zero-crossings 过零点
zero crossings detection 零交叉检测
Back-EMF zero crossings 反电势过零点
zero-crossings representation 过零点表征
multiresolution zero crossings 多分辨率零交叉
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。
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 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。
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