mean image filter

Posted by turmoil on Stack Overflow See other posts from Stack Overflow or by turmoil
Published on 2010-05-02T08:31:05Z Indexed on 2010/05/02 8:37 UTC
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Starting to learn image filtering and stumped on a question found on website: Applying a 3×3 mean filter twice does not produce quite the same result as applying a 5×5 mean filter once. However, a 5×5 convolution kernel can be constructed which is equivalent. What does this kernel look like?

Would appreciate help so that I can understand the subject better. Thanks.

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