Troubleshooting; Poor Image Quality On The Screen; Poor Image Quality When Printing - Canon MP-C635 User Manual

Troubleshooting

Poor Image Quality On the Screen

There are two main causes of poor image quality while viewing images
on the screen.
The first place to check for image quality is your Monitors setting.
Locate the Monitors control panel from the Control Panels command in
the Apple menu.
For accurate screen representation of color images on the screen, your
setting should read at least Thousands. Millions is preferable for the best
view while editing images.
Grayscale images should be viewed at 256 Grays, Thousands or Millions.
Viewing Line Art on the Screen
Unlike Color or Gray images, line art images do not look very good on
the screen, particularly in preview ratios. The reason for this is that line
art images do not benefit from the perception of smoothing when
continuous tones are viewed. Normally, line art scans are performed at
very high resolutions (in excess of 300 dpi). Since a computer monitor is
72 dpi, it is not capable of reducing the view effectively.

Poor Image Quality When Printing

Make sure you are scanning in the right mode and resolution. This is
particularly important when working with line art. For example, if you
try to scan line art when the color mode is selected, the resulting images
can have blurred or jagged edges.
See your documentation for the other programs you are using in the
production of your art. Each program deals with output in a slightly
different way and there are some subtle issues that can make a major
difference in output quality. Ask yourself if you are familiar with the
following concepts in the software you are using:
Did you set a halftone or line screen frequency in the program from
which you are printing?
Is there a PostScript
Finally, be sure you read the section "How ScanTastic Calculates
Resolution" earlier in this chapter.
Chapter 6
® problem with your software?
Scanning With the MultiPASS C5500 6-25