rgbGUI(varargin)

function varargout = rgbGUI(varargin)
% RGBGUI Interactive gamma adjustment tool for images.
%    I = RGBGUI prompts the user to select an image file, then displays an
%    interactive control panel to adjust the gamma of each color channel in the
%    image. If the 'Cancel' button is pressed then RGBGUI returns the original
%    image, otherwise the adjusted image matrix is returned.
%
%    I = RGBGUI(H) attaches to the image plot identified by handle H.
%
%    I = RGBGUI(IMG) uses the image array I.

% Copyright 2010 The MathWorks, Inc.


% Last Modified by GUIDE v2.5 30-Nov-2009 14:27:51

% Begin initialization code - DO NOT EDIT
gui_Singleton = 0;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @rgbGUI_OpeningFcn, ...
                   'gui_OutputFcn',  @rgbGUI_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT


% --- Executes just before rgbGUI is made visible.
function rgbGUI_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to rgbGUI (see VARARGIN)

% Set callbacks
set(handles.bgChannel, 'SelectionChangeFcn',  ...
                       @rgbgui.bgChannelSelect);
set(handles.btnDone,   'Callback',            ...
                       @rgbgui.btnDoneCallback);
set(handles.btnCancel, 'Callback',              ...
                       @rgbgui.btnCancelCallback);
set(handles.fig,       'CloseRequestFcn', ...
                       @rgbgui.figClose   );

% Load data and create image plot if necessary.
[hi,I] = rgbgui.procinput(varargin{:});
handles.hi = hi;
handles.I  = I;

% Gamma point X and Y values
handles.P = {[0 0; 1 1] [0 0; 1 1] [0 0; 1 1]};

% Choose default command line output for rgbGUI
handles.output = I;

% Update handles structure
guidata(hObject, handles);

% Initialize channel controls and gamma plot
rgbgui.setChannels(hObject,[]);

% Position GUI
movegui(handles.fig,'center');

% Close if image is invalid, otherwise wait.
if isempty(I)
    disp('No image selected, exiting RGBGUI.');
    close(handles.fig);
else
    uiwait(handles.fig);
end



% --- Outputs from this function are returned to the command line.
function varargout = rgbGUI_OutputFcn(hObject, eventdata, handles) 
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;
delete(handles.fig);