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6.6.3 Setting the Dotsize
The dotsize parameter is a positive integer that determines the size of the
smallest output dot (in pixels) in rendered images.
A dotsize value of 1 or 2 produces the best rendered images. When the device
can faithfully display isolated black and white dots, use a dotsize value of 1.
When the device cannot faithfully display isolated black and white dots, use a
dotsize value of 2.
A larger dotsize value increases the speed at which images are rendered, but it
does so at the expense of image quality. A large dotsize value may be useful in
draft mode. A quality draft is produced by a smaller dotsize at a slower speed.
6.7 Setting Up DECimage for Special Effects
You can create individual DECimage setup modules for special effects, such as:
•
Contrast
•
Sharpness
•
Resolution
Table 6–1 provides the values to insert into your PostScript code.
Table 6–1 Setting Values to Change Picture Characteristics
To Change This...
To increase contrast
To sharpen an image
To soften an image
To make an image coarse
Set Punch1
Set Punch2
to...
to...
.1
.9
0
1
0
1
0
1
Set
Sharpness
Set Dotsize
to..
to...
2
1
3
1
.7
1
2
2
Enhancing Picture Quality 6–9
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