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.


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    Title :

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


    Contributors:
    Colonnese, S. (author) / Panci, G. (author) / Sansone, C. (author) / Scarano, G. (author)


    Publication date :

    2005-01-01


    Size :

    385432 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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