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Faster Blur

Started by nikita, October 08, 2008, 03:48:53 am

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October 08, 2008, 03:48:53 am Last Edit: October 08, 2008, 03:52:30 am by nikita
I made a macro to fill the gap between uniform and gaussian blur: Hybrid Blur
You can get it on my website: http://nkblog.nkdev.de/?page_id=446 it's at the bottom of the page.

It's supposed to be faster than gaussian blur but without the artifacts uniform blur creates. Here is a comparison of the two existing types of blur and my macro:

The results are better than I thought and it's 35% faster than gaussian blur!
That's probably not a relevant speed-up for small terrains built on fast multi-core machines, but in certain cases (large terrains, lot's of blurring, slow machine) it can save you some time.
Having used a 650MHz pc myself, I know that blurring can in fact take long enough to wish you had a faster blur device :)

edit: btw this implements filtering with the triangle function. (As opposed to gaussian and uniform blur which use the gaussian and rectangle function respectively)
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