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<table class="ltx_tabular">
<tbody>
<tr class="odd">
<td align="left"><em>Name</em></td>
<td align="left"><em>Description</em></td>
<td align="left"><em>Examples</em></td>
</tr>
<tr class="even">
<td align="left">Deformation transfer</td>
<td align="left">Transfer the deformation of the face directly to the avatar to deform it in the same way. For this kind of techniques the facial features captured from the user must be related with vertices in the avatar.</td>
<td align="left"></td>
</tr>
<tr class="even">
<td align="left">Linear mapping</td>
<td align="left">Transfer the movements of the features in the face to move or control the animations of the character. For example, to use the movement of the eyebrows to control the animation of the eyebrows in the avatar.</td>
<td align="left"></td>
</tr>
<tr class="even">
<td align="left">Cross mapping</td>
<td align="left">Transfer the movements of the features in the face to move or control the animations of the character, but for different face elements. For example, to use the movement of the eyebrows to control the animation of the ears in the avatar.</td>
<td align="left"></td>
</tr>
<tr class="even">
<td align="left">Parallel parametrization/Corresponding parametrization</td>
<td align="left">To use the same parameters in both models (source and target). For face motion capture we can use the capture model as the source avatar.</td>
<td align="left"></td>
</tr>
</tbody>
</table>
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Source: "Facial Retargeting with Automatic Range of Motion Alignment (2017)"