書誌事項
- タイトル別名
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- Recovery of Three-Dimensional Structure of Moving Object from Orthographically Projected Optical Flow
- ウンドウ ブッタイ ノ セイシャ エイゾウ カラ ノ 3ジゲン コウゾウ フク
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A method is proposed to recover three-dimensional structure and motion of a moving rigid object. It is assumed that one can observe velocity fields generated at temporally discrete intervals by orthographic projection of a set of points belonging to one object whose rotational velocity component is constant.<br>From the condition of rigidity, an instantaneous rigidity condition is derived which states that the relative position vector between any two points is orthogonal to the corresponding relative velocity vector.<br>From the condition of constant rotational velocity component, each of the projected relative velocity vectors depicts a similar elliptical trajectory, the direction of whose longer axis is one and the same.<br>Then one can determine the equations of the ellipses by observing only two points in three views or three points in two views. The solution is obtained from a set of linear equations. The determined length of the longer axis enables one to determine the relative velocity and then the instantaneous rigidity condition is used to obtain the relative position. The special cases where the rotational axis is either perpendicular to or parallel with the image plane are discussed.<br>The above results are discussed in relation to the relevant psychophysical observations as well as the other theoretical studies.
収録刊行物
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- 計測自動制御学会論文集
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計測自動制御学会論文集 20 (9), 837-843, 1984
公益社団法人 計測自動制御学会
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詳細情報 詳細情報について
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- CRID
- 1390001204505048448
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- NII論文ID
- 130003789871
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- NII書誌ID
- AN00072392
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- ISSN
- 18838189
- 04534654
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- NDL書誌ID
- 2999562
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可