Matlab Camera photo acquisition

Camera on code

The statement that the camera is turned on ：

obj =videoinput('DeviceName',1,'YUY2_640*480');

• DeviceName Is your available audio and video input device .

• “1” Represents an open device .

• YUY2_640*480 Represents a format .

Format configuration

set(obj,'ReturnedColorSpace','rgb')

The configuration format is RGB Format .

preview(obj);

Get images

getphoto = getsnapshot(obj);
filename = int2str(1);
filename = [filename,'jpg']
inwrite(getphoto,filename);

Turn off the camera

stop(obj);
closepreview(obj);
delete(obj);
clear;

About the problem

1、 Use obj =videoinput(‘DeviceName’,1,‘YUY2_640*480’); after
Misuse videoinput (line 217)
Invalid ADAPTORNAME specified. Type ‘imaqhwinfo’ for a list of available ADAPTORNAMEs. Image acquisition adaptors may be available as downloadable support packages. Open Support
Package Installer to install additional vendors.
The reason for this problem may be that you use DeviceName incorrect , Or installed Matlab The version is missing a plug-in . So first find the corresponding device name , Use ：

info=imaqhwinfo

A message will appear ：

info = 

    InstalledAdaptors: {
    }
        MATLABVersion: '8.3 (R2014a)'
          ToolboxName: 'Image Acquisition Toolbox'
       ToolboxVersion: '4.7 (R2014a)'

stay InstalledAdaptors There should have been the name of the device , But now there is no , The proof is actually due to the lack of plug-ins . So look at the error prompt above again ,

Support Package Installer 

This sentence is underlined , Click on it , The plug-in download interface will appear , Download and install . Finally, you can see the equipment when running

info = 

    InstalledAdaptors: {
    'dcam'}
        MATLABVersion: '8.3 (R2014a)'
          ToolboxName: 'Image Acquisition Toolbox'
       ToolboxVersion: '4.7 (R2014a)'

My device name is dcam
Finally, a camera 0.5s The code for taking an image ：

clear;
clc;
obj =videoinput('winvideo',1);
set(obj,'ReturnedColorSpace','rgb');
preview(obj);
for i=1:10
getphoto = getsnapshot(obj);
filename = int2str(i);
filename = [filename,'.jpg']
imwrite(getphoto,filename);
pause(0.5);
end
stop(obj);
closepreview(obj);
delete(obj);
clear;