The other is to design a morphological filter with disk structuring elements in different size applying to pitch contrail smoothing.
其二是采用圆盘形结构元素设计的用于基音周期轨迹平滑的形态学滤波器。
参考来源 - 语音信号处理中的数学形态学方法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
A constructing approach is presented for grayscale morphological operators with grayscale structuring elements.
提出了采用灰度结构元图像的灰度形态算子的构造方法。
On the basis of the characteristics of the IR images, an algorithm of background estimation based on grayscale morphology with multiple structuring elements is presented.
该文在分析红外图像统计特征的基础上，提出了一种基于多结构元素灰度形态学的红外背景估计算法。
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