Processing: Creative Coding and Computational Art

adius is set high, the blurring can be severe. For example, here’s a very blurry image of my
dog Heidi (please note that this sketch can take some time to render—and of course, no
harm came to Heidi during the blurring process):
// Severe BLUR Filter
// image should be 600 x 400 pixels
size(600, 400);
background(255);
PImage img = loadImage("heidi.jpg");
image(img, 0, 0);
filter(BLUR, 10);
Figure 10-42. Severe BLUR Filter sketch
One final word of caution about the BLUR argument: it takes progressively more time to
render as you increase the radius argument, and no exception (compiler error) is thrown
for ridiculously large numbers, so be careful.
The final filter mode is OPAQUE, which I won’t bother covering as it simply ensures that the
alpha component of each of the pixels is at 100 percent.
blend()
Processing’s blend() function, similarly to filter(), is chock-full of features. One point of
potential confusion to beginning coders (as well as some more experienced folks, including
myself at one point) is that there are two blend() commands within Processing. One
lives as a PImage method and the other as a display window function; both also work
similarly.
COLOR AND IMAGING
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