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Справка Scilab >> Signal Processing > Correlation Convolution > convol2d

convol2d

discrete 2-D convolution, using fft.

Syntax

C = convol2d(A,B)

Parameters

A

a real or complex 2-D array.

B

a real or complex 2-D array.

C

a real or complex 2-D array.

Description

convol2d uses fft to compute the full two-dimensional discrete convolution. The dimensions of the resultC are given by size(A)+size(B)+1. The indices of the center element of B are defined as floor((size(B)+1)/2).

Examples

s = [1 2 1; 0 0 0; -1 -2 -1];//Sobel horizontal edge kernel
A = zeros(10,10);A(3:7,3:7) = 1;
convol2d(s,A);

See also

Used Functions

The convol2d function is based on the fft builtin.

History

ВерсияОписание
5.4.0 Function convol2d introduced.
Scilab Enterprises
Copyright (c) 2011-2017 (Scilab Enterprises)
Copyright (c) 1989-2012 (INRIA)
Copyright (c) 1989-2007 (ENPC)
with contributors
Last updated:
Tue Feb 14 15:13:23 CET 2017