By popular demand, here is an example that contains plenty of blue. I think it represents a typical blue color most of us would want for a sky - though there are certainly more saturated blues than this in nature, I believe most of us would be hard pressed to find one.
The image is straight from my digital camera (a rather ancient nikon coolpix 990), using my usual conversion from Apple RGB to Adobe RGB.
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Original RGB image. |
The histograms
below give an idea of how much change has occurred. They
are calculated by subtracting the blue channel of the image
from the original, and using PhotoShop's Image>Histogram
feature.
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After 1 conversion to and from CMYK |
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After 5 conversions |
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Can you see a change after the initial conversion to and from CMYK, or increased deterioration of color or detail after five conversions?
I have printed these three images on the same sheet and shown them to friends - do you think they would be able to tell which image had been converted by looking at the prints?
Still skeptical? Still reluctant to try out CMYK because of warnings you've heard about data loss? If you have a reasonable looking photographic image that contains a bluer blue than this, and there certainly are such images, try your own test, and me the results and I'll verify your findings, and add another test to my web page.
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