mfilter2.m

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function J = mfilter2(varargin)
%MFILTER2 Masked filter.
%   Note:  This function has been grandfathered; use roifilt2
%   instead.
%
%   J = MFILTER2(H,I,BW) filters the data in I with the 2-D
%   filter H.  The result J will contain the filtered values of I
%   where the values of the binary mask BW are non-zero and will
%   contain the unfiltered values of I everywhere else.  The mask
%   BW must be the same size as I and contain only 1's and 0's.
%   FILTER2(H,I) is used to perform the filtering.
%
%   J = MFILTER2(I,BW,FUN) filters the data in I by calling
%   FUN. FUN may be a string containing the name of a function, a
%   string containing an expression, or an inline function
%   object. FUN is called using the syntax FUN(X), and it should
%   return a matrix of the same size as its input. Additional
%   parameters can be passed to FUN using the syntax J =
%   MFILTER2(I,BW,'fun',P1,P2,P3,...), in which case FUN is
%   called using FUN(X,P1,P2,P3,...).  
%
%   The class of I may be double or uint8. With the syntax 
%   J = MFILTER2(H,I,BW), the class of J is double. With the
%   syntax J = MFILTER2(I,BW,FUN) the class of J is uint8 if I is
%   uint8 and FUN returns uint8; otherwise the class of J is
%   double. 
%
%   See also FILTER2, ROIPOLY.

%   Clay M. Thompson 2-10-93
%   Copyright 1993-1998 The MathWorks, Inc.  All Rights Reserved.
%   $Revision: 5.10 $  $Date: 1997/11/24 15:35:57 $

J = roifilt2(varargin{:});