To provide a driver posture detection device for appropriately guessing a driver head state even when a driver head state cannot be detected.SOLUTION: A driver posture detection device includes: a driver head state calculation section 11 for calculating a measurement value of a driver head state based on an image from an in-vehicle camera 1; a driver head state estimation section 12 for estimating a driver head state when a measurement value of a driver head state cannot be calculated; and an abnormality determination section 13 for determining occurrence of an abnormality in a driver based on a calculation value or estimation value of a driver head state. The driver head state estimation section 12 assumes that a driver head state returns to an assumed head state value, which is equal to a calculation value immediately before a driver head state becomes a calculation impossible state after a return prediction time T elapses from a time when a driver head state has become a calculation impossible state, and then obtains a guess point E1 of a driver head state by interpolation using three points, i.e., two calculation points C3, C4 immediately before calculation becomes impossible and a return prediction point R1. Then, an estimation value of a driver head state is calculated.SELECTED DRAWING: Figure 2
【課題】 ドライバ頭部状態検出の欠測時にもドライバ頭部状態を適切に推測し得るドライバ姿勢検出装置を提供する。【解決手段】 ドライバ姿勢検出装置において、車内カメラ1からの画像に基づいてドライバ頭部状態の計測値を算出するドライバ頭部状態算出部11と、ドライバ頭部状態の計測値を算出不能なときにドライバ頭部状態を推定するドライバ頭部状態推定部12と、ドライバ頭部状態の算出値又は推定値に基づいてドライバ異常発生の判定を行う異常判定部13を備える。ドライバ頭部状態推定部12は、ドライバ頭部状態が算出不能になってから復帰予測時間T経過後に算出不能となる直前の算出値と等しい仮定頭部状態値に復帰すると仮定して、算出不能となる直前の2つの算出点C3、C4と復帰予測点R1の3点を用いた補間により、ドライバ頭部状態の推測点E1を求め、ドライバ頭部状態の推定値を算出する。【選択図】 図2
DRIVER POSTURE DETECTION DEVICE
ドライバ姿勢検出装置
2020-11-12
Patent
Electronic Resource
Japanese
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