Used to apply the same operation to a stack of array elements.
The only constraint on the function specified in fHandle is that given
two differrent input arrays a1 and a2, if a1 and a2 have the same
dimensions then the outputs b1 and b2 must have the same dimensions. For
long operations shows progress information.
A can have arbitrary dimension. Suppose A has size d1 x d2 ... x dn.
Then for the purpose of this function A has dn elements, where
A(:,:,...,i) is the ith element. This function then applies the
operation in fHandle, with paramters given in varargin, to each element
in A. The results are returned in the array B, of size f1 x f2 x ... x fk
x dn. Each of the n element of B of the form B(:,:,...,i) is the the
result of applying fHandle to A(:,:,...,i). A may also be a cell array,
see the last example.
A limitation of fevalArrays is that it does not pass state information
to fHandle. For example, fHandle may want to know how many times it's
been called. This can be overcome by saving state information inside
fHandle using 'persistent' variables. For an example see imwrite2.
USAGE
B = fevalArrays( A, fHandle, varargin )
INPUTS
A - input array
fHandle - operation to apply to each 'element' of A
params - [varargin] parameters for each operation specified by fHandle
OUTPUTS
B - output array
EXAMPLE
B = fevalArrays( A, @rgb2gray ); % where A is MxNx3xR
B = fevalArrays( A, @imresize, .5 ); % where A is MxNxR
B = fevalArrays( A, @imNormalize ); % where A has arbitrary dims
B = fevalArrays( A, @(x) {imresize(x{1},.5)} ); % A is cell array
See also FEVALIMAGES, FEVALMATS, ARRAYFUN
IMWRITE2, PERSISTENT, TICSTATUS,
Piotr's Computer Vision Matlab Toolbox Version 2.0
Copyright 2014 Piotr Dollar. [pdollar-at-gmail.com]
Licensed under the Simplified BSD License [see external/bsd.txt]