  The virtual viewpoint is perceived as a new technique in virtual navigation,
as yet not supported due to the lack of depth information and obscure camera
parameters. In this paper, a method for achieving close-up virtual view is
proposed and it only uses optical flow to build parallax effects to realize
pseudo 3D projection without using depth sensor. We develop a bidirectional
optical flow method to obtain any virtual viewpoint by proportional
interpolation of optical flow. Moreover, with the ingenious application of the
optical-flow-value, we achieve clear and visual-fidelity magnified results
through lens stretching in any corner, which overcomes the visual distortion
and image blur through viewpoint magnification and transition in Google Street
View system.
