7zip will produce quite better result as will RAR and ACE formats (but7zip still the best and it is free). Of course 7zip format is not a very common standard unfortunately.
2006/9/10, Godfrey DiGiorgi <[EMAIL PROTECTED]>: > I'm not sure what this debate is all about but I did a very quick > test using Photoshop CS2 and the standard UNIX zip implementation in > Mac OS X. > > - Took a typical JPEG image file directly out of the Fuji F30. > - Opened in Photoshop and Save As to a TIFF file, uncompressed. > - Zipped the Tiff file. > - Save As the same file to a LZW compressed TIFF. > - Zipped the TIFFz file. > - Save As the same file to a Zip compressed TIFF. > - Zipped the TIFFzip file. > > Here are the results: > (bytes - file name) > > tiff > 18281440 DSCF0235.tif > 11001877 DSCF0235.tif.zip > > tiff with LZ compression > 8420252 DSCF0235z.tif > 8371603 DSCF0235z.tif.zip > > tiff with zip compression > 7687904 DSCF0235zip.tif > 7666264 DSCF0235zip.tif.zip > > In all cases, the TIFF with compression produces a smaller file size, > and in all cases doing compression with zip afterwards reduces the > file size by a small amount further. Zip compression of the > uncompressed tiff runs about 40%, zip compression of the compressed > formats runs less than 1%. > > Godfrey > > > > On Sep 10, 2006, at 9:19 AM, Shel Belinkoff wrote: > > > It hasn't worked like that for me and for numerous other people. > > Zipping a > > TIFF has always resulted in a file that was the same size or slightly > > larger than the original. > > > >> From: Jan van Wijk > > > >> If you save an inage as UNCOMPRESSED TIFF from Photoshop, > >> e regular ZIP will be able to compress it down, taking perhaps upto > >> 40% of the size off (heavily depending on image content/detail :-) > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > -- Thibault Massart aka Thibouille ---------------------- *ist-D,Z1,SuperA,KX,MX, P30t and KR-10x ;) ... -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
