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Filter system and method for efficiently suppressing noise and improving edge definition in a digitized image

  • US 5,933,540 A
  • Filed: 05/11/1995
  • Issued: 08/03/1999
  • Est. Priority Date: 05/11/1995
  • Status: Expired due to Term
First Claim
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1. A method for efficiently improving a digitized image defined by pixel values, comprising the steps of:

  • supplying a base line of an image, which comprises an image data array, to a plurality of filters, said plurality of filters including a preemphasis filter, a vector smooth filter, and an area smooth filter;

    processing and image data array concurrently in said plurality of filters to derive a corresponding plurality of modified image arrays, the preemphasis filter processing the image data array to enhance edges in the image data array, the vector smooth filter processing the image data array to smooth the image data array while emphasizing certain linear features contained within the image data array, the area smooth filter processing the image data array to adjust values of pixels surrounding a target pixel of the image data array such that the pixel values of the pixels surrounding the target pixel are provided with values that are closer in value to the pixel value of the target pixel; and

    combining said image data arrays to drive an improved image data array.

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