JP4434939B2 - 撮像装置及びその制御方法 - Google Patents
撮像装置及びその制御方法 Download PDFInfo
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- JP4434939B2 JP4434939B2 JP2004377240A JP2004377240A JP4434939B2 JP 4434939 B2 JP4434939 B2 JP 4434939B2 JP 2004377240 A JP2004377240 A JP 2004377240A JP 2004377240 A JP2004377240 A JP 2004377240A JP 4434939 B2 JP4434939 B2 JP 4434939B2
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/16—Gateway arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/04—Interfaces between hierarchically different network devices
- H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S370/00—Multiplex communications
- Y10S370/901—Wide area network
- Y10S370/902—Packet switching
- Y10S370/903—Osi compliant network
- Y10S370/906—Fiber data distribution interface, FDDI
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S370/00—Multiplex communications
- Y10S370/901—Wide area network
- Y10S370/902—Packet switching
- Y10S370/903—Osi compliant network
- Y10S370/907—Synchronous optical network, SONET
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S707/00—Data processing: database and file management or data structures
- Y10S707/99941—Database schema or data structure
- Y10S707/99943—Generating database or data structure, e.g. via user interface
Description
まず、本発明の第1の実施形態について説明する。
最初に、図4(a)に示す通常撮影モードの動作について説明する。まず、撮像素子102は、蓄積時間T1の間、被写体からの光を光電変換して電荷を蓄積する。この蓄積時間T1の間に、CPU120は角速度センサ105の出力から手ぶれ情報を取得し、手ぶれ情報の平均値を算出する。この算出した値に基づいて、図3を参照して上述したようにして、CPU120は撮像素子102からの読み出しタイミング及びラインメモリ104からの読み出しタイミングを制御して、画像を切り出して読み出すことにより手ぶれ補正を行う。このようにして切り出した1フレーム分の画像信号を画像メモリ110に記憶する。
次に、図4(b)に示す撮像素子蓄積スローシャッターモードの動作について説明する。撮像素子蓄積スローシャッターモードは、被写体が暗く、カメラの揺れが小さい場合に設定されるモードである。
最後に、図4(c)に示すメモリ蓄積スローシャッターモードの動作について説明する。メモリ蓄積スローシャッターモードは、被写体が暗く、撮像装置の揺れが大きい場合に設定されるモードである。
次に、本発明の第2の実施形態について説明する。
最初に、図5(a)に示す通常撮影モードの動作について説明する。まず、撮像素子102は、蓄積時間T1の間、被写体からの光を光電変換して電荷を蓄積する。この蓄積時間T1の間に、CPU120は角速度センサ105の出力から手ぶれ情報を取得し、手ぶれ情報の平均値を算出する。この算出した値に基づいて、図3を参照して上述したようにして、CPU120は撮像素子102からの読み出しタイミング及びラインメモリ104からの読み出しタイミングを制御して、画像を切り出して1ラインおきに読み出すことにより各フィールド画像の手ぶれ補正を行う。このようにして切り出した1フィールド分の画像信号(例えば、図5(a)の「1奇」)を画像メモリ110に記憶する。以降、直前の蓄積時間T1で蓄積した画像信号を読み出したラインと異なるラインの信号を読み出すことで、1フィールド分の画像信号(例えば、図5(a)の「2偶」、「3奇」、「4偶」等)を画像メモリ110に記憶する。ここで、「奇」は奇数フィールドを、「偶」は偶数フィールドを示している。
次に、図5(b)に示す撮像素子蓄積スローシャッターモードの動作について説明する。
最後に、図5(c)に示すメモリ蓄積スローシャッターモードの動作について説明する。
次に、本発明の第3の実施形態について説明する。
図6に示すメモリ蓄積スローシャッターモードでは、通常撮影モードと同じ蓄積時間T1の間、撮像素子102を露光する。この蓄積時間T1の間に、CPU120は角速度センサ105の出力から手ぶれ情報を取得し、手ぶれ情報の平均値を算出する。この算出した値に基づいて、図3を参照して上述したようにして、CPU120は撮像素子102からの読み出しタイミング及びラインメモリ104からの読み出しタイミングを制御して、画像を切り出して読み出すことにより手ぶれ補正を行う。このようにして切り出した1フレーム分の画像信号(例えば、図6の「1」)を、第1フレームメモリ110aに記憶する。
上記第3の実施形態では、画像メモリ110に2枚のフレーム画像を記憶する場合について説明したが、3枚以上のフレーム画像を記憶可能な容量を有する画像メモリ110を用いることにより、3枚以上のフレーム画像を加算することが可能になり、より暗い被写体を撮影する場合にも、通常撮影モードと同等の手ぶれ補正特性を保ったまま、より明るい画像を取得することができる。
図7は、プログレッシブ動画撮影を行った際のメモリ蓄積スローシャッターモードの別の動作を示す図で、通常撮影モードの4倍の露光時間分の画像信号を加算する場合の信号の流れ及びタイミングを表した図である。この場合、画像メモリ110は少なくとも4枚のフレーム画像の画像信号を格納するために十分な容量を備えているものとし、ここでは便宜上、第1フレームメモリ110a、第2フレームメモリ110b、第3フレームメモリ110c、第4フレームメモリ110dと呼ぶ。
次に、本発明の第4の実施形態について説明する。
最初に、図9(a)に示す通常撮影モードの動作について説明する。まず、撮像素子102は、蓄積時間T1の間、被写体からの光を光電変換して電荷を蓄積し、蓄積時間T1終了後、電荷信号を撮像素子102からCDS・A/D103を介して第1フレームメモリ110a及び第2フレームメモリ110bに交互に読み出す動作を繰り返し行う。画像ベクトル検出回路801は、新たに読み出した画像(例えば、第2フレームメモリ110bに記憶された「2」)と、1フレーム前に読み出した画像(例えば、第1フレームメモリ110aに記憶された「1」)とを比較して動きベクトルを検出し、検出した動きベクトルに基づいて、新たに読み出した画像(上述の例の場合、「2」)の手ぶれ情報を検出する。なお、図9の手ぶれ検出の各パルス横の( )の数字は、手ぶれ情報を検出する画像を示している。
次に、図9(b)に示す撮像素子蓄積スローシャッターモードの動作について説明する。
最後に、図9(c)に示すメモリ蓄積スローシャッターモードの動作について説明する。
次に、本発明の第5の実施形態について説明する。
最初に、図10(a)に示す通常撮影モードの動作について説明する。まず、撮像素子102は、蓄積時間T1の間、被写体からの光を光電変換して電荷を蓄積し、蓄積時間T1終了後、1ラインおきに蓄積した電荷信号を読み出すことにより1フィールド分の電荷信号を撮像素子102からCDS・A/D103を介して第1フィールドメモリ210a及び第2フィールドメモリ210bに交互に読み出す動作を繰り返し行う。以降、直前の蓄積時間T1で蓄積した画像信号を読み出したラインと異なるラインの信号を読み出すことで、1フィールド分の画像信号(例えば、図10(a)の「1奇」、「2偶」、「3奇」、「4偶」等)を第1フィールドメモリ210a及び第2フィールドメモリ210bに交互に記憶する。ここで、「奇」は奇数フィールドを、「偶」は偶数フィールドを示している。
次に、図10(b)に示す撮像素子蓄積スローシャッターモードの動作について説明する。
最後に、図10(c)に示すメモリ蓄積スローシャッターモードの動作について説明する。
なお、本発明は、複数の機器(例えばホストコンピュータ、インターフェイス機器、カメラヘッドなど)から構成されるシステムに適用しても、一つの機器からなる装置(例えば、デジタルビデオカメラ、デジタルスチルカメラ、カメラ付き形態端末など)に適用してもよい。
102 撮像素子
103 CDS・A/D回路
104 ラインメモリ
105 角速度センサ
110 画像メモリ
111 カメラ信号処理回路
112 画像処理回路
113 映像出力回路113
120 CPU
121 バスブリッジ
123 フラッシュメモリ
124 CPUメモリ
125 CPUバス
126 画像バス
801 画像ベクトル検出部
Claims (10)
- 撮像手段により画像を撮像する撮像装置であって、
前記撮像装置のぶれ量を検出するぶれ量検出手段と、
前記ぶれ量が予め設定された所定量よりも小さい場合に垂直同期期間よりも長い第1の露光時間により前記撮像手段の露光を行い、前記ぶれ量が前記所定量以上の場合に各垂直同期期間に第2の露光時間により前記撮像手段の露光を行うように制御する露光制御手段と、
前記撮像手段により撮像した複数の画像の相関に基づいて、前記複数の画像それぞれからその一部を選択することにより画像間のぶれを補正するぶれ補正手段とを有し、
前記ぶれ補正手段は、前記ぶれ量が所定量よりも小さい場合に、前記第1の露光時間によって撮像された複数の画像を画像間のぶれを補正し、補正して得られた最新の画像を各垂直同期期間に1回出力し、前記ぶれ量が前記所定量以上の場合に、前記第2の露光時間によって撮像された複数の画像を画像間のぶれ補正して複数枚ずつ加算して1枚の画像を生成し、生成された最新の画像を各垂直同期期間に1回出力することを特徴とする撮像装置。 - 前記ぶれ量検出手段は、角速度センサであることを特徴とする請求項1に記載の撮像装置。
- 前記ぶれ量検出手段は、前記複数の画像間における動きベクトルを検出することで前記ぶれ量を検出することを特徴とする請求項1に記載の撮像装置。
- 測光手段を更に有し、
前記測光手段による測光の結果、被写体輝度が予め設定した所定輝度よりも明るい場合に、前記露光制御手段は、前記ぶれ量検出手段により検出された前記ぶれ量に関わらず、各垂直同期期間に第3の露光時間により前記撮像手段の露光を行うように制御し、前記ぶれ補正手段は、前記第3の露光時間によって撮像された複数の画像を画像間のぶれを補正し、補正した各画像を各垂直同期期間に1回ずつ出力することを特徴とする請求項1乃至3のいずれか1項に記載の撮像装置。 - 前記撮像装置は、動画撮影装置であることを特徴とする請求項1乃至4のいずれか1項に記載の撮像装置。
- 前記撮像手段は、プログレッシブ読み出しを行うことを特徴とする請求項1乃至5のいずれか1項に記載の撮像装置。
- 前記撮像手段はインターレース読み出しを行い、前記測光手段による測光の結果、被写体輝度が予め設定した所定輝度よりも暗い場合に、いずれか一方のフィールドの画像信号に対して処理を行うことを特徴とする請求項4に記載の撮像装置。
- 撮像手段により画像を撮像する撮像装置の制御方法であって、
前記撮像装置のぶれ量を検出するぶれ量検出工程と、
前記ぶれ量が予め設定された所定量よりも小さい場合に、垂直同期期間よりも長い第1の露光時間により前記撮像手段の露光を行い、前記ぶれ量が前記所定量以上の場合に各垂直同期期間に第2の露光時間により前記撮像手段の露光を行うように制御する露光制御工程と、
前記露光制御工程における制御により前記撮像手段により撮像した複数の画像の相関に基づいて、前記複数の画像それぞれからその一部を選択することにより画像間のぶれを補正すると共に、前記ぶれ量が所定量よりも小さい場合に、前記第1の露光時間によって撮像された複数の画像を画像間のぶれを補正し、補正して得られた最新の画像を各垂直同期期間に1回出力し、前記ぶれ量が前記所定量以上の場合に、前記第2の露光時間によって撮像された複数の画像を画像間のぶれ補正して複数枚ずつ加算して1枚の画像を生成し、生成されたた最新の画像を各垂直同期期間に1回出力するぶれ補正工程と
を有することを特徴とする制御方法。 - 情報処理装置に、請求項8に記載の制御方法の各工程を実行させるためのプログラム。
- 請求項9に記載のプログラムを格納したことを特徴とする情報処理装置が読み取り可能な記憶媒体。
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JPH0698246A (ja) | 1992-09-11 | 1994-04-08 | Canon Inc | 振れ補正装置 |
JP3635282B2 (ja) * | 1996-11-29 | 2005-04-06 | コニカミノルタフォトイメージング株式会社 | ブレ補正カメラ |
JPH11252445A (ja) | 1998-02-26 | 1999-09-17 | Sony Corp | 撮像装置 |
JP2000224470A (ja) * | 1999-02-02 | 2000-08-11 | Minolta Co Ltd | カメラシステム |
US6778210B1 (en) * | 1999-07-15 | 2004-08-17 | Olympus Optical Co., Ltd. | Image pickup apparatus with blur compensation |
JP2002118780A (ja) * | 2000-10-05 | 2002-04-19 | Ricoh Co Ltd | 手振れ補正機能付き撮像装置 |
JP4094253B2 (ja) * | 2001-07-12 | 2008-06-04 | オリンパス株式会社 | 撮像装置 |
JP4438047B2 (ja) * | 2003-07-28 | 2010-03-24 | キヤノン株式会社 | 焦点調節装置、撮像装置、およびその制御方法 |
-
2004
- 2004-12-27 JP JP2004377240A patent/JP4434939B2/ja not_active Expired - Fee Related
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2005
- 2005-12-27 CN CNB200510135223XA patent/CN100466691C/zh not_active Expired - Fee Related
- 2005-12-27 US US11/320,312 patent/US7454131B2/en active Active
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JP2006186592A (ja) | 2006-07-13 |
CN100466691C (zh) | 2009-03-04 |
US7454131B2 (en) | 2008-11-18 |
CN1798264A (zh) | 2006-07-05 |
US20060140600A1 (en) | 2006-06-29 |
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