Device for setting target vehicle, system for setting target vehicle, and method for setting target vehicle

A system for setting a target vehicle comprising:

• a detection signal acquisition device capable of acquiring a first detection signal representing an object by an image, and a second detection signal representing the object by a reflection point;
• and
• a setting control unit which determines whether to set a forward object as a target vehicle, wherein
• if a movement history, which indicates that the forward object has been detected as a mobile object, is not associated with the forward object, and a combination history, which indicates that the forward object has been determined to be a vehicle using a combination of the first detection signal and the second detection signal, is associated with the forward object, then as a selection threshold of a first determination parameter for determining whether to set the forward object as the target vehicle, a selection threshold is used such that the forward object is less likely to be selected as the target vehicle than a selection threshold which would be used if a movement history is associated with the forward object, wherein
• a first detection unit that outputs the first detection signal;
• and
• a second detection unit that outputs the second detection signal.