Traditional matched filter-based correlator needs to make matched filter in advance, which has many disadvantages, such
as large calculation and slow speed. The more important thing is that it is not suitable for real-time processing and
recognition precision is also very low. In this paper, the method of optical joint transform correlation (JTC) is presented,
which can recognize targets in real time with higher precision.
In JTC, Electricity Addressed Liquid Crystal Display (EALCD) is adopted as spatial light modulator, which has the
feature of high resolution. It can record not only objects and images of optical system, but also joint image of target and
template stored in computer beforehand. In the experimental system, EALCD is the key device to realize optical
correlation. Two area array CCD are used to record the joint transform spectrum (JTS) and correlation peaks image
respectively. By the coordinate of correlation peaks, the position of the target can be determined.
Comparatively, stationary targets can be detected and recognized easily by JTC. When targets get moving, the intensity
of the correlation peaks of joint image turns weak. Sometimes we even can't get them. Thus, an effective method is
needed to solve the problem. In this paper, dynamic templates are applied to realize tracking the targets. Temporal state
of targets will be used as new templates. According to the experiments, good tracking results are achieved.