Comments

Author Comment Last activity Moderation
stoft "Ah, good. Glad you could view the additional data and figured it out. " | Read more » over 6 years ago
stoft "Yes, clearly all but the last image shows compression in the Green (and Red though less). Because the process of spectral data from a webcam does n..." | Read more » over 6 years ago
stoft "The camera's I've used seem different in this effect but you might try to hunt down the technical data sheets from the Mfg -- sometimes they have a..." | Read more » over 6 years ago
stoft "@Tehnicni, I'd agree that any detector-specific non-linearity is likely very small compared with the effect you've presented. I'd guess the more li..." | Read more » over 6 years ago
stoft "This is and interesting observation and thought experiment. And I'd agree that controlling a light source's intensity while monitoring the camera's..." | Read more » about 8 years ago
stoft "@viechdokter yes, having a stable source helps isolate the noise source. I chose the Solux as I could measure the current as an independent check o..." | Read more » about 8 years ago
stoft "Jeff; I'm glad I was clear. The mechanics is like the rest; it starts with the objective / spec that it is an optical device. That immediately rule..." | Read more » about 8 years ago
stoft "@viechdokter:, thanks; just a lot of years of practice. Not to worry, your's are logical and thoughtfully organized. Jeff, thanks. Yes, new observ..." | 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 » over 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 » over 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 » over 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 » over 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 » over 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 » over 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 » over 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 » over 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 "Yes, the Solux4700KSpectrum file contains Solux's 4700K lamp output spectrum, after a 3-5min warm-up period +/-200K on the center color temperature..." | Read more » over 8 years ago
stoft "Sure; they are just different file types (content). Initially, for testing, there could be just one "default" selection with buried data as a proof..." | 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 "The correction data is in a CVS file and the Solux data is in a TXT list file -- both with 2 columns (nm,value). The data should remain in this (nm..." | Read more » over 8 years ago
stoft "Jeff - Yes, it may be possible (with some modifications) to use your new feature code for a 'default' gain correction. Also recall my later researc..." | 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 » about 9 years ago