EXPERIMENTAL COMPARISON OF BINARY JOINT TRANSFORM CORRELATORS USED FOR FINGERPRINT IDENTIFICATION

We compare the experimental performance of 12 variations of the binary joint transform correlator (BJTC) when used for fingerprint identific ation. Three hardware architectures were used: a single spatial light modulator (SLM) BJTC, a BJTC using two input SLMs, and a chirp-encoded BJTC using two input SLMs. These correlators were implemented on the same hardware setup with minor modifications. With each hardware confi guration, four binarization techniques were implemented: global thresh old, Fourier plane windowing, frame subtraction, and frame subtraction followed by windowing. A set of 10 experiments was used to characteri ze the output peak intensity, peak-to-noise ratio, and discrimination ratio. The same set of experiments was run on each of the 12 correlato r variants. (C) 1996 Society of Photo-Optical instrumentation Engineer s.