在matlab中GUI环境下通过摄像头读入视频并处理 手记（未完）

目标：在matlab中GUI环境下通过摄像头读入视频并实时处理（实时可能比较困难）

1、建立GUI界面，通过摄像头读取视频，并灰度化处理。  完整的m文件如下。（matlab2010a）

function varargout = faceDetection(varargin)% FACEDETECTION M-file for faceDetection.fig%      FACEDETECTION, by itself, creates a new FACEDETECTION or raises the existing%      singleton*.%%      H = FACEDETECTION returns the handle to a new FACEDETECTION or the handle to%      the existing singleton*.%%      FACEDETECTION('CALLBACK',hObject,eventData,handles,...) calls the local%      function named CALLBACK in FACEDETECTION.M with the given input arguments.%%      FACEDETECTION('Property','Value',...) creates a new FACEDETECTION or raises the%      existing singleton*.  Starting from the left, property value pairs are%      applied to the GUI before faceDetection_OpeningFcn gets called.  An%      unrecognized property name or invalid value makes property application%      stop.  All inputs are passed to faceDetection_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 faceDetection% Last Modified by GUIDE v2.5 25-Jan-2014 15:26:28% Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct('gui_Name',       mfilename, ...                   'gui_Singleton',  gui_Singleton, ...                   'gui_OpeningFcn', @faceDetection_OpeningFcn, ...                   'gui_OutputFcn',  @faceDetection_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 faceDetection is made visible.function faceDetection_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 faceDetection (see VARARGIN)% Choose default command line output for faceDetectionhandles.output = hObject;% Update handles structureguidata(hObject, handles);% UIWAIT makes faceDetection wait for user response (see UIRESUME)% uiwait(handles.figure1);% --- Outputs from this function are returned to the command line.function varargout = faceDetection_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 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)%version1--------------------------------------------------------% imaqhwinfo('winvideo');% vid1=videoinput('winvideo',1);% usbVidRes1=get(vid1,'videoResolution');% nBands1=get(vid1,'NumberOfBands');% axes(handles.axes1);% hImage1=imshow(zeros(usbVidRes1(2),usbVidRes1(1),nBands1));% preview(vid1,hImage1);%version2---------------------------------------------------------这里是重点imaqhwinfo('winvideo');vid1=videoinput('winvideo',1);usbVidRes1=get(vid1,'videoResolution');nBands1=get(vid1,'NumberOfBands');axes(handles.axes1);hImage1=imshow(zeros(usbVidRes1(2),usbVidRes1(1),nBands1));preview(vid1,hImage1);while (1)    frame=getsnapshot(vid1);    frame=rgb2gray(frame);    axes(handles.axes2);    imshow(frame)end% --- 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)% --- Executes on button press in pushbutton3.function pushbutton3_Callback(hObject, eventdata, handles)% hObject    handle to pushbutton3 (see GCBO)% eventdata  reserved - to be defined in a future version of MATLAB% handles    structure with handles and user data (see GUIDATA)close(gcf);

效果图：

2. matlab- videoinput 参数说明

输入格式：vid=videoinput（adaptorname，deviceID，format）

        TriggerRepeat 重复触发

        FramesPerTrigger : trigger触发时获取的帧数

        FrameGrabInterval帧的抓取间隔 （默认的是1，即每一帧都抓取；如果设置为3，则每3帧取一帧）

VideoResolution: 视频分辨率

NumberOfBands: 色彩（rgb是相当于是三通道）