| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "I added an update about suitability of long-tube fluorescent bulbs (non CFLs) for calibration which should be interesting to @liz and maybe @cfasti..." | Read more » | almost 9 years ago | |||
| warren | "Hi, Cindy - can you link to your actual data on SWB? The average should be in the "ideal exposure range" but the important part for the 3 color ch..." | Read more » | almost 9 years ago | |||
| nedhorning | "Several years ago I was thinking of how to build a DIY integrating sphere/monochromator setup but never pursued it. You would want something other ..." | Read more » | almost 9 years ago | |||
| JacobNederend | "http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-1-W4/207/2015/isprsarchives-XL-1-W4-207-2015.pdf This paper has a method for det..." | Read more » | almost 9 years ago | |||
| stevie | "@Cindy_ExCites :) This was awesome. I'm writing a workshop on calibration and scanning and this was Super helpful :). Any chance you've moved on to..." | Read more » | almost 9 years ago | |||
| mathew | "I'm trying to figure out what this flat spot is, its just soo flat! I associate it with a blow out. Digging in to the spectra themselves on your ..." | Read more » | almost 9 years ago | |||
| cindy_excites | "Hi @mathew! So you mean that in all the scans above where I see the intense blue channel had overexposure? As in the post https://publiclab.org/wik..." | Read more » | almost 9 years ago | |||
| stevie | "Cindy this is awesome :) I'm working on a workshop where participants will need to calibrate. This material is really helpful! Thanks for posting! " | Read more » | almost 9 years ago | |||
| mathew | "Cindy the flat spots on your spectra are the blown out blue channel: https://publiclab.org/notes/mathew/09-23-2014/graded-oils-using-uv-fluorescenc..." | Read more » | almost 9 years ago | |||
| semitones | "@warren raman scattering is usually a very weak effect, and not easily seen. The stokes and anti stokes lines are very small compared to the main f..." | Read more » | about 9 years ago | |||
| zev | "fantastic work! " | Read more » | about 9 years ago | |||
| cindy_excites | "Yes, I can post a picture of two cuvettes when I get back to the UK (after Dec. 8th). And yes, I'd like to learn more about the Raman scattering. A..." | Read more » | about 9 years ago | |||
| warren | "Hi, Cindy - so, any of the ones where you just have a sharp spike around 405 nm just mean that there was not any fluorescence, or perhaps just none..." | Read more » | about 9 years ago | |||
| khufkens | "I assume the optical properties of the chip should be relatively consistent, however optics might interfere a bit (create wavelength dependent loss..." | Read more » | about 9 years ago | |||
| warren | "Huh, this is great -- do you think these measurements will be fairly similar across different cameras, if they're all OV5647s? Do you have any extr..." | Read more » | about 9 years ago | |||
| warren | " " | Read more » | about 9 years ago | |||
| warren | "Huh, did your diffuser make it easier to get bright spectra? Why did you choose to use one? The red light bulb is an experimental "fluorescent lig..." | Read more » | about 9 years ago | |||
| warren | "Hi, Cindy - wow, you had spectacularly well-lit scans! Your laser must be quite powerful, or your camera especially sensitive. I wonder what accoun..." | Read more » | about 9 years ago | |||
| khufkens | "Further, note that these values are scaled between 0-100% while the true QE peaks at an efficiency of 53.6% in the blue channels respectively. Rela..." | Read more » | about 9 years ago | |||
| cindy_excites | "Ah, yes, that makes a lot of sense, thank you Ethan! I used the part which seemed to have the least purple residue - leftover from the disc separat..." | Read more » | about 9 years ago | |||
| ethanbass | "Hi, in regards to your question about the placement of the DVD fragment, I think the idea is to align your camera so that it is pointed as close to..." | Read more » | about 9 years ago | |||
| khufkens | "Side note: the above assumes that the OmniBSI chipset as displayed in the documentation is the one residing in the OV5647, which is highly likely b..." | Read more » | about 9 years ago | |||
| Craig | "Excellent " | Read more » | about 9 years ago | |||
| liz | "Here's the thread from the NY-NY local list: https://groups.google.com/forum/#!topic/plots-nyc/X9hc3JD7-nE " | Read more » | about 9 years ago |