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Accuracy and precision in estimating noise power spectrum in radiography imaging
Author(s): Eunae Lee; Dong Sik Kim
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Paper Abstract

In order to observe the noise property of the radiography image detector, the noise power spectrum (NPS) is usually measured. NPS curve can be measured from the average of the periodogram samples. Here, we can improve the measurement accuracy and precision by increasing the number of periodogram samples and spectral resolution. In this paper, we observe the accuracy and precision of the NPS measurement, which is based on the periodograms. For real digital X-ray images, which were acquired from an indirect CsI(Tl)-scintillator radiography detector, we observed the accuracy and precision of the NPS estimates for various resolutions and sample sizes. For a given image size, we could find an appropriate combination of the sample size and spectral resolution from minimizing the mean square error.

Paper Details

Date Published: 22 March 2019
PDF: 5 pages
Proc. SPIE 11049, International Workshop on Advanced Image Technology (IWAIT) 2019, 110491Z (22 March 2019); doi: 10.1117/12.2521620
Show Author Affiliations
Eunae Lee, Hankuk Univ. of Foreign Studies (Korea, Republic of)
Dong Sik Kim, Hankuk Univ. of Foreign Studies (Korea, Republic of)


Published in SPIE Proceedings Vol. 11049:
International Workshop on Advanced Image Technology (IWAIT) 2019
Qian Kemao; Kazuya Hayase; Phooi Yee Lau; Wen-Nung Lie; Yung-Lyul Lee; Sanun Srisuk; Lu Yu, Editor(s)

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