filter2() - Signal Processing

Y = filter2(h,X) filters
the data in X with the two-dimensional FIR filter
in the matrix h. It computes the result, Y,
using two-dimensional correlation, and returns the central part of
the correlation that is the same size as X.Y = filter2(h,X,shape) returns
the part of Y specified by the shape parameter. shape is
a string with one of these values:'full'Returns the full two-dimensional correlation. In this
case, Y is larger than X.
'same'(default) Returns the central part of the correlation.
In this case, Y is the same size as X.
'valid'Returns only those parts of the correlation that are
computed without zero-padded edges. In this case, Y is
smaller than X.

Syntax

Y = filter2(h,X)Y = filter2(h,X,shape)

Example

You can give an example if you know one.

Output / Return Value

Limitations

Alternatives / See Also

Reference