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Process for interpolating progressive frames

  • US 5,995,154 A
  • Filed: 12/10/1996
  • Issued: 11/30/1999
  • Est. Priority Date: 12/22/1995
  • Status: Expired due to Fees
First Claim
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1. Process for converting interlaced frames into progressive frames comprising a change of frame frequency by interpolation and motion compensation whereinwhen a motion vector associated with a pixel to be interpolated is non-zero or when this vector is zero, but the confidence accorded to this vector is less than a given threshold,the interpolation of a pixel (x,y) of a frame situated temporally between two input frames is carried out by a combination of median filtering and motion compensation linear and median filtering comprising:

  • obtaining by a first motion-compensated linear temporal filter a first interpolated value based on a first set of pixels;

    obtaining by a second motion-compensated linear temporal filter a second interpolated value based on a second set of pixels;

    obtaining by a motion-compensated median temporal filter a third median value based on a third set of pixels; and

    median filtering according to said first and second interpolated values and said third median value to obtain a value corresponding to said interpolated pixel (x,y).

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