when i use this code matlab even hangs or give me constant blue screen any ideas ?

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Amr
Amr 2012-12-31
if true
clear all
clc
cd c:\try
a=0;
obj = videoinput('winvideo', 1);
preview(obj);
frame =rgb2gray(getsnapshot(obj));
while a<1
% for i = 1:1000
frame1 = rgb2gray(getsnapshot(obj));
x= frame-frame1;
border = edge(x,'canny');
image(border);
end
end

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回答（2 个）

Image Analyst
Image Analyst 2012-12-31
Step through it with the debugger. Which line causes the problems?
Walter Roberson
Walter Roberson 2012-12-31
You never change "a" so it will always be less than 1.
Also you should add
drawnow()
after the image() call.

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