Processing Test with the PGraphics

To simplify the use of a dynamic mask with image, I try to use the PGraphics class as an off screen buffer to store the image for a subsequent mask operation. The foreground image is the live video input from the webcam. The mouse drag operation will draw a dynamic mask to reveal the webcam image. It makes use of the fact that the PGraphics class is a subclass of PImage. The mask function can directly take the PGraphics instance as input. Here is a sample screen shot.

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Processing Performance Test 1

I try to compare various methods to handle mainly image-based computer graphics in the Processing environment and publish the results for developers’ reference. The first one is a very straightforward test by comparing two ways to modify all pixels in a single PImage object instance.

The first way is nested loops for x and y dimensions and the second way is to traverse the whole pixels array in one linear loop.
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