| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| viechdokter | "Thanx for explaining all this. Uhm, these "raw pixel data" you talked about, is THIS an electron/photon count? And if so, how long does the normal ..." | Read more » | almost 8 years ago | |||
| viechdokter | "Ah, okay, I forgot about the "%" sign. I knew I was missing something. Just didn't know what exactly. Thanx for the quick answers. " | Read more » | almost 8 years ago | |||
| viechdokter | "Sounds great so far. One question: if you put a second slit right in front of the grating/webcam subset - wouldn't the light be even more parallel? " | Read more » | about 8 years ago | |||
| viechdokter | "@warren: I just had a look at an old spectrum CSV file of yours (3 years ago): https://spectralworkbench.org/spectrums/481 There it was unscaled ..." | Read more » | about 8 years ago | |||
| viechdokter | "Talking about hung-up scripts, it often is a pain in the neck to login to SBW. "Do you trust this site with your identity?" "Yes" "You must login t..." | Read more » | about 8 years ago | |||
| viechdokter | "I could re-scale but ... when everybody here gets the same minimum 2.55 increments here and you want reproducible spectral data then everyone shoul..." | Read more » | about 8 years ago | |||
| viechdokter | "I took the data from the CSV files that Spectral Workbench provides with my spectra. I had a look at one of dhaffners spectrum CSV files and see th..." | Read more » | about 8 years ago | |||
| viechdokter | "Okay, here I combined the 4 channel max/min-difference curves in one diagram so they have the same vertical scale now: And here the combined dat..." | Read more » | about 8 years ago | |||
| viechdokter | "Looks like at least there are no "bad" pixels as they all show about the same amount of noise. The time averaging seems to achieve a very sharp-pe..." | Read more » | about 8 years ago | |||
| viechdokter | "Two thoughts: first, the bees sometimes bring in different sorts of pollen, its not 100% sorted although the bees "try to" sort. second, I'd gues..." | Read more » | about 8 years ago | |||
| viechdokter | "Talking about bits and quantization: I also noticed that certain values (2.55 and multiples thereof like 5.1, 7.65 ...) appear in every spectrum's ..." | Read more » | about 8 years ago | |||
| viechdokter | "@warren:They would be low-noise green if you average them. ;-) @stoft: BTW, I noticed that curves that were averaged over two or more channels l..." | Read more » | about 8 years ago | |||
| viechdokter | "@stoft: Yes, the second try suggests it is probably more a noise problem. I will re-do the test very carefully and see what a third data row brings..." | Read more » | about 8 years ago | |||
| viechdokter | "Yeah, I think I could do it. Hmh, I must admit that I only pretty recently started to use Excel-like programs at all. To be honest, your research n..." | Read more » | about 8 years ago | |||
| viechdokter | "Yes, you are right. I, too, like comparable curves better. I used LibreOffice, a kind of public domain "Excel". It plots diagrams automatically and..." | Read more » | about 8 years ago | |||
| viechdokter | "@stoft : sorry I had to revise the research note as there was a big mistake in the red curve. I exchanged it with the new revised red curve and now..." | Read more » | about 8 years ago | |||
| viechdokter | "@stoft : RGGB like in this picture? " | Read more » | about 8 years ago | |||
| viechdokter | "The little thing with the hole in front of your DVD - is this for preventing stray light coming in? " | Read more » | about 8 years ago | |||
| viechdokter | "So... how about turning the (DVD holding) paper thing around and create a paper housing all around the wooden block with a parallel surface, a rect..." | Read more » | about 8 years ago | |||
| viechdokter | "Ooops! Guess I tried to re-invent the bicycle here, huh? Looks like all my thoughts have been thought before - and many more... ;-) Will read it ..." | Read more » | about 8 years ago | |||
| viechdokter | "BTW I wonder if we could find out more about the effects of the camera if you could do this same setup plus statistics again let's say with a green..." | Read more » | about 8 years ago | |||
| viechdokter | "PS: I guess if you use acrylic you need a real dull black finish to prevent stray light. PPS: when I thought about a new setup I also came to a "C..." | Read more » | about 8 years ago | |||
| viechdokter | "Hi Chris, do you mean "sit flush" as in "parallel", "pressing tightly against it"? I thought you had a good reason for the 20° angle between DVD a..." | Read more » | about 8 years ago | |||
| viechdokter | "For anyone who is interested: https://publiclab.org/notes/viechdokter/04-15-2016/thinking-about-a-more-stable-spectrometer " | Read more » | about 8 years ago |