Comments

nedhorning commented on NIR Camera Calibration : "Hi Babu, As I was writing this I see you got some good comments - here are some more. Lots of good questions. I'm also looking for answers to som..." | Read more » about 5 years ago
Babu commented on NIR Camera Calibration : "Thanks Cfastie and warren for your comments and suggestions. Can you suggest me some filters that might pass the NIR , Blue and Green and blocks RE..." | Read more » about 5 years ago
warren commented on NIR Camera Calibration : "Hi babu - can you upload an image of vegetation from your camera? It would be really interesting to see. " | Read more » about 5 years ago
cfastie commented on NIR Camera Calibration : "Hi Babu, My limited experience with these techniques leads me to suggest that it will be quite difficult to separate the red and near infrared ban..." | Read more » about 5 years ago
commented on White balance and NIR photography : "Hi all, warm Greetings I am new in NIR photography so i have some questions regarding the white balencing, caliberation etc. Actually i have Nikon..." | Read more » about 5 years ago
warren commented on Mapping Sewage Flows in the Gowanus Canal after Sandy flood damages - the sequel : "Really stunning images, you guys - super super sharp. And a breathtakingly different look to the water -- really concerning. " | Read more » about 5 years ago
warren commented on Calibration Pictures : "Well, it's definitely in focus now, if that's 4". How are your spectra looking now? " | Read more » about 5 years ago
ckmurt commented on Calibration Pictures : "I posted a photo of the barcode at 4". I have other distances at well, its focused from approx 3-5 in. You're welcome to use this on the wiki. " | Read more » about 5 years ago
commented on Portable Energy Scavenging Kit 0.1a : "Really interesting. Have you also seen http://www.bootstrapsolar.com/ which has open sourced a lot of the design and seems to have access to cheape..." | Read more » about 5 years ago
warren commented on Calibration Pictures : "If you have a chance to upload a photo of the barcode while it's out of the case, that can help us narrow down what's going on. Once we solve this..." | Read more » about 5 years ago
ckmurt commented on Calibration Pictures : "I did the IR conversion, I tried to focus it on a barcode 3" away before I assembled the kit. I will try to redo it. Will upload the pic of the lam..." | Read more » about 5 years ago
warren commented on Calibration Pictures : "Did you do the infrared conversion? In any case, I bet your camera is out of focus. You do need to focus it closer, whether or not you do the conv..." | Read more » about 5 years ago
warren commented on Calibration Pictures : "Hi! I didn't realize it was a kit -- i thought you'd built it yourself from scratch. In this case the slit is probably correct since it's been lase..." | Read more » about 5 years ago
commented on Portable Energy Scavenging Kit 0.1a : "Does it mean that 1/6 of the energy is turned into heat when charging? " | Read more » about 5 years ago
jenmansta commented on Mapping Sewage Flows in the Gowanus Canal after Sandy flood damages : "This project was a lot of fun to participate in. Thanks PLOTS, Gowanus Canal Conservancy and Gowanus Dredgers Canoe Club for the balloon mapping da..." | Read more » about 5 years ago
hagitkeysar commented on Ideas from the $10 Kickstarter backers on how they will use the spectrometer : "THIS IS INCREDIBLE. " | Read more » about 5 years ago
Sara commented on Bayou Sauvage Draeger tubes after 4 days : "Hi Jack, Great to hear from you. I'd love to hear more about what you've been working on. I'll send along an email, Sara " | Read more » about 5 years ago
commented on Bayou Sauvage Draeger tubes after 4 days : "HI Sara, Sorry I did not respond to your reply. I am very new to this social media thing and did not pick up on the fact that you had responded. ..." | Read more » about 5 years ago
warren commented on Understanding the spectrum : "Hi, Minot - I'm afraid I can't be of much help, as I am mainly a user of spectral analysis rather than a theorist on why it works :-) But perhaps o..." | Read more » about 5 years ago
patcoyle commented on Cris Benton on TWiT : "Thanks Chris. This is long but worth it. Lots of tips on kites, rigs and RC control and beautiful images. Also the importance of having an intentio..." | Read more » about 5 years ago
gonzoearth commented on New MapBox aerial imagery layer : "this blog post is a nice description of the available public aerial imagery data " | Read more » about 5 years ago
cfastie commented on Spectronic 20 spectrometer for comparison to our own : "That is so much better than any present I have received for a very long time. Don't forget to let it warm up before use! And may you never learn wh..." | Read more » about 5 years ago
straylight commented on Spectrometer testing : "wow, what a useful research note, thanks for taking the time to post it and explain what you did. Interesting to be able to compare the ocean opti..." | Read more » about 5 years ago
cfastie commented on Spectrometer testing : "That's a challenge if smartphone cameras are not very sensitive to low light. More tests are called for, but I think the cheap diffraction grating..." | Read more » about 5 years ago
warren commented on Spectrometer testing : "I think maybe you mean 0.2mm and 0.4mm, mathew? Good to know, both of you -- i'm getting the desktop kit slits cut today!! Thanks. " | Read more » about 5 years ago
mathew commented on Spectrometer testing : "Chris-- When I was doing the spectrometer tests I found that 2mm was too dim to reliably read the spectra with a cell phone camera and settled on 4..." | Read more » about 5 years ago
warren commented on Spectrometer testing : "For the short term, it will prompt you to take a photo, and will allow you to upload it. Once we start on the native app, it will work just like th..." | Read more » about 5 years ago
cfastie commented on Spectrometer assembly in full swing : "Incredible. I wish I was closer so I could help. It looks like lots of fun. Nice sticker. " | Read more » about 5 years ago
cfastie commented on Spectrometer testing : "Alex - That's an good point that some smart phones do HDR. To improve the chances of great results, users of the smart phone spectrometer could tak..." | Read more » about 5 years ago
warren commented on Spectrometer testing : "I'm very impressed that the foldable spectrometer can get such good resolution. Partially, of course, that's the DSLR, but I'm glad that folks with..." | Read more » about 5 years ago