| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| stoft | "Issue 1: Set curve downloads There is a selection of file types for a single curve plot data download but that option is not available for a displa..." | Read more » | almost 10 years ago | |||
| stoft | "Light is a wave, but think about it as particles. The 'beam' of light is aligned within a relatively narrow angle between a slit and the diffractio..." | Read more » | about 10 years ago | |||
| stoft | "Yes, this is a good topic. I did some work on this; maybe it will help. First, the 'size' of the spectrometer (the PLab type) is mostly decided by..." | Read more » | about 10 years ago | |||
| stoft | "They look good in the pic. It is difficult to get a ideal gradients with actual dots or lines. You might try attenuating the florescence light vs l..." | Read more » | over 10 years ago | |||
| stoft | "btbonval - point taken, centriod is for 2D; their line just represents the 'center of distribution' " | Read more » | over 10 years ago | |||
| stoft | "btbonval - true. I was just suggesting a fast integer approximation as a simple means to test and get a 1-number result. The existing work in patte..." | Read more » | over 10 years ago | |||
| stoft | "I think the term you are looking for is the "centroid" -- think of it as the point where the shape/volume/whatever would be physically balanced -- ..." | Read more » | over 10 years ago | |||
| stoft | "Looks promising. Maybe these are obvious but... - Pick 3-5 oils, or oil mixtures, as a reference test set -- low to high density -- then use them f..." | Read more » | over 10 years ago | |||
| stoft | "Good observations -- but why use a CFL which has poor SNR for wide-band averaging because the spikes prevent using higher light intensities for bro..." | Read more » | over 10 years ago | |||
| stoft | "Jeff, Yes, you could double the slit width and double the exposure but you also significantly decrease the resolution. That said, I've noticed that..." | Read more » | over 10 years ago | |||
| stoft | "Ok, so the plots are absorption; which makes more sense. However, the Y axis is labeled "Intensity". It would be more clear to either plot relative..." | Read more » | over 10 years ago | |||
| stoft | "Nice experiment. As I recall, white LEDs have a significant 'bump' at about 430nm, a dip at 470nm and a broad peak about 600nm so I assume the 470 ..." | Read more » | over 10 years ago | |||
| stoft | "Jeff, I constructed a few more slotted filters which just bend a bit and fit in front of the smartphone slit. The camera focus difficulty limits th..." | Read more » | over 10 years ago | |||
| stoft | "Yes, true. No slight intended. I edited my comment to note that 'broken' means only that the disconnect between the app and Chrome Beta is still th..." | Read more » | over 10 years ago | |||
| stoft | "(original comment seems gone...) ...I commented that I did try a pattern but that the auto-focus for the default camera appeared to focus momentari..." | Read more » | over 10 years ago | |||
| stoft | "Ok, guess having the exposure default to max isn't too bad, but actually setting the exposure to max is better. I've seen evidence that the standar..." | Read more » | over 10 years ago | |||
| stoft | "Depends on what you want to monitor. If the whole spectrum is dynamically changing, then maybe not because the relationship between clipped peaks a..." | Read more » | over 10 years ago | |||
| stoft | "Jeff, re: "...scale to live capture...". I'll have to guess that you mean observing spectral responses over time with the idea of generating a 'wat..." | Read more » | over 10 years ago | |||
| stoft | "Sreyanth, Jeff, I may not be up on the latest strategy for the code projects, but I'm still sensing that some concepts are diffuse. Performing fre..." | Read more » | almost 11 years ago | |||
| stoft | "Yes, resolution is affected by slit width; though much less than the intensity change which is related to the square area. I'd had some success in ..." | Read more » | almost 11 years ago | |||
| stoft | "Pascal, Thanks. Hope my posted note on HDR2 is readable. Just a thought on the 'stepped-slit'. I constructed a number of them with the idea of for..." | Read more » | almost 11 years ago | |||
| stoft | "Agreed, there is more than enough work here for two highly motivated contributors. On your HDR example above, two observations: I think there is s..." | Read more » | almost 11 years ago | |||
| stoft | "Sreyanth, Don't give up so easily; I think Pascal has described an enormous amount of work. I'd suggest some collaboration is warranted and everyo..." | Read more » | almost 11 years ago | |||
| stoft | "Jeff, Specific to data/analysis, post-processing can only as good as the source data. This is why I'm focused on first getting that data; other thi..." | Read more » | almost 11 years ago |