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Chapter 7. Beyond Black and White >  Converting to Grayscale with Channels

Converting to Grayscale with Channels

Let’s start with an image that has lots of colors, good saturation, and plenty of contrast to work with, like the one shown in Figure 7.16 at left. It’s stored on the Course website ( www.courseptr.com/downloads ) as Castle Garden. The version on the right-hand side has been converted to grayscale using Photoshop’s default Image > Mode > Grayscale feature. Knowing what you’ve learned about how Photoshop performs this conversion, you can probably guess what’s wrong, especially with the opportunity to compare them side-by-side. Notice how the red flowers, in particular, tend to blend in with the rest of the blossoms, how the green grass appears to be too light, and the sky is nowhere near as dramatic as it was in the original image.

Figure 7.16. The original image is shown at left. At right, a grayscale conversion using Photoshop’s default tool.



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