A typing off-loading and item separation system to automatically separate different parcel types includes an feed conveyor, receiving conveyor, sorting conveyor, cameras and photoelectric eye. Overhead cameras and/or photoelectric sensors detect the item size and whether it is cubic in nature and type and size of its footprint. An in-line slide sorter having alternating conveyor rollers and pop-up belts pass through to, or divert items from a downstream conveyor. A vison based system may also be used to detect space between articles and insert articles in the unoccupied space to maximize conveyor area, volume, or density by controlling conveyor speed.