Test3

MATLAB: 0  2  6 13 23  37  54  75 103 133 168 208 from png file
Java:   0 22 42 64 85 106 127 148 170 191 212 233

C:\ece595_06\image>java Test3
file: gray2.png
pixel 0xff000000 0
java.awt.Color[r=0,g=0,b=0]
pixel 0xff161616 22
java.awt.Color[r=22,g=22,b=22]
pixel 0xff2a2a2a 42
java.awt.Color[r=42,g=42,b=42]
pixel 0xff404040 64
java.awt.Color[r=64,g=64,b=64]
pixel 0xff555555 85
java.awt.Color[r=85,g=85,b=85]
pixel 0xff6a6a6a 106
java.awt.Color[r=106,g=106,b=106]
pixel 0xff7f7f7f 127
java.awt.Color[r=127,g=127,b=127]
pixel 0xff949494 148
java.awt.Color[r=148,g=148,b=148]
pixel 0xffaaaaaa 170
java.awt.Color[r=170,g=170,b=170]
pixel 0xffbfbfbf 191
java.awt.Color[r=191,g=191,b=191]
pixel 0xffd4d4d4 212
java.awt.Color[r=212,g=212,b=212]
pixel 0xffe9e9e9 233
java.awt.Color[r=233,g=233,b=233]

Test3.java

import java.awt.*;
import java.awt.image.*;
import java.awt.color.*;
import java.io.*;
import javax.imageio.*;
import javax.swing.JFrame;


public class Test3 {

    public static void main(String[] args) {

	String filename = "gray2.png";
	if (args.length>0) filename = args[0];
	System.out.println("file: " + filename);

	showImage f1 = new showImage(filename);
	f1.setLocation(100,100);
	f1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

	int w = 30;
	int p;
	Color c;
	for (int n=0; n<12; n++) {
		p = f1.img.getRGB(15+w*n,60);
		c = new Color(p);
		System.out.format("pixel 0x%x %d %n",p, p&0xFF);		
		System.out.println(c);
	}
   }
}

Maintained by John Loomis, updated Thu Oct 10 11:53:57 2013