If we have a set of pixel like below:netmaestro wrote:How to achieve faster performance for the blur ?
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0000F0000
- in a left shift
- in a right shift
through an graduate alphablending, the result is:
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0007F7000
Now, on a plane, let's imagine 8 specific alpha values for the 8 directions over a pixel :
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a b a
b P b
a b a
b = 1/2
If we do a grab of an image and apply 8 copies of this image matching the eight following shifts:
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x y alpha
-1 -1 a
-1 0 b
-1 +1 a
0 -1 b
0 +1 b
+1 -1 a
+1 0 b
+1 +1 a