| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Hi, @coight! This looks like a spectacular (for real!) project and I'd love to learn more. There are two ways of smoothing that I know of. One is ..." | Read more » | about 9 years ago | |||
| Guillaume123 | "This looks interesting! From a simple spectrometer like the PublicLab spectrometer I would expect the intensity results to be lower than from a pr..." | Read more » | about 9 years ago | |||
| coight | " " | Read more » | about 9 years ago | |||
| warren | "Also, regarding the noise you believe is a result of instability without even applying force to the spectrometer housing, what do you think is the ..." | Read more » | over 9 years ago | |||
| warren | "Hi, Dave - have you had any success reproducing the kind of wavelength drift shown in the example by @priyanka above? Having an idea of how much f..." | Read more » | over 9 years ago | |||
| stoft | "Yes, I understand the wish for simple, cheap and insensitive to construction or handling -- but I'd like to propose some alternative, yet associate..." | Read more » | over 9 years ago | |||
| warren | "Let me also add that I think added stability of OTK attachment to the spec would be great! But I just don't see it as something we have to prioriti..." | Read more » | over 9 years ago | |||
| gretchengehrke | "Thanks for a lot of good thoughts to consider. I agree that the optical paths need to be rigid, both from the slit to the DVD and from the DVD to ..." | Read more » | over 9 years ago | |||
| warren | "Ack, seems like embeds in comments still isn't working. I'll update with just the picture. " | Read more » | over 9 years ago | |||
| warren | "Sorry, I've been coding. Some more thoughts: In the graph I posted of the basic, upgraded, and hi-res spectra, I realize it's hard to say what's m..." | Read more » | over 9 years ago | |||
| stoft | "Thanks - Lots of great feedback. - First, remember that we are dealing with light with extremely short wavelengths -- which is why most optical exp..." | Read more » | over 9 years ago | |||
| warren | "For #4-6, I'm not sure I agree. The rigidity of the attachment of the Oil Testing Kit to the spectrometer itself only has an effect on amplitude, a..." | Read more » | over 9 years ago | |||
| warren | "Hi, Dave - thanks for the input, as always. As to #1, absolutely, as even a small movement can change the position of a spectrum. Do you feel that..." | Read more » | over 9 years ago | |||
| Guillaume123 | "Reply to ctoft musings, Your (ctoft) experiments with the PLab 3.0 spectrometer and PLab oil-test kit prototypes demonstrated the requirement to b..." | Read more » | over 9 years ago | |||
| cfastie | "Yes, those photos are good. Ideal photos have some live plants, maybe some recently dead leaves, and some things that are not foliage. Outdoor phot..." | Read more » | over 9 years ago | |||
| warren | "Specifically, I think we need to encourage people to structure experiments around what these cameras do best at the moment -- comparisons between v..." | Read more » | over 9 years ago | |||
| cfastie | "I think you're right that subjective is the wrong word. Maybe qualitative. A plant with an actual NDVI value of 0.5 may have an infragram NDVI valu..." | Read more » | over 9 years ago | |||
| warren | "Hi, Chris - I've been plugged into several other projects and really didn't have time to do this properly, and there was some confusion over the we..." | Read more » | over 9 years ago | |||
| cfastie | "A standard coefficient is a tough nut. The amount you would want to shift the NDVI values will differ a lot among photos. Exposure and color balanc..." | Read more » | over 9 years ago | |||
| warren | "It looks to me like both offer pretty good differentiation, but that the red filtered version depresses NDVI values. But since we're not assuming a..." | Read more » | over 9 years ago | |||
| warren | "You're right - we need to display the colormap in the saved images too -- but we haven't had any time to do further development on Infragram.org, s..." | Read more » | over 9 years ago | |||
| warren | "The colormap is based on one of yours: " | Read more » | over 9 years ago | |||
| cfastie | "Yes, I can't say much without seeing the originals. Someone familiar with what infragram.org does might be able to infer something. When I follow ..." | Read more » | over 9 years ago | |||
| warren | "Do you think there's nothing you can infer without the originals? I'm guessing you want to look at the blue/red gap? These are the camera serial n..." | Read more » | over 9 years ago |