Optical Fourier processor and point-diffraction interferometer for moving-object trajectory estimation.

@article{Lane1999OpticalFP,
  title={Optical Fourier processor and point-diffraction interferometer for moving-object trajectory estimation.},
  author={Pierre M. Lane and Michael {\vC}ada},
  journal={Applied optics},
  year={1999},
  volume={38 20},
  pages={
          4306-15
        }
}
A hybrid optical-digital signal processing system that estimates the trajectory of moving targets in a two-dimensional field at video frame rates was developed and constructed. The hybrid system is particularly well suited to the trajectory estimation of small, barely discernable, moving objects of unknown position and velocity in high-resolution image sequences. The system uses an optical Fourier processor and a point-diffraction interferometer to calculate the frequency-domain representation… 
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11 Citations

The complex-valued optical fourier transform and its application to moving-object trajectory estimation
This dissertation investigates interferometric optical Fourier processors for the purpose of computation. Both processors contain a conventional optical Fourier processor and employ a common-path…
Detecting the Trajectory of Moving Object for Single-Pixel Imaging System
TLDR
The computer simulation results prove the effect validity of the proposed algorithm and the reflective intensity of the object can be change due to the reflective angle change caused by the motion in some situations.
Motion estimation through the atmosphere using spatiotemporal Fourier transform
TLDR
The movement description of translating targets in time-varying images detected through the atmosphere is a relevant topic with application in many different fields and the evaluation of the spatiotemporal Fourier transform of a sequence of frames is applied.
Interferometric optical fourier-transform processor for calculation of selected spatial frequencies.
TLDR
A novel interferometric optical Fourier-transform processor is presented that calculates the complex-valued Fourier transform of an image at preselected points on the spatial-frequency plane and is demonstrated in a moving-object trajectory estimation system.
Fiber point diffraction interferometer for measuring spherical surface
An advanced fiber point diffraction interferometer (FPDI) for measuring spherical surface has been developed. It is designed for measuring EUV spherical mirrors with high precision. The quality of…
Application of Fiber Point Diffraction in Measurement of Optical Surface
The fiber point diffraction technology is applied in interferometer to measure optical surface with high precision. The wavefront diffracted from the single mode fiber with microns core diameter can…
Four-dimensional flash trajectory imaging using time-delay-modulated range-gated viewing.
TLDR
In the method, time-delay-modulated range-gated viewing with multiple exposures is presented so that the time evolution of object trajectories free from background interference is directly given without complicated image processing and the motion parameters of objects can be estimated.
Rigorous accuracy analysis of the fiber point diffraction interferometer
The fiber phase shifting point-diffraction interferometer (FPS/PDI) has recently been designed to measure spherical surface with high precision. The wavefront shape emerging from the fiber, which…
Key Factors in Fiber Point Diffraction Interference Technology for Measuring Surface
The point diffraction interferometer (PDI), which generates the nearly ideal spherical wavefront with the pinhole method, is realized the absolute interferometric measurement without the use of…
Temporal Parameter Optimization in Four-Dimensional Flash Trajectory Imaging
In four-dimensional flash trajectory imaging, temporal parameters include time delay, laser pulse width, gate time, pulse pair repetition frequency and the frame rate of CCD, which directly impact on…
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References

SHOWING 1-10 OF 23 REFERENCES
Moving object trajectory estimation using an optical Fourier processor
A vision system that estimates the trajectory (velocity and direction) of moving targets in a 2D field at video frame rates has been developed and constructed. The system uses an optical Fourier…
Moving object detection and trajectory estimation in the transform/spatiotemporal mixed domain
  • K. S. Knudsen, L. Bruton
  • Physics, Mathematics
    [Proceedings] ICASSP-92: 1992 IEEE International Conference on Acoustics, Speech, and Signal Processing
  • 1992
TLDR
A novel discrete transform/spatiotemporal mixed domain, or MixeD, moving object detection and trajectory estimation algorithm is introduced that is able to discriminate several moving objects in an image sequence, and to provide accurate estimates of their trajectories.
A new technique for velocity estimation of large moving objects
TLDR
This technique is based on analyzing the Hartley transform spectrum of the image sequence directly, instead of using it to compute other transforms, and is faster than other techniques based on the Fourier transform.
The enhancement and tracking of moving objects in digital images using adaptive three-dimensional recursive filters
TLDR
Experimental evidence is provided showing the effectiveness of the adaptive filter control system in locating, tracking and enhancing objects in images containing other objects and high levels of noise.
Recognition and velocity computation of large moving objects in images
TLDR
Analytical formulations for large moving objects in a time sequence with zero background are presented and an algorithm is given for velocity formulation.
Moving object nonlinear trajectory estimation in the transform/spatiotemporal mixed domain
  • K. S. Knudsen, L. Bruton
  • Mathematics, Engineering
    [Proceedings] 1992 IEEE International Symposium on Circuits and Systems
  • 1992
Presents a discrete transform/spatiotemporal mixed domain nonlinear trajectory estimation algorithm. The trajectory of an object moving in an image sequence is modeled by quadratic polynomials. The…
Computer Tracking of Moving Point Targets in Space
  • N. C. Mohanty
  • Physics
    IEEE Transactions on Pattern Analysis and Machine Intelligence
  • 1981
An adaptive algorithm based on the maximum likelihood ratio is described in this correspondence. The algorithm detects low-intensity targets and tracks their paths. The charged-coupled device (CCD)…
Application of Three-Dimensional Filtering to Moving Target Detection
TLDR
It is shown that the problem of tracking a target having a fixed velocity can be cast into a general framework of three-dimensional filter theory and the design of these filters is presented, taking into account the target, clutter, and optical detection models.
The detection of unresolved targets using the Hough Transform
A Frequency Domain Algorithm for Multiframe Detection and Estimation of Dim Targets
TLDR
An algorithm for detecting moving targets by imaging sensors and estimating their trajectories using directional filtering in the frequency domain, using a bank of filters for all possible target directions, resulting in an improved signal-to-noise ratio.
...
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