mdoublem matlab,idouble.m · zigzag2015/machinevision-toolbox-matlab - Gitee.com

%IDOUBLE Convert integer image to double

%

% IMD = IDOUBLE(IM, OPTIONS) is an image with double precision elements in the

% range 0 to 1 corresponding to the elements of IM. The integer pixels IM

% are assumed to span the range 0 to the maximum value of their integer class.

%

% Options::

% 'single' Return an array of single precision floats instead of doubles.

% 'float' As above.

%

% Notes::

% - Works for an image with arbitrary number of dimensions, eg. a color

% image or image sequence.

% - There is a linear mapping (scaling) of the values of IMD to IM.

%

% See also IINT, CAST.

% 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 .

function out = idouble(im, varargin)

opt.single = false;

opt.float = false;

opt = tb_optparse(opt, varargin);

if opt.single || opt.float

% convert to float pixel values

if isinteger(im)

out = single(im) / single(intmax(class(im)));

else

out = single(im);

end

else

% convert to double pixel values (default)

if isinteger(im)

out = double(im) / double(intmax(class(im)));

else

out = double(im);

end

end

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