engleski

Use of a multifunctional extended optical correlator for cuneiform inscription analysis

Ancient cuneiform inscriptions are remains of historic and cultural value. The characterization of cuneiform signs by means of detection, feature enhancement, feature extraction, and identification is therefore of special interest. To analyse cuneiform inscriptions a multifunctional experimental device was advanced, enabling correlation experiments to be performed including an automatic prefiltering procedure. The use of methods minimizing the in-class objects sensitivity while maximizing the discrimination ability for out-of-class objects is indispensable due to the inherent sensitivity of the classical matched spatial filtering approach. An original technique for coherent optical averaging is introduced. It provides analog average objects taken from a training set of in-class objects. The in-class and out-of-class correlation sensitivities are compared for different types of matched spatial filters including classical single sign filter, multiplexed filter, and filters obtained from optically and digitally averaged objects.

optical correlator; optical pattern recognition

nije evidentirano