A method for monitoring headway to an object performable in a computerized system including a camera mounted in a moving vehicle. The camera acquires in real time multiple image frames including respectively multiple images of the object within a field of view of the camera. An edge is detected in in the images of the object. A smoothed measurement is performed of a dimension the edge. Range to the object is calculated in real time, based on the smoothed measurement.

A passive altimeter system comprising an angle between a point and a central boresight that is determined from distortion parameters of a lens in an infrared sensor in a countermeasure system on a mobile platform wherein the infrared sensor captures a first image for determining a distance between the platform and one of (i) a ground surface and (ii) a target, and the passive altimeter system further comprising a dimensional distance between two points in the first image that is determined from a secondary source external to the countermeasure system, and a processor to triangulate the distance between the platform and one of (i) the ground surface and (ii) the target based on the dimensional distance and the angle.

The distance estimation device acquires distances from a movable body at a first time and a second time to two ground objects, respectively, and acquires a distance between the two ground objects. Then, the distance estimation device calculates a moving distance of the movable body from the first time to the second time based on the acquired results. Thus, the distance estimation device calculates the moving distance of the movable body using arbitrary ground objects measurable from the movable body.

The distance estimation device acquires distances from a movable body at a first time and a second time to two ground objects, respectively, and acquires a distance between the two ground objects. Then, the distance estimation device calculates a moving distance of the movable body from the first time to the second time based on the acquired results. Thus, the distance estimation device calculates the moving distance of the movable body using arbitrary ground objects measurable from the movable body.

A passive altimeter system comprising an angle between a point and a central boresight that is determined from distortion parameters of a lens in an infrared sensor in a countermeasure system on a mobile platform wherein the infrared sensor captures a first image for determining a distance between the platform and one of (i) a ground surface and (ii) a target, and the passive altimeter system further comprising a dimensional distance between two points in the first image that is determined from a secondary source external to the countermeasure system, and a processor to triangulate the distance between the platform and one of (i) the ground surface and (ii) the target based on the dimensional distance and the angle.

A method for monitoring headway to an object performable in a computerized system including a camera mounted in a moving vehicle. The camera acquires in real time multiple image frames including respectively multiple images of the object within a field of view of the camera. An edge is detected in in the images of the object. A smoothed measurement is performed of a dimension the edge. Range to the object is calculated in real time, based on the smoothed measurement.

A method for monitoring headway to an object performable in a computerized system including a camera mounted in a moving vehicle. The camera acquires in real time multiple image frames including respectively multiple images of the object within a field of view of the camera. An edge is detected in in the images of the object. A smoothed measurement is performed of a dimension the edge. Range to the object is calculated in real time, based on the smoothed measurement.

A wear degree information acquiring device includes a power cable measuring unit which measures a distance from a predetermined position of a vehicle to a wearing part coming into contact with the vehicle among power cables configured to supply power to the vehicle, and a distance from the predetermined position of the vehicle to a non-wearing part not coming into contact with the vehicle among the power cables; and a wear degree information acquiring unit which acquires information indicating a degree of wear of the power cable, on the basis of a difference between the distance from the predetermined position of the vehicle to the wearing part and the distance from the predetermined position of the vehicle to the non-wearing part.

A wear degree information acquiring device includes a power cable measuring unit which measures a distance from a predetermined position of a vehicle to a wearing part coming into contact with the vehicle among power cables configured to supply power to the vehicle, and a distance from the predetermined position of the vehicle to a non-wearing part not coming into contact with the vehicle among the power cables; and a wear degree information acquiring unit which acquires information indicating a degree of wear of the power cable, on the basis of a difference between the distance from the predetermined position of the vehicle to the wearing part and the distance from the predetermined position of the vehicle to the non-wearing part.

A projector includes a first projection unit that projects a first image, a first imager that captures a second image projected by another projector, and a first calculation unit. The first calculation unit calculates, from captured image data of the second image captured by the first imager and interval information indicating an interval between the other projector and the projector, a first distance between a surface on which the second image is projected and the other projector, or a second distance between an area in which the second image is projected and the projector. The first projection unit controls projection of the first image based on the first distance or the second distance.