有3个选项:(编辑 ->:至少在你编辑问题之前,这里已经有3个选项了 <-)
- 您可以垂直翻转图像
- 您可以旋转图像
- 您可以反转图像
下图显示了它们的区别:
![ImageFlipTest01.png](https://istack.dev59.com/BaCwv.webp)
根据您发布的图片,我假设您想要垂直翻转图像。这可以逐像素进行,或者(当需要高效处理时)使用AffineTransformOp
或通过使用转换的Graphics2D
直接绘制图像来完成。
import java.awt.Component;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.RenderingHints;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.awt.image.ByteLookupTable;
import java.awt.image.LookupOp;
import java.awt.image.LookupTable;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import javax.imageio.ImageIO;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class ImageFlipTest
{
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Runnable()
{
@Override
public void run()
{
createAndShowGUI();
}
});
}
private static void createAndShowGUI()
{
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(new GridLayout(1, 1));
BufferedImage image = null;
try
{
image = convertToARGB(ImageIO.read(new File("lena512color.png")));
}
catch (IOException e1)
{
e1.printStackTrace();
}
JPanel panel = new JPanel(new GridLayout(2,2));
panel.add(createComponent("Original", image));
panel.add(createComponent("Flipped", createFlipped(image)));
panel.add(createComponent("Rotated", createRotated(image)));
panel.add(createComponent("Inverted", createInverted(image)));
frame.getContentPane().add(panel);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private static BufferedImage convertToARGB(BufferedImage image)
{
BufferedImage newImage = new BufferedImage(
image.getWidth(), image.getHeight(),
BufferedImage.TYPE_INT_ARGB);
Graphics2D g = newImage.createGraphics();
g.drawImage(image, 0, 0, null);
g.dispose();
return newImage;
}
private static BufferedImage createFlipped(BufferedImage image)
{
AffineTransform at = new AffineTransform();
at.concatenate(AffineTransform.getScaleInstance(1, -1));
at.concatenate(AffineTransform.getTranslateInstance(0, -image.getHeight()));
return createTransformed(image, at);
}
private static BufferedImage createRotated(BufferedImage image)
{
AffineTransform at = AffineTransform.getRotateInstance(
Math.PI, image.getWidth()/2, image.getHeight()/2.0);
return createTransformed(image, at);
}
private static BufferedImage createTransformed(
BufferedImage image, AffineTransform at)
{
BufferedImage newImage = new BufferedImage(
image.getWidth(), image.getHeight(),
BufferedImage.TYPE_INT_ARGB);
Graphics2D g = newImage.createGraphics();
g.transform(at);
g.drawImage(image, 0, 0, null);
g.dispose();
return newImage;
}
private static BufferedImage createInverted(BufferedImage image)
{
if (image.getType() != BufferedImage.TYPE_INT_ARGB)
{
image = convertToARGB(image);
}
LookupTable lookup = new LookupTable(0, 4)
{
@Override
public int[] lookupPixel(int[] src, int[] dest)
{
dest[0] = (int)(255-src[0]);
dest[1] = (int)(255-src[1]);
dest[2] = (int)(255-src[2]);
return dest;
}
};
LookupOp op = new LookupOp(lookup, new RenderingHints(null));
return op.filter(image, null);
}
private static Component createComponent(
String title, BufferedImage image)
{
JLabel label = new JLabel(new ImageIcon(image));
JPanel panel = new JPanel(new GridLayout(1,1));
panel.add(label);
panel.setBorder(BorderFactory.createTitledBorder(title));
return panel;
}
}
SampleModel
。但这与颜色空间无关,两种情况下都是RGB。 - Harald K