Title :
A combined-transform coding (CTC) scheme for medical images
Author :
Zhang, Ya-Qin ; Loew, Murray H. ; Pickholtz, Raymond L.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., George Washington Univ., Washington, DC, USA
fDate :
6/1/1992 12:00:00 AM
Abstract :
A combined-transform coding (CTC) scheme is proposed to reduce the blocking artifact of conventional block transform coding and hence to improve the subjective performance. The proposed CTC scheme is described and its information-theoretic properties are investigated. Computer simulation results for a class of chest X-ray images are presented. A comparison between the CTC scheme and the conventional discrete cosine transform (DCT) and discrete Walsh-Hadamard transform (DWHT) demonstrates the performance improvement of the proposed scheme. In addition, combined coding can also be used in noiseless coding, yielding a slight improvement in the compression performance if it is used properly
Keywords :
diagnostic radiography; encoding; picture processing; blocking artifact reduction; chest X-ray images; combined-transform coding schemes; compression performance; computer simulation; discrete Walsh-Hadamard transform; discrete cosine transform; information-theoretic properties; medical diagnostic imaging; medical images; noiseless coding; subjective performance; Biomedical imaging; Discrete cosine transforms; Image coding; Magnetic resonance imaging; Medical diagnostic imaging; Picture archiving and communication systems; Signal to noise ratio; Transform coding; Working environment noise; X-ray imaging;
Journal_Title :
Medical Imaging, IEEE Transactions on
