Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import android.graphics.Bitmap;

public class Main {

    public static double GX(int x, int y, Bitmap bitmap) {
        double res = (-1) * getPixel(x - 1, y - 1, bitmap) + 1 * getPixel(x + 1, y - 1, bitmap)
                + (-Math.sqrt(2)) * getPixel(x - 1, y, bitmap) + Math.sqrt(2) * getPixel(x + 1, y, bitmap)
                + (-1) * getPixel(x - 1, y + 1, bitmap) + 1 * getPixel(x + 1, y + 1, bitmap);
        return res;
    }

    public static double getPixel(int x, int y, Bitmap bitmap) {
        if (x < 0 || x >= bitmap.getWidth() || y < 0 || y >= bitmap.getHeight())
            return 0;
        return bitmap.getPixel(x, y);
    }
}