Apparatus for detecting a obstacle in a road crossing and controlling method thereof using a moving track of an object

PURPOSE: An obstacle image detecting device of a railroad crossing danger area using a mobile track of an object for reducing error rate by the change of illuminance is provided to prevent the damage of property and the human life at the railroad crossing by detecting an interest object. CONSTITUTION: A difference image signal operator(20) obtains difference image signals between video frames. A moving area detector(30) detects a moving area from the difference image signals. A still area detector(40) detects a stationary zone from the difference image signals. An interest object extractor(60) extracts an interested object. A path extractor extracts routing information of the interested object. If the interested object has in the danger area of the railroad crossing, an image detection controller outputs the alarm signal through a warning unit.