almost 9 years ago | |||
| Tbtouaki | "Hi I had wrong white balance for my camera. Thanks everyone for the help. Sorry for the trouble If anyone has any idea on how to save pictures take..." | Read more » | almost 9 years ago | |||
| warren | "I'd love to see the R script. How do you recommend people select a value for redGamma or percentBlue? " | Read more » | about 9 years ago | |||
| nedhorning | "Hi Jeff - I'm not sure what math you are looking for. For the gamma correction I use: The first step is to remove the effect of the gamma correcti..." | Read more » | about 9 years ago | |||
| warren | "Hi Ned - this is great. If you post the math, I'll try to port it to Infragram as well. Great work! " | Read more » | about 9 years ago | |||
| nedhorning | "Chris - Thanks for pointing that out. I typically clip the values so anything greater than 1 becomes 1 and anything less than -1 become -1. " | Read more » | about 9 years ago | |||
| cfastie | "It looks like the computed index will no longer be between -1 and +1 if you adjust the red value that way. Do you then have to rescale the index so..." | Read more » | about 9 years ago | |||
| nedhorning | "Hi Agustin - Your second equation is one option. Another is: (blue- (red-blue0.8)) /(blue+(red-blue0.8)) You can play around with the factor I add..." | Read more » | about 9 years ago |