Thanks for the video. Is there a software or a calculator that helps you work out the adjustment once you have established the difference between your sample and the reference sample?
There's no good 1:1 relationship between Δa, for example, and a numeric adjustment to get the color in line. That's where good ICC profiles come in; you build the best profile you possibly can and the color engine does the heavy lifting to get the color as close as it possibly can. Getting the ΔE value just shows you how close you are to the intended color but there's not much you can do with it other than assign a pass/fail grade based on the value.
I need a color measurement device with great resolution and I'm hoping I don't need a spectro. How consistent (delta-e) do you find multiple readings you take off of the same sample? Obviously a consumer device will have a variance of +/- some quantity. My use case is to calibrate manually painted gradations (lots of measuring extremely similar colors), so the smaller the variance the better.
So there's no such thing as "resolution" when it comes to colorimeters or spectrophotometers - it only takes one reading per button press, not multiple readings across a sensor like a camera would. What you're looking for is the smallest possible aperture. The Color Muse has a 4mm aperture size - that's the smallest aperture size I'm aware of for a budget colorimeter. The only 2mm aperture devices I know are spectrophotmeters. As far as variance, yes - there will be some. But for fun I measured the same color swatch 8 different times, varying my position and ortation of the sensor slightly between all readings. The worst reading-to-reading Delta-E I got was 0.55, and the theoretical min-to-max delta-E calculated as was 0.89.
Knowing the sheen is great if you need to know if paint is matte or eggshell. For graphic communication, though, I don't think it's worth the extra cost.
Thanks for the video. Is there a software or a calculator that helps you work out the adjustment once you have established the difference between your sample and the reference sample?
There's no good 1:1 relationship between Δa, for example, and a numeric adjustment to get the color in line. That's where good ICC profiles come in; you build the best profile you possibly can and the color engine does the heavy lifting to get the color as close as it possibly can. Getting the ΔE value just shows you how close you are to the intended color but there's not much you can do with it other than assign a pass/fail grade based on the value.
I need a color measurement device with great resolution and I'm hoping I don't need a spectro. How consistent (delta-e) do you find multiple readings you take off of the same sample? Obviously a consumer device will have a variance of +/- some quantity.
My use case is to calibrate manually painted gradations (lots of measuring extremely similar colors), so the smaller the variance the better.
So there's no such thing as "resolution" when it comes to colorimeters or spectrophotometers - it only takes one reading per button press, not multiple readings across a sensor like a camera would. What you're looking for is the smallest possible aperture. The Color Muse has a 4mm aperture size - that's the smallest aperture size I'm aware of for a budget colorimeter. The only 2mm aperture devices I know are spectrophotmeters.
As far as variance, yes - there will be some. But for fun I measured the same color swatch 8 different times, varying my position and ortation of the sensor slightly between all readings. The worst reading-to-reading Delta-E I got was 0.55, and the theoretical min-to-max delta-E calculated as was 0.89.
Thanks for this video. Do you rate the standard Colormuse over and above the Colormuse 2 that has a integrated calibration cap and a sheen index?
Knowing the sheen is great if you need to know if paint is matte or eggshell. For graphic communication, though, I don't think it's worth the extra cost.