Laser Speckle Photography for Surface Tampering Detection
First Claim
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1. A method comprising:
- projecting, from a projector, coherent illumination on an object;
capturing, with a first camera in a particular location, a reference image of the object while the diffused laser is projected on the object;
capturing, with a second camera positioned in the particular location, a test image of the object while the coherent illumination is projected on the object; and
comparing speckles in the reference image to the test image;
wherein the projector, first camera and second camera are removably provided to and positioned in a site of the object.
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Abstract
In one embodiment, a method comprises projecting, from a projector, a diffused on an object. The method further includes capturing, with a first camera in a particular location, a reference image of the object while the diffused is projected on the object. The method further includes capturing, with a second camera positioned in the particular location, a test image of the object while the diffused is projected on the object. The method further includes comparing speckles in the reference image to the test image. The projector, first camera and second camera are removably provided to and positioned in a site of the object.
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Citations
20 Claims
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1. A method comprising:
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projecting, from a projector, coherent illumination on an object; capturing, with a first camera in a particular location, a reference image of the object while the diffused laser is projected on the object; capturing, with a second camera positioned in the particular location, a test image of the object while the coherent illumination is projected on the object; and comparing speckles in the reference image to the test image; wherein the projector, first camera and second camera are removably provided to and positioned in a site of the object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system comprising:
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a projector configured to project coherent illumination on an object; a first camera in a particular location configured to capture a reference image of the object while the coherent illumination is being projected; a second camera positioned in the particular location and configured to capture a test image of the object; and a correlation module configured to compare speckles in the reference image to the test image; wherein the projector, first camera and second camera are removably provided to and positioned in a site of the object. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification