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 MoreMetadata
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)
Shanghai Key Laboratory of Digital Media Processing and Transmissions, Shanghai Jiaotong University, Shanghai, China
Microsoft Research Asia, Beijing, China
Microsoft Research Asia, Beijing, China
School of Engineering Science, Simon Fraser University, Burnaby, BC, Canada
Institute of Image Communication and Information Processing, Shanghai Jiaotong University, Shanghai, China
Shanghai Key Laboratory of Digital Media Processing and Transmissions, Shanghai Jiaotong University, Shanghai, China
Microsoft Research Asia, Beijing, China
Microsoft Research Asia, Beijing, China
School of Engineering Science, Simon Fraser University, Burnaby, BC, Canada
Institute of Image Communication and Information Processing, Shanghai Jiaotong University, Shanghai, China