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3-6
PowerColor User Guide
The bottom of the target contains 22 steps of gray bordered by paper white and
black. Let’s refer to paper white as a specular highlight (any point that should
contain no color) and black as our shadow point.
By selecting the pointed cursor from the Control bar, you can pick up the high-
light sticky densitometer and drag it to a new location. First, place the highlight
densitometer on the specular highlight. This will cause that area to become our
point of interest and reflect the values in the RGB Highlight fields from the Tone
and Cast Window.
We will now work with the Highlight fields in the Tone and Cast Window. First,
make sure the Highlight and Shadow Cast Correction is set to full. In the Red
field next to the Diffused Highlight label type in “255” and hit Enter. Notice that
both the Green and Blue values changed automatically. This is because the Cast
Correction setting is on Full--The color computer will always keep the RGB val-
ues adjusted based on the Cast setting. You have now made the paper white
patch a specular highlight.
For the Shadow point, take the Shadow sticky densitometer and place it on the
Black patch. In the Red field next to the Shadow label type 0. The black patch
will now become the absolute shadow point.
Of course, setting the input range would be a piece of cake if you only have to
scan IT8’s. Unfortunately, in the real world, not all images have perfect specular
highlights and absolute shadow points. But that’s OK, because PowerColor was
designed for the real world.
The next example is closer to the challenges of everyday scanning: Again, lets
use the bottom of the IT8, but this time we are going to throw out every patch
except #3 and #20. Now patch #3 may exist in an image as a linen table cloth,
pearl necklace, shirt, or countless other objects and materials. The point is that it
is identifiable in the image, and we either know, were told, or have to make an
assumption as to how it should reproduce on paper.
Lets start with knowing that patch #3 should be neutral and the red value should
be 240. Take the Highlight sticky densitometer and place it on patch #3. In the
Red field type in 240 and hit Enter. You have just set a Diffused Highlight and,
because the red value is less than 255, the Catch Light is automatically activated.
Now move the Shadow sticky densitometer to patch #20 and in the Red field next
to the Shadow label, type 10 and hit Enter.
Summary of Contents for PowerColor
Page 7: ...Preface...
Page 8: ......
Page 12: ......
Page 13: ...Installation 1 1...
Page 14: ......
Page 21: ...Getting Acquainted 2 2...
Page 22: ......
Page 44: ......
Page 45: ...Correcting Images with PowerColor Photo RGB Mode 3 3...
Page 46: ......
Page 63: ...Correcting Images with PowerColor Press CMYK Production Mode 4 4...
Page 64: ......
Page 66: ......
Page 80: ......
Page 81: ...Correcting Images with PowerColor Press CMYK Expert Mode 5 5...
Page 82: ......
Page 106: ......
Page 107: ...Unsharp Masking and Descreening 6 6...
Page 108: ......
Page 116: ......
Page 117: ...Scanning Images to Disk 7 7...
Page 118: ......
Page 125: ...Tips and Tricks 8 8...
Page 126: ......