Statistically defined backgrounds: performance of a modified nonprewhitening observer model.
Statistically defined backgrounds: performance of a modified nonprewhitening observer model.
复制标题
统计定义的背景：改进的非预白化观察者模型的性能。
DOI：
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复制
发表时间：
1994
影响因子：
1.9
通讯作者：
A. Burgess
中科院分区：
文献类型：
--
作者：
A. Burgess
对噪声限制任务（如医学成像中的任务）中人类观察者表现的研究最近已经进展到对一些信号或图像参数进行统计定义的研究。在这些情况下，理想观测器过程通常是非线性的，分析在数学上是难以处理的。为了数学上的方便，提出了两个次优但线性的观测器模型。霍特林观测器是最优的线性模型，已被发现能很好地拟合大多数人类的结果。非预白化（NPW）匹配滤波器也有助于解释一些人为的结果。[J]。选择,Soc。点。A 9,649(1992)]最近报道了在模拟核医学成像系统的实验中，人类在统计定义（块状）背景上叠加白噪声中检测信号的结果。他们发现，Hotelling模型拟合得很好，而简单的NPW匹配过滤器拟合得很差。结果表明，如果在NPW观测器模型中加入一个形状类似于人类对比灵敏度函数的空间频率滤波器，NPW模型也可以拟合他们的数据。最佳拟合是通过使用眼滤镜模型E(f) = f1.3 exp（-cf2）来实现的，选择c以产生4周期/度的峰值。
Research on human-observer performance for noise-limited tasks (such as those found in medical imaging) has recently progressed to investigations in which some signal or image parameters are statistically defined. In these cases the ideal-observer procedure is usually nonlinear, and analysis is mathematically intractable. Two suboptimal but linear observer models have been proposed for mathematical convenience. The Hotelling observer is the optimal linear model and has been found to give a good fit to most human results. The nonprewhitening (NPW) matched filter also has been useful for explanation of some human results. Rolland and Barrett [J. Opt. Soc. Am. A 9, 649 (1992)] recently reported human results for detection of signals in white noise superimposed on statistically defined (lumpy) backgrounds in experiments that simulated nuclear medicine imaging systems. They found that the Hotelling model gave a good fit, whereas the simple NPW matched filter gave a poor fit. It is shown that the NPW model can also fit their data if a spatial frequency filter of a shape similar to the human contrast-sensitivity function is added to the NPW observer model. The best fit is achieved by use of an eye-filter model E(f) = f1.3 exp(-cf2), with c selected to yield a peak at 4 cycles/deg.
DOI：
10.1364/josaa.2.001752
发表时间：
1985-10
期刊：
Journal of the Optical Society of America. A, Optics and image science
影响因子：
--
作者：
K. Myers;H. Barrett;M. Borgstrom;D. Patton;G. Seeley
通讯作者：
K. Myers;H. Barrett;M. Borgstrom;D. Patton;G. Seeley
DOI：
10.1364/josaa.4.002447
发表时间：
1987-12-01
影响因子：
1.9
作者：
MYERS, KJ;BARRETT, HH
通讯作者：
BARRETT, HH
DOI：
10.1364/josaa.9.000649
发表时间：
1992-05-01
影响因子：
1.9
作者：
ROLLAND, JP;BARRETT, HH
通讯作者：
BARRETT, HH