After the "Save-as" command in PS, you should get the attached screen giving you the option of LZW compression. Maris ----- Original Message ----- From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, August 07, 2001 4:44 PM Subject: Re: filmscanners: (anti)compression? Well, my Photoshop 6.0 (on a PC) doesn't offer any compressed TIFF file formats. When doing a "Save-as" for a 48-bit file, I was given three choices: TIFF(*.TIF), Ras(*.RAW), and Photoshop(*.PSD,*.PDD). When saving a 24-bit file, I have many more choices including GIF, JPEG, etc., but nothing that implies a compressed TIFF. In a message dated 8/7/2001 2:29:44 PM Pacific Daylight Time, [EMAIL PROTECTED] writes: If you re-save a file PS will automatically save in the format that was opened. If you use "save as" and select TIFF you get the choice of compression (none,LZW,JPEG,ZIP). Of these JPEG is lossy. None is the standard TIFF. The other three are legal variations that may not be supported by software that the person reading the file is using. Therefore unless otherwise told use TIFF (no compression) or normal JPEG (not the TIFF variety) if you intend someone else to read it. Steve ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, August 07, 2001 9:45 PM Subject: Re: filmscanners: (anti)compression? > This is probably a stupid question, but how do you do an LZW compression on a > TIFF file? Photoshop doesn't offer TIFF compression as an option, as far as > I know. Is there freeware available? Since a lot of my work involves models > against a solid colored background, it seems like lossless compression would > save me a lot of storage space. I assume you have to run a stand alone > decompression program to get the original file back. > > In a message dated 8/6/2001 7:03:48 PM Pacific Daylight Time, > [EMAIL PROTECTED] writes: > > > > That is because LZW works by substituting colors with variables. If you have > > an image with very few colors and shades, LZW will compact it to a tiny > > fraction of its original self. On the other hand, a very diverse image with > > lots of colors and shades will require tons of substitutions, and the size > > becomes larger. > > > > >
<<attachment: LZW screen.jpg>>