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Hi, I'd like to perform a blur effect on a picture. I would like to use a gaussian blur filter. Where can I found the matrix (I'd like the size to be 7*7 or 9*9) Thanks
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gaussian blur
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http://homepages.inf.ed.ac.uk/rbf/HIPR2/gsmooth.htm
For the mathematically inclined, you can get a little background and learn how to basically create your own matrix of a particular size and variance. Or, you can just steal the 7x7 matrix they provide. Don't forget to divide all the numbers by the division factor so the entire matrix adds up to 1. Also, it should be noted that these filters are almost always seperable, and therefore can be done in 2-passes with N sized vectors instead of an NxN matrix... this is generally faster.
For the mathematically inclined, you can get a little background and learn how to basically create your own matrix of a particular size and variance. Or, you can just steal the 7x7 matrix they provide. Don't forget to divide all the numbers by the division factor so the entire matrix adds up to 1. Also, it should be noted that these filters are almost always seperable, and therefore can be done in 2-passes with N sized vectors instead of an NxN matrix... this is generally faster.
Thanks
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