提高白天观测星体信噪比的方法研究
Improvement of signal to noise ratio in astronomical objects detection in daytime
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摘要: 为提高对天体目标的检测概率，对多种可提高探测器检测概率的途径进行了研究。研究结果表明：光谱滤波技术能有效提高信噪比。为得到大的探测对比度和信噪比，需合理选取探测系统视场，应保证目标像所占像素个数不小于2×2；还应令系统在不加衰减器的情况下，电荷耦合器件（CCD）接近饱和并保证CCD不饱和。结合探测系统视场的选取，利用形态学方法对图像进行处理，将大大提高探测信噪比，从而大大提高检测概率。Abstract: Detection for a faint astronomical object in daytime is an extremely complex issue because of low targetbackgroundcontrast and low signaltonoise ratio. Some ways to improve the detection probability is studied in this paper. The results show, spectral filtering technology is an effective way to improve signaltonoise ratio. The reasonable choice of field of view is helpful to get higher signaltonoise ratio and contrast. With the reasonable choice of field of view and the effective application of morphologybased detection algorithm, the detection efficiency could be greatly improved.
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Key words:
- faint astronomical objects /
- detection efficiency /
- daytime /
- image processing /
- signaltonoise ratio
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