1. Restoring 2D Content from Distorted Documents Michael S. Brown,Mingxuan Sun, Ruigang Yang,Lin Yun, W.Brent Seales

2. Introduction

3. System Overview

4. Geometric Correction

6. Specifying Fixed Vertices

7. RGB to YUV Illumination edge Reflectance edge

8. Shading Correction Illumination Edge Detection illumination edges = discontinuous 3D geometry ． Gradient is denoted by ． Illumination edges are denoted by {E} ． Example of a set extracted of Illumination edges

9. Shading Correction Image Restoration

10. Bleed Correction

11. Result