Abstract
The detection of specified target patterns in a noise image is described that was performed by optical matched filtering technique using a coherent optical system, in which a thermoplastic optical recording device was used for recording the filter. The noise image in which the target patterns were embedded was of perfectly random nature. And it is shown that the thermoplastic optical recording device has characteristics appropriate for recording holographic matched filters and effectively detects the targets in noise images. In the present experiments, the signal-to-noise ratio of 10 in the output image was obtained from the input noise image in which the targets were almost embedded, i. e. the signal-to-noise ratio of 1.
