code: public static BufferedImage trim(BufferedImage img) {
      int width = getTrimmedWidth(img);
      int height = getTrimmedHeight(img);
      int xStart = getTrimmedXStart(img);
      int yStart = getTrimmedYStart(img);
  
      BufferedImage newImg = new BufferedImage(width - xStart, height - yStart, BufferedImage.TYPE_INT_ARGB);
      Graphics g = newImg.createGraphics();
      g.drawImage(img, 0 - xStart, 0 - yStart, null);
  
      return newImg;
    }
docs: Trims an image (removes all leading and trailing white spaces)
  @param img Image in memory
  @return Trimmed image