DocumentCode :
3590011
Title :
Quality Measures for Decompressed Medical Images: Statistics, Observers, and ROCs
Author :
Li, Dunling ; Loew, Murray H.
Author_Institution :
Dept. of Electr. & Comput. Eng., George Washington Univ., DC
Volume :
1
fYear :
2007
Abstract :
The diagnostic value of a medical image after it has been decompressed is a very practical measure of the image quality and the compression method. A computational observer can be used to make decisions based on an image and thus can provide an assessment of diagnostic value. This paper provides a closed-form estimate of the channelized Hotelling observer´s (CHO) output. In medical applications, CHO has been used successfully to predict human observer performance and to evaluate image quality for detection tasks in various backgrounds. To date, it has been used only empirically - i.e., on a set of images - to evaluate compressed image quality. Using a representation of compression noise this paper derives in closed-form the corresponding CHO test statistics and performance. The performance (as measured by the receiver operating characteristic [ROC]) is verified using decompressed JPEG lumpy-background images. The verification results show that the derived ROCs predict the estimated ROCs very well.
Keywords :
data compression; decision making; image coding; medical image processing; observers; statistical analysis; JPEG lumpy-background images; channelized Hotelling observer; compression method; compression noise representation; computational observer; decompressed medical images; diagnostic value; human observer performance; image quality; receiver operating characteristic; Biomedical equipment; Biomedical imaging; Humans; Image coding; Image quality; Medical diagnostic imaging; Medical services; Statistical analysis; Statistics; Testing; Image coding; decision-making; image reconstruction; quantization; visual system;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech and Signal Processing, 2007. ICASSP 2007. IEEE International Conference on
ISSN :
1520-6149
Print_ISBN :
1-4244-0727-3
Electronic_ISBN :
1520-6149
Type :
conf
DOI :
10.1109/ICASSP.2007.366679
Filename :
4217079
Link To Document :
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