Systems and Methods of Using Spatial/Spectral/Temporal Imaging for Hidden or Buried Explosive Detection

• US 20100166330A1
• Filed: 11/05/2009
• Published: 07/01/2010
• Est. Priority Date: 11/07/2008
• Status: Active Grant

• Current Assignee: Micro Biz Ventures LLC
• Original Assignee: Micro USA, Inc.
• Inventors: Patterson, Richard, THYAGARAJAN, Kadayam S.
• Granted Patent: US 8,189,860 B2
• Time in Patent Office: Days
• US Class Current: 382/250
• CPC Class Codes: G01J 3/2823 Imaging spectrometer
• CPC Class Codes: G01J 3/36 Investigating two or more bands of a spectrum by separate detectors
• CPC Class Codes: G06V 10/143 Sensing or illuminating at different wavelengths
• CPC Class Codes: G06V 10/56 relating to colour

Abstract

A method and system for increasing the detection, location, identification or classification of objects hidden on the surface or buried below the surface of the ground is disclosed. The method acquires image data in separate IR and/or visible spectral regions simultaneously and converts the data into intensity value arrays for each spectral region. These intensity value arrays are transformed into two-dimensional discrete wavelet transform arrays for each spectral region. The background clutter from the two-dimensional discrete wavelet transform arrays is removed; forming clutter reduced two-dimensional discrete wavelet transform arrays. The inverse two-dimensional discrete wavelet transform is performed on the clutter reduced two-dimensional discrete wavelet transform arrays to form clutter removed intensity value arrays. These arrays are subtracted in a pair-wise mariner to obtain chemical-specific spectral signatures. The processed images are correlated with 3-dimensional matched filters of known emissive signatures of objects to detect the presence of the object.

Claims

1. A method for detecting, identifying or classifying of objects hidden on the surface or buried below the surface of the ground, comprising:

acquiring image data in separate infrared (IR) and/or visible spectral regions simultaneously;

converting the acquired image data into intensity value arrays for each spectral region;

applying a transformation on the intensity value arrays to form two-dimensional discrete wavelet transform arrays for each spectral region;

removing background clutter from the two-dimensional discrete wavelet transform arrays to form clutter reduced two-dimensional discrete wavelet transform arrays;

performing an inverse two-dimensional discrete wavelet transform on the clutter reduced two-dimensional discrete wavelet transform arrays to form clutter removed intensity value arrays;

subtracting the clutter removed intensity value arrays in a pair-wise manner to obtain chemical-specific spectral signatures; and

correlating the chemical-specific spectral signatures with 3-dimensional matched filters of known emissive signatures of objects to detect a presence of the object.

2. The method of claim 1, further comprising:

applying at least one of a 3-dimensional, a 4-dimensional or a 3- and 4-dimensional feature vector space to compare a thermal spectral signature of an inspected soil with a thermal spectral signature of surrounding soil, to determine a disturbed soil condition.