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Re: filmscanners: JPEGs, TIFF's and suchlike

In a message dated 2/6/2001 4:40:24 AM EST, markthom@camtech.net.au writes:

> I've just tried to do some sort of meaningful comparison of originals
>  versus JPG's at 100% quality, and the results are here - no apologies for a
>  hastily knocked up, ugly, web-page ;( :
>  http://www.adelaide.net.au/markthom/compare.htm

A more valid test is to compress the whole .tif file down so that
the resultant size is 1/7 of the uncompressed .tif file.

Then convert the jpeg file back to tiff (or png) and crop that
file.  It isn't as valid of a test to be compressing 80x50
files - a lot of the file size in this file is jpeg overhead and the block
sizes in the vertical direction aren't a factor of 8.

That said, it sure is hard to see any difference between the
images you posted on the web site.

Ed Hamrick


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