Manipulating Perspective in Stereoscopic Images

Stereoscopic (‘3D’) devices and content relying on stereopsis are now widely available. However, traditional image editing techniques cannot be directly used to edit stereoscopic media, as extra constraints are needed to ensure consistent changes are made to both left and right images. This paper addresses the problem of manipulating perspective in stereoscopic pairs. We note that a straightforward approach based on depth recovery is unsatisfactory. Instead, our method relies on feature correspondences between stereoscopic image pairs. Given a new, user-specified perspective, we determine correspondence constraints under this perspective, and optimize a 2D warp for each image which preserves straight lines, and guarantees proper stereopsis relative to the new camera. Experiments demonstrate that our method generates new views with suitable stereoscopic output which correspond well to expected projections, for a wide range of specified perspective. Various advanced camera effects, such as dolly zoom and wide angle effects, can also be readily generated for stereoscopic image pairs using our method.