java 黑白图片_如何使用Java将图像转换为黑白图像

我想这取决于你所说的“mono-chrome”/“black& white”……

public class TestBlackAndWhite {

public static void main(String[] args) {

new TestBlackAndWhite();

}

public TestBlackAndWhite() {

EventQueue.invokeLater(new Runnable() {

@Override

public void run() {

try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

} catch (Exception ex) {

}

JFrame frame = new JFrame("Test");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.add(new TestPane());

frame.pack();

frame.setLocationRelativeTo(null);

frame.setVisible(true);

}

});

}

public class TestPane extends JPanel {

private BufferedImage master;

private BufferedImage grayScale;

private BufferedImage blackWhite;

public TestPane() {

try {

master = ImageIO.read(new File("C:/Users/shane/Dropbox/pictures/439px-Join!_It's_your_duty!.jpg"));

grayScale = ImageIO.read(new File("C:/Users/shane/Dropbox/pictures/439px-Join!_It's_your_duty!.jpg"));

ColorConvertOp op = new ColorConvertOp(ColorSpace.getInstance(ColorSpace.CS_GRAY), null);

op.filter(grayScale, grayScale);

blackWhite = new BufferedImage(master.getWidth(), master.getHeight(), BufferedImage.TYPE_BYTE_BINARY);

Graphics2D g2d = blackWhite.createGraphics();

g2d.drawImage(master, 0, 0, this);

g2d.dispose();

} catch (IOException ex) {

ex.printStackTrace();

}

}

@Override

public Dimension getPreferredSize() {

Dimension size = super.getPreferredSize();

if (master != null) {

size = new Dimension(master.getWidth() * 3, master.getHeight());

}

return size;

}

@Override

protected void paintComponent(Graphics g) {

super.paintComponent(g);

if (master != null) {

int x = (getWidth() - (master.getWidth() * 3)) / 2;

int y = (getHeight() - master.getHeight()) / 2;

g.drawImage(master, x, y, this);

x += master.getWidth();

g.drawImage(grayScale, x, y, this);

x += master.getWidth();

g.drawImage(blackWhite, x, y, this);

}

}

}

}