Comments

cavazos commented on Spectrometer testing : "Chris Thanks for sharing your views. I believe the exposure issue can be fixed by using High Dynamic Range or HDR technique. I'm not a photography..." | Read more » about 5 years ago
cfastie commented on Spectrometer testing : "Hi Alex, I haven't experimented much with webcams yet, so I don't know the answer. I do know that a narrow slit is critical for precisely identif..." | Read more » about 5 years ago
cavazos commented on Spectrometer testing : "Hi Chris, In your opinion, what single item improves most the results of the spectrometer? Better camera? The grating? The spectrometer case? In o..." | Read more » about 5 years ago
commented on Help learning to use MapKnitter : "Hi, thank you for this awesome tool.I'm trying to get an exported geotiff file from a map, but i'm getting the following error https://mapknitter.o..." | Read more » about 5 years ago
warren commented on Preliminary Sample : "Hi, Livio - what kind of sample is it? A water sample from the creek, or a soil sample soaked in mineral oil? If the latter, what did the soil look..." | Read more » about 5 years ago
LCazabon commented on Preliminary Sample : "How are you choosing the plants? Are you using only native species or also non-natives? " | Read more » about 5 years ago
Tom_H commented on DIY Spectrometry Kit paper insert prototype : "I did some reading on spectrometer designs and found what may have been my reason for not seeing the expected improvement by putting in the focusin..." | Read more » about 5 years ago
Tom_H commented on DIY Spectrometry Kit paper insert prototype : "I have comparative images online: https://spectralworkbench.org/spectra/show/1131 with extra focus lens https://spectralworkbench.org/spectra/show..." | Read more » about 5 years ago
mathew commented on Fold-up Spectrometer Instructions : "Thanks All! @ Chris-- it will be printed on black matte paper and laser cut like this: " | Read more » about 5 years ago
warren commented on DIY Spectrometry Kit paper insert prototype : "The webcams we ordered are easy to refocus -- the glue is very soft and a hair dryer can soften it more. So it's not as much an issue for these kit..." | Read more » about 5 years ago
Tom_H commented on DIY Spectrometry Kit paper insert prototype : "Does the very short distance between the camera and the slit cause problems? I found the glue on the webcam lens very difficult to deal with, so I ..." | Read more » about 5 years ago
warren commented on Fold-up Spectrometer Instructions : "Figuring out iOS schedule today, actually. I don't know how long it will take to get a full iOS app but in the short term we should be able to allo..." | Read more » about 5 years ago
commented on Sulfur, sodium detection in flame spectometer tests : "Moderate strength hydrochloric is readily available (in the US) at hardware stores as "muriatic acid" " | Read more » about 5 years ago
donblair commented on Fold-up Spectrometer Instructions : "Mathew -- this is gorgeous. Could we put this on a PLOTS t-shirt, with the publiclaboratory.org URL underneath? I would wear it all the time. Und..." | Read more » about 5 years ago
cfastie commented on Fold-up Spectrometer Instructions : "I assume that a lot of people who will receive these in the next month or so have iPhones. Is there a target date for the iOS app? " | Read more » about 5 years ago
warren commented on New Spectral Workbench analysis interface : "Actually you already can, if you: a) are logged in b) do a calibration and reload the capture interface can you not see wavelengths then? " | Read more » about 5 years ago
pkcyll commented on New Spectral Workbench analysis interface : "Cool. I was wondering when we would be able to see the wavelengths written at the bottom of the graph when taking a spectra. Perfect. " | Read more » about 5 years ago
cfastie commented on Fold-up Spectrometer Instructions : "Really nice work. I guess this will be printed in white on black paper. Or will the pattern and the instructions be printed separately? " | Read more » about 5 years ago
mathew commented on Self-adhesive diffraction grating caps SpectroKit® for cellular : "its still really cool Jean, I love the cap " | Read more » about 5 years ago
commented on Webcam Conversion to (Near-) Infrared : "Hi, thanks for this detailed writeup - I'm in the process of converting my c270 into a IR only tracking device for Freetrack (my 3rd or so). I'm al..." | Read more » over 5 years ago
mathew commented on R-Pi-in-Sky @ LEAFFEST : "Raspberry Pi is going to release a camera module: " | Read more » over 5 years ago
commented on Update on the photo monitoring plugin for ImageJ/Fiji : "Wow, this sounds brilliant. When I download it from Github, though, I get .java files (and other things) but no .jar files, and no manifest I recog..." | Read more » over 5 years ago
nedhorning commented on White balance and NIR photography : "I agree a forest is not a good calibration site. For aerial and satellite sensors a popular calibration site is White Sands in New Mexico. It has w..." | Read more » over 5 years ago
cfastie commented on White balance and NIR photography : "Calibration gardens – flying over a soybean field is a lot easier than flying over a forest. Soybeans are also a lot more homogeneous, and are easi..." | Read more » over 5 years ago
nedhorning commented on White balance and NIR photography : "Another possibility for a forests area is Hubbard Brook Experimental Forest in New Hampshire but that might be a nightmare getting permission unles..." | Read more » over 5 years ago
warren commented on White balance and NIR photography : "Actually what about the Harvard forest? " | Read more » over 5 years ago
warren commented on White balance and NIR photography : "I agree re: meetup -- it'd give me more incentive to keep working on the IRCam too. If there are any aerial imaging calibration garden plots in th..." | Read more » over 5 years ago
nedhorning commented on White balance and NIR photography : "Chris - If you are referring to JPEG images acquired using one of the camera's internal white balance settings then I don't think the histograms fo..." | Read more » over 5 years ago
warren commented on Calibration for non-webcam users? : "Yes, you first open the spectrum page, then search for the calibration you want to copy from in the sidebar, then you click "clone calibration" and..." | Read more » over 5 years ago
warren commented on White balance and NIR photography : "Would we be able to use the PLOTS spectrometer to see if a gray card or something similar has an even response (flat spectrum) into the NIR portion..." | Read more » over 5 years ago