A Survey of Blur Detection and Sharpness Assessment Methods

Blurring is almost an omnipresent effect on natural images. The main causes of blurring in images include: (a) the existence of objects at different depths within the scene which is known as defocus blur; (b) blurring due to motion either of objects in the scene or the imaging device; and (c) blurring due to atmospheric turbulence.

Automatic estimation of spatially varying sharpness/blurriness has several applications including depth estimation, image quality assessment, information retrie...