Error in running the Scene change detection example in CV system toolbox

Hi, I am trying to use the example "Scene change detection" in Computer Vision system toolbox http://www.mathworks.in/help/vision/examples/scene-change-detection.html?prodcode=VP&language=en . The video example chosen in the example works fine for it but If i run it on any other video then I get error like this:

Matrix dimensions must agree. Error in scenechange (line 65)
edge_diff = abs(mean_blks - mean_blks_prev);

What does the matrix dimensions differ on any other example and not on the example video used? How can I fix this?

Answer 1

[Anand]

Replace the following line:

mean_blks_prev = zeros([15, 1], 'single');

with

mean_blks_prev = zeros([numel(X),1], 'single');

That should do the trick.

[Shekhar]

Thanks it worked. Although I was wondering if there is any other alogirth that gives a better run time.

[Shekhar]

Also what was the problem? Can you explain a bit?

[Anand]

The block size was hard-coded. When you used a different video, the sizes were different and so it bombed out.