function varargout = EgalHisto1D(varargin)
% Egalisation d'histogramme 1D
% Pour image non binaire
% Traitement marginal des images à P plans
% 
% INPUT:
% - image PxQ, Q>1
% - valeur numérique : % du nombre de niveaux de gris de l'image
%
% OUTPUT:
% - image PxQ
%
% Plugin for OpenIsaac
% version 1
% © 2011-2018 Alain Clément - Université d'Angers

%---------------------------------------------------------------------------------------------------

% Copyright 2007 - 2018 Université d'Angers - Author: Alain Clément
%
% This program is free software; you can redistribute it and/or modify it under the terms of the GNU
% General Public License as published by the Free Software Foundation; either version 3 of the
% License, or any later version. This program 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 General Public License for more details. You should have received
% a copy of the GNU General Public License along with this program; if not, write to the Free
% Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

%---------------------------------------------------------------------------------------------------

% PLUGIN PARAMETERS
if (nargin == 1) && strcmp(varargin{1},'-f')
    % input
	varargout{1} = {'IMG','image', ...
					'DATA','% nb de niveaux de gris'};
    % output
	varargout{2} = {'IMG','image'};
	return
end	

% INPUT
ObjIMG = varargin{1};
val = IsaacDATA_get(varargin{2},'Val');

%---------------------------------------------------------------------------------------------------

if (IsaacIMG_get(ObjIMG,'BitClass') == 1)
	error('image incompatible')
end
img = IsaacIMG_img2mat(ObjIMG);
nbp = IsaacIMG_get(ObjIMG,'DimZ');
for k = 1:nbp
	nbval = max(round(length(unique(img(:,:,k)))*val/100),2);
	% nbval >= 2 OK même si 1 seul niveau de gris
	img(:,:,k) = histeq(img(:,:,k),nbval);	
end
ObjIMG = IsaacIMG_mat2img(ObjIMG,img);

%---------------------------------------------------------------------------------------------------

% OUTPUT
varargout{1} = ObjIMG;