Outside-vehicle monitoring system
View Patent ↗The present invention includes a stereo camera for picking up a couple of images of outside a vehicle and a far-infrared sensor for detecting the temperature of an object outside the vehicle at least in a detection field overlapping a view field of the stereo camera in the vehicle-width direction. A stereo-image processing unit recognizes three-dimensional objects based on the couple of images and extracts a prospective pedestrian from the recognized three-dimensional objects. A pedestrian-determination unit determines whether or not the prospective pedestrian is a real pedestrian based on a temperature-detection value detected in the same direction the prospective pedestrian exists, where the temperature-detection value is obtained through the far-infrared sensor.
1. An outside-vehicle monitoring system comprising:
a three dimensional visual light image-pickup device that generates a signal representative of an image of an object outside a vehicle by using solid state image pickup elements;
a three-dimensional-object recognition processor that recognizes a three-dimensional object outside the vehicle by processing the signal representative of the image generated by the three dimensional visual light image-pick up device and detects a prospective pedestrian by extracting three-dimensional object data from the recognized three-dimensional object and comparing the extracted three-dimensional object data with a predetermined width-range;
a plurality of thermal infrared elements that detect a temperature value of the recognized three dimensional object detected by the three dimensional visual light image-pickup device in a detection field overlapping a field of view of the three dimensional visual light image-pickup device, the plurality thermal infrared elements being arranged in a line along a width-direction of the vehicle; and
a pedestrian-determination processor coupled to said three-dimensional-object recognition processor and said plurality of thermal infrared elements that determines whether the prospective pedestrian is an actual pedestrian according to fluctuations in the value of the detected temperature in a detection-direction at which the prospective pedestrian was detected,
wherein the pedestrian-determination processor determines the prospective pedestrian is the actual pedestrian when the temperature-detection value detected by the plurality of thermal infrared elements in the detection direction is higher than a predetermined amount of the previous temperature-detection value detected by the plurality of thermal infrared elements in the detection-direction.
2. The outside-vehicle monitoring system according to claim 1 , wherein the three dimensional visual light image-pickup device includes a pair of cameras for picking up the image of an object outside the vehicle from different points of view and the three-dimensional-object recognition processor three-dimensionally recognizes the three-dimensional object based on a couple of images of the same object picked up by the pair of cameras and extracts the prospective pedestrian.