BufferedImage img = ImageIO.read(new File("original.png"));
img = Resampler.rescale(img, width, height, gamma, 1.0f, new Resampler.LanczosFilter(4)/*BoxFilter()*/, BoundaryOp.WRAP);
ImageIO.write(img, "png", new File("scaled.png"));

public static BufferedImage getScaledImage(BufferedImage image, int targetWidth,
                                               int targetHeight, boolean highQuality) {
        int accWidth, accHeight;
        if (highQuality) {
            accHeight = image.getHeight();
            accWidth = image.getWidth();
        } else {
            accHeight = targetHeight;
            accWidth = targetWidth;
        }

        BufferedImage result = image;
        do {
            if (highQuality) {
                accHeight = Math.max(accHeight / 2, targetHeight);
                accWidth = Math.max(accWidth / 2, targetWidth);
            }
            BufferedImage tmp = new BufferedImage(accWidth, accHeight, image.getType());

            Graphics2D g2 = tmp.createGraphics();

            if (highQuality) {
                g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                                    RenderingHints.VALUE_INTERPOLATION_BICUBIC);
            } else {
                g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                                    RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR);
            }
            g2.drawImage(result, 0, 0, accWidth, accHeight, null);

            result = tmp;
        } while (accHeight != targetHeight && accWidth != targetWidth);

        return result;
    }