Restoring 2D Content from Distorted Documents

Michael S. Brown,Mingxuan Sun,

Ruigang Yang,Lin Yun, W.Brent Seales

Introduction

System Overview

Geometric Correction

Geometric Correction

Specifying Fixed Vertices

Specifying Fixed Vertices

RGB to YUV

Illumination edge

Reflectance edge

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

Shading Correction

Image Restoration

Bleed Correction

Result

Result

Result