AIP Final Project

Study and Implementation of Feature-aware Texturing

921509 陸可凡

922047 陳彥銘

Outline

Introduction Process Flow Algorithm

Transformations Detail algorithm flow Feature-aware mapping

Result Conclusion

Introduction

Ran Gal, Olga Sorkine and Daniel Cohen-Or,"Feature-aware texturing", EGSR 2006.

Original image mapping and manipulation techniques treat the entire texture image homogeneously.

Introduction (cont.)

This paper present an inhomogeneous 2D texture mapping method.

The method is capable of preserving the shape of masked regions of the texture while warping the image according to the user specifications.

Introduction (cont.)

Process Flow

Given Original Image

Produce Feature Map in Binary

(with user specifications)

Feature-aware Mapping

(with given warping function)

Output Result Image

Algorithm - Transformations

There are two types of transformation for each quad Warping transformation

Scaling Rotation …etc

Rigid transformation preserve the size of a feature

Algorithm - Detail algorithm flow

For each quad

Is Feature

Warping transformation

Rigid

transformation

Compute the matrix A and b

Get the warped quads

Interpolate the quads

NO YES

Algorithm - Feature-aware mapping

Image

Quad

Algorithm - Feature-aware mapping

Algorithm - Feature-aware mapping

＝

Ａ x ＝ b

MxN Nx1 Mx1

x1

xN

.

.

.

bx1

.

.

.

bxM

a11 ‧‧‧ a1N

aM1 ‧‧‧ aMN

‧

‧

‧

Result - Painted Image

Hx4,Wx4

Result - Painted Image (cont.)

Wx4

Result - Painted Image (cont.)

Hx4

Result – Nature Image with Regular Background

Hx2,Wx2

Result – Nature Image with Irregular Background

Hx2,Wx2

Conclusion