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imeshgrid.m
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imeshgrid.m
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%IMESHGRID Domain matrices for image
%
% [U,V] = IMESHGRID(IM) are matrices that describe the domain of image IM (HxW)
% and are each HxW. These matrices are used for the evaluation of functions
% over the image. The element U(R,C) = C and V(R,C) = R.
%
% [U,V] = IMESHGRID(W, H) as above but the domain is WxH.
%
% [U,V] = IMESHGRID(S) as above but the domain is described by S which can
% be a scalar SxS or a 2-vector S=[W, H].
%
% See also MESHGRID, INTERP2.
% Copyright (C) 1993-2011, by Peter I. Corke
%
% This file is part of The Machine Vision Toolbox for Matlab (MVTB).
%
% MVTB is free software: you can redistribute it and/or modify
% it under the terms of the GNU Lesser General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% MVTB is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU Lesser General Public License for more details.
%
% You should have received a copy of the GNU Leser General Public License
% along with MVTB. If not, see <http://www.gnu.org/licenses/>.
function [U,V] = imeshgrid(a1, a2)
if nargin == 1
if length(a1) == 1
% we specified a size for a square output image
[U,V] = meshgrid(1:a1, 1:a1);
elseif numel(a1) == 2
% we specified a size for a rectangular output image (w,h)
[U,V] = meshgrid(1:a1(1), 1:a1(2));
elseif ndims(a1) >= 2
[U,V] = meshgrid(1:numcols(a1), 1:numrows(a1));
else
error('incorrect argument');
end
elseif nargin == 2
[U,V] = meshgrid(1:a1, 1:a2);
end