On Apr 23, 2006, at 8:48 PM, William Robb wrote:
----- Original Message ----- From: "Godfrey DiGiorgi"
Subject: Re: Saving for Web in PE4: update
My experience with save for web is that it gives a file roughly
25% or more smaller, and has no effect on viewability of the image.
I just finished a series of tests. My script using Photoshop's
own JPEG algorithm and will all metadata intact produced an
excellent image direct from the full resolution, 16bit PSD
example file that was 100K in final size.
Save for Web would not accept that large an original file to
begin with, which meant that I had to do all the work of
resizing, reduction to 8bit, etc before using it. Then it
produced a file, sans ICC and metadata, that was 15K smaller (85K
total). The quality (set to "65" as Aaron suggested comparable to
to Photoshop's 8) had much more visible artifacts than the
Photoshop "6" setting. I then added the ICC profile and metadata
and the file grew by 4K.
Personally, I'll not use Save for Web. I prefer to have the
appropriate metadata in my JPEG files on the web, as well as the
ICC. 15K for that, plus better rendering, is not too much.
I just ran the same test on a file. The file was one that I ran an
action on to resize it to 500x750 and convert it to sRGB.
Saving at the small end of Maximum (8) on the jpeg slider gave me a
110k file.
Saving for web as a High Quality Jpeg gave me a 38k file.
There was absolutely no visual difference in either a web browser
or Irfanview.
To get to a 110k file size with the full resolution (7mp off my
Optio) file required 0 on the quality scale, and a file that
reopened as crap with metadata.
I didn't bother to try to save the full res file as a save for web,
since it isn't designed to be used for full res files.
Copyright data is as well saved as a © mark on the image as
metadata in the image.
My test was on a *ist DS file. Was your Optio file a RAW original or
a JPEG original?
Godfrey
