| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "I also updated http://publiclab.org/wiki/infragram#Filters with red/blue filter information. I believe all webcams are CMOS sensors so I'm not actu..." | Read more » | over 10 years ago | |||
| warren | "The blurry photo looks interesting though... " | Read more » | over 10 years ago | |||
| warren | "Hi natalie- it looks like the focus is a bit off... You actually don't have to remove the lens or anything to test this, you can just tape some red..." | Read more » | over 10 years ago | |||
| warren | "Hm, interesting. Sometimes the glues they use will melt when you heat them with a hair dryer, which could be worth a try. If you manage to convert ..." | Read more » | over 10 years ago | |||
| daddyboomalati | "No, it actually looks a lot like camera one above. I have been reading about light leakage in the other cheap cameras, so I will probably bite the ..." | Read more » | over 10 years ago | |||
| warren | "Sorry, do you mean Mobius action cam? @cfastie did a great conversion of one of those, here: http://publiclab.org/notes/cfastie/04-22-2014/mobius-i..." | Read more » | over 10 years ago | |||
| daddyboomalati | "I have an Emerson Action Cam that looks a lot like the camera in your first photo. The lens appears to be glued irreversibly in place with cyanoacr..." | Read more » | over 10 years ago | |||
| ttaylor | "Many thanks to Ned and the other conversion pioneers. On my second try I followed these instructions and successfully converted an A2200. On my fi..." | Read more » | over 10 years ago | |||
| cfastie | "I guess it depends which camera and spectrometer you want to connect. A good approach might be to make a 3D printable Ebert. That could work with m..." | Read more » | over 10 years ago | |||
| warren | "Wow cool Chris. I wonder if we could design a 3d printed adaptor between the camera and a spectrometer. " | Read more » | over 10 years ago | |||
| cfastie | "Thanks for the link. For my ghost hunting, I have been buying PowerShot A590s for $20-$40, plus a $5 filter tube that snaps on, plus an $8 IR filte..." | Read more » | over 10 years ago | |||
| PlanetenPaultje | "Took me a while to find the URL again: http://www.angelsghosts.com/store/viewitem.php?productid=16 I think the price has gone up a bit, I paid jus..." | Read more » | over 10 years ago | |||
| cfastie | "Do you have a link for those IR filters? " | Read more » | over 10 years ago | |||
| PlanetenPaultje | "Forgot to mention: There are IR pass filters to be had specifically for this type of camera. They come with glue buds and they fit perfectly on the..." | Read more » | over 10 years ago | |||
| warren | "I just followed these instructions and converted an A2200 -- thanks! " | Read more » | over 10 years ago | |||
| warren | "...the plant pixels will have the biggest values for both R and B and the difference between them is therefore likely to be bigger. Yeah, the idea..." | Read more » | over 10 years ago | |||
| PeeBee | "Thanks cfasie. I understand now the exposure issue you raise. But you seem to assume the different exposures are an unknown, which it strikes me ..." | Read more » | over 10 years ago | |||
| cfastie | "To compute NDVI, you have to know the relative amount of light in a visible and an NIR band being reflected from plant leaves. The difference betwe..." | Read more » | over 10 years ago | |||
| air_maiden | "I too am interested to see whether a non-modified camera and a camera with the IR filter removed can be used to calculate NDVI. Could you please cl..." | Read more » | over 10 years ago | |||
| cfastie | "That's a really clever idea, and I think it might work. However, it assumes that: The photos must be simultaneous if anything in the scene is cha..." | Read more » | over 10 years ago | |||
| PeeBee | "Thanks cfastie. I don't think I understand the need for the Wratten filter. My understanding is: A camera with just the IR filter removed (i.e. n..." | Read more » | over 10 years ago | |||
| zorn | "Ah, thanks for the answers! Makes it much clearer now.... As i told before, i want to have the possibility to tae normal Pics and pure NIR.... I ..." | Read more » | over 10 years ago | |||
| cfastie | "I see what you mean when you say that the difference between the blue and red channels is correlated with the presence of plants. Your monochrome i..." | Read more » | over 10 years ago | |||
| cfastie | "Zorn, If you remove the IR block filter, the camera will take very strange photos because all three color channels (RGB) will have lots of NIR ligh..." | Read more » | over 10 years ago |