Hello souhail3d,
Don't see any preview аt the moment. But generally there are two approaches: walk-around and turn-table image acquisition scenario. In the latter case it would be necessary to apply masks to cover the static background.
Also you need to make sure that the shape of the object doesn't change, so for the soft objects it might be quite problematic to make a complete 3D model that includes to the scan both top and bottom parts.