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126 lines
4.4 KiB
Matlab
126 lines
4.4 KiB
Matlab
% FUNCTION IM = C2IMAGE(A)
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%
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% Returns a RGB image of complex array A where
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% the phase is mapped to hue, and the amplitude
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% is mapped to brightness.
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%*-----------------------------------------------------------------------*
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%| |
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%| Except where otherwise noted, this work is licensed under a |
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%| Creative Commons Attribution-NonCommercial-ShareAlike 4.0 |
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%| International (CC BY-NC-SA 4.0) license. |
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%| |
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%| Copyright (c) 2017 by Paul Scherrer Institute (http://www.psi.ch) |
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%| |
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%| Author: CXS group, PSI |
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%*-----------------------------------------------------------------------*
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% You may use this code with the following provisions:
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%
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% If the code is fully or partially redistributed, or rewritten in another
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% computing language this notice should be included in the redistribution.
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%
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% If this code, or subfunctions or parts of it, is used for research in a
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% publication or if it is fully or partially rewritten for another
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% computing language the authors and institution should be acknowledged
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% in written form in the publication: “Data processing was carried out
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% using the “cSAXS matlab package” developed by the CXS group,
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% Paul Scherrer Institut, Switzerland.”
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% Variations on the latter text can be incorporated upon discussion with
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% the CXS group if needed to more specifically reflect the use of the package
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% for the published work.
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%
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% A publication that focuses on describing features, or parameters, that
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% are already existing in the code should be first discussed with the
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% authors.
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%
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% This code and subroutines are part of a continuous development, they
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% are provided “as they are” without guarantees or liability on part
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% of PSI or the authors. It is the user responsibility to ensure its
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% proper use and the correctness of the results.
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function im = c2image(a, varargin)
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if ismatrix(a)
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absa = abs(a);
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phasea = angle(a);
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% (optional second argument can switch between various plotting modes)
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abs_range = [];
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if nargin==2
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m = varargin{1};
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elseif nargin==3
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m = varargin{1};
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abs_range = varargin{2};
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else
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m = 1;
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end
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if isempty(abs_range)
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nabsa = absa/max(max(absa));
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else
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nabsa = (absa - abs_range(1))/(abs_range(2) - abs_range(1));
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nabsa(nabsa < 0) = 0;
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nabsa(nabsa > 1) = 1;
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end
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switch m
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case 1
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im_hsv = zeros([size(a) 3]);
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im_hsv(:,:,1) = mod(phasea,2*pi)/(2*pi);
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im_hsv(:,:,2) = 1;
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im_hsv(:,:,3) = nabsa;
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im = hsv2rgb(im_hsv);
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case 2
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im_hsv = ones([size(a) 3]);
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im_hsv(:,:,1) = mod(phasea,2*pi)/(2*pi);
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im_hsv(:,:,2) = nabsa;
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im = hsv2rgb(im_hsv);
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end
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elseif ndims(a)==3
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sz = size(a);
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im_hsv = zeros([sz 3]);
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im = zeros([sz 3]);
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for ii=1:sz(3)
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absa = abs(a(:,:,ii));
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phasea = angle(a(:,:,ii));
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% (optional second argument can switch between various plotting modes)
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abs_range = [];
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if nargin==2
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m = varargin{1};
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elseif nargin==3
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m = varargin{1};
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abs_range = varargin{2};
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else
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m = 1;
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end
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if isempty(abs_range)
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nabsa = absa/max(max(absa));
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else
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nabsa = (absa - abs_range(1))/(abs_range(2) - abs_range(1));
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nabsa(nabsa < 0) = 0;
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nabsa(nabsa > 1) = 1;
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end
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switch m
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case 1
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im_hsv(:,:,ii,1) = mod(phasea,2*pi)/(2*pi);
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im_hsv(:,:,ii,2) = 1;
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im_hsv(:,:,ii,3) = nabsa;
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case 2
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im_hsv(:,:,ii,1) = mod(phasea,2*pi)/(2*pi);
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im_hsv(:,:,ii,2) = nabsa;
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end
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im(:,:,ii,:) = hsv2rgb(squeeze(im_hsv(:,:,ii,:)));
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end
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end
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end
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