To perform automatic exposure control of an in-vehicle camera under dark driving environment such as night.SOLUTION: A vehicle-mounted camera system defines a far small frame where a far vehicle is expected to be traveling with reference to a far road vanishing point in the traveling direction of the own vehicle, controls the exposure of the vehicle-mounted camera on the basis of luminance information in the far small frame, and can avoid the over-exposure and photograph the far vehicle in which a headlight is turned on in a dark driving environment. Also, the system can efficiently reproduce a target light source with priority with a small amount of memory by generating a brightness horizontal profile only within the far small frame.SELECTED DRAWING: Figure 14
【課題】夜間など暗い走行環境下で車載カメラの自動露光制御を行なう。【解決手段】車載カメラ・システムは、自車両の走行進行方向の遠方道路消失点を基準にして、遠方車両が走行していると期待される遠方小枠を定義し、遠方小枠内の輝度情報に基づいて車載カメラを露光制御して、暗い走行環境下でヘッドライトを点灯する遠方車両を、オーバー露光を回避して撮影することができる。また、同システムは、遠方小枠内に限定して輝度水平プロファイルを生成することにより、少ないメモリーで効率的に、対象とする光源を優先して再現することができる。【選択図】 図14
VEHICLE-MOUNTED CAMERA SYSTEM, IMAGE PROCESSING APPARATUS, AND IMAGE PROCESSING METHOD
車載カメラ・システム、並びに画像処理装置及び画像処理方法
2020-05-28
Patent
Electronic Resource
Japanese
IPC: | H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G03B APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM , Geräte oder Anordnungen zum Aufnehmen, Projizieren oder Betrachten von Fotografien / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS |
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