基于二进小波变换的子线段匹配方法研究

提出了一种基于小波变换的子线段匹配方法.该方法利用样条二进小波变换系数在不同尺度下的模极大点能提供在不同尺度下信号急速变化点的位置信息的特点,以该位置点为子线段的端点,采用由粗到细的匹配策略匹配这些端点,根据顺序一致原则,快速匹配子线段两端点之间的点.这种方法较好的解决了匹配精度和匹配速度之间的平衡问题.采用该方法对篦冷机内水泥熟料高度进行测量,实验表明该方法能较精确的得出水泥熟料料层的分布状况.

Research of Sub-line Segment Matching Based on Dyadic Wavelet Transformation

A sub-line segment match method based on the wavelet transformation is presented. It is based on that the multi-scale local maxima of wavelet transform can obtain the locations of the signal sharp variation points at different scales for transformation coefficients of a quadratic spline wavelet. This kind of location points are taken as the endpoints of the sub-line segment. A coarse to fine matching algorithm is applied to match the endpoints. According to the consistent principle, the points between the two endpoints of the sub-line segment are matched quickly. This method proposes a good solution for balance problem between match precision and match speed. The thickness of cement clinker in the cooler is measured using this method. The experiment shows this method can obtain the bed of material distributed condition of the cement clinker precisely.