Sensitivity of the nonlinear joint transform correlator: experimental investigations.

Experiments are provided to investigate nonlinear joint transform correlator sensitivity to scaling and rotation changes of input objects for various degrees of nonlinearity applied to the joint power spectrum. The experimental results for the images used here show that a severe nonlinear transformation of the joint power spectrum increases the sensitivity of the correlation peak intensity to scaling and rotation changes of input objects. However, the correlation peak-to-sidelobe ratio of the nonlinear joint transform correlator remains higher than the linear joint transform correlator. These experiments indicate that, in the presence of input signal rotation or scale changes, the performance of the nonlinear joint transform correlator may be better than the linear joint transform correlator. The effect of the modulation transfer function of the spatial light modulator on the nonlinear joint transform correlator performance in the presence of multiple input targets is discussed.

[1]  Bahram Javidi,et al.  Experiments on nonlinearly transformed matched filters , 1992 .

[2]  Joseph L. Horner,et al.  1-F Binary Joint Transform Correlator. , 1990 .

[3]  Kenneth H. Fielding,et al.  Detector quantization effects in a binary joint transform correlator , 1990, Optics & Photonics.

[4]  B Javidi,et al.  Experiments on nonlinear joint transform correlator using an optically addressed spatial light modulator in the Fourier plane. , 1991, Applied optics.

[5]  Bahram Javidi,et al.  Comparison on nonlinear joint transform correlator and nonlinear matched filter based correlator , 1990 .

[6]  J. Horner,et al.  Single spatial light modulator joint transform correlator. , 1989, Applied optics.

[7]  J L Horner,et al.  Metrics for assessing pattern-recognition performance. , 1992, Applied optics.

[8]  Bahram Javidi,et al.  Comparison of nonlinear joint transform correlator and nonlinearly transformed matched filter based correlator for noisy input scenes , 1990 .

[9]  J. Goodman,et al.  A technique for optically convolving two functions. , 1966, Applied optics.

[10]  B. Javidi.  Nonlinear joint power spectrum based optical correlation. , 1989, Applied optics.

[11]  A. Lugt,et al.  The use of film nonlinearities in optical spatial filtering. , 1970, Applied optics.

[12]  Adam Kozma,et al.  Photographic Recording of Spatially Modulated Coherent Light , 1966 .

[13]  B Javidi,et al.  Multiple-object binary joint transform correlation using multiple-level threshold crossing. , 1991, Applied optics.

[14]  H. B. Brown,et al.  Application Of The Liquid Crystal Light Valve To Real-Time Optical Data Processing , 1978 .