When I first saw the Scale2x, scale3x AS3 I am impressed. The algorithm is from scale2x sourceforge project and the AS3 port is coded as a class that is very easy to reuse. Surely the AS3 port author nicoptere can make a PB port too as you may find out many PB cool stuff over his blog, but my pixel bending desire force me to do it myself :P
Here below the video shows my demo. I get a camera capture stream and used Posterizer which is downloaded from Pixel Bender Exchange to convert the image to 4-color-only, and than use the scale2x filter to enlarge the low resolution capture. The top-left corner thumbnail-like image is actually the original 1:1 input(160*120).
It is quite interesting to see for scale2x, PB’s version nearly doubles the performance of AS3’s. But for scale3x, there is not much different between PB and AS3. I think it is because scale3x has too many if-else which PB is not strong at.
BTW, I discovered a bug in PB while coding this. The bug make my code much longer as I work-a-round it… I reported it to the PB forum.
Demo app’s Flex project with Pixel Bender source (The shorter but buggy versions are included too.)