Patent ID: 7460686
Filing Date: 2008-12-02
Classification: B61L

Abstract:
1. A safety monitoring device in a station platform, the safety monitoring device comprising: image processing means for picking up a platform edge through a plurality of stereo cameras at the platform edge on a railroad-track side of a station and generating image information based on a picked-up image in a view field and distance information based on a coordinate system of the platform per stereo camera, means for recognizing an object based on distance information and image information transmitted from each of the stereo cameras, and means for confirming safety according to the state of the recognized object; wherein the means for recognizing the object based on the distance information and the image information transmitted from each of the stereo cameras performs recognition using a higher-order local autocorrelation characteristic, said higher-order local autocorrelation characteristic is used for determining whether ahead and behind time-series distance information existing at predetermined positions in a predetermined area pertains to a same person, and the predetermined positions correspond to a plurality of blocks obtained by dividing the predetermined area, and a next search for the time-series distance information is performed by calculating the higher-order local autocorrelation characteristic for at least two blocks of said plurality of blocks.