更改”.m“文件：

function varargout = untitled1(varargin)

% UNTITLED1 MATLAB code for untitled1.fig

%      UNTITLED1, by itself, creates a new UNTITLED1 or raises the existing

%      singleton*.

%

%      H = UNTITLED1 returns the handle to a new UNTITLED1 or the handle to

%      the existing singleton*.

%

%      UNTITLED1('CALLBACK',hObject,eventData,handles,...) calls the local

%      function named CALLBACK in UNTITLED1.M with the given input arguments.

%

%      UNTITLED1('Property','Value',...) creates a new UNTITLED1 or raises the

%      existing singleton*.  Starting from the left, property value pairs are

%      applied to the GUI before untitled1_OpeningFcn gets called.  An

%      unrecognized property name or invalid value makes property application

%      stop.  All inputs are passed to untitled1_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 untitled1

% Last Modified by GUIDE v2.5 12-Mar-2015 20:53:43

% Begin initialization code - DO NOT EDIT

gui_Singleton = 1;

gui_State = struct('gui_Name',       mfilename, ...

'gui_Singleton',  gui_Singleton, ...

'gui_OpeningFcn', @untitled1_OpeningFcn, ...

'gui_OutputFcn',  @untitled1_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 untitled1 is made visible.

function untitled1_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 untitled1 (see VARARGIN)

% Choose default command line output for untitled1

handles.output = hObject;

% Update handles structure

guidata(hObject, handles);

% UIWAIT makes untitled1 wait for user response (see UIRESUME)

% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.

function varargout = untitled1_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;

global vid;

vid = videoinput('winvideo');

%set(vid,'ReturnedColorSpace','grayscale');

function pushbutton1_Callback(hObject, eventdata, handles)

axes(handles.axes1);

global vid;

vidRes = vid.VideoResolution;

nBands = vid.NumberOfBands;

hImage = image( zeros(vidRes(2), vidRes(1), nBands) );

preview(vid, hImage);

% --- 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)

axes(handles.axes2);

global vid;

f=getsnapshot(vid);

imshow(f);