Sharpen

Function
Un-sharp masking is used for the sharpening filter. This process blurs the image slightly, takes the difference between the blurred result and the input image, and adds that back over the input image. High values of x and yPixels (for example, greater than 3 percent of the image size) return undesirable results. You can also use the sharpen filter in the Convolve function, but ringing may result.

Parameters
Type
Defaults
Function
percent
float
 20 The amount of mixing between the sharpened and the original image. 100 means none of the original image is present.
x/yPixels
float
 3,xPixels

The amount of sharpening as described in pixels.
channels
string
 "rgba" Which channels Shake should sharpen. Any or all of rgba. Default is "rgba"


Synopsis

image Sharpen( image, 
  float percent,
  float xPixels, 
  float yPixels,
  const char * channels 
 );


Script

image = Sharpen( image, percent, xPixels, yPixels, "channels" );


Command Line

shake -sharpen percent xPixels yPixels