利用支持向量回归插值减少全息面测量点数方法的试验研究

近场声全息要获得较高的重建精度必须在全息面上大孔径范围内进行密集的数据采集,需要大量的测量点,测量任务十分繁重。因此在保证重建精度的前提下研究如何有效地减少全息面测量点数对NAH的意义十分重大。提出一种利用支持向量回归对全息面进行插值的方法,该方法可以在全息面传声器数目较少时通过插值提高重建精度,因而可大幅地减少全息面的测量点数。试验表明该方法是有效的。

Experimental study on reduction of measuring points number on hologram using support vector regression

In near-field acoustic holography (NAH),accurate reconstruction requires dense measurement grid on large hologram,and so a huge number of microphones are usually demanded.It is significant to find a way to reduce the microphones number effectively while keeping high reconstruction accuracy in NAH implementation.A hologram interpolation approach based on support vector regression (SVR) was presented in the paper.Reconstruction accuracy can be improved significantly with small number of microphones.Therefore,...