Photshop dpi question

[Sammii]

Simple question (I hope).

I have created an image and need to increase the number of dpi - I'm not sure if this is possible.

Is there a way to change the number of dpi an image has (up and down)?

If there is how do I do it in Adobe Photoshop?

Cheers guys.

[mickhawkes]

Yes,
drop down "Image" and click Image size

[Sammii]

Originally Posted by mickhawkes

Yes,
drop down "Image" and click Image size

Thanks Mick. I am only get the option for pixels per inch, does anyone know how this equates to DPI or isit just the same. Is a dot the same as a pixel (now you guys see how green I am).

HANG THE LIDDITE BITCH !!!

[flashwiz]

Although depending on what DPI you want to make you will start to lose quality if its much more than a third of the original as photoshop will add pixels... its called interpolation... but thats only if your resampling the image...

[Sammii]

Oops! I put 3000 ppi instead of 300 now I am waiting to get photoshop back - should I read War and Peace or paint the Forth Bridge with a toothbrush while I am waiting?

[Cwilk]

Interpolation is never great on an image because it's the equivolent of taking a piece of silly putty ... putting an image on it, and then stretching it out. It loses image quality and the silly putty (or in this case Photoshop) doesn't know what information went there. You should always try to make sure that your project is 100% of the 300 DPI size or whatever DPI it should be.

On the other hand, there's a great software called Genuine Fractals and it's the only software I've found that actually works to increase the DPI on a photo. It doesn't do miracles, but it can take a medium sized pic and increase it's size. We use it all the time for cover shots.

[Toon]

Great advice and good software advice link here for anyone wanting further info or to purchase.

[Cwilk]

Don't forget to keep in mind that GF won't take a small 72 DPI pic (1"x1") and make it a 300 DPI 2x2 or even larger. It takes a medium size pic at a fairly decent resolution and makes it bigger. Hope this makes sense.