JP2009529201A - 都合のよい符合化システム - Google Patents
都合のよい符合化システム Download PDFInfo
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- G06V40/18—Eye characteristics, e.g. of the iris
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- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/18—Eye characteristics, e.g. of the iris
- G06V40/193—Preprocessing; Feature extraction
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Abstract
Description
本出願は、2005年1月26日に出願された米国仮出願第60/647,270号の利益を主張する2006年1月25日に出願された米国特許出願第11/275,703号の一部継続出願である。
本出願は、2006年3月10日に出願された米国特許出願第11/372,854号の一部継続出願である。
本出願は、2007年2月15日に出願された米国特許出願第11/675,424号の一部継続出願である。
米国政府は、本発明における権利を有する場合がある。
関連出願は、2003年9月5日に出願された米国特許出願第10/655,124号の一部継続出願である2004年11月3日に出願された米国特許出願第10/979,129号、および、2006年5月9日に出願された米国特許出願第11/382,373号を含み、それらは、参照により本明細書に組み込まれる。
2006年1月25日に出願された米国特許出願第11/275,703号は参照により本明細書に組み込まれる。
2005年1月26日に出願された米国特許出願第11/043,366号は参照により本明細書に組み込まれる。
2007年2月7日に出願された米国特許出願第11/672,108号は参照により本明細書に組み込まれる。
2007年3月2日に出願された米国特許出願第11/681,614号は参照により本明細書に組み込まれる。
y(r)=Iθ(r)・f(r)
を生成してもよい。信号Iθ(r)は、半径値の関数としてそれぞれの角度において抽出された強度信号を意味してもよい。これらは、虹彩の2つの境界間の補間された画像強度値であり、所定の数の半径サンプルNrにサンプリングされてもよい。関数f(r)は、長さNrのフィルタ関数を表してもよい。
f(rk)=I(r)*u(r−ΔTk)
であってよい。式中、I(r)は強度ベクトルであり、*は畳み込み記号である。
式中、f(r)は畳み込みの結果であり、I(r)は演算子であり、*は畳み込みを示す。u(r)は、たとえば、図5に示すように、ステップ関数51を示してもよい。以下は、符号試験をもたらしてもよい。
図5は、ブロック52へのステップ関数入力を有する線図を示し、ブロック52はブロック53への出力を有し、ブロック53は、次に、ブロック54への出力を有する。ブロック52、53、および54は、それぞれ、u(t−ΔT1)、u(t−ΔT2)、およびu(t−ΔTk)を表す。「k」は、どれだけの数のu(t−ΔTk)ブロックが持たれてよいかに応じて3つまたは何らかの他の数であってよい。「k」を使用するこの手法は、本図および本明細書で参照される他の図の他のコンポーネントおよび/またはシンボルに対する適用であってよい。ブロック52、53、および54からの出力は、それぞれ、convolution(畳み込み)演算子99、56、および57に進んでもよい。同様に、演算子のそれぞれへの入力は、Iris Map(虹彩マップ)55からの出力であってよい。演算子99、56、および57からの出力は、それぞれ、ブロック58、59、および71(それぞれ、(|f(r)|−υ)を表す)に進んでもよい。演算子99、56、および57からの出力は、質問「sign(符号)(f(r))<0?」をする、それぞれ、菱形シンボル76、77、および77に進んでもよい。ブロック58、59、および71からの出力は、質問「≦0?」をする、それぞれ、菱形シンボル72、73、および74に進んでもよい。Map Mask79は、質問「maskθ(r)>0?」をする菱形シンボル75に対する出力を有してもよい。菱形シンボル72、73、または74からの「yes」回答は、それぞれ、Code Mask(コードマスク)41、42、または44に対して1として進んでもよい。菱形シンボル72、73、または74の1つからの「no」回答は、菱形シンボル75に進んでもよい。シンボル75からの回答がyesである場合、1が、それぞれ、Code Mask41、42、または44に進んでもよい。シンボル75からの回答がnoである場合、0が、それぞれ、Code Mask41、42、または44に進んでもよい。菱形シンボル76、77、または78に関して、回答がyesである場合、0が、それぞれ、Barcode(バーコード)46、47、または49に進んでもよい。シンボル76、77、または78からの回答がnoである場合、1が、それぞれ、Barcode46、47、または49に進んでもよい。
∀ΔT、要求に応じて新しいビンセットが得られてもよい。照合を行うために、方式アルゴリズムを1回だけ実行することがおそらく適切である。
∀波長、ピーク減衰に基づいて新しいコードセットが得られてもよい。
図6は、ブロック52への方形波形(ある程度一定周期を有する)入力51を有する線図を示し、ブロック52はブロック53への出力を有し、ブロック53は、次に、ブロック54への出力を有する。u(t)は、半径方向軸と同じ長さを有してもよい。ブロック52、53、および54は、それぞれ、u(t−ΔT1)、u(t−ΔT2)、およびu(t−ΔTk)を表す。「k」は、どれだけの数のu(t−ΔTk)ブロックが持たれてよいかに応じて3つまたは何らかの他の数であってよい。「k」を使用するこの手法は、本図および本明細書で参照される他の図の他のコンポーネントおよび/またはシンボルに対する適用であってよい。ブロック52、53、および54からの出力は、それぞれ、dot product演算子82、83、および84に進んでもよい。同様に、演算子のそれぞれへの入力は、Iris Map55からの出力であってよい。演算子82、83、および84からの出力は、それぞれ、ブロック58、59、および71(それぞれ、(|f(r)|−υ)を表す)に進んでもよい。演算子82、83、および84からの出力は、質問「sign(f(r))<0?」をする、それぞれ、菱形シンボル76、77、および77に進んでもよい。ブロック58、59、および71からの出力は、質問「≦0?」をする、それぞれ、菱形シンボル72、73、および74に進んでもよい。Map Mask79は、質問「maskθ(r)>0?」をする菱形シンボル75に対する出力を有してもよい。菱形シンボル72、73、または74からの「yes」回答は、それぞれ、Code Mask41、42、または44に対して1として進んでもよい。菱形シンボル72、73、または74の1つからの「no」回答は、菱形シンボル75に進んでもよい。シンボル75からの回答がyesである場合、1が、それぞれ、Code Mask41、42、または44に進んでもよい。シンボル75からの回答がnoである場合、0が、それぞれ、Code Mask41、42、または44に進んでもよい。菱形シンボル76、77、または78に関して、回答がyesである場合、0が、それぞれ、Barcode46、47、または49に進んでもよい。シンボル76、77、または78からの回答がnoである場合、1が、それぞれ、Barcode46、47、または49に進んでもよい。
∀f(r)=I(r)−ΣI(r)(2つの谷内で)
である。ある意味で、
図8bは、本明細書で述べる別のアルゴリズムの図である。Iris Map96は、山が特定され97、谷が特定される98。これらの特定された山と谷および他のマップ96情報は、それぞれ、適用される式101および102を有してもよい。式101および102からの結果は、質問「sign(f(r))<0?」をする、菱形シンボル103および104に進んでもよい。Iris Map96に対応するMap Mask105は、質問「maskθ(r)>0?」をする菱形シンボル106に対する出力を有してもよい。菱形シンボル106の質問に対する回答がyesである場合、1が、Code Mask108に進んでもよく、回答がnoである場合、0が、Code Mask108に進んでもよい。菱形シンボル103の質問に対する回答がyesである場合、0が、Barcode107とシンボル106に進んでもよく、回答がnoである場合、1が、Code Mask108に進んでもよい。シンボル104の質問に対する回答がyesである場合、1が、Barcode107とシンボル106に進んでもよく、回答がnoである場合、0が、Code Mask108に進んでもよい。
f(r)=I(r)*u(r−ΔTk)
である。
本発明は、少なくとも1つの例示的な例に関して述べられたが、本明細書を読むことによって、多くの変形および変更が当業者に明らかになるであろう。したがって、添付特許請求の範囲は、全てのこうした変形および変更を含むために、従来技術を考慮して、できる限り広い範囲で解釈されるという意図がある。
Claims (20)
- 虹彩パターンの意味のある特徴を抽出するステップと、
前記特徴を符合化するステップと、
前記符合化された虹彩パターンを、少ないが、照合を行うには十分なビットに圧縮するステップとを含む、
符号化方法。 - 前記抽出するステップおよび前記符合化するステップをセグメンテーションに組み込むステップをさらに含む、請求項1に記載の方法。
- 前記虹彩パターンの前記意味のある特徴を検出するためにフィルタリングするステップをさらに含む、請求項1に記載の方法。
- 前記符合化するステップは、複数ステージにおいて実施される、請求項1に記載の方法。
- 前記符合化するステップは、単一のビットを用いて複数ステージにおいて実施される、請求項1に記載の方法。
- 前記ビットは、正値、負値、または未知の値によって量子化された符号である、請求項5に記載の方法。
- 付加的なビットが付加されて、前記虹彩パターンの前記特徴の照合を改善する、請求項5に記載の方法。
- いくつかの角度のそれぞれにおける虹彩画像から特徴ベクトルを抽出するステップと、
周期フィルタを用いてそれぞれの特徴ベクトルのドット積をとるステップとを含む符号化するための方法。 - 前記フィルタは対称波形を用いて構築される、請求項8に記載の方法。
- 前記対称波形は、その周期にわたる和が0になる、請求項9に記載の方法。
- それぞれの特徴ベクトルは、1、0、または未知数によって量子化された符号でよい、請求項8に記載の方法。
- いくつかの角度のそれぞれにおける前記虹彩画像からの前記特徴ベクトルは、照合に使用されるより少数のビットに符合化される、請求項8に記載の方法。
- いくつかの角度のそれぞれにおける前記虹彩画像からの前記特徴ベクトルは、複数のステージにおいて、漸進的照合に使用されるより少数のビットに符合化される、請求項8に記載の方法。
- 前記抽出するステップおよび符合化するステップは、前記虹彩画像のセグメンテーションに一体化される、請求項13に記載の方法。
- いくつかの1次元半径方向セグメントのそれぞれにおいて、虹彩パターンから特徴ベクトルを抽出するステップと、
前記特徴ベクトルをフィルタリングするステップとを含む、
符合化するための方法。 - 前記1次元半径方向セグメントの軸において、前記フィルタリングのドット積をとるステップをさらに含む、請求項15に記載の方法。
- 0、1、および未知数のビット表現を使用して、前記1次元半径方向セグメントの軸において、前記フィルタリングのドット積をとるステップをさらに含む、請求項15に記載の方法。
- 前記特徴ベクトルの強度は、0、1、および未知数のビット表現を使用して、山と谷の発生に基づいて符合化される、請求項15に記載の方法。
- 0、1、および未知数のビット表現を使用して、前記1次元半径方向セグメントの軸において、不均一波形のドット積をとるステップをさらに含む、請求項15に記載の方法。
- 0、1、および未知数のビット表現を使用して、前記1次元半径方向セグメントの軸において、対称波形の畳み込みをとるステップをさらに含む、請求項15に記載の方法。
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
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US77877006P | 2006-03-03 | 2006-03-03 | |
US11/372,854 US8442276B2 (en) | 2006-03-03 | 2006-03-10 | Invariant radial iris segmentation |
US11/672,108 US8090157B2 (en) | 2005-01-26 | 2007-02-07 | Approaches and apparatus for eye detection in a digital image |
US11/675,424 US8098901B2 (en) | 2005-01-26 | 2007-02-15 | Standoff iris recognition system |
US11/681,662 US8045764B2 (en) | 2005-01-26 | 2007-03-02 | Expedient encoding system |
US11/681,614 US8050463B2 (en) | 2005-01-26 | 2007-03-02 | Iris recognition system having image quality metrics |
PCT/US2007/063224 WO2008019169A2 (en) | 2006-03-03 | 2007-03-02 | Iris encoding system |
Publications (2)
Publication Number | Publication Date |
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JP2009529201A true JP2009529201A (ja) | 2009-08-13 |
JP2009529201A5 JP2009529201A5 (ja) | 2010-04-15 |
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JP2008558483A Pending JP2009529201A (ja) | 2006-03-03 | 2007-03-02 | 都合のよい符合化システム |
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US (2) | US8045764B2 (ja) |
JP (1) | JP2009529201A (ja) |
KR (1) | KR101299074B1 (ja) |
GB (1) | GB2450023B (ja) |
WO (1) | WO2008019169A2 (ja) |
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US8488846B2 (en) | 2013-07-16 |
WO2008019169A2 (en) | 2008-02-14 |
KR20080102280A (ko) | 2008-11-24 |
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US8045764B2 (en) | 2011-10-25 |
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