首先自己的电脑有个摄像头,如果没有插上USB摄像头 ,然后再启动Matlab(顺序不可返的)。
方法: 查询USB2.0Camera 的具体参数: 输入:imaqInfo = imaqhwinfo 返回: imaqInfo =
InstalledAdaptors: {'coreco' 'winvideo'} MATLABVersion: '7.6 (R2008a)' ToolboxName: 'Image Acquisition Toolbox' ToolboxVersion: '3.1 (R2008a)' 输入:winvideoinfo = imaqhwinfo('winvideo') 返回: winvideoinfo =
AdaptorDllName: 'C:\Program Files\MATLAB\R2008a\toolbox\imaq\imaqadaptors\win32\mwwinvideoimaq.dll' AdaptorDllVersion: '3.1 (R2008a)' AdaptorName: 'winvideo' DeviceIDs: {[1]} DeviceInfo: [1x1 struct] 输入:winvideoinfo.DeviceInfo 返回: ans =
DefaultFormat: 'YUY2_160x120' DeviceFileSupported: 0 DeviceName: 'USB2.0 Camera' DeviceID: 1 ObjectConstructor: 'videoinput('winvideo', 1)' SupportedFormats: {'YUY2_160x120' 'YUY2_176x144' 'YUY2_320x240' 'YUY2_352x288' 'YUY2_640x480'} 到此为止!最后一行可以看出你的相机支持的分辨率,我的usb摄像头最高支持640*480的 在语句中设置: vid=videoinput('winvideo',1,'YUY2_640x480'); set(vid,'TriggerRepeat',Inf); set(vid,'FramesPerTrigger',1); set(vid,'FrameGrabInterval',1); %设置返回色彩…… % set(vid,'ReturnedColorSpace','rgb'); set(vid,'ReturnedColorSpace','grayscale'); %获取分辨率,色彩数目等参数 vidRes=get(vid,'VideoResolution'); nBands=get(vid,'NumberOfBands');
hImage=image(zeros(vidRes(2),vidRes(1),nBands)); preview(vid,hImage);
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