MATLAB: 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

Question

    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??

Answer 1

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