i am using red object detection program,but the prb is i am unable to stop/interrupt the program when its running,plz help me
显示 更早的评论
if true
% codevid = videoinput('winvideo', 1, 'YUY2_640x480');
set(vid, 'FramesPerTrigger', Inf);
set(vid, 'ReturnedColorspace', 'rgb')
vid.FrameGrabInterval = 1;
start(vid)
while(vid.FramesAcquired<=50)
data = getsnapshot(vid);
diff_im = imsubtract(data(:,:,1), rgb2gray(data));
diff_im = medfilt2(diff_im, [3 3]);
diff_im = im2bw(diff_im,0.18);
diff_im = bwareaopen(diff_im,300);
bw = bwlabel(diff_im, 8);
stats = regionprops(bw, 'BoundingBox', 'Centroid');
imshow(data)
hold on
for object = 1:length(stats)
bb = stats(object).BoundingBox;
bc = stats(object).Centroid;
rectangle('Position',bb,'EdgeColor','r','LineWidth',2)
plot(bc(1),bc(2), '-m+')
a=text(bc(1)+15,bc(2), strcat('X: ', num2str(round(bc(1))), ' Y: ', num2str(round(bc(2)))));
set(a, 'FontName', 'Arial', 'FontWeight', 'bold', 'FontSize', 12, 'Color', 'yellow');
end
hold off
end
stop(vid);
delete(vid);
end
the program only stops after 50 frames are captured,i dont want to change it, but i should be able to force stop it at between, what is the code for it??
采纳的回答
Image Analyst
2013-4-17
You can have a checkbox on your GUI that says "Finish now" and then you check it in your while or for loop. If the checkbox is set, you break out. Put this in one of your loops, wherever you think it's appropriate.
if get(handles.checkboxQuit, 'Value')
break;
end
7 个评论
Walter Roberson
2013-4-17
That requires a change to the existing code, which the poster specifically asked not to do.
Image Analyst
2013-4-18
Yet he asked "what is the code for it??", so that even though he doesn't want a change he realizes that the code must change if it is to change behavior. Unless he just tried control-c or something.
vishnu andavar
2013-4-18
vishnu andavar
2013-4-18
Walter Roberson
2013-4-18
Put it between your "while" and the "getsnapshot" call.
dwaipayan chakraborty
2013-5-9
Here's what worked for me. After using ctrl-c, if it says that the camera is still in use, just type the following in the workspace :
stop (vid)
delete (vid)
Image Analyst
2013-5-9
Yeah, kind of like stopping your car by throwing a lug wrench into the serpentine belt instead of turning the ignition key off.
更多回答（2 个）
Walter Roberson
2013-4-17
0 个投票
The closest you might be able to get without changing that code, would be an arrangement to error out of the program. MATLAB is not designed to be able to force a loop to quit without the cooperation of the loop.
tairman singh
2013-4-18
Add this into your while loop
k=get(gcf,'currentkey');
if (k=='s')
disp('program stopped')
break
end
and when you press 's' in keyboard you'll be able to get out off the loop and also place these before end flushdata(vid) delete(vid) imaqreset close all clear all
Hope it'll help i'm having the same problem
2 个评论
vishnu andavar
2013-4-22
tairman singh
2013-5-3
keep pressing it until it breaks out of loop or put pause(0.2) before these commands.
类别
在 帮助中心 和 File Exchange 中查找有关 National Instruments Frame Grabbers 的更多信息
2013-4-17
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
