The paper USES the concept of Minimum error probability, to obtain the object probability parameter from square diagram, to get the method of the optimal threshold in images analysis.

利用最小错误概率的概念，利用直方图得到目标的概率参数，得到车牌图像分析中最优的阈值的选取方法。

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A simple and convenient method to calculate the location error is given, which is named by this author the process data extreme positions diagram method.

给出一种计算定位误差的简便方法，笔者称之为工序基准极位简图法。

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And a new recursion method is put forward with computation block diagram given and error analyzed.

提出了参考车速的递推算法，给出了计算框图，进行了误差分析。

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