Hierarchical image analysis using Radon transform: an application to error concealment

Author

Colonnese, S. ; Panci, G. ; Sansone, C. ; Scarano, G.

Author_Institution

Dip. INFOCOM, La Sapienza Univ., Rome, Italy

Volume

3

fYear

2005

fDate

11-14 Sept. 2005

Abstract

In this contribution, we show how a hierarchical edge image analysis at macroblock, block and subblock levels allows identifying preminent directional image components. The analysis, performed in the Radon domain, selects the scale level at which the image features present a directional structure that can be better reconstructed by a directional spatial interpolation. When the directional information is known at the decoder side it can drive the spatial error concealment. The experimental results, referring to the case of H.264 coded video, show the significant improvement of the decoded video visual quality achievable by the described technique.

Keywords

Radon transforms; image reconstruction; image representation; H.264 coded video; Radon transform; directional information; error concealment; hierarchical edge image analysis; image features; preminent directional image component identification; spatial error concealment; Band pass filters; Decoding; Image analysis; Image edge detection; Image motion analysis; Image reconstruction; Image representation; Image segmentation; Interpolation; Performance analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Processing, 2005. ICIP 2005. IEEE International Conference on

Print_ISBN

0-7803-9134-9

Type

conf

DOI

10.1109/ICIP.2005.1530534

Filename

1530534