Applying Graphics Filters Using Convolution

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Using list convolution, one can apply different filters to graphics arrays. Above are two examples: a blurring filter and a shadowing filter, applied to a graphical representation of a letter.
Contributed by: Brian Van Vertloo (March 2011)
Open content licensed under CC BY-NC-SA
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"Applying Graphics Filters Using Convolution"
http://demonstrations.wolfram.com/ApplyingGraphicsFiltersUsingConvolution/
Wolfram Demonstrations Project
Published: March 7 2011