A combined-transform coding (CTC) scheme for medical images

A combined-transform coding (CTC) scheme for medical images

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...

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Veröffentlicht in:IEEE transactions on medical imaging 1992-06, Vol.11 (2), p.196-202
Hauptverfasser: Zhang, Y.-Q., Loew, M.H., Pickholtz, R.L.
Format: Artikel
Sprache:eng
Schlagworte:
Biological and medical sciences
Biomedical imaging
Discrete cosine transforms
Image coding
Investigative techniques, diagnostic techniques (general aspects)
Magnetic resonance imaging
Medical diagnostic imaging
Medical sciences
Miscellaneous. Technology
Picture archiving and communication systems
Radiodiagnosis. Nmr imagery. Nmr spectrometry
Signal to noise ratio
Transform coding
Working environment noise
X-ray imaging
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Zusammenfassung: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.< >
ISSN:0278-0062
1558-254X
DOI:10.1109/42.141643