Image intensity profile analysis to locate the zero clusters of a gray image.

Hi Ashvin, thanks for your reply. But I am trying to trace the intensity profile of an image to locate the region of my interest(which is the vertebrae). How do I write a function to locate the zero clusters of the profile to mark the point.

[Image Analyst]

Who's Ashvin? Do you want answers from only him? What is a "zero cluster"?

[Evan]

It looks like Josh meant to reply to this answer on his question thread: http://www.mathworks.com/matlabcentral/answers/79982-marking-line-point-on-image-and-intensity-profile#answer_89786

Josh, if you want to reply to Ashvin, follow that link and, below his answer, click the button that reads "Comment on this Answer."