Image Resizing on the Integer DCT Domain Used in H.264/AVC
In this paper, we propose a method of resizing images in the integer DCT domain employed by H.264/AVC. To accomplish this, we first derive the matrix scaling the image resolution, and then factorize the scaled DCT blocks and the post scaling factors (PF) from the matrix obtained from the multiplicat...
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Veröffentlicht in: | IEICE Transactions on Communications 2008/05/01, Vol.E91.B(5), pp.1599-1607 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | In this paper, we propose a method of resizing images in the integer DCT domain employed by H.264/AVC. To accomplish this, we first derive the matrix scaling the image resolution, and then factorize the scaled DCT blocks and the post scaling factors (PF) from the matrix obtained from the multiplication of the scaling matrix and the original integer DCT blocks. Then, we separate the scaled DCT blocks into the integer scaling matrix and the scaled integer DCT blocks. The experiments show that the proposed method produces nearly the same performance as those operating in the real DCT domain. |
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ISSN: | 0916-8516 1745-1345 |
DOI: | 10.1093/ietcom/e91-b.5.1599 |