More DPI/ PPI And file size /quality Confusion
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22-02-11, 03:01 PM
Join Date: Jul 2009
Originally Posted by
The normal wisdom is that the more you open and resave a Jpeg file the more information that is lost. So, if you were to do this twenty times the smaller the file would become, as recompression discards more informatiom.
I think you should amend your post slightly OldBoy so that it reads.....
'the more times you open,
and resave a Jpeg under the
same file name
the more information that is lost'
. The process of simply opening a jpeg file and viewing it followed by closing it does not result in information being lost due to recompression. If this were the case most of us would have lost most of our images by now through constant viewing.
@jprippin - the process of compression of jpeg files involves the preservation of luminosity data at the expense of colour data.
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