1、打開攝像頭的代碼如下：
source.vid = videoinput('winvideo', 1,'YUY2_320x240');
set(source.vid,'ReturnedColorSpace','grayscale');
vidRes = get(source.vid, 'VideoResolution');
nBands = get(source.vid, 'NumberOfBands');
hImage = image( zeros(vidRes(2), vidRes(1), nBands) );
preview(source.vid, hImage);
2、獲取攝像頭相關信息如下：
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%5
% >> win_info=imaqhwinfo('winvideo')%我們看看第二適配器的具體參數
%
% win_info =
%
% AdaptorDllName: [1x81 char]%適配器dll文件絕對路徑
% AdaptorDllVersion: '3.1 (R2008a)'%適配器dll文件版本
% AdaptorName: 'winvideo'%適配器名稱
% DeviceIDs: {[1]}%設備ID號，這個我們經常需要用到
% DeviceInfo: [1x1 struct]%設備信息，這裏主要是圖像獲取設備的一些參數，比較重要
%
% %====================下面我們瞭解下，這個圖像獲取設備到底有哪些的詳細信息吧====================
%
% >> win_info.DeviceIDs
%
% ans =
%
% [1]
%
% >> dev_win_info=win_info.DeviceInfo
%
% dev_win_info =
%
% DefaultFormat: 'RGB24_320x240'%獲取圖片的默認格式
% DeviceFileSupported: 0
% DeviceName: 'USB PC CAMERA P227'%設備名稱
% DeviceID: 1%設備號
% ObjectConstructor: 'videoinput('winvideo', 1)'%對象構建方式，這個絕大部分都是一樣的
% SupportedFormats: {1x12 cell}%獲取的圖像支持格式，一般都有好多種，上面的DefaultFormat只是默認格式而已
%
% %==================================看看圖像獲取設備支持的圖像格式==================================
%
% >> dev_win_info.SupportedFormats%可以看到我的PC上的攝像頭支持下面12中圖片格式
%
% ans =
%
% Columns 1 through 5
%
% 'I420_160x120' 'I420_176x144' 'I420_320x240' 'I420_352x288' 'I420_640x480'
%
% Columns 6 through 9
%
% 'RGB24_1280x960' 'RGB24_160x120' 'RGB24_176x144' 'RGB24_320x240'
%
% Columns 10 through 12
%
% 'RGB24_352x288' 'RGB24_640x480' 'RGB24_800x600'
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%5
