The Laplacian method searches for zero crossings in the second derivative of the image to find edges.
拉普拉斯算子的方法是在图像的二阶导数搜索零交叉来查找边缘。
The zero-crossings of the AC voltage and digital frequency synthesizer are used in solving the two main problems in frequency hopping system-synchronization and fast frequency synthesizing.
利用电力系统三相交流电压过零点和高速数字频率合成器解决了跳频系统中同步和快速频率合成的两个关键问题。
In the other, we use the particular attributes of zero-crossings as constraint in coarse matching, which can improve the matching speed.
另一方面，使用过零点的特有属性作为粗匹配的匹配约束，可以提高匹配速度。
The algorithm of measuring zero-crossings can better solve the problems that the characteristic parameters of the pulse signal are complicated in the time field and the measuration errors are greater.
提出的过零点检测算法，较好解决了脉搏信号时域特征点参数多，分析复杂，误差较大的问题。
After counting the crossings, if the result is zero then the point is outside the path.
计算交点的数目后，如果结果为零，则说明该点位于路径外部。
After counting the crossings, if the result is zero then the point is outside the path.
计算交点的数目后，如果结果为零，则说明该点位于路径外部。
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