Florida Tech Logo
    • Login
    View Item 
    •   Scholarship Repository at Florida Tech
    • College of Engineering and Science
    • Theses/Dissertations
    • View Item
    •   Scholarship Repository at Florida Tech
    • College of Engineering and Science
    • Theses/Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Applications in Multi-band Isolation of Spectra with Data-Adaptive Sub-banding (MIDAS): Using Multi-criteria Decision Analysis to Optimize MIDAS-based De-noising Methods When Processing Infrasound and Other Signals of Interest

    Thumbnail
    View/Open
    Dissertation PDF (5.781Mb)
    Date
    2021-12
    Author
    Coots, Everett Raymond
    Metadata
    Show full item record
    Abstract
    The ever-present challenge faced by the signal processing analyst is to get more from the available data, whether it be exploiting the same data in new ways to garner new information, or simply to increase the confidence in existing qualitative metrics. Traditional techniques include filtering (to improve the signal to noise ratio of detected signals or images or to isolate and possibly remove interfering signals), feature detection/extraction (identifying key characteristics within the signal) and signal decomposition (identification of dominant signals of interest relative to noise terms). Current research by our team began with an emphasis on the filtering of signals of interest within the infrasound band but has been shown to also be effective in other applications including image processing. The Multi-stage Isolation of Spectra with Data-Adaptive Sub-banding (M.I.D.A.S.) filter begins with a wavelet pre-processing stage and follows with a spectral sub-banding stage for isolation of key signal content. The MIDAS filter is a coherent filter, so the filtering of a complex input produces a phase-preserved complex output. With many other infrasound and seismic data filtering tools such as the Pure State Filter [Olsen, 2009], a real-valued time-domain input is required and thus no phase information can be extracted from the filtered output data set. A typical signal processing scenario where phase preservation is critical is image processing. If the applied filter distorts or even destroys the phase data it will be impossible to correctly recover the image. Both qualitative and quantitative image quality metrics are used within this research and demonstrate that the MIDAS filter is effective at removing channel noise artifacts from images while preserving the phase information. Such noise artifacts might be caused by bit errors during the transmission of an image, or by quantization errors during the digitization or capture of the image.
    URI
    http://hdl.handle.net/11141/3449
    Collections
    • Theses/Dissertations

    DSpace software copyright © 2002-2015  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    @mire NV
     

     

    Browse

    All of Scholarship RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    Statistics

    Most Read ItemsStatistics by CountryMost Read Authors

    DSpace software copyright © 2002-2015  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    @mire NV