Yet another color matching question!

MV
Posted By
Michael V McCallum
May 22, 2004
Views
233
Replies
2
Status
Closed
Many Thanks to those who helped me before.
Situation:
I have a scanned RGB image I need to prepare for CMYK Digital Printing. I have overcome the initial colormatching issue with the Pantone handheld spectrometer. That works great for good sized areas, but not at all on the small areas. So I need another way to achieve the color in these areas. Currently, I am trying to adjust the color of the matched area to the proper color reported by the spectrometer and then using the eyedropper do assume the smaller areas I can’t read are correct. Does this sound like the proper procedure? I was kinda hoping there would be a function or plug-in to take a sample area and adjust the color of the whole layer to match a given color. Hard to explain. Hope someone understands.
Thanks in advance,
Mike
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Gene Palmiter
May 23, 2004
check out colorpilot.com…might do it for you.
"Michael V McCallum" wrote in message
Many Thanks to those who helped me before.
Situation:
I have a scanned RGB image I need to prepare for CMYK Digital Printing. I
have overcome the initial colormatching issue with the Pantone handheld spectrometer. That works great for good sized areas, but not at all on the small areas. So I need another way to achieve the color in these areas. Currently, I am trying to adjust the color of the matched area to the proper color reported by the spectrometer and then using the eyedropper do assume the smaller areas I can’t read are correct. Does this sound like the proper procedure? I was kinda hoping there would be a function or plug-in to take a sample area and adjust the color of the whole layer to match a given color. Hard to explain. Hope someone understands.
Thanks in advance,
Mike
GH
Gary_Hummell
May 23, 2004
Actually you need to make a global correction to get the unknown color to be accurate relative to the known colors. For example, you may tweak the curves to get the red sample to match the spectrophotometer reading but that doesn’t translate to accurate colors elsewhere. If you scan a greyscale wedge at the same time as the cover, you can produce curves that will globally correct all of the colors. If your measured values are very close to the corrected scan in the areas you can measure, the other colors ought to be fairly close. As I mentioned, the first curves you perfect can be reused as a starting point for the other cover scans so long as your scanner is not automatically changing settings (use manual mode).

Gary

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