Reprojection-based method for camera arrays of refocusing onto arbitrary focal surfaces

摘要

Recent years have witnessed a strong renewal of interest in light field cameras, as they can capture rich angular information within one snapshot. As a representative application of light field cameras, refocusing can change the in-focus region of images so that objects lying on a specified plane are in focus, whereas objects lying off this plane are blurred. The existing refocusing methods can only project images onto focal planes. In this paper, we proposed a reprojetion-based method to refocus the images captured by camera arrays onto arbitrary focal surfaces, rather than only planes. Combining the camera imaging model and the equation of the focal surface, we can reproject the images onto arbitrary focal surface. We can change the focal surface by changing the equation of the focal surface. Experiments on real-world scenes (captured by our self-developed light field devices) demonstrate the validity of the proposed method.