Android Int Array Mean getMean(int[] data)

Description

get Mean

Declaration

public static int getMean(int[] data) 

Method Source Code

//package com.java2s;

public class Main {
    public static int getMean(int[] data) {
        // C. A. Glasbey,
        // "An analysis of histogram-based thresholding algorithms,"
        // CVGIP: Graphical Models and Image Processing, vol. 55, pp. 532-537,
        // 1993./*from   w  w  w.ja  v a  2  s.com*/
        //
        // The threshold is the mean of the greyscale data
        int threshold = -1;
        double tot = 0, sum = 0;
        for (int i = 0; i < 256; i++) {
            tot += data[i];
            sum += (i * data[i]);
        }
        threshold = (int) Math.floor(sum / tot);
        return threshold;
    }
}