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Scene change detector for digital video

  • US 5,751,378 A
  • Filed: 09/27/1996
  • Issued: 05/12/1998
  • Est. Priority Date: 09/27/1996
  • Status: Expired due to Term
First Claim
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1. A method for detecting a scene change between a prior video picture and a current video picture, comprising the steps of:

  • determining average luminance values of a block pair of said prior and current video pictures;

    determining an incremental visual sensation value using a difference between said average luminance values;

    determining a minimum of said average luminance values of said current and prior picture blocks, wherein;

    if said minimum exceeds a dark scene threshold, said incremental visual sensation value is determined using the ratio of (a) the absolute value of said difference, and (b) said minimum;

    if said minimum does not exceed a dark scene threshold, said incremental visual sensation value is determined using the ratio of (a) the absolute value of said difference, and (b) said dark scene threshold; and

    if said incremental visual sensation value exceeds a block contrast threshold level, a scene change is indicated.

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