static BufferedImage resizeImageNoTransparency(BufferedImage img, int newW, int newH) {
  Image tmp = img.getScaledInstance(newW, newH, Image.SCALE_SMOOTH);
  BufferedImage dimg = new BufferedImage(newW, newH, BufferedImage.TYPE_INT_RGB);
  Graphics2D g2d = dimg.createGraphics();
  g2d.drawImage(tmp, 0, 0, null);
  g2d.dispose();
  return dimg;
}

static BufferedImage resizeImageNoTransparency(BufferedImage img, int newW) {
  int newH = iround(img.getHeight()*(double) newW/img.getWidth());
  ret resizeImageNoTransparency(img, newW, newH);
}

Began life as a copy of #1004224