The methods of multi-perspective mosaic ask mostly estimate the parameter of camera

the depth of every pixels

and more images. The ubiquitous disadvantage of these methods is over heavy calculation. On account of the difficulty of shooting on the sea

these methods will not serve the view of ship-handing simulator. So the mosaic method based on the simple 2D overlapped image is required

but the multi-perspective and shelter between the scenarios bring more difficulty. This paper construct a imaging geometric model of the overlapped images according the demand in view and background of ship-handing simulator

then proposes a automatic mosaic and smoothness method based on the most depth line on the vertical middle plane and the parallel line on the same depth plane. The experimental results show that the jointing efficiency of this algorithm is better

and it has wide application perspective at fields of multi-perspective mosaic.