Brother INTELLIFAX 600 - Manual (Page 74)

SENDING FAXES
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PHOTO
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PHOTO
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FINE
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PHOTO
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S.FINE
STANDARD resolution can be used for most typewritten text.
FINE resolution should be used for small text such as printed
text.
SUPERFINE resolution should be used for very small text and
artwork.
Photo Mode
Note that SUPERFINE resolution is a proprietary mode that
can only be used between Brother fax machines. If you try to
send a fax in SUPERFINE resolution to a non-Brother fax
machine, it will be sent in FINE resolution.
Why bother with different resolution modes, at all? Why not
simply send all faxes in superfine mode? The answer is that it
takes roughly twice as long to send a fax in fine mode as in
normal mode, and four times as long in superfine mode.
ORIGINAL FAX
BLACK
50% GRAY
WHITE
When the IntelliFAX600/650M scans a document, it breaks
each line down into a large number of dots called pixels,
(pixels stands for picture elements). The printer in the
receiving fax can only print each pixel as black or white, it
cannot pnnt shades of gray.
This can be a problem when transmitting pictures with shades
of gray such as photographs, since all areas of the picture
darker than a certain shade will come out black, and all lighter
areas will come out white.
To get around this problem the lntelliFAX600/650M uses a
technique similar to that used to print photographs in
newspapers, simulating shades of gray with combinations of
dots. Blocks of 16 pixels are used. Some of these will be black
and some white, depending on the shade of gray being
simulated.
Note that photo mode should only be used for those documents
that require it, because:-
- A fax sent in photo mode takes as long as one sent in superfine
mode.
- The scanning method used for photo mode tends to make the
edges of text look ragged.
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