[Doctah]

I have an image that's 240x240 but need it to be 512x512. I'm wondering if I could resize it but not lose the quality it has. It's a very basic black and white image.

[FerTheWin]

Post the image? Depending on the current quality of it might be able to be upscaled without much quality loss.

[Doctah]

[img]http://images1.wikia.nocookie.net/__cb20110807195534/gtawiki/images/1/18/FIB_logo.png[/img]

It's OK quality, I'd say so.

[Pentatonic]

Nop, It won't look good if you increase the w&h.

[gdaddyb]

I found an image similar to it and did some resizing. You could edit it to your liking.

[Raitz]

You could try sharpening it. Resizing is shrinking or enlarging pixels, so there's no way to do it without loosing quality.

[Vector Master]

if its something like this, a b&w high contrast image, you can try to live trace it using illustrator.
But, some sharpness or corners might be lost, like the text is unreadable so i just removed them.
I can recreate this but I just don't have the time at the moment :\

[Ryuuji Takasu]

easiest way would be vectoring it yourself/hire some one.
vector's won't lose quality if scaled.

[SnowCom]

Merge all your layers, hold CTRL and click the image on the left of the layer name, edit, copy merged, new, type in your dimensions, Edit paste, CTRL T, make it bigger, save for web and device then that's it!, hope I helped.

[BlockaSmash]

I'm pretty sure if you turn it into a smart object and scale it proportionately you can retain some of the quality. Usually only works with small scaling though.