Blur
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You can use 2 arguments to set independent Vertical and Horizontal amounts. Like this, you can use Blur(0,1) to filter only Vertically, for example to blend interlaced lines together. By default ''amountV''=''amountH''. | You can use 2 arguments to set independent Vertical and Horizontal amounts. Like this, you can use Blur(0,1) to filter only Vertically, for example to blend interlaced lines together. By default ''amountV''=''amountH''. | ||
| − | A Known issue, with the MMX routines is the lack of full 8 bit precision in the calculations.{{Citation_needed}} This can lead to banding in the resultant image. Set | + | A Known issue, with the MMX routines is the lack of full 8 bit precision in the calculations.{{Citation_needed}} This can lead to banding in the resultant image. Set |
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| + | The ''MMX''=False option was originally to work around an MMX limitation, but this problem no longer exists. By default, ''MMX''=True. | ||
'''Changes''' | '''Changes''' | ||
Revision as of 18:57, 21 September 2014
Blur(clip clip, float amount, bool MMX)
Blur(clip, float amountH, float amountV, bool MMX)
Sharpen(clip clip, float amount, bool MMX)
Sharpen(clip, float amountH, float amountV, bool MMX)
This is a simple 3x3-kernel blurring filter. The largest allowable argument for Blur is about 1.58, which corresponds to a (1/3, 1/3, 1/3) kernel. A value of 1.0 gets you a (1/4, 1/2, 1/4) kernel. If you want a large-radius Gaussian blur, I recommend chaining several copies of Blur(1.0) together. (Anybody remember Pascal's triangle?)
Negative arguments to Blur actually sharpen the image, and in fact Sharpen(n) is just an alias for Blur(-n). The smallest allowable argument to Blur is -1.0 and the largest to Sharpen is 1.0.
You can use 2 arguments to set independent Vertical and Horizontal amounts. Like this, you can use Blur(0,1) to filter only Vertically, for example to blend interlaced lines together. By default amountV=amountH.
A Known issue, with the MMX routines is the lack of full 8 bit precision in the calculations.[citation needed] This can lead to banding in the resultant image. Set
The MMX=False option was originally to work around an MMX limitation, but this problem no longer exists. By default, MMX=True.
Changes
| v2.57 | added MMX option |
