Zipping up Jpeg files using Zip Manager...
I understand there is some software name Zip Manager which can actually zip up my original photo files under Jpeg format thus reducing the file size, and can be unzip any time back to the original file size. Any suggestions on which are the specify software? Or which sofeware does the job best? Any advise/suggestions? Thanks in advance..
#1. "RE: Zipping up Jpeg files using Zip Manager..." | In response to Reply # 0dwig Registered since 30th May 2004Wed 11-Jan-06 04:19 PM
There are a number of applications that can create the now standard ZIP archive originally created by PKWare for their PKZip application long ago in the MS-DOS days. On Windows, my long time favorite has been WinZip (http://www.winzip.com/).
Windows XP supports simple ZIP creation and accessing natively. You just right click in an Explorer windows and select New>Compressed Folder from the resulting menu. Drag you files into the folder to create a ZIP archive. The more advanced applications, like WinZip, add additional functionality that allows automated control of how the files are unZIPped, password protection, ... .
BTW, the amount of compression you get with ZIP archives varies with the type of file you are compressing. Many formats are already heavily compressed and don't compress much further. JPEG, PSD (when the application's compression option is on), FreeHand 10 & MX files, and some PDF files hardly compress at all. TXT, RTF, and TIFF, on the other hand, will compress to about 1/8th to 1/16th their original size.
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#2. "RE: Zipping up Jpeg files using Zip Manager..." | In response to Reply # 0BJNicholls Charter MemberWed 11-Jan-06 08:40 PM
You won't see signficant file reduction for jpegs packaged as zip files. I wouldn't bother.
TIFF and some other file formats can achieve substantial reduction by zipping them. However, if you simply save your tiffs using lossless LZW compression you'll get files that are 50% of the original size.
The only use I have for .zip packaging is to provide a corruption-resistant format for sending files. Zipping files provides error-correction that means the images won't be corrupted during email or FTP transfer.