1 简介

Ｆｉｓｈｅｒ分类器同ＳＶＭ（ｓｕｐｐｏｒｔｖｅｃｔｏｒｍａｃｈｉｎｅ）分类器一样是有监督分类方法，它通过计算图像的类内散布矩阵和类间散布矩阵，找到最 优 投 影面，使投影方向上的类内数据尽量密集而类间数据尽量分散。

2 部分代码

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 a new 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 or invalid 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 EDITgui_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});endif 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_guihandles.output = hObject;% Update handles structureguidata(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 structurevarargout{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;  %定义一个标志，1表示绘图，0表示停止绘图global x;global y;draw_enable=1;if draw_enable    position=get(gca,'currentpoint');  %gca（获取当前坐标轴的句柄）    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);   %鼠标移动，随时更新数据end% --- Executes on mouse press over figure background, over a disabled or% --- 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 Wglobal W0img=getframe(handles.axes1);img=imresize(img.cdata,[28,28]);img=im2bw(img,graythresh(img)); img=~img;axes(handles.axes2);img1=~img;imshow(img1);%img1为预览图像%计算概率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);    endendpredict=W'*lett';predict=predict-W0';for i=1:10    num=size(find(predict(i*9-8:i*9)>0),1);    total(i)=num;end[~,num]=max(total);set(handles.num,'string',num2str(num-1));% --- Executes on button press in pushbutton2.function pushbutton2_Callback(hObject, eventdata, handles)% hObject    handle to pushbutton2 (see GCBO)% eventdata  reserved - to be defined in a future version of MATLAB% handles    structure with handles and user data (see GUIDATA)set(handles.num,'string','');axes(handles.axes1);cla;axes(handles.axes2);cla;   %cla清空坐标轴

3 仿真结果

4 参考文献

[1]王海涛, 丁宣浩. 基于Fisher分类和自适应阈值的分形图像编码方法[J]. 广西科学, 2008, 15(3):3.

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