Blur images quickly.
Uses a recursive moving average filter applied multiple times to approximate gaussian blur. As opposed to convolution-based blur filters, fastblur is just as fast for any blur size. Fastblur converts the image to a linear color space before blurring, which gives natural looking blur.
The peppers test image
The peppers test image, blurred using fastblur.
fastblur -p 4 -z 49 peppers.png peppers_blurred.png