Java tutorial
//-----------------------------------------------------------------------//
// //
// T e s t I m a g e 3 //
// //
// Copyright (C) Herve Bitteur 2000-2007. All rights reserved. //
// This software is released under the terms of the GNU General Public //
// License. Please contact the author at herve.bitteur@laposte.net //
// to report bugs & suggestions. //
//-----------------------------------------------------------------------//
package omr.jai;
import omr.jai.ImageInfo;
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.color.ColorSpace;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.DataBuffer;
import java.awt.image.Raster;
import java.awt.image.RenderedImage;
import java.awt.image.renderable.ParameterBlock;
import javax.media.jai.JAI;
import javax.media.jai.PlanarImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.util.Arrays;
import javax.media.jai.InterpolationNearest;
import javax.media.jai.InterpolationBilinear;
public class TestImage3
extends JPanel
{
//RenderedImage image;
PlanarImage image;
// Affine tranform
final float ratio = 4f;
AffineTransform scaleXform = AffineTransform.getScaleInstance(ratio, ratio);
private static char WHITE = '-'; // And transparent
private static char[] charTable = new char[]
{
'#', // 0 Black
'$', // 1
'*', // 2
'0', // 3
'o', // 4
'+', // 5
'.', // 6
WHITE // 7
};
//------------//
// TestImage3 //
//------------//
public TestImage3()
{
JFrame frame = new JFrame(getClass().getName());
Container pane = frame.getContentPane();
pane.setLayout(new BorderLayout());
pane.add(this);
image = decodeImage(new String[] {
"#-###############",
"-----------------",
"#################",
"-----------------",
"#################",
"-----------------",
"#################",
"-----------------",
"#################",
"-----------------",
"#################",
"-----------------",
"-----------------",
"-----------------",
"---####----------",
"-------##--------",
"---------####----",
"-------------#---",
"-------------#---",
"-----------------",
"--#############--",
"--#############--",
"--#############--",
"--#############--",
"--#############--",
"--#############--",
"--#############--",
"--#############--",
"--#############--",
"--#############--",
"--#############--",
"-----------------",
"-----------------",
"---####----------",
"-------##--------",
"---------####----",
"-------------#---",
"-------------#---",
"-----------------",
"--#############--",
"--#############--",
"-----------------",
"-----------------"
});
// checkImageFormat();
ImageInfo.print(image);
// Scaling
final float scale = 1f;
ParameterBlock pb = new ParameterBlock()
.addSource(image)
.add(scale)
.add(scale)
.add(0f)
.add(0f)
.add(new InterpolationNearest());
image = JAI.create("scale", pb);
dumpPixels(0, 0, 5, 7);
if (false) {
System.out.println("\nBand Selection");
image = JAI.create("bandselect",image,new int[] {0, 1, 2});
ImageInfo.print(image);
dumpPixels(0, 0, 5, 7);
}
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocation(100, 100);
frame.pack();
frame.setSize(100, 250);
frame.setVisible(true);
}
private void dumpPixels (int x0,
int y0,
int w,
int h)
{
Raster raster = image.getData();
int[] pixel = null;
System.out.print("pixels=");
for (int y = y0; y < y0+h; y++) {
System.out.println();
for (int x = x0; x <= x0+w; x++) {
pixel = raster.getPixel(x, y, pixel);
System.out.print(" [");
for (int i = 0; i < pixel.length; i++) {
System.out.print(String.format("%3x", pixel[i]));
}
System.out.print("]");
}
}
System.out.println();
}
//------//
// main //
//------//
public static void main(String... args)
{
new TestImage3();
}
//----------------//
// paintComponent //
//----------------//
public void paintComponent(Graphics g)
{
// For background
super.paintComponent(g);
// Meant for visual check
if (image != null) {
Graphics2D g2 = (Graphics2D) g;
g2.drawRenderedImage (image, scaleXform);
//g2.drawImage (image, 1, 1, this);
}
}
//-------------//
// decodeImage //
//-------------//
public static PlanarImage decodeImage (String[] rows)
{
// Create the DataBuffer to hold the pixel samples
final int width = rows[0].length();
final int height = rows.length;
// Create Raster
Raster raster;
if (true) {
raster = Raster.createPackedRaster
(DataBuffer.TYPE_INT, width, height,
new int[] {0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000},// bandMasks RGBA
null);
} else {
raster = Raster.createInterleavedRaster
(DataBuffer.TYPE_BYTE, width, height,
4,// num of bands
null);
}
// Populate the data buffer
DataBuffer dataBuffer = raster.getDataBuffer();
int index = 0;
for (String row : rows) {
for (int x = 0; x < width; x++) {
int argb = toARGB(row.charAt(x));
dataBuffer.setElem(index, argb);
index++;
}
}
// Dump
// final int size = width * height;
// System.out.println("DataBuffer :");
// for (int i = 0; i < size; i++) {
// if (i % width == 0) {
// System.out.println();
// }
// System.out.print(String.format("%8x ", dataBuffer.getElem(i)));
// }
// System.out.println();
// Create the image
BufferedImage bufferedImage = new BufferedImage
(width, height, BufferedImage.TYPE_INT_ARGB);
bufferedImage.setData(raster);
// Dump
// System.out.println("BufferedImage :");
// for (int y = 0; y < height; y++) {
// System.out.println();
// for (int x = 0; x < width; x++) {
// System.out.print(String.format("%8x ", bufferedImage.getRGB(x, y)));
// }
// }
// System.out.println();
return PlanarImage.wrapRenderedImage(bufferedImage);
}
//--------//
// toARGB //
//--------//
/**
* Compute the ARGB pixel that corresponds to the given char
*
* @param c the char
* @return the corresponding pixel value (ARGB format)
*/
private static int toARGB (char c)
{
// Check the char
if (c == WHITE) {
return 0x00ffffff; // Totally transparent / white
} else {
for (int i = charTable.length -1; i >= 0; i--) {
if (charTable[i] == c) {
int level = 3 + i * 36; // Range 3 .. 255 (not too bad)
return
255 << 24 | // Alpha (opaque)
level << 16 | // R
level << 8 | // G
level; // B
}
}
}
return 0x00ffffff; // Totally transparent / white
}
//------------------//
// checkImageFormat //
//------------------//
/**
* Check if the image format (and especially its color model) is
* properly handled by Audiveris.
*
* @throws ImageFormatException is the format is not supported
*/
private void checkImageFormat()
{
// Check nb of bands
int numBands = image.getSampleModel().getNumBands();
if (numBands != 1) {
if (numBands == 3) {
image = colorToGray(image);
} else {
throw new RuntimeException
("Unsupported sample model" +
" numBands=" + numBands);
}
}
// Check pixel size
ColorModel colorModel = image.getColorModel();
int pixelSize = colorModel.getPixelSize();
if (pixelSize != 8) {
System.out.println("pixelSize=" + pixelSize +
" colorModel=" + colorModel);
image = grayToGray256(image);
}
}
//--------//
// invert //
//--------//
private static PlanarImage invert (PlanarImage image)
{
return JAI.create("Invert",
new ParameterBlock()
.addSource(image)
.add(null)
.add(null)
.add(null)
.add(null)
.add(null),
null);
}
//-------------//
// colorToGray //
//-------------//
private static PlanarImage colorToGray (PlanarImage image)
{
System.out.println("Converting color image to gray ...");
double[][] matrix = { {0.114d, 0.587d, 0.299d, 0.0d} };
return JAI.create("bandcombine",
new ParameterBlock()
.addSource(image)
.add(matrix),
null);
}
//---------------//
// grayToGray256 //
//---------------//
private static PlanarImage grayToGray256 (PlanarImage image)
{
System.out.println("Converting gray image to gray-256 ...");
ColorSpace colorSpace = ColorSpace.getInstance
(java.awt.color.ColorSpace.CS_GRAY);
// int[] bits = new int[]{8};
// int opaque = Transparency.OPAQUE;
// int dataType = DataBuffer.TYPE_BYTE;
// ColorModel colorModel = new ComponentColorModel
// (colorSpace, bits, false, false, opaque, dataType);
return JAI.create("colorConvert", image, colorSpace, null);
}
}
//-----------------------------------------------------------------------//
////
//I m a g e I n f o //
////
//Copyright (C) Herve Bitteur 2000-2007. All rights reserved. //
//This software is released under the terms of the GNU General Public //
//License. Please contact the author at herve.bitteur@laposte.net //
//to report bugs & suggestions. //
//-----------------------------------------------------------------------//
import java.awt.Transparency;
import java.awt.image.*;
import java.io.File;
import javax.media.jai.*;
public class ImageInfo {
public static void main(String[] args) {
// Open the image (using the name passed as a command line parameter)
PlanarImage pi = JAI.create("fileload", args[0]);
// Get the image file size (non-JAI related).
File image = new File(args[0]);
System.out.println("Image file size: " + image.length() + " bytes.");
print(pi);
}
public static void print(PlanarImage pi) {
// Show the image dimensions and coordinates.
System.out.print("Image Dimensions: ");
System.out.print(pi.getWidth() + "x" + pi.getHeight() + " pixels");
// Remember getMaxX and getMaxY return the coordinate of the next point!
System.out.println(" (from " + pi.getMinX() + "," + pi.getMinY() + " to " + (pi.getMaxX() - 1) + ","
+ (pi.getMaxY() - 1) + ")");
if ((pi.getNumXTiles() != 1) || (pi.getNumYTiles() != 1)) { // Is it tiled?
// Tiles number, dimensions and coordinates.
System.out.print("Tiles: ");
System.out.print(pi.getTileWidth() + "x" + pi.getTileHeight() + " pixels" + " (" + pi.getNumXTiles()
+ "x" + pi.getNumYTiles() + " tiles)");
System.out.print(" (from " + pi.getMinTileX() + "," + pi.getMinTileY() + " to " + pi.getMaxTileX() + ","
+ pi.getMaxTileY() + ")");
System.out.println(" offset: " + pi.getTileGridXOffset() + "," + pi.getTileGridXOffset());
}
// Display info about the SampleModel of the image.
SampleModel sm = pi.getSampleModel();
System.out.println("Number of bands: " + sm.getNumBands());
System.out.print("Data type: ");
switch (sm.getDataType()) {
case DataBuffer.TYPE_BYTE:
System.out.println("byte");
break;
case DataBuffer.TYPE_SHORT:
System.out.println("short");
break;
case DataBuffer.TYPE_USHORT:
System.out.println("ushort");
break;
case DataBuffer.TYPE_INT:
System.out.println("int");
break;
case DataBuffer.TYPE_FLOAT:
System.out.println("float");
break;
case DataBuffer.TYPE_DOUBLE:
System.out.println("double");
break;
case DataBuffer.TYPE_UNDEFINED:
System.out.println("undefined");
break;
}
// Display info about the ColorModel of the image.
ColorModel cm = pi.getColorModel();
if (cm != null) {
System.out.println("Number of color components: " + cm.getNumComponents());
System.out.println("Bits per pixel: " + cm.getPixelSize());
System.out.print("Image Transparency: ");
switch (cm.getTransparency()) {
case Transparency.OPAQUE:
System.out.println("opaque");
break;
case Transparency.BITMASK:
System.out.println("bitmask");
break;
case Transparency.TRANSLUCENT:
System.out.println("translucent");
break;
}
} else
System.out.println("No color model.");
}
}