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function out = imscale(in)
%------------------------------------------------------------------------
% out = imscale(in)
%
% Rescales the image values between zero and one.
%
% in: input image.
% out: scaled output image.
%------------------------------------------------------------------------
%------------------------------------------------------------------------
% This file is part of the ASTRA Toolbox
%
% Copyright: 2010-2021, imec Vision Lab, University of Antwerp
% 2014-2021, CWI, Amsterdam
% License: Open Source under GPLv3
% Contact: astra@astra-toolbox.com
% Website: http://www.astra-toolbox.com/
%------------------------------------------------------------------------
mi = min(in(:));
ma = max(in(:));
if (ma-mi) == 0
out = zeros(size(in));
else
out = (in - mi) / (ma - mi);
end
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