Re: Reducing File Size with Photoshop

[Peter J. Alling]

The jpeg doesn't unpack itself, the viewer software does that, but more 
or less.  That's why if you zip
an jpeg file the resulting zip file is bigger than the jpeg.

Jens Bladt wrote:
So, a Jpeg is like a zip file, packing itself when saved, unpacking when
opended?
Jens Bladt
mailto:[EMAIL PROTECTED]
http://hjem.get2net.dk/bladt
-----Oprindelig meddelelse-----
Fra: Don Sanderson [mailto:[EMAIL PROTECTED]
Sendt: 13. november 2004 11:40
Til: [EMAIL PROTECTED]
Emne: RE: Reducing File Size with Photoshop
Are you referring to a .JPG file?
If so it has to be uncompressed for display/editing.
It is then recompressed when saved as a file again.
A .tif is the same if compression is used.
Don
 

-----Original Message-----
From: Jens Bladt [mailto:[EMAIL PROTECTED]
Sent: Saturday, November 13, 2004 4:33 AM
To: [EMAIL PROTECTED]
Subject: RE: Reducing File Size with Photoshop
Can anyone explain:
Why is the file size of an *ist D image say 3.936 MB in the Path
Finder, and
17,3 MB when opened in PS?

Jens Bladt
mailto:[EMAIL PROTECTED]
http://hjem.get2net.dk/bladt
-----Oprindelig meddelelse-----
Fra: Shel Belinkoff [mailto:[EMAIL PROTECTED]
Sendt: 13. november 2004 10:06
Til: [EMAIL PROTECTED]
Emne: RE: Reducing File Size with Photoshop
What's this "New Image data?" I couldn't find it in any of the menus or in
the help area.
Shel
   

[Original Message]
From: Jens Bladt <[EMAIL PROTECTED]>
     

That's right Shel. Provided you have chosen "New Image Data" in
     

PS, which
   

makes the computer calculate new pixels to put in between the original
pixels
     


   



 


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