A Computerized Acoustic Imaging Technique Incorporating Automatic Object Recognition

摘要

A computerized technique combining backward wave propagation and an automatic edge detection scheme is developed and tested. The class of objects considered is limited to those with edge boundaries since it is shown that a universal automatic reconstruction cannot be obtained for all possible objects. Using samples of the acoustic diffraction pattern as input this technique enables the computer to predict the most likely locations of objects and to produce graphical output of the objects. A discussion is given on implementing the diffraction equations on the computer. A simplified edge detection scheme conserving both memory space and computer time is described. Test results are presented for both computer generated diffraction patterns and one set of experimental data. (Author)