Inter-vehicle distance estimation method and inter-vehicle distance estimation device

Abstract

An inter-vehicle distance estimation method estimates a screened area that is screened by an obstacle from a sensor and two non-screened areas that sandwich the screened area, and then estimates, on the basis of the speeds of two tracked vehicles running, along a same lane, in the respective ones of the two non-screened areas, the inter-vehicle distances for a tracked vehicle running, along the same lane, in the screened area.

Description

technical field [0001] The present invention relates to an inter-vehicle distance estimation method and an inter-vehicle distance estimation device for estimating the inter-vehicle distance. Background technique [0002] Patent Document 1 discloses an object tracking device. When a tracking object is blocked by multiple obstacles, the estimated obstacle with a longer occlusion time is calculated based on the difference between the motion vector of the obstacle and the motion vector of the tracking object. Set as tracking object. [0003] Patent Document 1: (Japanese) Unexamined Patent Publication No. 2012-80221 [0004] However, in the technology described in Patent Document 1, the speed at the time when the tracking target is blocked is used as the speed of the tracking target. When the speed changes, the accuracy of inter-vehicle distance estimation deteriorates. Contents of the invention [0005] The present invention is made in view of the above-mentioned problems, ...

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Problems solved by technology

[0004] However, in the technology described in Patent Document 1, the speed at the time when the tracking target is blocked is use

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