在Matlab GUI和函数中编程

我是Matlab新手，尝试在Matlab中编程一个GUI，它将在我的笔记本电脑上显示一个小窗口中的摄像头。我试图创建一个函数，推动它将启动我已经完成的摄像头，但同时我想要拍摄5秒快照并在我的主窗口中显示图像。我需要这方面的帮助。如何将图形大小设置为更大。下面是我的MATLAB代码在Matlab GUI和函数中编程

% Create a video input object. 
vid = videoinput('winvideo'); 

% Create a figure window. This example turns off the default 
% toolbar and menubar in the figure. 
hFig = figure('Toolbar','none',... 
     'Menubar', 'none',... 
     'NumberTitle','Off',... 
     'Name','LegoBot'); 




% Set up the push buttons 
uicontrol('String', 'Start Preview',... 
    'Callback', 'preview(vid)',... 
    'Units','normalized',... 
    'Position',[0 0 0.15 .07]); 
uicontrol('String', 'Stop Preview',... 
    'Callback', 'stoppreview(vid)',... 
    'Units','normalized',... 
    'Position',[.17 0 .15 .07]); 
uicontrol('String', 'Close',... 
    'Callback', 'close(gcf)',... 
    'Units','normalized',... 
    'Position',[0.34 0 .15 .07]); 



% Create the text label for the timestamp 
hTextLabel = uicontrol('style','text','String','Timestamp', ... 
    'Units','normalized',... 
    'Position',[0.85 -.04 .15 .08]); 

% Create the image object in which you want to 
% display the video preview data. 
vidRes = get(vid, 'VideoResolution'); 
imWidth = vidRes(1); 
imHeight = vidRes(2); 
nBands = get(vid, 'NumberOfBands'); 
hImage = image(zeros(imHeight, imWidth, nBands)); 

% Specify the size of the axes that contains the image object 
% so that it displays the image at the right resolution and 
% centers it in the figure window. 
figSize = get(hFig,'Position'); 
figWidth = figSize(7); 
figHeight = figSize(8); 
set(gca,'unit','pixels',... 
     'position',[ ((figWidth - imWidth)/2)... 
        ((figHeight - imHeight)/2)... 
         imWidth imHeight ]); 

% Set up the update preview window function. 
setappdata(hImage,'UpdatePreviewWindowFcn',@mypreview_fcn); 

% Make handle to text label available to update function. 
setappdata(hImage,'HandleToTimestampLabel',hTextLabel); 

preview(vid, hImage);

来源

2011-03-30 user427641

我不能强调在MATLAB以外的指南中开发GUI是一项非常困难的任务，并且不适用于初学者。 – linuxuser27 2011-03-30 16:44:21

...那么真正的问题是什么？我可以第二个linuxuser的建议使用指南，这有助于你的情况？如果不是，实际问题是什么？ – 2011-04-13 15:06:09

我同意与先前的评论，有关使用指南，我也建议使用数据accquition工具箱，因为有人在这里DAQ Matlab Webcam完成，尝试围绕编写代码在这种情况下你可以按照需要的时间间隔循环收集数据。

希望帮助，

来源

2011-08-07 12:54:03 eWizardII

好笑的是，我只是写代码今天上午处理这个问题。您将不得不添加自己的逻辑来退出循环，但这应该适用于您。

% Initialize variables 
objects = imaqfind; delete(objects); clear objects 
cameraOn = true; %Loop initialization 
counter = 0; 
fileName = 'OutputFile'; 

%Initialize Webcam Object 
vid = videoinput('winvideo'); 
src = getselectedsource(vid); 
get(src); 

% Configure Camera 
vid = videoinput('winvideo', 1, 'MJPG_640x480'); %Gotten from imaqtool 
src = getselectedsource(vid); 
triggerconfig(vid, 'manual'); 
src.ExposureMode = 'manual'; %Speeds up webcam to max 
src.BacklightCompensation = 'off'; %Speeds up webcam to max 

% Call Preview Window 
vid = videoinput('winvideo',1); 
preview(vid) 

% Begin snapshot collection 
while cameraOn == true; 
for ii = 5:-1:1 
    display([num2str(ii)]); %Display a countdown 
    pause(1); 
end 
snapshot = getsnapshot(vid); %Collect video frame 
counter=counter+1; 
imwrite(snapshot,[fileName,num2str(counter,3),'.png'],'png'); 
end 

% Stop previewing video data. 
stoppreview(vid); 

delete(vid); clear vid

来源

2013-09-07 14:11:21

在Matlab GUI和函数中编程

回答

相关问题