Locally narrowband images can be modeled as 2D spatial AM-FM signals with several applications in image texture analysis and computer vision. In this paper we formulate such an image demodulation problem, and present a solution based on the multidimensional energy operator /spl Phi/(f)=/spl par//spl nabla/f/spl par//sup 2/-f/spl nabla//sup 2/f. We discuss some interesting properties of this multidimensional operator and develop multidimensional energy separation algorithms to estimate the amplitude envelope and instantaneous frequencies of 2D spatially-varying AM-FM signals. Experiments are also presented on applying this 2D energy demodulation algorithm to estimate the instantaneous amplitude contrast and spatial frequencies of image textures bandpass filtered via Gabor filters. The attractive features of the multidimensional energy operator and the 2D energy separation algorithm are their simplicity, efficiency, and ability to track instantaneously-varying spatial modulation patterns.<>


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Demodulation of images modeled by amplitude-frequency modulations using multidimensional energy separation


    Beteiligte:
    Maragos, P. (Autor:in) / Bovik, A.C. (Autor:in)


    Erscheinungsdatum :

    01.01.1994


    Format / Umfang :

    498040 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Demodulation of Images Modeled by Amplitude-Frequency Modulations using Multidimensional Energy Separation

    Maragos, P. / Bovik, A. C. / IEEE; Signal Processing Society | British Library Conference Proceedings | 1994


    Combined Phase and Amplitude Demodulation

    R. S. Bucy / A. J. Mallinckrodt | NTIS | 1981