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[英]Error while converting image to byte[] in Java using WritableRaster and DataBufferByte.
[英]Java: using WritableRaster.setRect to superimpose an image?
我一直在使用Java中的某些成像功能,試圖將一個圖像疊加到另一個圖像上。 像這樣:
BufferedImage background = javax.imageio.ImageIO.read(
new ByteArrayInputStream(getDataFromUrl(
"https://www.google.com/intl/en_ALL/images/logo.gif"
))
);
BufferedImage foreground = javax.imageio.ImageIO.read(
new ByteArrayInputStream(getDataFromUrl(
"https://upload.wikimedia.org/wikipedia/commons/e/e2/Sunflower_as_gif_small.gif"
))
);
WritableRaster backgroundRaster = background.getRaster();
Raster foregroundRaster = foreground.getRaster();
backgroundRaster.setRect(foregroundRaster);
基本上,我嘗試將其疊加: https : //upload.wikimedia.org/wikipedia/commons/e/e2/Sun2/Sunflower_as_gif_small.gif
對此: https : //www.google.com/intl/zh_CN/images/logo.gif
該產品顯示為: http : //imgur.com/xnpfp.png
從我看到的示例來看,這似乎是適當的方法。 我錯過了一步嗎? 有沒有更好的方法來解決這個問題? 謝謝你的回復。
似乎我正在以所有錯誤的方式進行操作。 Sun論壇上概述的此解決方案非常有效(在此處復制):
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.*;
class TwoBecomeOne {
public static void main(String[] args) throws IOException {
BufferedImage large = ImageIO.read(new File("images/tiger.jpg"));
BufferedImage small = ImageIO.read(new File("images/bclynx.jpg"));
int w = large.getWidth();
int h = large.getHeight();
int type = BufferedImage.TYPE_INT_RGB;
BufferedImage image = new BufferedImage(w, h, type);
Graphics2D g2 = image.createGraphics();
g2.drawImage(large, 0, 0, null);
g2.drawImage(small, 10, 10, null);
g2.dispose();
ImageIO.write(image, "jpg", new File("twoInOne.jpg"));
JOptionPane.showMessageDialog(null, new ImageIcon(image), "",
JOptionPane.PLAIN_MESSAGE);
}
}
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