PURPOSE:To enable the realization of a firearms control apparatus or a missile guiding apparatus capable of simultaneously tracking a plurality of targets and the application of the titled circuit to an apparatus for measuring or acquiring a plurality shapes in a real time, by performing that a plurality of targets in an image are mutually separated by numbering in a real time. CONSTITUTION:In a region number control part 12 in which a multi-value video signal is received, the video signal binary-coded by a threshold is stored as the content 8 of a region number control register and multiplied by target detection windows A-E to control region numbering according to the logic of a specific formula. Because it is necessary to apply a new number in a picture element satisfying a certain specific formula, an order is issued to a new region number generating part 13 from the region number control part 12 to generate a new region number which is, in turn, transmitted to and stored in a first register 14 as well as stored in a register line 15 through the first register 14 while sent to a region finish detecting part 19 and a flag for detecting region finish is erected.
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