基于声全息方法和双目视觉实现运动声源声场可视化

Video visualization for moving sound sources based on binoculars stereo and acoustical holography

运动声源声场的可视化是一种重要的运动声源定位的技术手段,利用双目视觉测量技术实现运动声源声场空间的自动测量,自动确定运动声源表面的空间位置,针对声源表面,利用传声器阵列,基于声全息方法实现运动声源声场的重建,建立视频图像与声场的空间映射,并建立视频与声场之间的时序,实现实景视频图像与声场重建结果的融合,可以自动生成声源运动过程的视频。基于该方法所开发了一套试验测量系统,对运动声源的测量试验结果表明,该方法可以有效实现运动声源的视频可视化,使人可以直接从视频中看到声源及其变化过程,使声源的定位和识别变得更加简单。

Video visualization method for moving sound sources is very important for the identification and localization for the moving sound sources. The spatial positions in the sound filed measurement of moving sources are measured by an automated method based on the binoculars stereo technique, the spatial coordinates of the surface of the moving sound source are determined automatically; and the sound field of the surface of the moving source is reconstructed with a microphone array using the acoustic holography method for moving sound sources; the spatial mapping between the sound field and the video images is constructed, and also the time sequence of the sound field and the images is founded; then the reconstructed sound field and the real-world images are merged, and the visualized sound field video of the moving source is generated automatically. A sound field measurement system based on this method was developed, the measurement results of moving sound source with this system indicate that the sound field video visualization is realized effectively with the proposed method, the sound sources and their changing process can be seen directly from the generated video, the identification and localization for the moving sound sources can be easier with this method.