Physically-Valid View Synthesis by Image Interpolation
نویسندگان
چکیده
Image warping is a popular tool for smoothly transforming one image to another. \Morphing" techniques based on geometric image interpolation create compelling visual e ects, but the validity of such transformations has not been established. In particular, does 2D interpolation of two views of the same scene produce a sequence of physically valid in-between views of that scene? In this paper, we describe a simple image recti cation procedure which guarantees that interpolation does in fact produce valid views, under generic assumptions about visibility and the projection process. Towards this end, it is rst shown that two basis views are su cient to predict the appearance of the scene within a speci c range of new viewpoints. Second, it is demonstrated that interpolation of the recti ed basis images produces exactly this range of views. Finally, it is shown that generating this range of views is a theoretically well-posed problem, requiring neither knowledge of camera positions nor 3D scene reconstruction. A scanline algorithm for view interpolation is presented that requires only four user-provided feature correspondences to produce valid orthographic views. The quality of the resulting images is demonstrated with interpolations of real imagery.
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تاریخ انتشار 1995