LOCATION DETECTION DEVICE

• Main Authors: ISHIGAMI HIROTAKE, KUWABARA MASAKI, TAKEMAE KASHU, SHIRAI TAKAMASA
• Format: Patent
• Language: English; Japanese
• Published: 09.11.2015
• Subjects: PHYSICS; SIGNALLING; TRAFFIC CONTROL SYSTEMS

PROBLEM TO BE SOLVED: To provide a location detection device that can attain both of enlargement of a treatable dynamic range of luminance and suppression of a time required for a location detection.SOLUTION: A location detection device comprises: imaging means that photographs an environment of a vehicle surrounding; parallax image acquisition means that acquires a parallax image on the basis of a photographing image photographed by the imaging means; synthesis means that synthesizes location information based on a plurality of parallax images to generate synthetic location information; and risk information acquisition means that acquires a collision risk of the vehicle with respect to surrounding objects. The synthesis means is configured to synthesize location information based on a plurality of parallax images acquired from a plurality of photographing images photographed with a mutually different exposure pattern, and, when the collision risk (for example, an own vehicle speed) acquired by the risk information acquisition means is higher, the synthesis means is configured to generate synthetic location information from the smaller number of parallax images than a case where the collision risk is low. 【課題】対応可能な輝度のダイナミックレンジを拡大することと、位置検出に要する時間の抑制とを両立することができる位置検出装置を提供する。【解決手段】車両周囲環境を撮像する撮像手段と、撮像手段によって取得された撮像画像に基づいて視差画像を取得する視差画像取得手段と、複数の視差画像に基づく位置情報を合成して合成位置情報を生成する合成手段と、周囲物に対する車両の衝突危険度を取得する危険度情報取得手段とを備え、合成手段は、互いに異なる露光パターンで撮像された複数の撮像画像から取得された複数の視差画像に基づく位置情報を合成し、合成手段は、危険度情報取得手段によって取得された衝突危険度（例えば、自車速）が大きい場合、衝突危険度が小さい場合よりも、少ない数の視差画像から合成位置情報を生成する。【選択図】図５