5 papers
Debiased Opto-electronic Joint Transform Correlator for Enhanced Real-Time Pattern Recognition
Julian Gamboa, Xi Shen, Tabassom Hamidfar +2
Opto-electronic joint transform correlators (OJTCs) use a focal plane array (FPA) to detect the joint power spectrum (JPS) of two input images, projecting it onto a spatial light m…
Shift, Scale and Rotation Invariant Multiple Object Detection using Balanced Joint Transform Correlator
Xi Shen, Julian Gamboa, Tabassom Hamidfar +2
The Polar Mellin Transform (PMT) is a well-known technique that converts images into shift, scale and rotation invariant signatures for object detection using opto-electronic corre…
Automatic Event Recognition Employing Optically Excited Electro-Nuclear Spin Coherence
Shamima Mitu, Xi Shen, Julian Gamboa +2
An analog automatic event recognition (AER) system can be realized by combining the technique of holographic image recognition with the process of temporal signal correlation emplo…
Temporal Scale and Shift Invariant Automatic Event Recognition using the Mellin Transform
Xi Shen, Julian Gamboa, Tabassom Hamidfar +2
The Spatio-temporal holographic correlator combines the traditional 2D optical image correlation techniques with inhomogeneously broadened arrays of cold atoms to achieve 3D time-s…
Ultra-fast Real-time Target Recognition Using a Shift, Scale, and Rotation Invariant Hybrid Opto-electronic Joint Transform Correlator
Xi Shen, Julian Gamboa, Tabassom Hamidfar +2
Hybrid Opto-electronic correlators (HOC) overcome many limitations of all-optical correlators (AOC) while maintaining high-speed operation. However, neither the OEC nor the AOC in…