CAMERA CALIBRATION DEVICE, METHOD AND PROGRAM

• Main Authors: SHINODA TOSHIHIKO, IWASHIMA TOMOYA, KAWAGUCHI YUJI, SHIGEYAMA MUSASHI
• Format: Patent
• Language: English; Japanese
• Published: 15.12.2016
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

PROBLEM TO BE SOLVED: To provide a camera calibration device that can be implemented without interrupting the work of a subject.SOLUTION: A camera calibration device 10 includes a registration unit 11 of the reference image 26 of a reference object 21, a detector 12 for detecting a change due to any one of the pan, tilt, zoom of cameras 22a, 22b, a data acquisition unit 13 for acquiring a two-dimensional image 25 (25a, 25b) showing both reference object 21 and a subject 23 (23x, 23y), an identification unit 14 for identifying the reference object appearing in the two-dimensional image based on the reference image, when a change in the setting state of the camera 22 is detected, a derivation unit 15 for deriving the positional information 27 in the two-dimensional image of an identified reference object, a calculation unit 16 for calculating camera parameters 28 based on the positional information, an update unit 18 for updating the camera parameters, and a generation unit 19 for generating the three-dimensional image of a subjected appearing in the two-dimensional image, based on the updated camera parameters.SELECTED DRAWING: Figure 1 【課題】被写体の作業を中断させずに実施できるカメラキャリブレーション【解決手段】カメラキャリブレーション装置１０は、参照物体２１の参照像２６の登録部１１と、カメラ２２ａ、２２ｂのパン・チルト・ズームのいずれかによる変化の検知部１２と、参照物体２１及び被写体２３（２３ｘ、２３ｙ）が共に写っている二次元画像２５（２５ａ、２５ｂ）を取得するデータ取得部１３と、カメラ２２の設定状態の変更を検知した場合、二次元画像に写っている参照物体を参照像に基づいて識別する識別部１４と、識別された参照物体の二次元画像における位置情報２７を導出する導出部１５と、位置情報に基づいてカメラパラメータ２８を算出する算出部１６と、カメラパラメータを更新する更新部１８と、更新後のカメラパラメータに基づいて、二次元画像に写っている被写体の三次元像を生成する生成部１９を備える。【選択図】図１