The quality of any digital image, whether printed or displayed on a screen, depends in part on its resolution—the number of pixels used to create the image. More and smaller pixels adds detail and sharpens edges.
- Optical Resolution is an absolute number that the camera’s image sensor can physically record.
- Interpolated Resolution adds pixels to the image using complex software
algorithms to determine what color they should be. It is important to note that interpolation doesn’t add any new information to the image
Camera makers often specify the resolution as QVGA (320 x 240), VGA (640 x 480),
SVGA (800 x 600), XGA (1024 x 768) or UXGA (1600 x 1200).