During the past decade, a liquid crystal spatial light modulator (LCSLM) being researched in optical pattern recognition has aroused lots of attention. We can perform a Fourier transform in parallel and real-time easily with an LCSLM and a lens, which is carried out based on the correlation. Furthermore, the VanderLugt (or matched filter based) correlator (VLC) [11] and the joint transform correlator (JTC) proposed by Weaver and Goodman [12] have been widely used for the optical pattern recognition systems originally. The basic distinction between these techniques is that the VLC depends on Fourier domain matched filtering, whereas JTC depends on spatial domain filtering. Compared with VLC, JTC does not have the stringent filter-alignment problem. Consequently, it is more suitable for real-time processing and more robust in term of environment disturbances. Hence, JTC has become a hot research field in recent years.
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References
Chen C, Chen C, Lee C, Chen C (2004) Constrained optimization on the nonzero order joint transform correlator with the Mach-Zehnder configuration. Opt Commun 231:165–173
Cheng C, Tu H (2002) Implementation of a non-zero order joint transform correlator using interferometric technique. Opt Rev 9:193–196
Chen C, Fang J (2000) Cross-correlation peak optimization on joint transform correlators Opt Commun 178:315–322
Chen C, Fang J (2001) Chinese seal imprint recognition with joint transform correlators. Opt Eng 40:2159–2164
Deutsch M, Garcia J, Mendlovic D (1996) Multi-channel single-output color pattern recognition by use of a joint-transform correlator. Appl Opt 35:6976–6982
Hecht E (2002) Optics. 4th edition, Reading, Mass., Addison-Wesley, pp 136–137
Javidi B, Kuo CJ (1988) Joint transform image correlation using a binary spatial light modulator at the Fourier plane. Appl Opt 27:663–665
Li C, Yin S, Yu FTS (1998) Non-zero order joint transform correlator. Opt Eng 37:58–65
Lu G, Zhang Z, Wu S, Yu FTS (1997) Implementation of a non-zero order joint transform correlator by use of phase shifting techniques. Appl Opt 36:470–483
Mahalanobis A, Kumar BVKV, Casasent D (1987) Minimum average correlation energy filters. App Opt 26:3633–3640
VanderLugt A (1964) Signal detection by complex spatial filtering. IEEE Trans Inf Th IT-10:139–146
Weaver CS, Goodman JW (1966) A technique for optically convolving two functions. Appl Opt 5:1248–1249
Wu C, Chen C, Fang J (2002) Constrainted optimization for color pattern recognition with a non-zero order joint transform correlator. Microwave Opt Tech Lett 33:385–388
Wu C, Chen C (2003) Performance comparison between multichannel polychromatic and conventional joint transform correlators. Opt Eng 42:1758–1765
Yu FTS, Lu G, Lu M, Zhao D (1995) Application of position encoding to complex joint transform correlator. Appl Opt 34:1386–1388
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Lee, C., Chen, C. (2008). Distortion Tolerant Color Pattern Recognition by Using Mach-Zehnder Joint Transform Correlator with Image Encoding Technique. In: Huang, X., Chen, YS., Ao, SI. (eds) Advances in Communication Systems and Electrical Engineering. Lecture Notes in Electrical Engineering, vol 4. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-74938-9_35
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