filter2

2-D digital filter.

Syntax

  • Y = filter2(H, X)

  • Y = filter2(H, X, shape)

Input argument

  • H - coefficients of rational transfer function.

  • X - input data.

  • shape - 'same' (default), 'valid' or 'full'.

Output argument

  • Y - result: 2-D digital filter.

Description

Y = filter2(H, X) applies a finite impulse response filter to a matrix of data X according to coefficients in a matrix H.

Example

A = zeros(10);
A(3:7, 3:7) = ones(5);
H = [1 2 1; 0 0 0; -1 -2 -1];
R = filter2(H, A, 'valid')

See also

conv2.

History

Author

Allan CORNET

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