Date sent: Sun, 09 Jun 2002 15:09:58 -0400 Send reply to: [EMAIL PROTECTED] From: "Johnny Johnson" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Subject: [filmscanners] Re: Archiving and when to sharpen (was:Color spaces for differentpurposes)
> At 01:20 PM 6/9/02 -0500, Laurie Solomon wrote: > > >Although I concur with all you have said, I have to wonder if the publicist > >and publisher are requesting jpeg files rather than lwz compressed TIFF > >files out of force of habit, lack of knowledgabout the ability to compress > >TIFFs using the lwz compression which is as good if not better than the JPG > >compression at levels 10-12, or a lack of any real concern over quality of > >the file they are getting. > > Hi Laurie, > > Is it not lzw compression instead of lwz? yes > In any case, does the amount of > reduction in the file size using lzw compression vary considerably with the > content? yes; if there are many pixels of same color, image will compress more. The reason I ask is that I just compared a scanned photograph of > 3591 X 5472 pixel size saved in several formats. The results were: > > TIFF 36,498 kb > TIFF with lwz compression 36, 523 kb > JPG @ Photoshop level 12 17,633 kb Wow, are you sure? The LZW TIFF was *larger*? That's unusual. Mac McDougald -- DOOGLE DIGITAL 500 Prestwick Ridge Way # 39 - Knoxville, TN 37919 [EMAIL PROTECTED] 865-540-1308 http://www.doogle.com ---------------------------------------------------------------------------------------- Unsubscribe by mail to [EMAIL PROTECTED], with 'unsubscribe filmscanners' or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or body