PROBLEM TO BE SOLVED: To provide an eyeball information estimation device capable of inhibiting reduction in estimation accuracy of an eyeball center position.SOLUTION: An eyeball information estimation device comprises: an acquisition unit for acquiring an image that may include an image of a subject's pupil and a Purkinje image of a light source on a cornea surface of the subject's eye； a detection unit for detecting the pupil's center position and the Purkinje image's position； a selection unit for performing selection on which of first visual line angle calculation processing and second visual line angle calculation processing is to be executed； and a processing unit that when the first visual line angle calculation processing is selected and when at least pupil reliability indicating a probability of being a pupil is higher than a predetermined first pupil threshold and a Purkinje reliability indicating a probability of being a Purkinje image is higher than a predetermined first Purkinje threshold, estimates an eyeball center position of the subject's eye on the basis of a three-dimensional face model determined on the basis of a visual line angle and executed update of the eyeball center position in a storage unit.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2020,JPO&INPIT【課題】眼球中心位置の推定精度の低下を抑制できる眼球情報推定装置を提供する。【解決手段】眼球情報推定装置は、対象者の眼の瞳孔と、対象者の眼の角膜表面における光源のプルキニエ像と、を含みうる画像を取得する取得部と、瞳孔の中心位置とプルキニエ像の位置を検出する検出部と、第１の視線角度算出処理と、第２の視線角度算出処理とのいずれを実行するかを選択する選択部と、第１の視線角度算出処理が選択された場合に、少なくとも瞳孔である確からしさを示す瞳孔信頼度が所定の第１の瞳孔閾値より高く、かつプルキニエ像である確からしさを示すプルキニエ信頼度が所定の第１のプルキニエ閾値より高い場合に、視線角度に基づいて決定される３次元顔モデルに基づき、対象者の眼の眼球中心位置の推定を行い、記憶部の眼球中心位置の更新を実行する処理部と、を備える。【選択図】図５
