| 摘要 |
<p>PURPOSE:To enable elimination of processing separately of a singly covered area and a duplucatively covered area by producing one raster scanning image and by applying afterimage processing for past image of the raster scanning image. CONSTITUTION:A afterimage processing circuit 3 inputs the newest image of a raster scanning method by a raster scan conversion circuit 2, and concurrently produces an image for detection of an object, through downgrading brightness level which consists of multi grades, for the past image of one scanning before. In this way, by producing one image even for a plurality of radar coverage areas, by the raster scan conversion circuit 2, complicated identification process is not required and separate processing of a singly covered area and a duplicatively covered area can be eliminated.</p> |
