Re: Posting ascii art on the web

In article <slr...@banach.math.fu-berlin.de>, Sven Guckes
<guc...@banach.math.fu-berlin.de> writes
>edi...@cc.curtin.edu.au (edi...@cc.curtin.edu.au):
>> And just a tip for anyone using gifs : the less
>> colours you use, the better the compression
>> (or in english, the smaller the gif file will be ;)
>
>This is not always true.

Sometimes... :)

>You should not statements about the compression rate of data
>unless you know the data and the compression technique.
>I hope noone still thinks that applying a compression
>technique on data will always yield less data.

However, he is right.  If we can imagine a 2 colour GIF file (black &
White), we instantly save 700 bytes on the global colour table, and then
the image descriptor block would be very small as it is simply encoding
long stretches of black or white.  Admittadly, lots of interchanging
between black and white with obscure lengths will reduce compression,
but it will still be less than a GIF with a 3 x 256 byte colour table.

Any image which has less colours will be smaller than it's counterpart,
for the simple reason it is using less bits per pixel than a colour one.
Monochrome is simply 1 bit per pixel, and then 2,4... etc for colours.
Considering the ASCII Art posted in to this group is monochrome, I can
see a considerable size difference in the resulting GIF file.

Soz, just my 2p :)

-- 

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