JP4841549B2 - 連続するビュー間で発生する物体検出器(object−detector)の相対的な運動(motion)を補正(correction)する方法 - Google Patents
連続するビュー間で発生する物体検出器(object−detector)の相対的な運動(motion)を補正(correction)する方法 Download PDFInfo
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Description
1.各イメージは、幅640ピクセル、高さ480ピクセルで構成される。
2.各ピクセルには、8シングル・ビット(グレー・レベル0〜255)の輝度値が含まれる。
3.微小毛細血管を使用するOPTMに関連して、管の軸は短軸(480ピクセル)に平行である。
4.微小毛細血管を使用するOPTMに関連して、管壁分離(tube wall separation)は530ピクセルである。
5.水平方向のオフセットを求めるときに使用するビンの数(B1)は20である。
6.軸方向のオフセットを求めるときに使用するビンの数(B2)は2である。
7.配列は、1024×1024個のピクセルにゼロが埋め込まれている。
1.上の管壁の位置DLAT
2.現在のイメージと参照イメージとの相互相関の最大値CMAX
3.現在のイメージと前のイメージとの相互相関の該当する行のFMAXの位置GMAX(最初のイメージではGMAX=0)
4.FMAX(最初のイメージではFMAX=0)
ソース・コード
以下は、本発明の運動補正の方法による1つの実施形態を実装するソース・コード・テキストの例である。実行可能ファイル(regcorr.exe)は、2つのヘッダー・ファイル(rrahn.hとregcorr.h)および4つのC++ファイル(fileinfo.cpp、nr−fft.cpp、multiplycomplexvalues.cpp、regcorr2.cpp)がプロジェクト(regcorr.ide)によってリンクされて構成される。プロジェクトはBorland C++ 5.01によってコンパイルされ、「Win32 Console」モードに設定され、staticクラス・ライブラリ・フレームワークを使用する。実行可能ファイルのサイズはおよそ60kBである(プログラム「regcorr.exe」と「regcorr_no_lateral.exe」との相違は、水平方向のオフセットを計算してそれをテキスト・ファイルに書き込むというオプションがあるかどうかのみである。また、いずれのプログラムも計算を省略し、代わりにオフセットをテキスト・ファイルから読み込むことができる)。
本発明について、特許法に準拠するため、および本発明の新しい原理を適用し、必要に応じて例示的で特殊なコンポーネントを構築して使用するのに必要な情報を当業者に提供するために、本明細書で詳細に説明してきた。ただし、本発明は個々に様々な設備、装置、および再構成アルゴリズムで実行できること、および設備の細部および操作手順のいずれに関しても、本発明の真の精神と範囲を逸脱することなく様々な変更を実装できることは言うまでもない。
Claims (9)
- 連続するビュー間で物体検出器の相対的な運動を補正する方法であって、
対象となる物体を照光し、それぞれ異なった視野から取得されるような現在のビューおよび直前のビューからなる連続ビューを利用してイメージを作成する工程と、
前記イメージの水平方向のオフセット補正値を決定する工程であって、水平方向のオフセットが前記イメージをしきい値化する工程および前記イメージとテンプレート・イメージとを相互相関する工程による毛細血管の管の軸と垂直な方向への平行移動(translation)である工程と、
前記イメージの軸方向のオフセット補正値を決定する工程であって、軸方向のオフセットが、前記イメージのしきい値化されたバージョンを作成するための前記イメージの前記現在のビューのコピーをしきい値化する工程と、前記イメージの前記しきい値化されたバージョンと直前のイメージのしきい値化されたバージョンとを相互相関する工程と、前記2つのイメージの水平方向の補正の差に対応する行に沿った相互相関関数の最大値として軸方向のオフセットを決定する工程と、による前記毛細血管の管の軸と平行な方向への平行移動(translation)である工程と、
前記水平方向のオフセット補正値と前記軸方向のオフセット補正値とを前記イメージに適用し、補正されたファイル・イメージを作成する工程とを備える方法。 - 前記イメージの水平方向のオフセット補正値を決定する工程は、
前記イメージをしきい値化する工程と、
前記イメージをテンプレート・イメージと相互相関する工程とをさらに備える請求項1に記載の方法。 - 前記テンプレート・イメージは、
あらかじめ指定された位置に少なくとも2本の白線を作成し、暫定的なテンプレート・イメージを作成する工程と、
前記暫定的なテンプレート・イメージを拡張して2次元にゼロを埋め込み、拡張されたテンプレート・イメージを作成する工程と、
前記拡張されたテンプレート・イメージに対して2次元のFFTを実行して最終的なテンプレート・イメージを作成する工程とを備える方法で作成される請求項2に記載の方法。 - 前記イメージをしきい値化する工程は、
複数のビンを含む前記イメージのグレースケール・ヒストグラムを検出する工程と、
ピクセル数が最大のビンを特定する工程と、
前記イメージ内で前記特定されたビンのグレースケール値以上のすべてのピクセルを前記イメージのコピー内でゼロに設定する工程と、
前記イメージの前記コピーに2次元のFFTを適用してフーリエ変換を作成する工程と、
前記フーリエ変換に前記テンプレート・イメージのフーリエ変換の複素共役をかけて新しいイメージ配列を作成する工程と、
複数の行のそれぞれについて前記新しいイメージ配列を合計し、水平方向の合計配列を計算する工程と、
前記水平方向の合計配列の1次元フーリエ変換を計算し、前記元のイメージの前記コピーと前記テンプレート・イメージについて行の相互相関を検出する工程と、
イメージのフィーチャの補正されない位置を前記水平方向の合計配列の最大値の位置として設定する工程と、
前記水平方向のオフセットを前記イメージのフィーチャの前記補正されない位置とあらかじめ指定されたイメージのフィーチャの端の位置との差として決定する工程とをさらに備える請求項3に記載の方法。 - 軸方向のオフセットを決定する工程は、
複数のビンを含む前記イメージの前記現在のビューの前記グレースケール・ヒストグラムを検出する工程と、
ピクセル数が最大のビンを特定する工程と、
前記イメージの前記現在のビュー内の前記最大のビンのグレースケール値以上のすべてのピクセルを前記イメージの前記現在のビューのコピー内でゼロに設定することによってしきい値化されたイメージを作成する工程と、
前記しきい値化されたイメージに低域通過フィルタを適用する工程と、
前記しきい値化され、低域通過フィルタを適用されたイメージと前のイメージのしきい値化され、低域通過フィルタを適用されたものとの相互相関を計算する工程と、
前記2つのイメージの前記水平方向のオフセットの差に対応する前記得られた相互相関の前記行における最大の補正値を検出する工程と、
前記補正値を前記前の軸方向のオフセットのすべての合計に加える工程とをさらに備える請求項1に記載の方法。 - 前記水平方向のオフセットの値を電気的な記憶装置に書き込む工程と、
前記軸方向のオフセットの値を電気的な記憶装置に書き込む工程と、
前記水平方向および軸方向のオフセットから決定されるような1つまたは2つの辺から複数のピクセルを切り取り、残りのピクセルを前記切り取った複数のピクセルの数だけシフトすることによって補正されたイメージを生成する工程とをさらに備える請求項1に記載の方法。 - 前記対象となる物体は細胞または細胞核である請求項1に記載の方法。
- 前記相互相関の前記最大値の大きさがあらかじめ指定された値より小さい場合に、前記ヒストグラムのビンの数を別の値にして前記工程を繰り返す工程をさらに備える請求項4に記載の方法。
- 前記イメージフィーチャは試料コンテナのフィーチャを備える請求項4に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/876,328 US7260253B2 (en) | 2002-04-19 | 2004-06-24 | Method for correction of relative object-detector motion between successive views |
US10/876,328 | 2004-06-24 | ||
PCT/US2005/019847 WO2006011945A2 (en) | 2004-06-24 | 2005-06-06 | Method for correction of relative object-detector motion between successive views |
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JP2008504060A JP2008504060A (ja) | 2008-02-14 |
JP2008504060A5 JP2008504060A5 (ja) | 2008-07-24 |
JP4841549B2 true JP4841549B2 (ja) | 2011-12-21 |
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JP2007518092A Expired - Fee Related JP4841549B2 (ja) | 2004-06-24 | 2005-06-06 | 連続するビュー間で発生する物体検出器(object−detector)の相対的な運動(motion)を補正(correction)する方法 |
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US (2) | US7260253B2 (ja) |
EP (1) | EP1769423B1 (ja) |
JP (1) | JP4841549B2 (ja) |
CN (1) | CN101027677B (ja) |
AU (1) | AU2005267569B2 (ja) |
CA (1) | CA2570730C (ja) |
ES (1) | ES2559411T3 (ja) |
HK (1) | HK1104633A1 (ja) |
WO (1) | WO2006011945A2 (ja) |
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US20070071357A1 (en) | 2007-03-29 |
EP1769423A2 (en) | 2007-04-04 |
WO2006011945A3 (en) | 2007-02-08 |
AU2005267569B2 (en) | 2011-03-31 |
CN101027677A (zh) | 2007-08-29 |
CN101027677B (zh) | 2011-07-27 |
WO2006011945A2 (en) | 2006-02-02 |
JP2008504060A (ja) | 2008-02-14 |
CA2570730A1 (en) | 2006-02-02 |
CA2570730C (en) | 2013-11-12 |
EP1769423B1 (en) | 2015-11-18 |
WO2006011945B1 (en) | 2007-04-12 |
EP1769423A4 (en) | 2012-11-07 |
US7260253B2 (en) | 2007-08-21 |
HK1104633A1 (en) | 2008-01-18 |
ES2559411T3 (es) | 2016-02-12 |
US7542597B2 (en) | 2009-06-02 |
AU2005267569A1 (en) | 2006-02-02 |
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