How much can it increase image size without loss quality?

[alex80]

How much can it increase image size without loss quality? Image resolution is 300 dpi.

[Daria]

I guess it depends on the program you are using, raster vs. vector, etc.

I personally don't know much (yet) about it, but here http://hotwired.lycos.com/webmonkey/design/graphics/
is one of good sources on the subj.

[KevGymnast]

If you are using vector then (in theory) you should be able to increase the size infinitly with little to zero pixelation. this is because instead of using pixels to make up the image the computer uses a mathmatical ratio of pixels to screen space to make up the image, so the math is always there and the ratio is just re-done everytime the image is enlarged.
now if you are useing bitmap programs (i.e MS paint, Photoshop, Paint shop pro, ect) you can only increase the size a little bit. unless you get the photoshop plugg-in Genuine Fractals, by Lizard Tech ( http://www.lizardtech.com ). this takes bitmap images and makes a mathmatical ratio for them. that way you can increase an image GREATLY with nearly zero pixelation.

[Bullschmidt]

How much can it increase image size without loss quality?

Answer: 0

[havik]

If you had photoshop (I've done this in 6 and 7), then it'd be a simple matter of increasing the images size (although with certain image types there is a limit then quality will degrade).

Havik