Author | Comment | Last activity | Moderation | ||
---|---|---|---|---|---|
warren | "I think the best plan may be to try focusing the webcam with the spec open and using a webcam program. It should be focused as it ships, actually. " | Read more » | about 8 years ago | |||
warren | "Hmm, I can't see any spectra on your profile at https://spectralworkbench.org/profile/smurpau Are you sure the earlier spectrum you posted was a f..." | Read more » | about 8 years ago | |||
smurpau | "Thanks for your reply @stoft. The light source is a fluorescent tube (there aren't any CFLs available here). I also have a green flashlight and my ..." | Read more » | about 8 years ago | |||
cfastie | "There is probably someone living down the street from you who knows the names of all the trees in Berlin and would be flattered if asked to share t..." | Read more » | about 8 years ago | |||
warren | "Followup; this is kind of neat; this graph shows the amount of noise removed: " | Read more » | about 8 years ago | |||
Parth | "Hi Chris, Thank you very much for elaborate me more about filter and also for clear up my confusion. I read your research note regard the Dual ba..." | Read more » | about 8 years ago | |||
liz | "Oh hey Cort! Great to see your work again! " | Read more » | about 8 years ago | |||
warren | "OK, I apparently burned out my Trinket somehow, because I can't re-upload; but i have a 2nd one. I uploaded the latest version of the sketch (which..." | Read more » | about 8 years ago | |||
warren | "I was able to upload the sketch, but it only changes once per second -- i was hoping for a smoother change, and I'm also not sure it's ever outputt..." | Read more » | about 8 years ago | |||
warren | "So awesome, thanks Cort! I modified your code for the Trinket and put it on Codebender.com, using pin #4 (analog pin 2) for the potentiometer and p..." | Read more » | about 8 years ago | |||
shanlter | "Thanks @DavidMack, the calculation method as well as the EPA's guide are very helpful! " | Read more » | about 8 years ago | |||
hagitkeysar | "Thanks Nick! bigger and badder sounds good :) pls email me you address I'll send the booklet to you. " | Read more » | about 8 years ago | |||
cfastie | "Correction: When I calibrate Corrected Snowy CFL (with itself), I can get a Fit as good as 5. But the two spectral images are not well aligned when..." | Read more » | about 8 years ago | |||
cfastie | "Ah, set as in SW set! Here is one with CFL spectra from you, me, stoft, and spectra4cps: https://spectralworkbench.org/sets/3165. All of these sho..." | Read more » | about 8 years ago | |||
warren | "Oh, just the spectra you're looking at to reach those conclusions. Sorry to mix vocab :-) " | Read more » | about 8 years ago | |||
cfastie | "What do you mean by references? " | Read more » | about 8 years ago | |||
warren | "Could you make a set of good double green line references to look at? " | Read more » | about 8 years ago | |||
warren | "There are a few places where we do math -- like convert from 0-255 to 0.000-1.000, and when repeated over many pixels, its possible that there are ..." | Read more » | about 8 years ago | |||
cfastie | "Jeff, I made a corrected (ideal) version of the Snowy Sky CFL spectral image when we were working through this in October. This is the basis for t..." | Read more » | about 8 years ago | |||
cfastie | "Parth, Good question. You might think that digital cameras were good examples of intelligent design, but they are more like living organisms which..." | Read more » | about 8 years ago | |||
Parth | "Hi Chris, Thanks for your quick response. I am little confusing with the NIR light bandwidth because of NIR light's band width is 700 to 900 nm a..." | Read more » | about 8 years ago | |||
stoft | "Yes, the flexibility is good and yes, that plot is better because it doesn't alter what is real and clearly shows the effect of just cutting off th..." | Read more » | about 8 years ago | |||
warren | "Well, i'm not saying this is an important step in any particular analysis -- just that you can do operations like this easily with the transform to..." | Read more » | about 8 years ago | |||
stoft | "Ah yes, the new plots are there. However, the entire shape of the spectra has been shifted so the ratios between peaks are thus different from the ..." | Read more » | about 8 years ago | |||
warren | "Fetching multiple pixel rows is possible with the spectrum.imgToJSON() method in the new v2 API: https://github.com/publiclab/spectral-workbench/b..." | Read more » | about 8 years ago | |||
warren | "As to time-averaging, I think it'd be pretty easy to implement, but would ONLY work if a spectrum is really vertically aligned -- so no uploaded sp..." | Read more » | about 8 years ago | |||
warren | "Hi, Dave - try reloading the page - i briefly edited the spectrum while chasing a bug, so you may have seen it in the wrong state -- tell me what y..." | Read more » | about 8 years ago | |||
stoft | "I'm confused by the two plots. The 'noisy' plot doesn't have the signal so I'm guessing it's an average of what is left after chopping off anything..." | Read more » | about 8 years ago | |||
warren | "So glad that worked! Was getting worried :-) " | Read more » | about 8 years ago | |||
stoft | "Glad this note is helpful. Between using a "clean" CFL spectrum for wavelength calibration, a sharp narrow slit, performing a gain-correction and b..." | Read more » | about 8 years ago |