e forergound image is log compressed before display.</td>
        </tr>
    
		<tr valign="top">
            <td bgcolor="#F2F2F2"><code>'LogCompRef'</code></td>
            <td bgcolor="#F2F2F2"><em>(numeric scalar)</em></td>
            <td bgcolor="#F2F2F2"><code>max(fg(:))</code></td>            
            <td bgcolor="#F2F2F2">Reference value used in the log compression, where <code>fg_compressed = 20 * log10(fg ./ fg_ref)</code>.</td>
        </tr>      
    
        <tr valign="top">
            <t