=level</dt>
<dd>Smoothing of depthmap in depth direction. Value is in 0-255 units.</dd>
<dt>
<code>--remove-bg</code>=threshold</dt>
<dd>Add alpha channel to depthmap and remove constant colored background.
Threshold is positive for black background, negative for white background.</dd>
<dt>
<code>--halo-radius</code>=level</dt>
<dd>Reduce halo effects in depthmap near sharp contrast edges.
Value is radius in pixels.</dd>
<dt>
<code>--3dviewpoint</code>=x:y:z:zscale</dt>
<dd>Viewpoint used for the 3D preview