Image restoration of arbitrarily warped documents

We present a framework for acquiring and restoring images of warped documents. The purpose of our restoration is to create a planar representation of a once planar document that has undergone an arbitrary and unknown rigid deformation. To accomplish this restoration, our framework acquires and flattens the 3D shape of a warped document to determine a nonlinear image transform that can correct for image distortion caused by the document´s shape. Our framework is designed for use in library and museum digitization efforts where very old and badly damaged manuscripts are imaged.