| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| stoft | "It's ok to have a 'scaled' data file -- but ONLY if that file is clearly identified as such ... like /SpectrumData-SCALED_20160420.csv or /Spectru..." | Read more » | about 8 years ago | |||
| stoft | "Hmmm, well the RAW data should have the same scale units which would be unsigned 8-bit integer from 000 to 255 -- so the Y axis should show noise h..." | Read more » | about 8 years ago | |||
| stoft | "Well, except there's still a problem with the plot. The smallest increment looks to be '4 steps' per scale units of '10'. Either there was some mul..." | Read more » | about 8 years ago | |||
| stoft | "Yes, it's called quantization; the camera only has 8-bits and the scale of the two plots is likely about 3-5x different. Take a look at the 'red' p..." | Read more » | about 8 years ago | |||
| stoft | "I believe both Excel and Quattro Pro provide for multiple plots. I suspect your's may as well -- in Quattro it's under the specialty xy plotting. I..." | Read more » | about 8 years ago | |||
| stoft | "Not to worry, I too find bits to revise after I publish; what counts is fixing the details as they appear. One thought on visualization. When I do ..." | Read more » | about 8 years ago | |||
| stoft | "Right. That's the Bayer filter pattern which sits in front of the imager chip and gives double the signal sensitivity for Green -- a simulation of ..." | Read more » | about 8 years ago | |||
| stoft | "Good observations! Remember that the AGC is likley based on the sum total over the entire image; not per pixel. If there were independent AGC per c..." | Read more » | about 8 years ago | |||
| stoft | "Great! Yes, little glitches do creep in but yes, this Solux corrected plot has a much better shape. I'm guessing the slight curve variation between..." | Read more » | about 8 years ago | |||
| stoft | "Jeff, thanks for pointing this out. I admit I do find the SWB terminology a bit overloaded and the user interface 'unexpected' as I'm not used to i..." | Read more » | about 8 years ago | |||
| stoft | "Understood; though independent checks and tests are still the best method to find hidden anomalies and overlooked issues. When you fix the glitch, ..." | Read more » | about 8 years ago | |||
| stoft | "Just extracted the Slux4700K original data w/rgb and your gain-corr curve data from above, scaled the curves to eliminate that factor and plotted. ..." | Read more » | about 8 years ago | |||
| stoft | "The CSV data files have poorly formatted data. The text of the files often looks like this: 206.809,2.55,2.5500000000000003,7.6499999999999995,2.55..." | Read more » | about 8 years ago | |||
| stoft | "Ok, I got a fresh copy of Chrome to work so here's a Solux 4700K spectrum which was callibrated with a 'CFL2700K' new cal data. https://spectralwor..." | Read more » | about 8 years ago | |||
| stoft | "Ok, just took a look, replied no, still broken. I cleared cache with no effect. I filed another bug report as I cannot even use the switch to a 'ne..." | Read more » | about 8 years ago | |||
| stoft | "Jeff, I was going to provide you with a fresh plot but unfortunately SWB still fails on Firefox -- same "left half only" spectrum with no visible d..." | Read more » | about 8 years ago | |||
| stoft | "Jeff, pretty close. I'll try again, in case I'm not reading your code accurately.... 1 - Solux4700K_spec([nm(300:800),val(300:800)]) = the Mfg's s..." | Read more » | over 8 years ago | |||
| stoft | "Ok, if you look back up above in THIS research note, you will see an Update I have added which includes a single combined plot set using my PLab-3 ..." | Read more » | over 8 years ago | |||
| stoft | "I used the 35W Solux 4700K. eg: http://www.amazon.com/35003-Daylight-Halogen-Degree-Kelvin/dp/B0002GS4GE/ref=sr_1_2?s=hi&ie=UTF8&qid=145202..." | Read more » | over 8 years ago | |||
| stoft | "How about just a partial 'fade-out' of the graphics plot range below 400nm and above 650nm (darkened / subdued colors) and then activate a text not..." | Read more » | almost 9 years ago | |||
| stoft | "Whatever the reference source, that spectral response curve needs to be saved in SWB. Also, as in another SWB issue I filed, SWB data should be tra..." | Read more » | about 9 years ago | |||
| stoft | "Yes, CIR, CCT and other lamp descriptions make knowing what you really get sometimes rather difficult. I have just added a section about calculatin..." | Read more » | about 9 years ago | |||
| stoft | "This was the Sanm camera of the PLab 3.0 + my own upgrade. No blue-film on the DVD and no IR filter. While removing the IR filter from webcams does..." | Read more » | about 9 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 9 years ago |