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OK great I gonna try to do it tomorrow or later, I’ll just have to set the spectro to not use the Argyll drivers.
The guy retired or something like that this year, so instead shuting down business and selling IP, now is free. Or maybe he tried to sell it but did’nt like the offers.
I personally know Danny Pascale. He is a graduate physics engineer.
I used his software from day 1.
I probably found the new freeware software. I might have posted it. I never did try it. Happy with displaycal as measured profile at gamma 2.2 zero offset in displaycal. HCFR I use for gamma 2.2 100 percent offset. Natively the black is closer to bt1886 so bt1886 gamma 2.2 with black compensation is ok. I think your display is crushing the red green and white but reduceing contrast is not the way to fix it. Reduce the gains till no crush. I get crushes undectible by eyes at 96 percent to 100. Had to reduce red gain and then green to get red and green equal and then reduce blue. I had to use the white level check in HCFR.
It does some like a levels problem with that low contrast. Contrast does effect the all the gains 5 percent to 100 percent on my vizio V5-555J01. It makes the 95 work like the 100 with less contrast. It means 5% could not be adjusted. Sadly lower main RGB 2 point gain does the same to the white balance control points.
Ben,
you wrote:
I think your display is crushing the red green and white but reduceing contrast is not the way to fix it. Reduce the gains till no crush.
Do you mind sharing your technique for identifying “crush”?
Here are some news about my 6500K Yuji Sunwave lightbulb. I tried to do ambiant light measurements but I don’t have the ambiant light adapter. LOL… -_- I did emissive measurements and I had consistent results in comparison to this website. I put the spectrophotometer in the black case of the laptop and I turned the lens directly to the lightsource. As I have white walls I don’t think it’s inaccurate. I give you a link to a mediafire folder I created. https://www.mediafire.com/folder/bui3x8aw5e06o/Yuji_Sunwaves_6500K
I hope I did everything right to measure the lightsource in emissive.
The ambiant TM30-20 report shows that green and purples lack accuracy on one of the sample I have at hand but it’s accurate generally speaking. The emissive SPD reports show CCTs close to the D65 whitepoint of 0.312712 / 0.329008 with the CIE 1931 2 deg observer. I also took a measurement using CIE 2012 2 deg observer in HCFR. IDK if it’s useful.
Guillaume,
Can you share the spectral data? And since this is not just a simple “bulb” can you share how you are feeding current into it?
I could try to use display cal to make a ti3 or I will try to find another way if that one isn’t good. Any idea Vincent on how to do it ?
I used my E27 ceiling socket to feed the bulb. I didn’t have used any dimming.
I use the white check in HCFR. Near white shows the red tendency to clip at 99 to 100. My balance is -9 red -7 green -61 blue. I noticed it was better getting green down to red even though green was not clipping red was to low since green to high and pushing red up ran out of red at 95 while still not clipping at 100. Amazing what the internal video processor does. White balance changed from 1st calibrated. Blue went up 1 percent on its own. Red was peaking 20 this morning but now its not. I think its heat or coolness or sensor. It might have self color tunning since the saturation on all colors stayed the same but on 1st calibration they was uneven but delta e was .2 . Sensors have a calibration tolerance. There is a error rate especially on a calibrate display plus. Not so sure about a high money spectrometer.
So this is not a “pictorial” kind of analysis where you are looking at synthetic types of images to judge the “loss” of levels? I’m not familiar with this analysis. The second chart looks a lot like a “Gray balance” chart out of DisplayCAL.
The first chart show the composition of Red, Green and Blue levels on each step of the gray scale? Is that what it is?It not the color manage part. Its the hardware calibration of the display cal use to make a color managed profile. https://www.avsforum.com/posts/63566291/ Thats a link to HCFR 3.5.4.4 .
You can dump spectral measurements with spotread -O file, or you can save them with Babelcolor Patchtool app but I’m not familiarized with this tool, I’ve used it a few times for display verification and since its worse (provides less information than) DisplayCAL HTML report for fars grey range evaluation, i’ve not looked into this tool too much.
So “spotread -v -a -O sample1.sp” will get what you want, maybe adding -H id you s¡wish to see more detail in dual blue spikes.
In fact I didn’t have saved the HCFR measurements. So I can’t give you the SPD. I’ll try to use Displaycal and convert the ti3 to a csv. But that will be for another day.
Here are some news about my 6500K Yuji Sunwave lightbulb. I tried to do ambiant light measurements but I don’t have the ambiant light adapter.
In theory those are serial number related so each i1Pro2 knows the spectral transmision of its cover, but maybe you can find one of those on ebay. The pair will be out of certication, but… it may me a close match to your original cover.
I may try to get the drift in xy ambient light with/without cover on Yuji VTC D50 to get a hint of what xy drift you may be missing without the cover.
