质心
点扩散函数
光学
截断(统计)
泊松分布
高斯分布
光传递函数
物理
噪音(视频)
散粒噪声
算法
计算机科学
数学
人工智能
图像(数学)
统计
探测器
量子力学
出处
期刊:Applied optics
[The Optical Society]
日期:1999-11-10
卷期号:38 (32): 6737-6737
被引量:68
摘要
The problem of estimating the centroid of an incoherently imaged point with a CCD array is analyzed. An exact analysis is presented that uses the actual short-exposure function at the CCD instead of the traditional Gaussian approximation. The analysis shows that, for Poisson noise, the centroid variance depends on the CCD size and that truncation effects play a significant part in determining the optimum CCD size. The effects of this on a wave-front reconstruction formed by a Shack-Hartmann sensor are described.
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