WO1998052351A1 - Dispositif autofocus - Google Patents
Dispositif autofocus Download PDFInfo
- Publication number
- WO1998052351A1 WO1998052351A1 PCT/JP1998/002153 JP9802153W WO9852351A1 WO 1998052351 A1 WO1998052351 A1 WO 1998052351A1 JP 9802153 W JP9802153 W JP 9802153W WO 9852351 A1 WO9852351 A1 WO 9852351A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- iris
- value
- evaluation value
- circuit
- area
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/75—Circuitry for compensating brightness variation in the scene by influencing optical camera components
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
- H04N23/673—Focus control based on electronic image sensor signals based on contrast or high frequency components of image signals, e.g. hill climbing method
Definitions
- the present invention relates to an autofocus device, and more particularly, to an autofocus device such as a video camera.
- the integrating circuit 82 is a digital integrating circuit composed of an AZD converter, an adder for adding the output of the AZD converter and the output of the subsequent latch circuit, and a latch circuit for latching the added output. It consists of. Then, the integrating circuit 82 stores the integrated value of one field of the low-frequency component of the luminance signal in each of the areas A1 to A6 in the memory 83. The data in the memory 83 is updated every field.
- a high-brightness cut circuit 91 the iris 2 is narrowed down in a normal bright scene and the iris 2 is not fully opened. Therefore, the luminance signal component of the video signal output from the color separation circuit 5 is directly used as a high-pass filter (HPF) 9 2
- the D high-pass filter 92 outputs the low-frequency component of the video signal to the detection circuit 93.
- the detection circuit 93 detects a high-frequency component of the brightness signal. This detection output is converted into a digital value by the A / D conversion circuit 94 and is supplied to the integration circuit 96.
- the integrating circuit 96 integrates the given luminance signal of each area to create a focus evaluation value.
- the focus evaluation value generating circuit 9 configured as described above always outputs a focus evaluation value for one field.
- the high luminance section power circuit 91 prohibits the output of the luminance signal and excludes the accumulation of the luminance signal by the integrating circuit 96.
- the high luminance section cut circuit 91 outputs the luminance signal without cutting it in step S16.
- the integration of the high-frequency component in that region is performed by the integration circuit 96.
- the same operation as described above is performed for the next area.
- the threshold value is set to a predetermined value by the threshold value generation circuit 16. If the opening area of the iris 2 is equal to or smaller than a predetermined value in 4, the threshold value is set according to the opening area of the iris 2.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Automatic Focus Adjustment (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69836017T DE69836017T2 (de) | 1997-05-16 | 1998-05-15 | Automatische fokusiereinrichtung |
EP98919617A EP0987884B1 (en) | 1997-05-16 | 1998-05-15 | Automatic focusing device |
JP10549059A JP3036850B2 (ja) | 1997-05-16 | 1998-05-15 | 自動焦点装置 |
US09/308,617 US6636262B1 (en) | 1997-05-16 | 1998-05-15 | Automatic focusing device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12656497 | 1997-05-16 | ||
JP9/126564 | 1997-05-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998052351A1 true WO1998052351A1 (fr) | 1998-11-19 |
Family
ID=14938291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1998/002153 WO1998052351A1 (fr) | 1997-05-16 | 1998-05-15 | Dispositif autofocus |
Country Status (5)
Country | Link |
---|---|
US (1) | US6636262B1 (ja) |
EP (1) | EP0987884B1 (ja) |
KR (1) | KR100341253B1 (ja) |
DE (1) | DE69836017T2 (ja) |
WO (1) | WO1998052351A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003101857A (ja) * | 2001-09-19 | 2003-04-04 | Sony Corp | 撮像装置 |
KR100769558B1 (ko) * | 2005-12-29 | 2007-10-23 | 엠텍비젼 주식회사 | 컬러 보간에 사용되는 임계값 결정 장치 및 방법 |
KR100769561B1 (ko) | 2005-12-29 | 2007-10-23 | 엠텍비젼 주식회사 | 노이즈 제거에 사용되는 임계값 결정 장치 및 방법 |
KR100795343B1 (ko) | 2005-03-15 | 2008-01-17 | 윈본드 일렉트로닉스 코포레이션 | 이미지 캡쳐링 시스템 및 방법 |
CN100372369C (zh) * | 2000-03-10 | 2008-02-27 | 三洋电机株式会社 | 数码相机 |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060033831A1 (en) * | 1999-09-14 | 2006-02-16 | Nikon Corporation | Electronic still camera |
US6974938B1 (en) | 2000-03-08 | 2005-12-13 | Tibotec Bvba | Microscope having a stable autofocusing apparatus |
JP2001281529A (ja) * | 2000-03-29 | 2001-10-10 | Minolta Co Ltd | デジタルカメラ |
JP3938833B2 (ja) * | 2000-04-27 | 2007-06-27 | 株式会社リコー | 露出制御装置 |
JP4305598B2 (ja) * | 2000-06-05 | 2009-07-29 | 富士フイルム株式会社 | カメラの絞り制御方法及び装置、並びにカメラ |
US7574016B2 (en) * | 2003-06-26 | 2009-08-11 | Fotonation Vision Limited | Digital image processing using face detection information |
US7565030B2 (en) | 2003-06-26 | 2009-07-21 | Fotonation Vision Limited | Detecting orientation of digital images using face detection information |
US20080037972A1 (en) * | 2003-09-22 | 2008-02-14 | Sharp Kabushiki Kaisha | Photographing Lens Position Control Device |
KR100647955B1 (ko) * | 2004-12-03 | 2006-11-23 | 엘지전자 주식회사 | 디포커스 현상을 보정하는 영상처리장치 |
JP2007089086A (ja) * | 2005-09-26 | 2007-04-05 | Sony Ericsson Mobilecommunications Japan Inc | 携帯情報端末及び画像管理プログラム |
JP2007243336A (ja) * | 2006-03-06 | 2007-09-20 | Fujifilm Corp | 撮像装置 |
US8237850B2 (en) | 2007-08-27 | 2012-08-07 | Sanyo Electric Co., Ltd. | Electronic camera that adjusts the distance from an optical lens to an imaging surface |
JP6019556B2 (ja) * | 2011-09-08 | 2016-11-02 | 株式会社ニコン | 焦点検出装置、撮像装置、およびカメラ。 |
JP2016128890A (ja) * | 2015-01-09 | 2016-07-14 | キヤノン株式会社 | 撮像装置及びその制御方法、プログラム、記憶媒体 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6320972A (ja) * | 1986-07-15 | 1988-01-28 | Matsushita Electric Ind Co Ltd | 自動焦点整合装置 |
JPH01157173A (ja) * | 1987-12-14 | 1989-06-20 | Canon Inc | 自動焦点整合装置 |
JPH02132977A (ja) * | 1988-11-14 | 1990-05-22 | Sanyo Electric Co Ltd | オートフォーカスビデオカメラ |
JPH04329078A (ja) * | 1991-04-30 | 1992-11-17 | Matsushita Electric Ind Co Ltd | オートフォーカス装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3907664A1 (de) * | 1988-03-11 | 1989-10-19 | Canon Kk | Bildaufnahmeeinrichtung |
GB2219461B (en) * | 1988-05-02 | 1992-11-18 | Canon Kk | Exposure control device |
DE68914712T2 (de) * | 1988-05-11 | 1994-10-13 | Sanyo Electric Co | Bildsensorapparat mit einer automatischen Fokussiereinrichtung für automatische Fokusanpassung in Abhängigkeit von Videosignalen. |
JP2538341B2 (ja) | 1989-06-28 | 1996-09-25 | 三洋電機株式会社 | 自動露出調整装置 |
JP2708924B2 (ja) | 1990-03-08 | 1998-02-04 | 三洋電機株式会社 | オートフォーカスビデオカメラ |
JP3106006B2 (ja) * | 1992-06-24 | 2000-11-06 | キヤノン株式会社 | 電子スチルカメラ |
US6236431B1 (en) * | 1993-05-27 | 2001-05-22 | Canon Kabushiki Kaisha | Video camera apparatus with distance measurement area adjusted based on electronic magnification |
EP0774865A3 (en) * | 1995-11-17 | 2000-06-07 | SANYO ELECTRIC Co., Ltd. | Video camera with high speed mode |
-
1998
- 1998-05-15 US US09/308,617 patent/US6636262B1/en not_active Expired - Fee Related
- 1998-05-15 EP EP98919617A patent/EP0987884B1/en not_active Expired - Lifetime
- 1998-05-15 DE DE69836017T patent/DE69836017T2/de not_active Expired - Lifetime
- 1998-05-15 WO PCT/JP1998/002153 patent/WO1998052351A1/ja active IP Right Grant
- 1998-05-15 KR KR1019997010533A patent/KR100341253B1/ko not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6320972A (ja) * | 1986-07-15 | 1988-01-28 | Matsushita Electric Ind Co Ltd | 自動焦点整合装置 |
JPH01157173A (ja) * | 1987-12-14 | 1989-06-20 | Canon Inc | 自動焦点整合装置 |
JPH02132977A (ja) * | 1988-11-14 | 1990-05-22 | Sanyo Electric Co Ltd | オートフォーカスビデオカメラ |
JPH04329078A (ja) * | 1991-04-30 | 1992-11-17 | Matsushita Electric Ind Co Ltd | オートフォーカス装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0987884A4 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100372369C (zh) * | 2000-03-10 | 2008-02-27 | 三洋电机株式会社 | 数码相机 |
US7420612B2 (en) | 2000-03-10 | 2008-09-02 | Sanyo Electric Co., Ltd. | Digital camera |
JP2003101857A (ja) * | 2001-09-19 | 2003-04-04 | Sony Corp | 撮像装置 |
JP4696429B2 (ja) * | 2001-09-19 | 2011-06-08 | ソニー株式会社 | 撮像装置 |
KR100795343B1 (ko) | 2005-03-15 | 2008-01-17 | 윈본드 일렉트로닉스 코포레이션 | 이미지 캡쳐링 시스템 및 방법 |
KR100769558B1 (ko) * | 2005-12-29 | 2007-10-23 | 엠텍비젼 주식회사 | 컬러 보간에 사용되는 임계값 결정 장치 및 방법 |
KR100769561B1 (ko) | 2005-12-29 | 2007-10-23 | 엠텍비젼 주식회사 | 노이즈 제거에 사용되는 임계값 결정 장치 및 방법 |
Also Published As
Publication number | Publication date |
---|---|
DE69836017D1 (de) | 2006-11-09 |
KR20010012576A (ko) | 2001-02-15 |
DE69836017T2 (de) | 2007-06-06 |
KR100341253B1 (ko) | 2002-06-22 |
EP0987884A4 (en) | 2002-03-27 |
EP0987884B1 (en) | 2006-09-27 |
US6636262B1 (en) | 2003-10-21 |
EP0987884A1 (en) | 2000-03-22 |
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