unsharp

un- +‎ sharp

unsharp (comparative more unsharp, superlative most unsharp)

1. Not sharp, as:
   1. (imaging, graphics) out of focus; blurry.
   2. (tools) dulled or intentionally blunt.

• nonsharp

• sharp
• crisp

• unsharpness

unsharp (third-person singular simple present unsharps, present participle unsharping, simple past and past participle unsharped)

1. (transitive, imaging, graphics) To sharpen (an image) by creating a blurred ("unsharp") negative as a mask, and then combining that mask with the original.

• Not to be confused with unsharpen.