How can I find the longest chord of a region?

3 views (last 30 days)
Hi, I am trying to find out the longest chord of a region. Also, I need to find out the chord that is perpendicular to the longest chord of that region. Thanks in advance.

Accepted Answer

Image Analyst
Image Analyst on 7 Jan 2015
See my attached demo. In the image below, the red line is the line between the two points in the binary (white) blob that are farthest apart. The magenta line is the line cutting across the blob perpendicular to the longest line. Feel free to adapt it.
Image Analyst
Image Analyst on 7 Jan 2015
I didn't find any vertical. I just went around to every point finding the distances to every other point using the Pythagorean formula. If you want the vertical extent, you can just subtract the y values of the end points.

Sign in to comment.

More Answers (0)


Find more on Statistics and Machine Learning Toolbox in Help Center and File Exchange


No tags entered yet.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by