| 摘要 |
An interpolation method and apparatus for converting pixels according to image formats, prevents deterioration of picture quality by performing a bilinear conversion which uses a larger number of pixels than does the conventional interpolation method which uses only two pixels. When a ratio between an interpolation point and a vertical line of unconverted pixels is DELTA 1, a ratio between the interpolation point and a horizontal line of unconverted pixels is DELTA 2, and eight unconverted pixels A1-A4 and B1-B4 on two lines adjacent to the interpolation position are used along with a coupling coefficient alpha , a final interpolation signal I is generated according to the following equations: I1=(1- DELTA 1)(1- DELTA 2)A1+(1- DELTA 1) DELTA 2A2+ DELTA 1(1- DELTA 2)A3+ DELTA 1 DELTA 2A4;I2=(1- DELTA 1)(1- DELTA 2)B1+(1- DELTA 1) DELTA 2B2+ DELTA 1(1- DELTA 2)B3+ DELTA 1 DELTA 2B4; andI= alpha I1+(1- alpha )I2.
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