A bottom-up design approach of critically sampled contourlet transform for efficient image representation

Seisuke Kyochi, Shizuka Higaki, Yuichi Tanaka, Masaaki Ikehara

    研究成果: Article査読

    抄録

    In this paper, a novel design method of critically sampled contourlet transform (CSCT) is proposed. The original CT which consists of Laplacian pyramid and directional filter bank provides efficient frequency plane partition for image representation. However its overcompleteness is not suitable for some applications such as image coding, its critical sampling version has been studied recently. Although several types of the CSCT have been proposed, they have problems on their realization or unnatural frequency plane partition which is different from the original CT. In contrast to the way in conventional design methods based on a "topdown" approach, the proposed method is based on a "bottom-up" one. That is, the proposed CSCT decomposes the frequency plane into small directional subbands, and then synthesizes them up to a target frequency plane partition, while the conventional ones decompose into it directly. By this way, the proposed CSCT can design an efficient frequency division which is the same as the original CT for image representation can be realized. In this paper, its effectiveness is verified by non-linear approximation simulation.

    本文言語English
    ページ(範囲)762-771
    ページ数10
    ジャーナルIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
    E92-A
    3
    DOI
    出版ステータスPublished - 2009 1 1

    ASJC Scopus subject areas

    • 信号処理
    • コンピュータ グラフィックスおよびコンピュータ支援設計
    • 電子工学および電気工学
    • 応用数学

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