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Next: Basic Smooth: 3x3 Up: Smoothing and Blurring Previous: Smoothing and Blurring   Contents Arithmetic Mean
The arithmetic mean simply takes an average of the pixels in the kernel. Each element in the filter is equal to $1$ divided by the total number of elements in the filter. Thus the 3x3 arithmetic mean filter is:

\begin{array}{r r r}
\frac{1}{9} & \frac{1}{9} & \fra...
...rac{1}{9} & \frac{1}{9} & \frac{1}{9} \\