From time to time Esoterica, for fun, attempts to bring you useful hints, links and
suggestions. These came to my attention through e-mails and general life
experiences. Those shown below were recently received and deserve
to be shared. While
no attempt has been made to scientifically verify the
results, casual observation may seem to back up the
numbers, verify the conclusions or the obvious . . .
Watch Those JPEGs!
I
received this warning in the mail today. It is a simple explanation of
something I highlighted during an early class lecture: Don't work on JPEG
files and save them! Here is the story as presented to me:
JPEG
is a great format, ya know? They can take a huge 30 meg file and make it
look great at 3 meg - if only my diet worked so well :-)
However, there is a hidden danger behind all that digital dexterity. JPEGs
are a "lossy" compression scheme. What they do is "dump" unnecessary
information when they are created. The higher the compression rate, the more
unnecessary information they tend to find. Before you lose too much sleep
over that little fact, let's take a closer look.
First
off, a JPEG really does an incredible job at getting rid of information we
either can't see, or that's easy to re-create when it's opened.
For
instance, let's say you're hangin' out in Montana and happen to catch some
of that big sky they have with your digital camera. You end up with a photo
that's just chock full of blue pixels. Since most of these blue pixels are
exactly the same, JPEG compression dumps the look-alikes and recreates them
when the photo is reopened.
It's
not a perfect process though, and if you zoom in with your imaging program
you may notice that some areas seem "jaggy". (Hey, something had to give
with all that pixel dumping.) So here's the rule:
Avoid
re-saving JPEGs at all costs (OK, not "all costs". If someone with a gun is
demanding you re-save a JPEG, go ahead and do it - but only once! :-)
See,
each time you resave the photo (not open and close, but resave it)
you sacrifice some image quality on the alter of high compression. Every
time a JPEG is re-compressed, some of the "imperfect" information that was
created when the photo was previously compressed is made even more
"imperfect". Bottom line, the more you re-save a JPEG image, the more it's
going to deteriorate.
Here's
a sample:
Let' start with this eagle:

Here's a close-up of a wing from the original:

Now, after some repeated re-saving:

I know
what you're thinking - you have a gazillion JPEGS and now the idea of doing
a little retouching scares the you-know-what outta ya. Well, that was the
whole point :-) (kidding)
Actually, here's how you work with JPEGs - save them in another format.
Open
the JPEG you want to retouch in your imaging software, then Save As a
TIFF file. Since TIFFs don't lose info when they are saved (it's a
lossless format), you can edit, open, and save them all you want with no ill
effects. Go ahead, spend an afternoon doing it and you'll see I'm not just
makin' it up.
Sure,
you'll still have all of the "compression artifacts" from the original JPEG
file, but they aren't going to get any worse. To minimize the effect, be
sure you have your digital camera set to save the highest quality JPEG
possible.
Anyhow, once you're done with your retouching, keep the TIF as your
"original". Then if you need a smaller file, you can always re-save the TIF
as a JPEG and you're all set.
Sneaky
huh?
The
process of ordering pizza
ORDERING A PIZZA IN 2010 ...
This is funny, but the scary part is that it's probably not too far away
from being REALITY!!!
Want to know how to order a pizza in 2010?
Turn up the volume. . . AND Listen closely. Watch the pointer carefully!
Click this link and see how it will be:
http://aclu.org/pizza/images/screen.swf
Subject: Who am I ???
·
I was born in one
country, raised in
another. My father was
born in another country.
I was not his only
child. He fathered
several children with
numerous women.
·
I became very close to
my mother, as my father
showed no interest in
me. My mother died at an
early age from cancer.
·
Later in life, questions
arose over my real name.
·
My birth records were
sketchy and no one was
able to produce a
legitimate, reliable
birth certificate.
·
I grew up practicing one
faith but converted to
Christianity, as it was
widely accepted in my
country, but I practiced
non-traditional beliefs
& didn't follow
Christianity, except in
the public eye under
scrutiny.
·
I worked and lived among
lower-class people as a
young adult, disguising
myself as someone who
really cared about them.
·
That was before I
decided it was time to
get serious about my
life and I embarked on a
new career.
·
I wrote a book about my
struggles growing up. It
was clear to those who
read my memoirs that I
had difficulties
accepting that my father
abandoned me as a child.
·
I became active in local
politics in my 30's then
with help behind the
scenes, I literally
burst onto the scene as
a candidate for national
office in my 40s. They
said I had a golden
tongue and could talk
anyone into anything.
That reinforced my
conceit.
·
I had a virtually
non-existent resume,
little work history, and
no experience in leading
a single organization.
Yet I was a powerful
speaker and citizens
were drawn to me as
though I were a magnet
and they were small
roofing tacks.
·
I drew incredibly large
crowds during my public
appearances. This
bolstered my ego.
·
At first, my political
campaign focused on my
country's foreign policy
. . . I was very
critical of my country
in the last war and
seized every opportunity
to bash my country.
·
But what launched my
rise to national
prominence were my views
on the country's
economy. I pretended to
have a really good plan
on how we could do
better and every poor
person would be fed &
housed for free.
·
I knew which group was
responsible for getting
us into this mess. It
was the free market,
banks & corporations. I
decided to start making
citizens hate them and
if they were envious of
others who did well, the
plan was clinched tight.
·
I called mine "A
People's Campaign" and
that sounded good to all
people.
·
I was the surprise
candidate because I
emerged from outside the
traditional path of
politics & was able to
gain widespread popular
support.
·
I knew that, if I merely
offered the people
'hope' , together we
could change our country
and the world.
·
So, I started to make my
speeches sound like they
were on behalf of the
downtrodden, poor,
ignorant to include
"persecuted minorities"
like the Jews. My true
views were not widely
known & I needed to keep
them unknown, until
after I became my
nation's leader.
·
I had to carefully guard
reality, as anybody
could have easily found
out what I really
believed, if they had
simply read my writings
and examined those
people I associated
with.
·
I'm glad they didn't.
Then I became the most
powerful man in the
world. And the world
learned the truth.
*Who
am I? (SCROLL DOWN)