metlab控制摄像头操作笔记（一）基础操作
%显示已经按装的摄像头的硬件信息
>> imaqInfo=imaqhwinfo
Warning: No Image Acquisition adaptors found. Image acquisition adaptors may be available as downloadable
support packages. Open Support Package Installer to install additional vendors.
imaqInfo =
InstalledAdaptors: {}
MATLABVersion: '8.4 (R2014b)'
ToolboxName: 'Image Acquisition Toolbox'
ToolboxVersion: '4.8 (R2014b)'
提示看不到摄像头。按提示点击链接安装后
>> imaqInfo=imaqhwinfo
imaqInfo =
InstalledAdaptors: {'dcam'}
MATLABVersion: '8.4 (R2014b)'
ToolboxName: 'Image Acquisition Toolbox'
ToolboxVersion: '4.8 (R2014b)'
>>
我的笔记本自带一个USB的摄像头，想通过来自带的摄像头来拍照和保存图片
>> info=imaqhwinfo
info =
InstalledAdaptors: {'dcam'}
MATLABVersion: '8.4 (R2014b)'
ToolboxName: 'Image Acquisition Toolbox'
ToolboxVersion: '4.8 (R2014b)'
需要在supportpackageInstaller里面选择 OS Generic Video Interface安装后就可以看到摄像头：
>> info=imaqhwinfo
info =
InstalledAdaptors: {'dcam' 'winvideo'}
MATLABVersion: '8.4 (R2014b)'
ToolboxName: 'Image Acquisition Toolbox'
ToolboxVersion: '4.8 (R2014b)'
>>
%可以看到自带的摄像头的名称为winvideo
%查看winvideo摄像头的DeviceID后获取相机对象
>> winvideoinfo=imaqhwinfo('winvideo')
winvideoinfo =
AdaptorDllName: 'C:\MATLAB\SupportPackages\R2014b\osgenericvideointerface\toolbox\imaq\supportp...'
AdaptorDllVersion: '4.8 (R2014b)'
AdaptorName: 'winvideo'
DeviceIDs: {[1]}
DeviceInfo: [1x1 struct]
>>
%输出相机信息
>> winvideoinfo.DeviceInfo
ans =
DefaultFormat: 'MJPG_1280x720'
DeviceFileSupported: 0
DeviceName: 'Integrated Camera'
DeviceID: 1
VideoInputConstructor: 'videoinput('winvideo', 1)'
VideoDeviceConstructor: 'imaq.VideoDevice('winvideo', 1)'
SupportedFormats: {1x15 cell}
>>
%创建相机实例
>> vid=videoinput('winvideo',1,'MJPG_1280x720');
>> set(vid,'TriggerRepeat',Inf);
>> set(vid,'FramesPerTrigger',1);
>> set(vid,'FrameGrabInterval',1);
>> set(vid,'ReturnedColorSpace','rgb');
>> vidRes=get(vid,'VideoResolution');
>> nBands=get(vid,'NumberOfBands');
>> hImage=image(zeros(vidRes(2),vidRes(1),nBands));
>> preview(vid,hImage);
这样摄像头就显示出来了。
也可以通过APPS-》Image Acquisition来查看已经安装的摄像头信息列表。