What Is Unsharp Masking and How Is It Used When Editing Photos?

Unsharp masking is a techniques used when editing photographs to remove blurriness from an image. The name may initially appear confusing because it would appear to suggest the removal of sharpness, but is derived from the fact that the technique uses a blurred or ‘unsharp’ negative of an image as a mask to increase sharpness. the technique can be traced back to 1930’s Germany where the process involved the creation of a physical second negative of an image. The advent of digital photography and powerful image editing software however now means that unsharp masking can now be completed digitally.