Three line scanner, modern airborne sensor and algorithm of vehicle detection along mega-city street

On-street traffic problems because of number of vehicles increasing in mega-cities around the world become more serve sharply year by year. To monitor and solve traffic problems on the long ranges, the intelligent transportation systems, ITS, are emerged simultaneously. The important and prevalent one of sub systems of ITS is the road monitoring by remote sensing techniques from both airborne and spaceborne sensors because image by remote sensor distributes a top-view and wide-area observation compared with other side-view sensor installed along the road such as video camera etc. and thus by remote sensor, nowadays, high-resolution images are available and distribute their merit for traffic problems in a variety of cases including the illegal parking. Especially, image from airborne sensor is the way to resolve without a problem of cloud-covered images with good weather and good visible time selected for image taking. Recently, three line scanner or TLS, novel airborne sensor, has emerged. Three line scanner imaging systems consisting of three-parallel one-dimensional CCD cameras mounted on the imaging plane with a stabilizer for shaking reduction during imaging flight. It obtains seamless high-resolution images (5-10 cm on the ground) with three viewing directions (forward, nadir, backward direction) simultaneously accurately with RTK-GPS and INS. With centimeter-order ground resolution and seamless imaging capability along the road, TLS image is very suitable to analyze traffic problems in the urban area of the mega city. Therefore the TLS application of the vehicle detection on the street in Mega City, here Tokyo has been developed under the advantage of three line scanner image and thus the framework of this research that, has been created, consists of three processing stages mainly: pre-processing, vehicle detect