How can I resize an image with the following measurements:
Pixel dimensions:
Width: 792 pixels
Height: 528 pixels
Document Size:
Width: 11 inches
Height: 7.333 inches
Resolution: 72 pixels/inch

...to an image of:
Pixel dimensions:
Width: 1500 pixels
Height: 1000 pixels
Document Size:
Width: 20.833 inches
Height: 13.889 inches
Resolution: 72 pixels/inch

without losing quality? Or is there any way to "clear" up the image after resizing?