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20 September 2016 Space object detection: receiver operating characteristics for Poisson and normally distributed data
Richard McMurry
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Proceedings Volume 9982, Unconventional Imaging and Wavefront Sensing XII; 99820X (2016) https://doi.org/10.1117/12.2237833
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States
Abstract
Object detection algorithms typically implement a Likelihood Ratio Test (LRT) for determining if an image-pixel contains a star. Implementing a LRT requires prior knowledge about the statistics of the data, such as the mean and variance. Assuming the background noise follows a Gaussian distribution, the mean and the variance have to be calculated separately. If the background data follows a Poisson distribution, the mean is the only calculation needed, as mean and variance of the Poisson distribution equal each other. This paper will compare the possible detection improvements when using a Poisson assumption. Many star detection LRTs will use a windowing technique to limit the amount of background data that is being tested. Various window sizes will also be tested to determine possible detection improvements that can be realized.
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Richard McMurry "Space object detection: receiver operating characteristics for Poisson and normally distributed data", Proc. SPIE 9982, Unconventional Imaging and Wavefront Sensing XII, 99820X (20 September 2016); https://doi.org/10.1117/12.2237833
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KEYWORDS
Stars
Signal to noise ratio
Image processing
Space telescopes
Space telescopes
Telescopes
Detection and tracking algorithms
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