How do i convert a jpeg image, created using photoshop, into a high resolution image ready for printing?

Question

The image is kinda like an avatar, only much much bigger.

thanx.

Answer 1

If you still have the raw files(.psd or esle), open it select image>size and change the resolution(600dpi or so would be good)and the size of the picture.The file may be very heavy
If your project includes a picture from a camera, you'll have to take the shot again and set your camera to a high resolution.

Answer 2

A JPEG image is already printable. However, if the resolution is not high enough for a good quality print, there is no conversion you can do to improve the quality of a low res image.