| 摘要 |
<p>PURPOSE:To detect only a received video signal of small area such as an air craft and to detect its position automatically by handling received video signals as a two-dimensional image and finding the area and gravity center position of each area number given to a group of the same received video signals. CONSTITUTION:The received video signal is converted by a binarization circuit 23 into a binary video signal 24. Then, binary video signals 24 in a two-dimensional array are given an area number 26 by an area number giving circuit 25. Further, an area measuring circuit 28 measures the area of each area number and a gravity center detecting circuit 27 detects the center of gravity of received video signals of each area number. Then, a target decision circuit 33 nullifies the center position of gravity of a target having large area on the basis of the mesured area of the area number and signifies the center point of gravity of a target having small area to detect the center position of gravity of the signified target, detecting the point target such as an aircraft automatically.</p> |
