Quote:
Originally Posted by Xxphd
producing a BMP or PICT will reduce the size to about 50% or even less of that I guess
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No, it's almost the same size (26781040 respective 26780742 bytes in the example):
Code:
> convert page26.pnm page26.bmp # converts PNM to BMP (lossless)
> ls -l
-rw-r----- 1 anon anon 26781040 Jun 26 23:43 page26.pnm
-rw-r--r-- 1 anon anon 26780742 Aug 8 18:41 page26.bmp
As far as I know PNM has also an ASCII representation instead of using raw binary data. If this would be used you would be right.
PNM and BMP are almost the same formats, they store for every pixel the full information (e..g. 24 bits RGB value or 8 bit grey value).