----- 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.
William Robb
