Draw a box around moving object

Hello, I am detecting the moving area of an object (e.g. moving pendulum of the clock) by subtracting one frame of the video to other. Now I want to draw a box around moving object and find the coordinates so that I can separate the moving part from the frame. Can anyone help me, How can I do this. Thanks in advance.

Answer 1

[Image Analyst]

It's very similar to my color tracking application. I just put a cross on the region with plot(x,y,'+') whereas you'd put up a box with the rectangle() function. See attached demo.

[Image Analyst]

Also, see this: http://www.mathworks.com/products/computer-vision/features.html#object-tracking-and-motion-estimation