Patent ID: 9671521
Date: 2017-06-06
CPC Classifications: G01V

Claim:
1. A method of locating objects buried under ground, comprising steps of: insonifying the ground with a system which can distinguish buried objects, forming a raw image of the ground with a laser interferometer, preprocessing the raw image with a computer to form a preprocessed image comprising a plurality of pixels arranged in rows and columns, processing the pixels in the rows and columns of the preprocessed image with a computer, wherein the processing step comprises calculating one or more derivatives having one or more peaks, comparing magnitudes of the one or more peaks to a threshold peak value, mapping the one or more derivatives and the one or more peaks having a magnitude above the threshold peak value to create a derivative map, analyzing the derivative map to detect a cluster of pixels that have a number of peak within a range for a defined pattern, detecting anomalous signatures in the derivative map based on the cluster of pixels, identifying a location of a centroid pixel of the cluster of pixels which correlates to a location of the detected anomalous signature, and demarcating locations on said preprocessed image that correspond to said anomalous signatures.