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Image signal-processing system based on synthetic aperture technique

  • US 4,586,135 A
  • Filed: 11/15/1983
  • Issued: 04/29/1986
  • Est. Priority Date: 11/20/1982
  • Status: Expired due to Term
First Claim
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1. An apparatus for reconstructing an image signal of a foreground subject on the basis of a synthetic aperture technique which, when a radiation is emitted to the foreground subject, receives a hologram having an amplitude corresponding to a wave reflected from the foreground subject, and reconstructs the image signal of said foreground subject from said hologram signal, comprising:

  • (a) first means for compressing the amplitude of said hologram signal as a first nonlinear processing;

    (b) second means for prestoring kernel function data corresponding to said hologram signal in conformity with the synthetic aperture technique, for combining the hologram signal whose amplitude is compressed with the kernel function data, and for performing the convolution integration of a combination of said hologram signal and said kernel function data, thereby producing a reconstructed image signal having an ampltiude; and

    (c) third means for expanding the amplitude of the reconstructed image signal as a second nonlinear processing.

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