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Method and apparatus for evaluating the visual quality of processed digital video sequences

  • US 6,493,023 B1
  • Filed: 03/12/1999
  • Issued: 12/10/2002
  • Est. Priority Date: 03/12/1999
  • Status: Expired due to Fees
First Claim
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1. A digital video quality method for evaluating the visual quality of a processed (T) video sequence relative to an original (R) video sequence, the method comprising:

  • sampling the original and processed video sequences to generate sampled sequences (d1) therefrom;

    limiting the processing of said sampled sequences (d1) to a region of interest and generating region of interest sequences (d2) therefrom;

    transforming said region of interest sequences (d2) to local contrast coefficients (d17);

    filtering said local contrast coefficients (d17) to generate filtered components (d18) therefrom;

    converting said filtered components (d18) to threshold units (d19);

    subtracting said threshold units (d19) corresponding to the original (R) and processed (T) sequences to obtain an error sequence (d20);

    subjecting said error sequence (d20) to a contrast masking operation to generate a masked error sequence (d24) therefrom; and

    pooling said masked error sequence (d24) to generate a perceptual error (EΩ

    ).

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