hard to get an agreement with all existing communication applications</td>
  									</tr>
									<td>Leap Motion </td>
									<td>We want to use Leap Motion to capture the sign language</td>
    									<td >Users need to purchase an extra device, which is relatively expansive campared to a camera.</td>
  									</tr>
									</tbody></table>
									Idea that included in our current project
									<table class="reference">
  									<tbody><tr>
    									<th style="width:25%;" al