public static boolean rescale(InputStream input, OutputStream output, int maxDim) throws IOException {
		// Open the source image
		BufferedImage source = ImageIO.read(input);
		if (source==null) {
			return false;
		}
		// Get width & height
		int w = source.getWidth(), h = source.getHeight();
		// Calculate the scale
		double scale = (double)maxDim/Math.max((double)w, (double)h);
		if (scale>=1) {
			//scale=1;
			copyStream(input, output);
			return false;
		}
		int tw = (int)((double)w*scale), th = (int)((double)h*scale);
		// Create the image
		BufferedImage image = new BufferedImage(tw, th, BufferedImage.TYPE_INT_RGB);
		// Create the graphics
		Graphics2D graphics = image.createGraphics();
		try {
			// Set rendering hints
			graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
			graphics.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
			graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
			// Get the scaled instance
			Image scaled = source.getScaledInstance((int)(w * scale), (int)(h * scale), Image.SCALE_SMOOTH);
			// Set the color
			graphics.setColor(Color.WHITE);
			// Paint the white rectangle
			graphics.fillRect(0, 0, tw, th);
			// Draw the image
			graphics.drawImage(scaled, 0, 0, null);
		} finally {
			// Always dispose the graphics
			graphics.dispose();
		}
		// Write the rescaled image
		ImageIO.write(image, "jpg", output);
		return true;
	}