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Convolution matrix for diagonal motion blur

I know my question is not a programming question, but it came out of programming. Does anyone know a convolution matrix for diagonal motion blur. 3x3, 4x4 or 5x5 are good.

Thank,

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This is 5x5:

   0.22222   0.27778   0.22222   0.05556   0.00000
   0.27778   0.44444   0.44444   0.22222   0.05556
   0.22222   0.44444   0.55556   0.44444   0.22222
   0.05556   0.22222   0.44444   0.44444   0.27778
   0.00000   0.05556   0.22222   0.27778   0.22222


I basically drew a diagonal line and then blurred it a little.

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