convexity defects coordinates java android

Question

How can access coordinates of convexity defects and convexhull?

I try to do measurment of each finger (on open-palm hand picture) and i would like to get acces to coordinates first five points of convexhull and first four points of convexity defects (counting from the top of an image). To do that, i need to know what the coorginates (x and y) are.

The format od convexhull is MatOfInt and the format of convexityDefects is MatOfInt4. I was looking for answer but unfortunately only answer I found was in C++, and I'm working with java.

I will be very gratefull for any help.

This answer is helpful as well: https://stackoverflow.com/questions/10961660/android-java-opencv-2-4-convexhull-convexdefect — Paulina, Dec 05 '17 at 14:01

score 0 · Answer 1 · answered Jan 18 '14 at 21:43

Have you tried converting your MatOfInt to a List of Point's ?

You can do it like this:

// MatOfInt mat;
List<Point> list1 = mat.toList();   

// Or:
List<Point> list2 = new ArrayList<Point>();

Converters.Mat_to_vector_Point(mat, list2);

You can find more OpenCV Java data structure converters here.

convexity defects coordinates java android

1 Answers1