Estimation of Zero-Frequency Noise Power Density in Digital Imaging

被引：14
|
作者：
Kim, Dong Sik [1 ]
Lee, Eunae [1 ]
机构：
[1] Hankuk Univ Foreign Studies, Dept Elect Engn, Yongin 17035, South Korea
来源：
IEEE SIGNAL PROCESSING LETTERS | 2018年 / 25卷 / 11期
基金：
新加坡国家研究基金会;
关键词：
Radiography imaging; sample mean of perioclograms; zero-frequency noise power density; SPECTRUM;
D O I：
10.1109/LSP.2018.2874510
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Noise power spectrum (NPS) at zero frequency can efficiently represent noise properties of imaging systems. However, estimations of zero-frequency NPS are susceptible to distortion due to several factors leading to low-estimate precisions. In this letter, a high-precision estimate algorithm for zero-frequency NPS is proposed. The proposed estimate is a compensated sum of signal variances and covariances. The accuracy and precision of the proposed approach were first observed with synthetic data. A flat panel radiography detector based on CsI(TI)-scintillator was then used to experimentally observe the improved estimate precision of the proposed algorithm. Experiment results showed that the estimation precision was improved to 14 times compared to that of the conventional method.
引用
收藏
页码：1755 / 1759
页数：5
相关论文
共 50 条
  • [21] Zero-frequency corner modes in mechanical graphene
    Al Ba'ba'a, Hasan B.
    [J]. WAVE MOTION, 2024, 127
  • [22] ZERO-FREQUENCY MASKING AND A MODEL OF CONTRAST SENSITIVITY
    YANG, J
    QI, XF
    MAKOUS, W
    [J]. VISION RESEARCH, 1995, 35 (14) : 1965 - 1978
  • [23] ZERO-FREQUENCY SUSCEPTIBILITY OF SPIN GLASSES AND MICTOMAGNETS
    SMITH, DA
    [J]. JOURNAL OF PHYSICS F-METAL PHYSICS, 1975, 5 (11): : 2148 - 2167
  • [24] Edge extraction using zero-frequency resonator
    Anil Kumar Sao
    B. Yegnanarayana
    [J]. Signal, Image and Video Processing, 2012, 6 : 287 - 300
  • [25] DO ZERO-FREQUENCY MODES CONTRIBUTE TO THE ENTROPY
    SCHIFFER, M
    BEKENSTEIN, JD
    [J]. PHYSICAL REVIEW D, 1990, 42 (10): : 3598 - 3599
  • [26] BOSONIC ZERO-FREQUENCY MODES AND INITIAL CONDITIONS
    FORD, LH
    PATHINAYAKE, C
    [J]. PHYSICAL REVIEW D, 1989, 39 (12): : 3642 - 3646
  • [27] APPLICATIONS OF A ZERO-FREQUENCY SUPERCONDUCTING INDUCTANCE BRIDGE
    MESERVEY, R
    TEDROW, PM
    PARASKEVOPOULOS, D
    [J]. IEEE TRANSACTIONS ON MAGNETICS, 1975, MA11 (02) : 720 - 723
  • [28] RESOLUTION OF ZERO-FREQUENCY MODES INTO FINITE-FREQUENCY MODES
    RYU, CM
    [J]. PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1992, 4 (07): : 2018 - 2020
  • [29] A Novel Method to Measure the Zero-Frequency DQE of a Non-Linear Imaging System
    McDonald, Michael C.
    Kim, Ho Kyung
    Henry, John H.
    Cunningham, Ian A.
    [J]. MEDICAL IMAGING 2011: PHYSICS OF MEDICAL IMAGING, 2011, 7961
  • [30] Power System Frequency Estimation by Reduction of Noise Using Three Digital Filters
    Hwang, Jin Kwon
    Markham, Penn N.
    [J]. IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 2014, 63 (02) : 402 - 409
12345