error with my code

hi all ... I've encountered an error with this code .. especially with the imread part ... pls clear this ..

vid = videoinput('winvideo', 1 , 'RGB24_320x240');

preview(vid);

for i= 1:3

frame1=getsnapshot(vid);

imwrite(frame1,sprintf('image%d.jpg',i));

fname=save(‘C:\MATLAB7\work\NewFolder1’);

   I = imread('image%d.jpg'); 

   J=rgb2gray(I);

   figure,imshow(I),figure,imshow(J);

BW1=edge(J,'sobel');

BW2=edge(J,'canny');

figure,imshow(BW1),figure,imshow(BW2);

pause(1)

end

[Andreas Goser]

You help yourself by including the error message...

Answer 1

[David Young]

Have a look at the names of the files: you'll find that there isn't one called 'image%d.jpg', so imread cannot find such a file. (The files you create have names like image1.jpg, image2.jpg, ...)

Maybe you want to read back in the image that you have just written. If so, this should do it:

I = imread(sprintf('image%d.jpg',i));

However, if that is what you need, it will be much faster to use

I = frame1;

You do not need to write the images to disk at all, unless you want to refer to them later.

[Ananthi]

it worked thank you sir ....