Avi video file tracking bright light black background

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A Sez
A Sez 2014-7-16
评论： Image Analyst 2014-7-16
Hi I have an avi video file which is a recording of a light source (almost circular but flickers) moving along the length of the video. It is recorded in black and white and the background is completely black.
I need to extract data so I can plot it's average movement along the x-axis (box-whisker type plot). Can anyone point me to the right direction? Thank you.

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Image Analyst
Image Analyst 2014-7-16
See my Image Segmentation Tutorial http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862 for how to get the centroid of a bright object on a dark background. Then see my attached demo for how to process a video file.
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A Sez
A Sez 2014-7-16
I encountered a problem. The flame I have is all over the place. Is this code modifiable so that it measures the movement of the flame edge? I.e. from the right hand side of the image it measures the distance from the edge to where light starts appearing (then keep track of it's movement as the avi file progresses)?

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