User manual

22 • Sharpening an image (unsharp masking)
ColorQuartet 5.0 Pro
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ored image areas, such as a blue sky. In the latter case, try setting Super Sampling to 4. This will
approximately double the scanning time.
Aperture
• The Aperture option in the Unsharp Masking window is relevant for the ScanMate 4000, Scan-
Mate 5000 and ScanMate 11000 drum scanners.
• Normally, ColorQuartet’s automatic choice of aperture should be used. However, you can
manually specify a different aperture if desired.
• For example, to help blur the halftone dots in a previously printed original or to help smooth an
original that is very grainy, choose the next larger aperture than the one indicated automati-
cally.
• Note, however, that ColorQuartet also offers digital descr
eening, which is activated from the
Special Functions section of the Sc
an Setup window. In most cases, this is a better strategy than
manually changing the aperture.
To get interactive feedback on USM changes
Unlike the other color tools, the effect of USM changes cannot be accurately evaluated in the
feedback window. However, you can view, evaluate and adjust image sharpness in the Unsharp
Masking window.
1 • Make a preview scan and crop the desired image(s).
2 • Choose Custom... from the Unsharp Masking menu in the top section of the Scan Setup win-
dow to open the Unsharp Masking window.
• The Feedback section of the Unsharp Masking window should display the
last crop you activated. If the desired image is not shown, use the Folder...
button and Image list to locate it.
• The Navigator field displays the whole image in reduced form. If the whole
image is not visible, you can see more of it by making the Unsharp Masking
window larger.
• Drag the Navigator frame to the part of the image you want to view.