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Directional Lapped Transforms for Image Coding | IEEE Journals & Magazine | IEEE Xplore

Directional Lapped Transforms for Image Coding


Abstract:

In this paper, we present the design of directional lapped transforms for image coding. A lapped transform, which can be implemented by a prefilter followed by a discret...Show More

Abstract:

In this paper, we present the design of directional lapped transforms for image coding. A lapped transform, which can be implemented by a prefilter followed by a discrete cosine transform (DCT), can be factorized into elementary operators. The corresponding directional lapped transform is generated by applying each elementary operator along a given direction. The proposed directional lapped transforms are not only nonredundant and perfectly reconstructed, but they can also provide a basis along an arbitrary direction. These properties, along with the advantages of lapped transforms, make the proposed transforms appealing for image coding. A block-based directional transform scheme is also presented and integrated into HD Phtoto, one of the state-of-the-art image coding systems, to verify the effectiveness of the proposed transforms.
Published in: IEEE Transactions on Image Processing ( Volume: 19, Issue: 1, January 2010)
Page(s): 85 - 97
Date of Publication: 15 September 2009

ISSN Information:

PubMed ID: 19758862

References

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