An Overview of Image Matting and Copoition

An Overview of Image MattingSpeaker: Hao HuAdviser: Jian-Juin DingBullet Time

OutlineBullet TimeTraditional Approach of MattingBayesian Image MattingSee You AroundBullet TimeThe Matrix

Bullet Time RigGreen Screen Room120 cameras

Bullet Time

Traditional Approach of Matting : Color Difference MethodBased on RGB color model

if B>G then B=G=B max(G,R)Traditional Approach of Matting : Color Difference MethodC = F + (1- )B

C:CompositionF:ForegroundB:Background

OriginFC=B max(G,R)Examples

Problems for Blue Screen Matting Back ground color usually not perfect.

Problems for Color Difference Method

Bayesian Image Matting

Bayesian Image Matting

Bayesian Image Matting

Bayesian Image Matting

See You Around

Thank youReferencehttp://www.csie.ntu.edu.tw/~cyy/courses/vfx/13spring/news/http://www.youtube.com/watch?v=Rg5dNOPJf-Ihttp://www.youtube.com/watch?v=bKEcElcTUMkhttp://research.microsoft.com/apps/pubs/default.aspx?id=73833