Region of Interest Based Coding of 2-D and 3-D Magnetic Resonance Images.
Srikanth Ryali, A. G. Ramakrishnan · 2004
We present a lossy to lossless wavelet based image compression scheme with progressive transmission and region of interest coding functionalities for 2D and 3D magnetic resonance images. Context based entropy coding is used to efficiently code significance and sign information of wavelet coefficients. Contexts for 2D and 3D schemes are built using a mutual information based context merging algorithm. The obtained compression performance for the 3D scheme of about 2.1 bits per pixel is comparable to the existing Multidimensional layered zero coding (MLZC) scheme [4].