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Interpolation method and apparatus for fast image magnification

  • US 5,847,714 A
  • Filed: 05/31/1996
  • Issued: 12/08/1998
  • Est. Priority Date: 05/31/1996
  • Status: Expired due to Term
First Claim
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1. A method for generating pixel values in a magnified destination image of an object in a destination image space from a source image of the object in a source image space, said destination image and said source image each comprising a two-dimensional array of pixels, each of said pixels in said source image having a value representative of the object, said method comprising the steps of:

  • transforming each pixel in the destination image to a corresponding resampled point in said source image space;

    determining a value of a first pixel in each row of the destination image by vertical interpolation between vertically-aligned neighbor pixels of the corresponding resampled point to provide intermediate pixel values, followed by horizontal interpolation between said intermediate pixel values to provide the value of said first pixel; and

    determining a value of each subsequent pixel in each row of the destination image that has the same neighbor pixels as a previous resampled point by a single horizontal interpolation between the intermediate pixel values of the previous resampled point.

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