I have improved the algorithm of a fast adaptive dynamic threshold algorithm which was used by the former version. So it can solve light region problem and can avoid losing information.

根据系统采集的图象特点，改进了以前提出的一种快速自适应动态阈值分割算法，使之既能很好解决亮区问题又能不丢失信息。

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Discusses the basic theory of PN code parallel fast acquisition of high dynamic in GPS, the method of confirming the auto adaptive threshold and some important problems in acquisition process.

讨论了高动态下GPS伪随机码并行搜索的基本原理，以及自适应门限确定方法与搜索过程中应注意的问题。

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