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What is spatial interpolation in MPEG?

問題:

What is spatial interpolation in MPEG?

答案:

When a digital image is repositioned or resized, different pixels are usually required from those in the original image. Simply replicating or removing pixels causes unwanted artifacts. With interpolation, the new pixels are calculated by making suitably weighted averages of adjacent pixels, giving more transparent results. The quality depends on the techniques used and the area of original picture, expressed as a number of pixels or points.


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