title: Volumetric medical image compression using 3D listless embedded block partitioning.
abstract: This paper presents a listless variant of a modified three-dimensional (3D)-block coding algorithm suitable for medical image compression. A higher degree of correlation is achieved by using a 3D hybrid transform. The 3D hybrid transform is performed by a wavelet transform in the spatial dimension and a Karhunen-Loueve transform in the spectral dimension. The 3D transformed coefficients are arranged in a one-dimensional (1D) fashion, as in the hierarchical nature of the wavelet-coefficient distribution strategy. A novel listless block coding algorithm is applied to the mapped 1D coefficients which encode in an ordered-bit-plane fashion. The algorithm originates from the most significant bit plane and terminates at the least significant bit plane to generate an embedded bit stream, as in 3D-SPIHT. The proposed algorithm is called 3D hierarchical listless block (3D-HLCK), which exhibits better compression performance than that exhibited by 3D-SPIHT. Further, it is highly competitive with some of the state-of-the-art 3D wavelet coders for a wide range of bit rates for magnetic resonance, digital imaging and communication in medicine and angiogram images. 3D-HLCK provides rate and resolution scalability similar to those provided by 3D-SPIHT and 3D-SPECK. In addition, a significant memory reduction is achieved owing to the listless nature of 3D-HLCK.
authors.affiliation: Department of ECE, K L University, Vaddeswaram, Guntur, Andhra Pradesh 522502 India.
authors.forename: Ranjan K
authors.initials: RK
authors.lastname: Senapati
authors.affiliation: GMR Institute of Technology, Rajam, Srikakulam, 532127 India.
authors.forename: P M K
authors.initials: PM
authors.lastname: Prasad
authors.affiliation: Department of CSE, K L University, Vaddeswaram, Guntur, Andhra Pradesh 522502 India.
authors.forename: Gandharba
authors.initials: G
authors.lastname: Swain
authors.affiliation: Department of CSE, K L University, Vaddeswaram, Guntur, Andhra Pradesh 522502 India.
authors.forename: T N
authors.initials: TN
authors.lastname: Shankar
keywords: 3D hierarchical listless embedded block; Embedded coder; Peak-signal-to-noise-ratio; Set partitioning in hierarchical trees; Volumetric compression