Ringing reduction for radially restored images

Yupeng Zhang, Toshitsugu Ueda

    研究成果: Conference contribution

    抄録

    This paper demonstrates a ringing reduction method for radially restored images, whose blurred versions are produced by a spherical single lens imaging system (SSLIS) embedded in an experimental camera module. The method is capable of reducing two types of ringing: those near object edges of sharp intensity transitions inside a restored image are reduced by detecting pixel intensity differences that are higher than a threshold intensity level, and replacing the corresponding pixels from a further smoothed version of the captured image; and those around image center and four boundaries of the restored image are suppressed by nearest neighbor interpolation for the upper boundary and arc-shaped boundaries of the polar image converted from the captured image. Visual evaluation shows that both types of ringing artifact in the radially restored image are greatly suppressed by the proposed method compared to the resulting image without the ringing reduction step.

    本文言語English
    ホスト出版物のタイトルOptics InfoBase Conference Papers
    出版ステータスPublished - 2012
    イベントOptical Sensors, SENSORS 2012 - Monterey, CA
    継続期間: 2012 6 242012 6 28

    Other

    OtherOptical Sensors, SENSORS 2012
    CityMonterey, CA
    Period12/6/2412/6/28

    ASJC Scopus subject areas

    • Instrumentation
    • Atomic and Molecular Physics, and Optics

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