我可以在 Java 中更改 jpg 图像的分辨率吗？
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Can I change the resolution of a jpg image in Java?
提问by Quintis555
I have some .jpg's that I'm displaying in a panel. Unfortunately they're all about 1500x1125 pixels, which is way too big for what I'm going for. Is there a programmatic way to change the resolution of these .jpg's?
我有一些 .jpg 显示在面板中。不幸的是，它们都是大约 1500x1125 像素，这对于我想要的来说太大了。有没有一种编程方式来改变这些 .jpg 的分辨率？
回答by toniedzwiedz
You can scale an image using Graphics2Dmethods (from java.awt). This tutorial at mkyong.comexplains it in depth.
您可以使用Graphics2D方法（来自java.awt）缩放图像。mkyong.com 上的本教程对其进行了深入解释。
回答by Jonathan Payne
Load it as an ImageIcon and this'll do the trick:
将其作为 ImageIcon 加载，这样就可以解决问题：
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import javax.swing.ImageIcon;
public static ImageIcon resizeImageIcon( ImageIcon imageIcon , Integer width , Integer height )
{
BufferedImage bufferedImage = new BufferedImage( width , height , BufferedImage.TRANSLUCENT );
Graphics2D graphics2D = bufferedImage.createGraphics();
graphics2D.drawImage( imageIcon.getImage() , 0 , 0 , width , height , null );
graphics2D.dispose();
return new ImageIcon( bufferedImage , imageIcon.getDescription() );
}
回答by ewok
you can try:
你可以试试：
private BufferedImage getScaledImage(Image srcImg, int w, int h) {
BufferedImage resizedImg = new BufferedImage(w, h, Transparency.TRANSLUCENT);
Graphics2D g2 = resizedImg.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2.drawImage(srcImg, 0, 0, w, h, null);
g2.dispose();
return resizedImg;
}
