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(28) Effects of threshold on multiple-target detection by using a modified amplitude-modulated joint transform correlator

P. Kaewkasi, J. Widjaja and J. Uozumi
Optical Engineering, Vol.47, No.1, pp.017206-1 - 017206-12, 2008-1


 Effects of threshold value on multiple-target detection performance of the modified amplitude-modulated joint transform correlator are studied on the basis of computer simulations using human fingerprint and face images. Correlation outputs are quantitatively measured by means of a primary-to-secondary peaks ratio and a peak-to-correlation deviation ratio. The simulation results reveal that the detection of high-contrast targets can be optimized by using low threshold. In the case of low-contrast targets, the optimization depends on spatial-frequency contents and noise.

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