Chapter 4: Color Correction in the CMYK Color Space: Production Mode
4-7
Setting the Input Range Manually
To set the Input Range Manually when using the Production Controls, first, per-
form an Auto Range by clicking on the Auto Range icon within the Control bar.
Next, select the Pointed cursor from the Control bar, then click on the diamond
shaped Highlight (white) and Shadow (black) densitometers within the region,
and move them to the desired locations.
Changing the Diffused Highlight and Shadow Point : An Example
It is very important to understand the interaction between the diffused highlight
and shadow point in the image, the diffused highlight and shadow fields in the
Production Controls, and the highlight and shadow cast correction setting in the
Production Controls. One will always affect the other.
•
The sticky densitometers reflect the exact points of interest.
•
The Highlight and Shadow fields within the Production Controls control the
values those points will inherit.
•
The Cast settings influence how the values react to one another when a new
value is typed into one of the fields or when you select a different cast set-
ting.
For this example, an IT8 target is used, although a similar target containing
a gray wedge would work as well.
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 Highlight field from the Production
Controls Window.
We will now work with the Highlight fields in the Production Controls. First,
choose the Settings button in the Production Controls Window, make sure the
Highlight and Shadow Cast Correction is set to full within the Settings Window
that appears. In the Cyan field next to the Diffused Highlight label type in “0”
and hit Enter. Notice that both the Magenta and Yellow values changed automat-
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: ......