Position-invariant two-dimensional image correlation using a one-dimensional space integrating optical processor: application to security verification

Bahram Javidi; Jun Wang

doi:10.1117/1.600852

1 September 1996 Position-invariant two-dimensional image correlation using a one-dimensional space integrating optical processor: application to security verification

Bahram Javidi, Jun Wang

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Optical Engineering, Vol. 35, Issue 9, (September 1996). https://doi.org/10.1117/1.600852

We describe a 1-D space integrating optical processor that can perform position-invariant 2-D image correlation by 1-D scanning the input image over a 2-D reference image along a coordinate axis, which we shall refer to as the x axis in a Cartesian coordination system. The 2-D reference function is a position-invariant filter that is designed using distortion-invariant pattern recognition techniques to provide tolerance to misalignments along the y axis between the input image and the reference function during the 1-D spatial correlation. Applications of this system to phase-encoded image recognition and fingerprint recognition are described.

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Bahram Javidi and Jun Wang "Position-invariant two-dimensional image correlation using a one-dimensional space integrating optical processor: application to security verification," Optical Engineering 35(9), (1 September 1996). https://doi.org/10.1117/1.600852

Published: 1 September 1996

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