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Method and apparatus for generating variably scaled displays

  • US 4,790,028 A
  • Filed: 09/12/1986
  • Issued: 12/06/1988
  • Est. Priority Date: 09/12/1986
  • Status: Expired due to Fees
First Claim
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1. A method of variably rescaling a total image composed of a plurality of image points disposed within boundaries of the total image for display within a display area of fixed dimensions, without altering the boundaries of the total image displayed, said method comprising the steps of:

  • dividing the total image into image area segments,assigning a selected scaling function to each image area segment, each said selected scaling function being assigned such that the selected scaling function in at least one image area segment has a value greater than one and the selected scaling function in at least another image area segment has a value smaller than one, but with the selected scaling functions over the total image having a mean value equal to one in all directions,generating an associated transformation function for each image area segment as a function of the selected scaling function,generating transformed image points for each image area segment in accordance with the associated transformation function, andgenerating in said display area of fixed dimensions a rescaled image utilizing the transformed image points such that the total image remains displayed although at least one image area segment of the total image is magnified.

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