Geometric and photometric restoration of distorted documents

We present a system to restore the 2D content printed on distorted documents. Our system works by acquiring a 3D scan of the document´s surface together with a high-resolution image. Using the 3D surface information and the 2D image, we can ameliorate unwanted surface distortion and effects from non-uniform illumination. Our system can process arbitrary geometric distortions, not requiring any pre-assumed parametric models for the document´s geometry. The illumination correction uses the 3D shape to distinguish content edges from illumination edges to recover the 2D content´s reflectance image while making no assumptions about light sources and their positions. Results are shown for real objects, demonstrating a complete framework capable of restoring geometric and photometric artifacts on distorted documents