DPI

I'm looking at this photo contest of your sleeping pet. It specifies
that all photos should be no more than 72 DPI. Of course, I say "what
does this even mean without specifying a print size?" Mrs. Cynicor says
"look, just follow their instructions."

AAAAAAAAAAAAAAAAAGH! So I wrote to them and asked whether it was 72 DPI
for a 5x7 photo or a 20x30 photo or what.

(http://www.sleepfoundation.org/site/...idelines .htm)

On Wed, 18 Jul 2007 22:03:09 -0400, Cynicor wrote:

I'm looking at this photo contest of your sleeping pet. It specifies
that all photos should be no more than 72 DPI. Of course, I say "what
does this even mean without specifying a print size?" Mrs. Cynicor says
"look, just follow their instructions."

AAAAAAAAAAAAAAAAAGH! So I wrote to them and asked
whether it was 72 DPI for a 5x7 photo or a 20x30 photo or what.

BTW, I just downloaded two of the contest entries. The first
("Mabel"), was set to 100 DPI according to Irfanview. The second
("Jesse James") had no value specified for DPI. Its actual filename
is "jessejames_riona_original_thumb_400.jpg", so you can get an idea
of what you're dealing with here. Somehow I don't think that these
entries were disqualified for not complying with the rules.

On Wed, 18 Jul 2007 22:03:09 -0400, Cynicor wrote:

I'm looking at this photo contest of your sleeping pet. It specifies
that all photos should be no more than 72 DPI. Of course, I say "what
does this even mean without specifying a print size?" Mrs. Cynicor says
"look, just follow their instructions."

AAAAAAAAAAAAAAAAAGH! So I wrote to them and asked
whether it was 72 DPI for a 5x7 photo or a 20x30 photo or what.

They won't reply. Yours wasn't the first such question by far,
and so by now whoever wrote the contest rules is unavailable to
answer your question. He has been put to sleep.

Cynicor wrote:
I'm looking at this photo contest of your sleeping pet. It specifies
that all photos should be no more than 72 DPI. Of course, I say "what
does this even mean without specifying a print size?" Mrs. Cynicor says
"look, just follow their instructions."

AAAAAAAAAAAAAAAAAGH! So I wrote to them and asked whether it was 72 DPI
for a 5x7 photo or a 20x30 photo or what.

(http://www.sleepfoundation.org/site/...idelines .htm)

The Rule maker obviously doesn't know what he/she is talking about.
But a 640 x480 pixel image (a common minimum size for most digicams) in
uncompressed BMP format would have a file size of 0.92 MB.
I would send them a 640 X 480 pixel image at 72 ppi in highest quality
..jpeg format. It will have a file size less than 1MB.
Bob Williams

On Wed, 18 Jul 2007 22:03:09 -0400, Cynicor wrote:

I'm looking at this photo contest of your sleeping pet. It specifies
that all photos should be no more than 72 DPI. Of course, I say "what
does this even mean without specifying a print size?" Mrs. Cynicor says
"look, just follow their instructions."

AAAAAAAAAAAAAAAAAGH! So I wrote to them and asked whether it was 72 DPI
for a 5x7 photo or a 20x30 photo or what.

(http://www.sleepfoundation.org/site/...idelines .htm)

So, send them your 8mp image set to 72 dpi.

And lo, Jim Townsend emerged from the ether
and spake thus:
Cynicor wrote:

I'm looking at this photo contest of your sleeping pet. It specifies
that all photos should be no more than 72 DPI. Of course, I say "what
does this even mean without specifying a print size?" Mrs. Cynicor says
"look, just follow their instructions."

AAAAAAAAAAAAAAAAAGH! So I wrote to them and asked whether it was 72 DPI
for a 5x7 photo or a 20x30 photo or what.

They obviously want to publish the submissions on their web page. Someone
told them that images MUST be 72 DPI for the web, so they're specifying this.

Of course 72 DPI has nothing to do with web images displayed on a monitor.

They can be any DPI. It's only the length and width in pixels that's important.
But so many people can seem to get their heads around this.

In a case like this, I'd just send them a 800 X 600 photo and set the DPI
to 72 to make them happy

(http://www.sleepfoundation.org/site/...idelines .htm)

There is a great deal of misunderstanding about DPI. You can
understand DPI (and "resolution" in general) much more clearly if you
realize that it is almost exactly the same as "speed."

http://www.singleservingphoto.com/20...lculating-dpi/

Everyone seems to like that metaphor, so there it is.

--
Aaron
http://www.fisheyegallery.com
http://www.singleservingphoto.com