How to do horizontal and vertical splitting in an image..?

I am working on features extraction for signature verification. Currently,I have done several processes until finding the gravity center point for that signature. What I need to do now is split the signature image into horizontal and vertical splitting consecutively as shown here http://postimg.org/image/o0uawhech/.

1. Split the signature image with horizontal line passing through its geometric center to get top and bottom part of signature.
2. Then, find geometric center for top and bottom part.
3. Divide the top part with vertical line passing through its geometric center to get left and right part.
4. Find the geometric centers for left and right parts of top part correspondingly.

p/s: Similarly, the bottom part is split using same method to obtain ten feature points.

Answer 1

[Image Analyst]

Have you looked at how others have done it here: http://iris.usc.edu/Vision-Notes/bibliography/contentschar.html#OCR,%20Document%20Analysis%20and%20Character%20Recognition%20Systems

Finding the center on a binary image is no problem:

[rows, columns] = find(binaryImage);
meanX = mean(columns);
meanY = mean(rows);