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Tips on Using the Scanner
Transparent document
Transparent material may not be scanned properly because the
ES-300C scanner scans an image by reflecting light off the document
surface. In the case of overhead projector transparencies, if you can
clearly recognize the image on a transparency by placing it on an
opaque surface, it can be scanned. Film negatives or 35 mm slides
cannot be scanned because the images on them are too dark and too
small for the scanner to recognize.
Thin materials
When the document paper is too thin, the image on the reverse side
of the page or on the next sheet of paper may appear as a ghost-like
image superimposing the desired image. If this “bleed” occurs,
photocopy the image on a heavier bond paper and rescan the image.
Minimizing
the
Moiré Pattern
A moiré pattern is the repeating interference pattern that appears
overlapping a scanned image. This usually occurs with printed
material processed with screens and when the pitch of the screen
interferes with that of the scanner’s sensor. Moiré does not occur
with ordinary photographs because they do not cause interference.
Although a moiré pattern does not occur often, once it occurs it is
difficult to remove completely. To minimize the effect of the moiré
pattern, you may try the following:
l
Place a transparent plastic sheet between the document and the
document table so that the document is slightly out of focus.
l
Place the document slightly angled or move its position slightly.
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Consult your software manual for other solutions.
Using the Scanner 2-19