JP2015108621A5 - 3次元点群から平面を抽出する、方法、画像処理装置およびプログラムを記憶した非一次的なコンピュータ可読媒体 - Google Patents

3次元点群から平面を抽出する、方法、画像処理装置およびプログラムを記憶した非一次的なコンピュータ可読媒体 Download PDF

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JP2015108621A5
JP2015108621A5 JP2014228683A JP2014228683A JP2015108621A5 JP 2015108621 A5 JP2015108621 A5 JP 2015108621A5 JP 2014228683 A JP2014228683 A JP 2014228683A JP 2014228683 A JP2014228683 A JP 2014228683A JP 2015108621 A5 JP2015108621 A5 JP 2015108621A5
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  1. 3次元(3D)点から平面を抽出する方法であって、
    3次元(3D)センサーにより奥行きマップを取得するステップであって、前記奥行きマップはピクセルの二次元グリッドを有し、各ピクセルは奥行き値を有するものと、
    前記奥行きマップを逆投影して3次元(3D)点群を生成するステップと、
    前記3D点を互いに素な領域に分割するステップと、
    ノード及びエッジのグラフを構築するステップであって、前記ノードは前記領域を表し、前記エッジは前記領域の近傍関係を表し、各ノードは1組の3D点、前記1組の3D点に当てはめられた面および前記面に対する前記1組の3D点の平均二乗誤差(MSE)を含むものと、
    凝集型階層的クラスタリングを前記グラフに適用するステップであって、同じ平面に属する領域をマージし、前記凝集型階層的クラスタリングの各反復において、最小MSEを有するノードが選択されて近傍ノードの中から最小マージMSEを有する近傍ノードの1つとマージされるものと、
    を含み、
    前記ステップはプロセッサにおいて実行される、3次元点から平面を抽出する方法。
  2. 前記3D点は3Dセンサーによって取得される、請求項1に記載の方法。
  3. 前記平面の境界を精緻化するために領域成長を適用するステップを更に含む、請求項1に記載の方法。
  4. 前記平面は画像シーケンスからリアルタイムで抽出される、請求項1に記載の方法。
  5. 前記分割は一様であり、前記領域はサイズが等しい、請求項1に記載の方法。
  6. 前記3D点は組織化され、2Dインデックスを有する、請求項1に記載の方法。
  7. 前記2Dインデックスは、前記分割するステップ及び前記構築するステップのために用いられる、請求項6に記載の方法。
  8. 前記各領域内の全ての点の一次統計及び二次統計を維持するステップを更に含む、請求項1に記載の方法。
  9. 前記3D点は組織化されない、請求項1に記載の方法。
  10. 3D空間において1組のボクセルを定義するステップと、
    前記各3D点を該3D点の座標に従ってボクセルに割り当てるステップと、
    少なくとも1つの3D点を有するボクセルを前記ノードであると決定するステップと、
    2つのボクセルが前記3D空間において互いに隣り合っている場合に、該ボクセル間の前記エッジを定義するステップと、
    を更に含む、請求項9に記載の方法。
  11. 前記分割は一様でない、請求項1に記載の方法。
  12. 異なる座標系において定義された前記3D点の組を、前記3D点の前記各組から抽出された前記平面を用いることによって位置合わせするステップを更に含む、請求項1に記載の方法。
  13. 前記位置合わせするステップは前記3D点及び前記平面を用いる、請求項12に記載の方法。
  14. 前記平面は、3Dロケーションの座標を求めるのに用いられる、請求項1に記載の方法。
  15. 前記3Dロケーションは手作業で指定される、請求項14に記載の方法。
  16. 前記3Dロケーションは自動的に求められる、請求項14に記載の方法。
  17. 3次元(3D)点から平面を抽出する画像処理装置であって、前記画像処理装置は、
    奥行きマップを取得するように構成された3次元(3D)センサーであって、前記奥行きマップはピクセルの二次元グリッドを有し、各ピクセルは奥行き値を有するものと、
    前記3Dセンサーに動作的に接続され前記奥行きマップを受けるプロセッサと、
    を備え、前記プロセッサは、
    前記奥行きマップを逆投影して3次元(3D)点群を生成し、
    前記3D点群を互いに素な領域に分割し、
    ノード及びエッジのグラフを構築し、前記ノードは前記領域を表し、前記エッジは前記領域の近傍関係を表し、各ノードは1組の3D点、前記1組の3D点に当てはめられた面および前記面に対する前記1組の3D点の平均二乗誤差(MSE)を含み、
    凝集型階層的クラスタリングを前記グラフに適用し、同じ平面に属する領域をマージし、前記凝集型階層的クラスタリングの各反復において、最小MSEを有するノードが選択されて近傍ノードの中から最小マージMSEを有する近傍ノードの1つとマージされる、
    ように構成さている、
    3次元(3D)点から平面を抽出する画像処理装置。
  18. 3次元(3D)点から平面を抽出するために画像処理をプロセッサに実行させるプログラムを記憶した非一次的なコンピュータ可読媒体であって、前記画像処理は、
    3次元(3D)センサーにより奥行きマップを取得するステップであって、前記奥行きマップはピクセルの二次元グリッドを有し、各ピクセルは奥行き値を有するものと、
    前記奥行きマップを逆投影して3次元(3D)点群を生成するステップと、
    前記3D点を互いに素な領域に分割するステップと、
    ノード及びエッジのグラフを構築するステップであって、前記ノードは前記領域を表し、前記エッジは前記領域の近傍関係を表し、各ノードは1組の3D点、前記1組の3D点に当てはめられた面および前記面に対する前記1組の3D点の平均二乗誤差(MSE)を含むものと、
    凝集型階層的クラスタリングを前記グラフに適用するステップであって、同じ平面に属する領域をマージし、前記凝集型階層的クラスタリングの各反復において、最小MSEを有するノードが選択されて近傍ノードの中から最小マージMSEを有する近傍ノードの1つとマージされるものと、
    を含み、
    前記ステップは前記プロセッサにおいて実行される、プログラムを記憶した非一次的なコンピュータ可読媒体。
JP2014228683A 2013-12-04 2014-11-11 3次元点群から平面を抽出する、方法、画像処理装置およびプログラムを記憶した非一次的なコンピュータ可読媒体 Active JP6261489B2 (ja)

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