Handwritten digit recognition Based on Matlab Fisher classification handwritten digit recognition

A list,

Fisher classifiers are used to solve linear separable problems of two kinds.

Basic principle of Fisher’s criterion: find the most appropriate projection axis, so that the distance between the projection of two types of samples on this axis is as far as possible, and the projection of each type of samples is as compact as possible, so as to achieve the best classification effect.

For example, in the figure above, the squares and dots can be separated by projecting them onto W1 and then setting appropriate thresholds.

Ii. Source code

function varargout = main_gui(varargin)
% MAIN_GUI MATLAB code for main_gui.fig
%      MAIN_GUI, by itself, creates a new MAIN_GUI or raises the existing
%      singleton*.
%
%      H = MAIN_GUI returns the handle to a new MAIN_GUI or the handle to
%      the existing singleton*.
%
%      MAIN_GUI('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in MAIN_GUI.M with the given input arguments.
%
%      MAIN_GUI('Property'.'Value',...). creates anew MAIN_GUI or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before main_gui_OpeningFcn gets called.  An
%      unrecognized property name orinvalid value makes property application % stop. All inputs are passed to main_gui_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 main_gui

% Last Modified by GUIDE v2. 5 02-Apr- 2019. 15:37:29

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @main_gui_OpeningFcn, ...
                   'gui_OutputFcn',  @main_gui_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 main_gui is made visible.
function main_gui_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 main_gui (see VARARGIN)
% set( handles.axes1, 'visible'.'off' );
% set( handles.axes1, 'box'.'on' );
global W W0;
load W 
load W0

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = main_gui_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 on mouse press over figure background, over a disabled or
% --- inactive control, or over an axes background.
function figure1_WindowButtonDownFcn(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)
global draw_enable; % defines a flag,1Representation drawing,0Stop drawing global x; global y; draw_enable=1;
if draw_enable
    position=get(gca,'currentpoint'); %gca (get handle to current axis) x(1)=position(1);
    y(1)=position(3);
end


% --- Executes on mouse motion over figure - except title and menu.
function figure1_WindowButtonMotionFcn(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)
global draw_enable;
global x;
global y;
global h1;
if draw_enable==1
    position=get(gca,'currentpoint');
    x(2)=position(1);
    y(2)=position(3);
    h1=line(x,y,'LineWidth'.25.'color'.'k'.'Linestyle'.'-');
    x(1)=x(2);
    y(1)=y(2); End % -- Executes on mouse press over figure background, over a disabledor
% --- inactive control, or over an axes background.
function figure1_WindowButtonUpFcn(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)
global draw_enable;
    draw_enable=0;

function num_Callback(hObject, eventdata, handles)
% hObject    handle to num (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 num as text
%        str2double(get(hObject,'String')) returns contents of num as a double


% --- Executes during object creation, after setting all properties.
function num_CreateFcn(hObject, eventdata, handles)
% hObject    handle to num (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)
global W
global W0
img=getframe(handles.axes1);
img=imresize(img.cdata,[28.28]); img=im2bw(img,graythresh(img)); img=~img; axes(handles.axes2); img1=~img; imshow(img1); %img1 calculates probability for preview image %for cnt=1:4
    for cnt2=1:4
        Atemp=sum(img(((cnt*7- 6):(cnt*7)),((cnt2*7- 6):(cnt2*7)))); %10*10box
        lett((cnt- 1) *4+cnt2)=sum(Atemp);
    end
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