如何缩放BufferedImage [英] how do I scale a BufferedImage

问题描述

我已经查看了这个问题，但是它似乎并没有真正回答我有问题。我有一个图像文件，它可以是任何分辨率。我需要以特定分辨率将该图像加载到 BufferedImage 对象中（例如，对于本示例来说为800x800）。我知道Image类可以使用 getScaledInstance（）将图像缩放到新的大小，但是后来我不知道如何将其恢复到 BufferedImage 。是否有一种简单的方法可以将缓冲图像缩放到特定大小？

I have viewed this question, but it does not seem to actually answer the question that I have. I have a, image file, that may be any resolution. I need to load that image into a BufferedImage Object at a specific resolution (say, for this example, 800x800). I know the Image class can use getScaledInstance() to scale the image to a new size, but I then cannot figure out how to get it back to a BufferedImage. Is there a simple way to scale a Buffered Image to a specific size?

注意 II不希望通过特定因子缩放图像，我想拍摄一张图像，然后制作一个特定的尺寸。

NOTE I I do not want to scale the image by a specific factor, I want to take an image and make is a specific size.

推荐答案

像这样的东西？ ：

 /**
 * Resizes an image using a Graphics2D object backed by a BufferedImage.
 * @param srcImg - source image to scale
 * @param w - desired width
 * @param h - desired height
 * @return - the new resized image
 */
private BufferedImage getScaledImage(Image srcImg, int w, int h){
    BufferedImage resizedImg = new BufferedImage(w, h, BufferedImage.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;
}

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