在java中调整jpeg图像的大小 [英] resize jpeg image in java

问题描述

我正在研究java中的图像比较。我认为在比较图像之前，最好处理图像以设置固定大小的图像。是否有任何java功能来调整图像大小。我想将图像重新缩放到300 * 225。

i am working on image comparison in java. I think before going to compare the images, it is better to process the images for setting a fixed size image. Is there any java functionality to resize the images. I want to rescale the images to 300*225.

推荐答案

public ImageIcon resizeImage(String filePath, int w, int h) {


        String data = filePath;
        BufferedImage bsrc, bdest;
        ImageIcon theIcon;

//scale the image
        try
        {

            bsrc = ImageIO.read(new File(data));

            bdest = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
            Graphics2D g = bdest.createGraphics();
            AffineTransform at = AffineTransform.getScaleInstance((double) w / bsrc.getWidth(),
                    (double) h / bsrc.getHeight());
            g.drawRenderedImage(bsrc, at);

            //add the scaled image
            theIcon = new ImageIcon(bdest);
            return theIcon;
        }
        catch (Exception e)
        {
            System.out.println("This image can not be resized. Please check the path and type of file.");
            return null;
        }

     }

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