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imageReader.java
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imageReader.java
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//Tzang, Tsung-Ting
//Student ID 4870930866
import java.awt.*;
import java.awt.image.*;
import java.io.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.lang.*;
public class imageReader {
public static void main(String[] args) {
Scanner scan = new Scanner( System.in );
int Qlevel = 0;
int Mode = 0;
int Latency = 0;
String fileName = "image1.rgb";//Default
printInfo(1);
while( true ){
System.out.print( "Please Enter Quantization Level(0~7)$ " );
Qlevel = Integer.parseInt(scan.nextLine());
if( Qlevel >= 0 && Qlevel <= 7 ) break;
}
printInfo(2);
while( true ){
System.out.print( "Please Enter which Mode(1~3)$ " );
Mode = Integer.parseInt(scan.nextLine());
if( Mode >= 0 && Mode <= 3 ) break;
}
printInfo(3);
while( true ){
System.out.print( "Please Enter Latency$ " );
Latency = Integer.parseInt(scan.nextLine());
if( Latency >= 0 ) break;
}
int width = 352;//Integer.parseInt(args[1]);
int height = 288;//Integer.parseInt(args[2]);
BufferedImage imgTest = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
// Use a label to display the image
JFrame frame = new JFrame("Assignment II");
JLabel label = new JLabel(new ImageIcon(img), JLabel.CENTER);
Dimension screenSize = new Dimension(Toolkit.getDefaultToolkit().getScreenSize());
int window_X = screenSize.width / 4 ;
int window_Y = screenSize.height / 4;
frame.getContentPane().add(label, BorderLayout.CENTER);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent windowEvent){
System.exit(0);
}
});
frame.pack();
frame.setLocation(window_X, window_Y);
frame.setVisible(true);
try {
File file = new File(fileName);
InputStream is = new FileInputStream(file);
long len = file.length();
byte[] bytes_R = new byte[(int)len];
Byte[] bytes = new Byte[(int)len];
int[][] tmpPixel_Oringin = new int[height][width];
int[][] Pixel_Compression = new int[height][width];
int[][][] RGB_Origin = new int[height][width][3];
double[][][][][] RGB_Blocks = new double[height/8][width/8][8][8][3];
int[][][][][] RGB_FeqBlocks = new int[height/8][width/8][8][8][3];
int[][][][][] RGB_QuantizeB = new int[height/8][width/8][8][8][3];
int[][][][][] RGB_DQuantizeB = new int[height/8][width/8][8][8][3];
int[][][][][] RGB_ItnBlocks = new int[height/8][width/8][8][8][3];
int[][][][][] RGB_ZigBlocks = new int[height/8][width/8][8][8][3];
int[][][][] Pixel_AfterCompression = new int[height/8][width/8][8][8];
byte[][][][][] RGB_DeItnBlocks = new byte[height/8][width/8][8][8][3];
double[][][][][] RGB_tmpBlocks = new double[height/8][width/8][8][8][3];
int offset = 0;
int numRead = 0;
while (offset < bytes_R.length && (numRead=is.read(bytes_R, offset, bytes_R.length-offset)) >= 0) {
offset += numRead;
}
for(int i = 0; i < (int)len; i++) bytes[i] = bytes_R[i];
//Load Oringinal
LoadImage( RGB_Origin, bytes, tmpPixel_Oringin, height, width );
//Break into 8x8 blocks
Partition( RGB_Origin, RGB_Blocks, height, width );
//DCT
DCT( RGB_Blocks, RGB_tmpBlocks, RGB_FeqBlocks, height, width );
//Quantize
Quantize( RGB_QuantizeB, RGB_FeqBlocks, Qlevel, height, width );
//DeQuantize
DeQuantize( RGB_DQuantizeB, RGB_QuantizeB, Qlevel, height, width );
//
switch( Mode ){
case 1:
//IDCT
IDCT( RGB_DeItnBlocks, RGB_ItnBlocks, RGB_DQuantizeB,
RGB_tmpBlocks, Pixel_AfterCompression, img, height, width, Mode);
//Mode I display
for(int i = 0; i < height/8; i++){
for(int j = 0; j < width/8; j++){
for(int y = 0; y < 8; y++){
for(int x = 0; x < 8; x++){
byte RR = (RGB_DeItnBlocks[i][j][y][x][0] );
byte GG = (RGB_DeItnBlocks[i][j][y][x][1] );
byte BB = (RGB_DeItnBlocks[i][j][y][x][2] );
Pixel_AfterCompression[i][j][y][x] = 0xff000000
| ((RR & 0xff) << 16) | ((GG & 0xff) << 8) | (BB & 0xff);
img.setRGB(j*8+x, i*8+y, Pixel_AfterCompression[i][j][y][x]);
}
}
label.repaint();
Thread.sleep(Latency);
}
}
break;
case 2:
int col = 1, row = 1;
for( int zigzag = 0; zigzag < 8*8; zigzag ++ ){
for(int i = 0; i < height/8; i++){
for(int j = 0; j < width/8; j++){
//Get DC AC1 AC2...
RGB_ZigBlocks[i][j][row-1][col-1][0] = RGB_DQuantizeB[i][j][row-1][col-1][0];
RGB_ZigBlocks[i][j][row-1][col-1][1] = RGB_DQuantizeB[i][j][row-1][col-1][1];
RGB_ZigBlocks[i][j][row-1][col-1][2] = RGB_DQuantizeB[i][j][row-1][col-1][2];
}
}
//IDCT
IDCT( RGB_DeItnBlocks, RGB_ItnBlocks, RGB_ZigBlocks,
RGB_tmpBlocks, Pixel_AfterCompression, img, height, width, Mode );
label.repaint();
Thread.sleep(Latency);
//Get Next Coeffecient
if( (row+col)%2 == 0 ){ //even
if( col < 8 ) col++;
else row+=2;
if( row > 1 ) row--;
}
else{
if( row < 8 ) row++;
else col+=2;
if( col > 1 ) col--;
}
}
break;
case 3:
//IDCT
IDCT( RGB_DeItnBlocks, RGB_ItnBlocks, RGB_DQuantizeB,
RGB_tmpBlocks, Pixel_AfterCompression, img, height, width, Mode);
//Mode III Display
int mask = 0x80;
for( int countBits = 0; countBits < 8; countBits++ ){
for(int i = 0; i < height/8; i++){
for(int j = 0; j < width/8; j++){
for(int y = 0; y < 8; y++){
for(int x = 0; x < 8; x++){
byte RR = (RGB_DeItnBlocks[i][j][y][x][0] );
byte GG = (RGB_DeItnBlocks[i][j][y][x][1] );
byte BB = (RGB_DeItnBlocks[i][j][y][x][2] );
Pixel_AfterCompression[i][j][y][x] = 0xff000000 | (((RR & 0xff & mask)) << 16)
| (((GG & 0xff & mask)) << 8)
| (((BB & 0xff & mask)));
img.setRGB(j*8+x, i*8+y, Pixel_AfterCompression[i][j][y][x]);
}
}
}
}
label.repaint();
Thread.sleep(Latency);
mask = (mask >> 1) | 0x80;
}
//End bits countin
break;
default:
break;
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch( Exception e ){
e.printStackTrace();
}
}
private static void printInfo( int option ){
if( option == 1 ){
System.out.println("-------------------------------------------------------");
System.out.println(" A factor that will increase or decrease compression");
System.out.println("-------------------------------------------------------");
return;
}
if( option == 2 ){
System.out.println("---------------------------------------------------------");
System.out.println(" Mode 1: Base Line Delivery - Sequential");
System.out.println(" Mode 2: Progressive Delivery - Spectral Selection");
System.out.println(" Mode 3: Progressive Delivery - Succesive Bit Approx.");
System.out.println("---------------------------------------------------------");
return;
}
if( option == 3 ){
System.out.println("---------------------------------------------------------");
System.out.println(" Simulate low and high bandwidth in milliseconds");
System.out.println("---------------------------------------------------------");
return;
}
}
private static void LoadImage( int[][][] RGB_Origin, Byte[] bytes, int[][] tmpPixel_Oringin, int height, int width ){
int index = 0;
for(int y = 0; y < height; y++){
for(int x = 0; x < width; x++){
byte a = 0;
byte r = bytes[index];
byte g = bytes[index+height*width];
byte b = bytes[index+height*width*2];
RGB_Origin[y][x][0] = 0x00000000 | (r & 0xff);
RGB_Origin[y][x][1] = 0x00000000 | (g & 0xff);
RGB_Origin[y][x][2] = 0x00000000 | (b & 0xff);
int pix = 0xff000000 | ((r & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff);
//int pix = ((a << 24) + (r << 16) + (g << 8) + b);
tmpPixel_Oringin[y][x] = pix;
//img.setRGB(x,y,pix);
index++;
}
}
}
private static void Partition( int[][][] RGB_Origin, double[][][][][] RGB_Blocks, int height, int width ){
for(int i = 0; i < height; i+=8){
for(int j = 0; j < width; j+=8){
int x=0, y=0;
for(y=0; y<8; y++){
for(x=0; x<8; x++){
RGB_Blocks[i/8][j/8][y][x][0] = RGB_Origin[i+y][j+x][0];
RGB_Blocks[i/8][j/8][y][x][1] = RGB_Origin[i+y][j+x][1];
RGB_Blocks[i/8][j/8][y][x][2] = RGB_Origin[i+y][j+x][2];
}
}
}
}
}
private static void DCT( double[][][][][] RGB_Blocks,
double[][][][][] RGB_tmpBlocks,
int[][][][][] RGB_FeqBlocks, int height, int width ){
for(int i = 0; i < height/8; i++){
for(int j = 0; j < width/8; j++){
double Cu=0, Cv=0;
for(int v = 0; v < 8; v++){
if( v == 0 )
Cv = 1/Math.sqrt(2.0);
else
Cv = 1;
for(int u = 0; u < 8; u++){
RGB_tmpBlocks[i][j][v][u][0] = 0;
RGB_tmpBlocks[i][j][v][u][1] = 0;
RGB_tmpBlocks[i][j][v][u][2] = 0;
//Formula
for(int y = 0; y < 8; y++){
double COSYV = Math.cos(((2.0*y+1.0)*v*Math.PI)/16.0);
for(int x = 0; x < 8; x++){
double COSXU = Math.cos(((2.0*x+1.0)*u*Math.PI)/16.0);
if( u == 0 )
Cu = 1/Math.sqrt(2.0);
else
Cu = 1;
RGB_tmpBlocks[i][j][v][u][0] += (1.0/4.0) * Cu * Cv *
(RGB_Blocks[i][j][y][x][0]) * COSXU * COSYV;
RGB_tmpBlocks[i][j][v][u][1] += (1.0/4.0) * Cu * Cv *
(RGB_Blocks[i][j][y][x][1]) * COSXU * COSYV;
RGB_tmpBlocks[i][j][v][u][2] += (1.0/4.0) * Cu * Cv *
(RGB_Blocks[i][j][y][x][2]) * COSXU * COSYV;
}
}
RGB_FeqBlocks[i][j][v][u][0] = (int)Math.round( RGB_tmpBlocks[i][j][v][u][0] );
RGB_FeqBlocks[i][j][v][u][1] = (int)Math.round( RGB_tmpBlocks[i][j][v][u][1] );
RGB_FeqBlocks[i][j][v][u][2] = (int)Math.round( RGB_tmpBlocks[i][j][v][u][2] );
}
}
}
}
}
private static void Quantize( int[][][][][] RGB_QuantizeB,
int[][][][][] RGB_FeqBlocks, int Qlevel, int height, int width ){
for(int i = 0; i < height/8; i++){
for(int j = 0; j < width/8; j++){
for(int v = 0; v < 8; v++){
for(int u = 0; u < 8; u++){
RGB_QuantizeB[i][j][v][u][0] = (int)Math.round( RGB_FeqBlocks[i][j][v][u][0] / Math.pow(2, Qlevel) );
RGB_QuantizeB[i][j][v][u][1] = (int)Math.round( RGB_FeqBlocks[i][j][v][u][1] / Math.pow(2, Qlevel) );
RGB_QuantizeB[i][j][v][u][2] = (int)Math.round( RGB_FeqBlocks[i][j][v][u][2] / Math.pow(2, Qlevel) );
}
}
}
}
}
private static void DeQuantize( int[][][][][] RGB_DQuantizeB,
int[][][][][] RGB_QuantizeB, int Qlevel, int height, int width ){
for(int i = 0; i < height/8; i++ ){
for(int j = 0; j < width/8; j++){
for(int v = 0; v < 8; v++){
for(int u = 0; u < 8; u++){
RGB_DQuantizeB[i][j][v][u][0] = (int)(RGB_QuantizeB[i][j][v][u][0] * Math.pow(2, Qlevel));
RGB_DQuantizeB[i][j][v][u][1] = (int)(RGB_QuantizeB[i][j][v][u][1] * Math.pow(2, Qlevel));
RGB_DQuantizeB[i][j][v][u][2] = (int)(RGB_QuantizeB[i][j][v][u][2] * Math.pow(2, Qlevel));
}
}
}
}
}
private static void IDCT( byte[][][][][] RGB_DeItnBlocks,
int[][][][][] RGB_ItnBlocks,
int[][][][][] RGB_DQuantizeB,
double[][][][][] RGB_tmpBlocks,
int[][][][] Pixel_AfterCompression,
BufferedImage img, int height, int width, int mode ){
for(int i = 0; i < height/8; i++){
for(int j = 0; j < width/8; j++){
for(int y = 0; y < 8; y++){
for(int x = 0; x < 8; x++){
RGB_tmpBlocks[i][j][y][x][0] = 0;
RGB_tmpBlocks[i][j][y][x][1] = 0;
RGB_tmpBlocks[i][j][y][x][2] = 0;
//Formula
double Cv = 0; double Cu = 0;
for(int v = 0; v < 8; v++){
double COSYV = Math.cos(((2.0*y+1.0)*v*Math.PI)/16.0);
if( v == 0 )
Cv = 1/Math.sqrt(2.0);
else
Cv = 1;
for(int u = 0; u < 8; u++){
double COSXU = Math.cos(((2.0*x+1.0)*u*Math.PI)/16.0);
if( u == 0 )
Cu = 1/Math.sqrt(2.0);
else
Cu = 1;
RGB_tmpBlocks[i][j][y][x][0] += (1.0/4.0) * Cu * Cv *
RGB_DQuantizeB[i][j][v][u][0] * COSXU * COSYV;
RGB_tmpBlocks[i][j][y][x][1] += (1.0/4.0) * Cu * Cv *
RGB_DQuantizeB[i][j][v][u][1] * COSXU * COSYV;
RGB_tmpBlocks[i][j][y][x][2] += (1.0/4.0) * Cu * Cv *
RGB_DQuantizeB[i][j][v][u][2] * COSXU * COSYV;
}
}
RGB_ItnBlocks[i][j][y][x][0] = (int)( RGB_tmpBlocks[i][j][y][x][0] );
RGB_ItnBlocks[i][j][y][x][1] = (int)( RGB_tmpBlocks[i][j][y][x][1] );
RGB_ItnBlocks[i][j][y][x][2] = (int)( RGB_tmpBlocks[i][j][y][x][2] );
if( RGB_ItnBlocks[i][j][y][x][0] < 0 ) RGB_ItnBlocks[i][j][y][x][0] = 0;
if( RGB_ItnBlocks[i][j][y][x][1] < 0 ) RGB_ItnBlocks[i][j][y][x][1] = 0;
if( RGB_ItnBlocks[i][j][y][x][2] < 0 ) RGB_ItnBlocks[i][j][y][x][2] = 0;
if( RGB_ItnBlocks[i][j][y][x][0] > 255 ) RGB_ItnBlocks[i][j][y][x][0] = 255;
if( RGB_ItnBlocks[i][j][y][x][1] > 255 ) RGB_ItnBlocks[i][j][y][x][1] = 255;
if( RGB_ItnBlocks[i][j][y][x][2] > 255 ) RGB_ItnBlocks[i][j][y][x][2] = 255;
RGB_DeItnBlocks[i][j][y][x][0] = (byte)( RGB_ItnBlocks[i][j][y][x][0] );
RGB_DeItnBlocks[i][j][y][x][1] = (byte)( RGB_ItnBlocks[i][j][y][x][1] );
RGB_DeItnBlocks[i][j][y][x][2] = (byte)( RGB_ItnBlocks[i][j][y][x][2] );
if( mode == 2 ){
byte RR = (RGB_DeItnBlocks[i][j][y][x][0] );
byte GG = (RGB_DeItnBlocks[i][j][y][x][1] );
byte BB = (RGB_DeItnBlocks[i][j][y][x][2] );
Pixel_AfterCompression[i][j][y][x] = 0xff000000
| ((RR & 0xff) << 16) | ((GG & 0xff) << 8) | (BB & 0xff);
img.setRGB(j*8+x, i*8+y, Pixel_AfterCompression[i][j][y][x]);
}
}
}
}
}
}
}