April 24th, 2009 | Published in Uncategorized
I’ve put my bilateral blur filter on Pixel Bender Exchange and it is selected as staff picks!
Go and download it from the page: Bilateral Blur Filter for Flash on Pixel Bender Exchange
ps. That one is optimized, processing time oringinally is 2 – 3s , it’s now 0.6 – 0.7s (for a 320*240 image).
April 14th, 2009 | Published in Uncategorized
I’ve been working on implementing a bilateral blur for Flash. Currently the functionality is ok but the performance is quite poor (on my Intel MacBook, processing a 320×240 image takes ~2s). I’ve even tried to replace the Gaussian weighting functions with linear functions but it does not help a lot but leads to worse quality. The problem should be the sampling size of each pixel which I hard coded to be 9×9 square. Reducing the sampling area would help but again reducing quality.
It is frustrating that Pixel Bender in Flash do not have loops. Even accessing vector/matrix elements with variable index is not possible.
Anyway, here below is a demo.
Before applying filter.
After applying filter.
Hope I can further optimize it later. (or better Adobe gives us GPU mode 
)
UPDATED: See this blog post
April 8th, 2009 | Published in Uncategorized
I have just made a independent study on “deep linking for AJAX” for the course Web 2.0 technology. Seems that most of the info on the web about deep linking implementation are for Flash web site but not AJAX’s, so I release my report and presentation slide here hoping can help somebody.