The primary threshold governs the number of faint meteors that are presented to the detection algorithm, so a lower value here is preferable.
阈值的主要制约一些微弱的流星雨是提交给了检测算法，所以较低的价值是可取的。
This article has introduced an improved algorithm variable difference threshold value which is based on gradient.
文章介绍了一种改进的基于斜率的可变差分阈值算法。
Compared with the traditional de-nosing methods by threshold value and translation invariance, the algorithm increases the signal to noise ratio.
与传统的阈值去噪法和基于平移不变量的去噪算法相比，该算法提高了信噪比。
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