Is it possible to increase the number of pixels in a jpg?

I have a picture that I took with a Kodak digital camera that I would like to upload to a photo sharing site, but it must be at least 2200 pixels wide or tall at 72dpi, and it isn't that many. Is there anything that I can do about it? I have been using Kodak EasyShare software, if that matters. I really am clueless ;-)

This is the error message that I am getting:

"Sorry, the file you have submitted is too small. Submissions must be at least 2200 pixels wide or tall to be considered for publication. The file that you submitted is 320 x 258. Please try again with a bigger image."

If your picture is only 320 by 258, then your picture is going to look horrible when it is printed. Print quality is 300-360 dpi, so your picture would be less than one square inch. Even if you stripped it down to the barest 100 dpi that would look halfway decent if you didn't look too close, you'd still only get 3 inches.

I'm almost certain that this picture didn't come directly from your camera. Even a camera phone takes pictures bigger than that. Do you have the original, unaltered file from your camera?

There are tools you can do to increase the size of an image by guessing at the missing data, depending on what software you have, but it doesn't help THAT much. You simply can't create information that doesn't exist. If you do the Image Size method in photoshop, make sure you check Bicubic Interpolation.

That does not sound logical. At 72 dpi a picture that is 2200 pixel wide would be over 30 inches wide. You can do it by changing resolution with any photo editing software but I believe you are mistaken.

Yes,with ACDSee software (modify)

I think with photoshop. Of course the extra pixels will only be an extrapolation of the existing ones, but you will get the density you need. (no software in the world can change a bad picture to a good one!)

you can add pixels as you need,but what color they will contain?the computer may only give them a duplicate of the adjacent one,making the pic a little bit blur...
in photoshop open it,click "image" then "image size" and give it the size you want..

320 is about ~4"
2200 is about ~ 30"
so you can increase it, but its a bit much for what ever purpose,

if not in photoshop, try others...
http://www.snapfiles.com/Freeware/gmm/fw...
.. gimp or photobie