Processing 2: Creative Programming Cookbook by unknow

Author:unknow
Language: eng
Format: epub
Publisher: Packt Publishing

I've used the filter() function with the POSTERIZE mode, in this example. The result will look like the following screenshot:

How it works...

The filter() function usually takes one parameter to change the appearance of what is shown on the screen. Some modes also need a second parameter. The following are modes you can use with the filter() function:

BLUR: This mode applies a Gaussian blur filter to the pixels on the screen. The second parameter sets the radius of the blur. If you use this mode without specifying a second parameter, the radius of the blur will be 1 pixel. Note that your sketch will slow down, if you use a big blur radius.

DILATE: This mode increases the light areas of the image. It is handy if you want less contrast.

ERODE: This one does the opposite of what the DILATE mode does—it decreases the light areas of the image. You can use this one if you want to add more contrast to the image.

GRAY: This mode converts the video to grayscale.

INVERT: This mode converts the image to its negative.

OPAQUE: This mode converts the alpha channel of the image to opaque pixels.

POSTERIZE: This mode reduces the number of colors in the image. The second parameter sets the number of colors.

THRESHOLD: This mode converts the image to black and white pixels.

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