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Multiple processing of radiographic images based on a pyramidal image decomposition

  • US 5,644,662 A
  • Filed: 03/28/1995
  • Issued: 07/01/1997
  • Est. Priority Date: 02/11/1993
  • Status: Expired due to Term
First Claim
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1. A method of generating more than one differently processed image version originating from a single radiation image, comprising the steps of:

  • 1. applying a decomposition transform to said radiation image to decompose it into a multiresolution representation which represents localized image detail at multiple resolution levels,2. storing said multiresolution representation into a memory,3. producing at least two differently processed image versions by applying at least two individual processing cycles to said multi-resolution representation, each processing cycle comprising the steps of;

    (i) retrieving said multiresolution representation from said memory,(ii) modifying the multiresolution representation at at least one resolution level by applying a non-linear monotonically increasing odd modifying function with a slope that gradually decreases with increasing argument values to elements of the multiresolution representation that belong to a same resolution level,(iii) obtaining a processed image representation by applying the inverse of said decomposition transform to the modified multiresolution representation,(iv) applying said processed image presentation to a hard copy recorder or to a display device to control generation of density values of a processed image version of said original image.

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