Rule of minimum fractal dimension for GPR ground bounce removal

For the problem of the imprecise estimation of the reference of GPR ground bounce wave and relying on a priori knowledge, the criteria on minimum fractal dimension is introduced to select the reference to the ground bounce wave automatically. First, the detection direction of the fractal dimension curve is achieved by the the box-counting dimension of A-scan for a given ground-penetrating radar B-scan. Compared with the fractal dimension of the average trace of the B-scan, the trace of minimum fractal dimension or the trace which is averaged by the traces whose fractal dimension is less than the one of average trace, is selected as the reference ground bounce wave. Experimental results show that the method can preserve more energy of probable target area and more effective than the one of average trace.