A sharp knife is safer, faster, and far more satisfying to use—but only if you maintain it properly. After testing electric and manual knife sharpeners on everything from chef’s knives to pocket ...

A disturbing viral video shows a man brutally attacking an elderly woman at the King County Courthouse in downtown Seattle earlier this month, leaving her permanently blinded in one eye. Viral Video ...

Abstract: A family of matrix filters are introduced through approximations to directional digital derivatives. Images can be sharpened by combining all the eight directional filtered images together.