This is the sharpest "whole Jupiter" photo ever taken from Earth. It was snapped with a telescope using special adaptive optics to reduce fuzz. From National Geographic:
Captured using a new computer-assisted process and a 27-foot (8.2-meter) telescope in Chile, the result is sharp enough to show features as small as 180 miles (300 kilometers) across...New Jupiter Image: Sharpest View Ever From Earth
Adaptive optics, (UC Berkeley/SETI Institute astronomer Franck) Marchis said, adjusts for distortions caused by the Earth's atmosphere, "providing images as if the telescope was in space."
UPDATE: In the comments, DAEMON kindly posted a link to the full res image!