On Dec 14, 2009, at 12:59 PM, Philip Pemberton wrote:
I'd rather not use JPEG for pages that contain
text.
[dave stands up and cheers]
I tried to think of a more verbose response, but really, I can say
it in three letters:
:-)
:-)
<off-topic rant>
I find it incredibly irritating when people use JPEG for things
that it's not suited for. It irritates me because it points to the
bigger problem of people running full steam ahead and using
technologies that they know NOTHING about, and they're just fine with
that. Then they try to do things like present schematic diagrams
(Yes, schematics! Even supposedly "technical" people do this!) in
JPEG, and wonder why they get lots of unsightly artifacts around
lines and sharp color transitions.
Recently, I heard someone complaining about those artifacts after
exporting an AutoCAD drawing to JPEG. He said "oh, they always do
that, I think my computer has a virus or something." Moron. I
wanted to hit him in the head with a shovel.
So, folks: JPEG is for continuous-tone images, like natural scenes
and photographs. It DOES NOT WORK even remotely well for
"artificial" images. Use PNG or GIF for those. You'll get better
compression ratios and MUCH better image quality. This isn't just an
anal-retentive academic theoretical difference...we're talking about
images that look good versus images that look like crap.
</off-topic rant>
-Dave
--
Dave McGuire
Port Charlotte, FL