To provide a facial direction estimation device capable of obtaining a facial direction estimation device at low cost.SOLUTION: A facial direction estimation device includes: an envelope curve acquirement unit for acquiring an envelop curve expressing time change in signal level of received waves obtained when transmission waves transmitted from a plurality of transmission units arranged in positions differing from each other are returned by reflecting on a face of a passenger seated in a seat of a vehicle; a storage processing unit for storing in advance a first reference envelop curve obtained when the passenger faces the front direction while still in a seated position, a second reference envelop curve obtained when faced to a first direction differing from the front direction, and a third reference envelop curve obtained when faced in a second direction which is an opposite direction from the first direction with the front direction in between; and an estimation unit for estimating present orientation of the face based on comparison between present enveloping curve acquired for the present state of the face and at least one reference envelop curve among the first reference envelop curve, the second reference envelop curve, and the third reference envelop curve.SELECTED DRAWING: Figure 5
【課題】乗員の顔向きの推定を低コストで実現できる、顔向き推定装置を提供する。【解決手段】顔向き推定装置は、互いに異なる位置に配置された複数の送信部から送信された送信波が車両の座席に着座した乗員の顔で反射して戻ってきたときに得られる受信波の信号レベルの時間変化を表す包絡線を取得する包絡線取得部と、乗員が着座姿勢のまま、顔を正面方向に向けた場合に得られる第1基準包絡線と、顔を正面方向とは異なる第1方向に向けた場合に得られる第2基準包絡線と、顔を、正面方向を挟んで第1方向とは逆方向の第2方向に向けた場合に得られる第3基準包絡線と、を予め記憶させる記憶処理部と、顔の現在の状態に対して取得される現在包絡線と、第1基準包絡線、第2基準包絡線、第3基準包絡線のうち少なくとも一つの基準包絡線との比較に基づき、顔の現在の向きを推定する推定部と、を備える。【選択図】図5
FACIAL DIRECTION ESTIMATION DEVICE
顔向き推定装置
2021-02-15
Patent
Electronic Resource
Japanese
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