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of course, something can be done. It requires, however, some planning
and possibly some compromizing.
The very first thing which has to be known is the resolution of the
intended output device.
When you know this value, open the screenshot in Photoshop and adjust
the resolution of the screenshot to a number which divides without
remainder (for example, output resolution is 1200 dpi, you set the
resolution of your screenshot to 150 dpi). This is for greyscale
screenshots.
Then you place the screenshot in your document again. NOTE that you
MUST NOT scale the screenshot in the page layout program. Just place
it and that's it. When you print, all your moirés are gone (because
in our example, your printer will have a cell of 8x8 pixels to
display one pixel from the screenshot.
If you still have problems, you could do the color reduction
yourself. In this case, go back to photoshop and create a B/W image
with the printer resolution and the desired size (in mm or inch).
Then place this one. If you don't do any scaling, this now really
should get rid of the moirés. When you do the resolution adjustment,
be aware of the hairline issue; single pixel wide lines may or may
not be properly printed (however, this should be not such a big deal
anyway, because your original image will have a way lower resolution
anyway, and in the conversion process, a pixel from the screenshot
will turn into a blob of pixels.
Hope, this can help.
Max Wyss
PRODOK Engineering
Low Paper workflows, Smart documents, PDF forms
CH-8906 Bonstetten, Switzerland
On my most recent project, all of my scroll bars had that annoying
moire effect. I complained to my supervisor, but he said there was
nothing that could be done, but I suspect otherwise.
Any ideas? This manual is to be printed in black and white (or 256
shades of gray). They looked fine on the screen, but when printed ...
:o\
