How do I make live two cameras in a GUI?

Question

Fiddin Yusfida 2018-9-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/417369-how-do-i-make-live-two-cameras-in-a-gui

编辑： Fiddin Yusfida 2018-9-4

I want to make a GUI with two live cameras. But I only have an axes live, actually, it looks like two live cameras only in camB and camA is empty. Please help me solve this problem, thanks in advance.

Here is my code

 function varargout = dualcam(varargin)
% DUALCAM MATLAB code for dualcam.fig
%      DUALCAM, by itself, creates a new DUALCAM or raises the existing
%      singleton*.
%
%      H = DUALCAM returns the handle to a new DUALCAM or the handle to
%      the existing singleton*.
%
%      DUALCAM('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in DUALCAM.M with the given input arguments.
%
%      DUALCAM('Property','Value',...) creates a new DUALCAM or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before dualcam_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to dualcam_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 dualcam
 % Last Modified by GUIDE v2.5 01-Sep-2018 23:53:13
 % Begin initialization code - DO NOT EDIT
 gui_Singleton = 1;
 gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @dualcam_OpeningFcn, ...
                   'gui_OutputFcn',  @dualcam_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
 if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end
 if 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 dualcam is made visible.
 function dualcam_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 dualcam (see VARARGIN)
 % Choose default command line output for dualcam
 handles.output = hObject;
 handles.videoA = videoinput('winvideo',1);
 handles.videoB = videoinput('winvideo',3);
 set(handles.videoA,'TimerPeriod', 0.05, ...
 'TimerFcn',['if(~isempty(gco)),'...
 'handles=guidata(gcf);'... % Update handles
 'image(getsnapshot(handles.videoA));'... % Get picture using GETSNAPSHOT and put it into axes using IMAGE
 'set(handles.camA,''ytick'',[],''xtick'',[]),'... % Remove tickmarks and labels that are inserted when using IMAGE
 'set(handles.axCamA,''ytick'',[],''xtick'',[]),'...
 'else '...
 'delete(imaqfind);'... % Clean up - delete any image acquisition objects
 'end']);
 triggerconfig(handles.videoA,'manual');
 handles.videoA.FramesPerTrigger = Inf;
 set(handles.videoB,'TimerPeriod', 0.05, ...
 'TimerFcn',['if(~isempty(gco)),'...
 'handles=guidata(gcf);'... % Update handles
 'image(getsnapshot(handles.videoB));'... % Get picture using GETSNAPSHOT and put it into axes using IMAGE
 'set(handles.camB,''ytick'',[],''xtick'',[]),'... % Remove tickmarks and labels that are inserted when using IMAGE
 'set(handles.axCamB,''ytick'',[],''xtick'',[]),'...
 'else '...
 'delete(imaqfind);'... % Clean up - delete any image acquisition objects
 'end']);
 triggerconfig(handles.videoB,'manual');
 handles.videoB.FramesPerTrigger = Inf; % Capture frames until we manually stop it
 % Update handles structure
 guidata(hObject, handles);
 % UIWAIT makes dualcam wait for user response (see UIRESUME)
 uiwait(handles.dualcam);
 % --- Outputs from this function are returned to the command line.
 function varargout = dualcam_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 structure
 varargout{1} = handles.output;
 % --- Executes on button press in btnStart.
 function btnStart_Callback(hObject, eventdata, handles)
 % hObject    handle to btnStart (see GCBO)
 % eventdata  reserved - to be defined in a future version of MATLAB
 % handles    structure with handles and user data (see GUIDATA)
 if strcmp(get(handles.btnStart,'String'),'Start')
    % Camera is off. Change button string and start camera.
    set(handles.btnStart,'String','Stop')
    axes(handles.camA)
    start(handles.videoA)
    axes(handles.camB)
    start(handles.videoB)
 else
    % Camera is on. Stop camera and change button string.
    set(handles.btnStart,'String','Start')
    stop(handles.videoA)
    stop(handles.videoB)
 end
 % --- Executes when user attempts to close dualcam.
 function dualcam_CloseRequestFcn(hObject, eventdata, handles)
 % hObject    handle to dualcam (see GCBO)
 % eventdata  reserved - to be defined in a future version of MATLAB
 % handles    structure with handles and user data (see GUIDATA)
 % Hint: delete(hObject) closes the figure
 delete(hObject);
 delete(imaqfind);