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  Reference for Processing (BETA) version 91+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.  
Name  

filter()

   
Examples  
PImage b; 
b = loadImage("topanga.jpg"); 
image(b, 0, 0); 
filter(THRESHOLD); 
PImage b; 
b = loadImage("topanga.jpg"); 
image(b, 0, 0); 
filter(GRAY); 
PImage b; 
b = loadImage("topanga.jpg"); 
image(b, 0, 0); 
filter(INVERT); 
save("filter_invert.tif"); 
PImage b; 
b = loadImage("topanga.jpg"); 
image(b, 0, 0); 
filter(GRAY); 
filter(POSTERIZE, 4); 
PImage b; 
b = loadImage("topanga.jpg"); 
image(b, 0, 0); 
filter(BLUR, 6); 
Description   Filters the display window as defined by one of the following modes:

THRESHOLD - converts the image to black and white pixels depending if they are above or below the threshold defined by the level parameter. The level must be between 0.0 (black) and 1.0(white). If no level is specified, 0.5 is used.

GRAY - converts any colors in the image to grayscale equivalents

INVERT - sets each pixel to its inverse value

POSTERIZE - limits each channel of the image to the number of colors specified as the level parameter

BLUR - executes a Guassian blur with the level parameter specifying the extent of the blurring. If no level parameter is used, the blur is equivalent to Guassian blur of radius 1.

OPAQUE - sets the alpha channel to entirely opaque
   
Syntax  
filter(MODE)
filter(MODE, level)
   
Parameters  
MODE   Either THRESHOLD, GRAY, INVERT, POSTERIZE, BLUR, or OPAQUE

level   int or float: defines the quality of the filter

   
Returns   None
   
Usage   Web & Application
   
Related   blend()
 
 






   
 
Updated: Fri Jul 15 16:35:39 PDT 2005
 
 








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