The phrase "fuzzy images" means pictures or photographs that are not very clear or sharp. They may be blurry or out of focus, making it difficult to see the details. Full definition
It didn't matter that the early ultrasound machines yielded fuzzy images, however, or that they only proved helpful in a small proportion of pregnancies. (scientificamerican.com)
A 2012 study funded by the U.S. Department of Defense indicated tDCS may heighten vigilance, making participants twice as fast at spotting bombs, snipers and other threats in fuzzy images. (scientificamerican.com)
But the powerful electron beams can incinerate the material as they pass through it, weakening the beam and producing fuzzy images. (sciencenews.org)