I assumed that you wanted column headers, so it would look more like:
<table>
<tr>
<td>column name 1</td>
<td>column name 2</td>
<td>column name 3</td>
<td>column name 4</td>
</tr>
<tr>
<td>image 1</td>
<td>image 2</td>
<td>image 3</td>
<td>image 4</td>
</tr>
<tr>
<td>image 5</td>
<td>image 6</td>
<td>image 7</td>
<td>image 8</td>
</tr>
<tr>
<td>image 9</td>
<td>image 10</td>
<td>image 11</td>
<td>image 12</td>
</tr>
</table>