A novel radon based Ray-Space interpolation algorithm

Author

Hou, Ling ; Au, Oscar C. ; Fan, Xiaopeng ; Guo, Liwei ; Ma, Mengyao

Author_Institution

Dept. Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong

fYear

2008

fDate

8-10 Oct. 2008

Firstpage

850

Lastpage

854

Abstract

Ray-space interpolation is one of the key technologies to make ray-space based FTV (Free Viewpoint Television) system feasible. Since ray-space data is composed of straight lines with different slopes, the problem in ray-space interpolation is to find the slope of the straight lines which tells us the interpolation direction. In this paper, a radon based ray-space interpolation algorithm is proposed. First, feature points of epipolar plane image (EPI) are extracted to form a feature EPI (FEPI). Then, radon transform is applied to FEPI to find the possible interpolation direction. Finally, a new cost function is proposed to improve the smoothness of disparity map and find the optimal interpolation direction. Experimental results show that both the performance and the robustness of the proposed algorithm are much higher than that of the traditional pixel matching based interpolation (PMI) and block matching based interpolation (BMI).

Keywords

feature extraction; image matching; image resolution; interpolation; television; block matching based interpolation; epipolar plane image; free viewpoint television system; pixel matching based interpolation; radon based ray-space interpolation algorithm; radon transform; Cameras; Computer science; Cost function; Data mining; Gold; Interpolation; Layout; Mean square error methods; Robustness; TV;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia Signal Processing, 2008 IEEE 10th Workshop on

Conference_Location

Cairns, Qld

Print_ISBN

978-1-4244-2294-4

Electronic_ISBN

978-1-4244-2295-1

Type

conf

DOI

10.1109/MMSP.2008.4665192

Filename

4665192