Blurry photos are often disappointing. Canon EOS Rebel T3 | Canon EF-S 18-55mm F3.5-5.6 IS II | F5.6 | 1/5 sec | ISO 2500 Photo: Mitchell Clark We've all been there: you're excited about an image you ...

Whether an image appears blurry or sharp depends on the distribution of contrast across different spatial scales. Smoothing the sharp transitions in an image by low-pass spatial filtering makes it ...