Thanks for all the responses. I will try to refine my testing a bit to make sure everything is consistent. I did test the calibration at work and it got my 2 displays calibrated closer to each other in 10 minutes than I could achieve with publicly uploaded ICC profiles and manual adjustments after hours. Looks to be a very versatile device.
I have a USB on the go cable I will try with an android tablet and ArgyllPro ColorMeter DEMO version as well as BabelColor evaluation copy. Are there any open source or free/cheap things to try? Argyll’s command line tools seem pretty full featured but they don’t show the same eye candy of your BabelColor screen captures!
I thought i read somewhere you could make your own spectrum image with the XY data, can you elaborate? Maybe i can just make my own program to read .sp output and plot exactly what i need
You can graph the spectrum in Excel for example, but not using the CIExy data. That’s just the tint coordinate. Spotread -s gives you the necessary wavelength data for that. Or plots the spectrum with -S.
It has a calibration feature for CCT and lux so it could work. I’ll have to check it out.
edit: did some tests, on my phone (the ancient Motorola Moto E) the CCT reading doesn’t work since the phone doesn’t have an RGB front light sensor and its lux readings are all over the place and wildly vary with different CCT and CRI sources. So, may or may not work depending on the device.
I usually just take a single measurement and log the data by piping the output to a file, because spotread doesn’t save all the data in the log. Or just copy and paste the text from the command line window. After first calibrating, use whatever parameters and -N -O > log.txt
Can somebody tell me how to calibrate the colors on a projector connected to one of those stupid fruit-branded all-in-one desktop computers? At our church, the media computer is a Mac of some sort, a few years old. The projector is connected by HDMI over Thunderbolt, IIRC. The colors are horrible! Blues are over-saturated while reds are badly washed-out. I tried the on-board “monitor calibration” …thing on the Mac, but it only had brightness, contrast, maybe gamma, but no per-color-channel fixing. The projector itself has per-color-channel controls, but they don’t help, so the problem seems to be in the signal from the Mac! The LCD monitors connected to the Mac show colors “fine” though. Just the projector doesn’t. So, I don’t know what the deal is actually. Help?
I downloaded the "White Balance Color Temp Meter" to my Pixel 3 and tried it out. Readings were taken on lower modes, in a dark room, with a sheet of printer paper as the backdrop.
Rovyvon Aurora A8
Olight S1R
Nitecore TUP, LH351D mod
FW3A (3D)
Nitecore P18, XHP35 Hi swap
Armytek Elf C2 (Warm)
Expected
5000
6000
5000
5000
4500
4000
Test 1
4600
5320
4660
4540
3810
3620
Test2
4510
5380
4440
4440
4300
3750
Average
4555
5350
4550
4490
4055
3685
Difference
-445
-650
-450
-510
-445
-315
I have no source for the Elf C2 CCT and guessed at the expected value. If I shift all the values up by 500, using the average of two readings:
Rovyvon Aurora A8
Olight S1R
Nitecore TUP, LH351D mod
FW3A (3D)
Nitecore P18, XHP35 Hi swap
Armytek Elf C2 (Warm)
Expected
5000
6000
5000
5000
4500
4000
Corrected average
5055
5850
5050
4990
4555
4185
These now fall within about 150K of the values I was expecting. Taking more samples would likely improve the consistency as well. Very promising!