threshTest.m

function varargout = threshTest(varargin)
% THRESHTEST MATLAB code for threshTest.fig
%      THRESHTEST, by itself, creates a new THRESHTEST or raises the existing
%      singleton*.
%
%      H = THRESHTEST returns the handle to a new THRESHTEST or the handle to
%      the existing singleton*.
%
%      THRESHTEST('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in THRESHTEST.M with the given input arguments.
%
%      THRESHTEST('Property','Value',...) creates a new THRESHTEST or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before threshTest_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to threshTest_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help threshTest

% Last Modified by GUIDE v2.5 18-Jul-2011 17:05:09

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @threshTest_OpeningFcn, ...
                   'gui_OutputFcn',  @threshTest_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 threshTest is made visible.
function threshTest_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 threshTest (see VARARGIN)

% Choose default command line output for threshTest
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes threshTest wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = threshTest_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;


% --- Executes during object creation, after setting all properties.
function axes1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to axes1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: place code in OpeningFcn to populate axes1
thresh = 0.5;
fimg = ForensicImage('camCrop.jpg');
imgGray = rgb2gray(fimg.image);
imgBW = edge(imgGray,'sobel',str2double(thresh),'nothinning');
% axes(hObject)
imshow(imgBW)


% --- Executes on slider movement.
function slider1_Callback(hObject, eventdata, handles)
% hObject    handle to slider1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider

%obtains the slider value from the slider component
sliderValue = get(handles.slider1,'Value');
 
%puts the slider value into the edit text component
set(handles.slider_editText,'String', num2str(sliderValue));
 
% Update handles structure
guidata(hObject, handles);


% --- Executes during object creation, after setting all properties.
function slider1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end


% --- Executes on key press with focus on slider1 and none of its controls.
function slider1_KeyPressFcn(hObject, eventdata, handles)
% hObject    handle to slider1 (see GCBO)
% eventdata  structure with the following fields (see UICONTROL)
%	Key: name of the key that was pressed, in lower case
%	Character: character interpretation of the key(s) that was pressed
%	Modifier: name(s) of the modifier key(s) (i.e., control, shift) pressed
% handles    structure with handles and user data (see GUIDATA)



function slider_editText_Callback(hObject, eventdata, handles)
% hObject    handle to slider_editText (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of slider_editText as text
%        str2double(get(hObject,'String')) returns contents of slider_editText as a double

%get the string for the editText component
sliderValue = get(handles.slider_editText,'String');
 
%convert from string to number if possible, otherwise returns empty
sliderValue = str2num(sliderValue);
 
%if user inputs something is not a number, or if the input is less than 0
%or greater than 100, then the slider value defaults to 0
if (isempty(sliderValue) || sliderValue < 0 || sliderValue > 255)
    set(handles.slider1,'Value',0);
    set(handles.slider_editText,'String','0');
else
    set(handles.slider1,'Value',sliderValue);
end


% --- Executes during object creation, after setting all properties.
function slider_editText_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider_editText (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end


% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
thresh = get(handles.slider_editText,'String');
fimg = ForensicImage('camCrop.jpg');
imgGray = rgb2gray(fimg.image);
imgBW = edge(imgGray,'sobel',str2double(thresh),'nothinning');
imshow(imgBW)


% --- Executes on key press with focus on pushbutton1 and none of its controls.
function pushbutton1_KeyPressFcn(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  structure with the following fields (see UICONTROL)
%	Key: name of the key that was pressed, in lower case
%	Character: character interpretation of the key(s) that was pressed
%	Modifier: name(s) of the modifier key(s) (i.e., control, shift) pressed
% handles    structure with handles and user data (see GUIDATA)


% --- Executes when figure1 is resized.
function figure1_ResizeFcn(hObject, eventdata, handles)
% hObject    handle to figure1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)