Method and apparatus for reducing size of image data

Method and apparatus for reducing size of image data

  • CN 102,282,586 B
  • Filed: 01/19/2009
  • Issued: 05/10/2017
  • Est. Priority Date: 01/19/2009
  • Status: Active Grant
First Claim
Patent Images

1. a kind of for being based on the method that input picture (IMG1) provides output image (IMG2), methods described includes:

  • - determine position (OP) of the output pixel (P2) relative to the input picture (IMG1);

    - horizontal scaling factor (the CF that selects for the output image (IMG2)H) and the vertically scale factor (CFH);

    - based on the output pixel (P2) relative to the input picture (IMG1) position and based on the horizontal scaling becauseSon (CFH) and the vertically scale factor (CFH), determine the value of the element (E) of filter array (FA1), so that the filterThe nonzero value of the element (E) of ripple device array (FA1) is similar to parabola reference surface (REFS), wherein, the reference surface(REFS) there is maximum at basic point (BP) place;

    And- by the input of nonzero value of the execution in the element (E) and the input picture (IMG1) positioned at corresponding positionProduct and computing between the value of pixel (P1), determines the value of the output pixel (P2), wherein, the filter array (FA1)It is superimposed on the input picture (IMG1), so that the position of the basic point (BP) corresponds to the output pixel (P2)Position;

    Wherein, the nonzero element (E) is for the root-mean-square-deviation of the reference surface (REFS) is less than the nonzero element (E)Meansigma methodss 10%.

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