-Data">About Image Data</a></li>
    </ul>
  </li>
  <li><a href="#Compose-hidden-image-from-Bit-0">3.) Compose hidden image from Bit 0</a>
    <ul>
      <li><a href="#A.-Compose-hidden-image-with-PDL">A. Compose hidden image with PDL</a></li>
      <li><a href="#B.-Compose-hidden-image-with-Array">B. Compose hidden image with Array</a>
        <ul>
          <li><a href="#res-recreate-bit7-bit6-bit5">$res = recreate($bit7,$bit6,$bit5)</a></li>
        </ul>
      </li>
    </ul>
  </li>
  <li><a href="#Wr