| 摘要 |
PURPOSE:To calculate a correlation with a high accuracy by using all bits of an original image, by executing the correlation processing by a data of a multilevel, and obtaining a result of the correlation by a binary data. CONSTITUTION:An image signal is sampled by an A-D converter 10, and inputted to a data input terminal of an IXL local parallel correlator group 300 through a gate circuit 15. At the same time, an image of a template is read out of a frame memory 20, and inputted to a reference data input terminal of the IXL local parallel correlator group 300 through a gate circuit 45. The number of correlated pixel number outputted from the IXL local parallel correlation group 300 is calculated by a one picture portion by a counter 40, and a result of its calculation is inputted to a microcomputer 35 through a parallel interface 45. The IXL local parallel correlator group 300 has a distributed digital correlator group for calculating a mutual correlation of all (n) bits in a two-dimensional local parallel and a counting-up circuit.
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