High‐efficient coding for ct‐image archiving
Hiroyuki Hiroyuki, Yoshinao Koizumi, Tsuneo · Systems and Computers in Japan · 1990
Abstract This paper considers a new high‐efficient coding scheme of the CT image and projection data. There are two kinds of redundancies in the CT image: one is the statistical redundancy based on the correlation between pixels; the other is the deterministic redundancy resulting from the image formation process—i.e., the CT images are reconstructed from a finite number of sampled projection data. The significant information about an object in the CT image can be specified by considering the reconstruction process. Based on the investigation of such redundancies, a new reversible coding scheme of CT image with high compression ratio is proposed in which both statistical and deterministic redundancies can be removed.