JPH0388481A - Halation prevention ccd camera equipment - Google Patents
Halation prevention ccd camera equipmentInfo
- Publication number
- JPH0388481A JPH0388481A JP1224228A JP22422889A JPH0388481A JP H0388481 A JPH0388481 A JP H0388481A JP 1224228 A JP1224228 A JP 1224228A JP 22422889 A JP22422889 A JP 22422889A JP H0388481 A JPH0388481 A JP H0388481A
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical filter
- ccd
- subject
- camera device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002265 prevention Effects 0.000 title abstract description 3
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims abstract 2
- 238000010168 coupling process Methods 0.000 claims abstract 2
- 238000005859 coupling reaction Methods 0.000 claims abstract 2
- 230000006866 deterioration Effects 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract 2
- 230000001815 facial effect Effects 0.000 description 3
- 241000282412 Homo Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000113 methacrylic resin Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Transforming Light Signals Into Electric Signals (AREA)
- Closed-Circuit Television Systems (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〉
本発明は、監視用カメラ装置として逆光の状況下に使用
しても、逆光による画質の劣化を防止することができる
ハレーション防止ＣＣＤカメラ装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an anti-halation CCD camera device that can prevent deterioration of image quality due to backlight even when used as a surveillance camera device in a backlit situation. It is something.
（従来の技術〉
従来から、各種銀行の店内、とくにキャッシュデイスペ
ンサーコーナーや商店の売場などにおいて防犯を主目的
として監視用カメラ装置が設置されているが、近年、電
荷結合素子＜ＣＣＯ＞センサを用いたカメラ装置を設置
する事例が増えている。このようなカメラ装置には、露
光量の変化に対する画質の劣化を防止するために、ＡＧ
Ｃアンプやオートアイリスレンズ機能が付加されている
場合が多い。しかしながら、蛍光灯や太陽光が入射する
ために監視する被写体である人隼の背景側の光量の方が
、前面を照射する光量よりも極端に大きくなるといわゆ
る逆光状況となり、このような状況下で得られる人体前
面の画像は、逆光によるハレーションのために人体前面
が暗くなり人相を判別することができない画像しか得ら
れない。したがって、従来は、これを防止するために、
人体前面側に強力な照明を当て得るようにするとか、カ
メラ装置を逆光にならない位置に設置するようなことが
行なわれている。(Conventional technology) Surveillance camera devices have traditionally been installed in various banks, especially in cash dispenser corners and store sales floors, primarily for the purpose of crime prevention, but in recent years, charge coupled device (CCO) sensors have been installed. There are an increasing number of cases in which camera devices are installed using AG.
C amplifier and auto iris lens functions are often added. However, due to the incidence of fluorescent lights and sunlight, if the amount of light on the background side of the human falcon, which is the subject to be monitored, is extremely greater than the amount of light illuminating the front side, a so-called backlight situation will occur. The image of the front of the human body that is obtained is only an image in which the front of the human body is dark due to halation caused by backlighting, and the facial features cannot be distinguished. Therefore, conventionally, to prevent this,
Efforts are being made to illuminate the front side of the human body with strong illumination, or to install camera equipment in a position where it will not be backlit.
（発明が解決しようとする課題）
しかしながら、カメラ装置が設置しである場所にいる人
間にとっては、カメラがあるというだけでも良い感しで
ないものであるのに、その上、強力な照明を受けるとい
うことは、より強い不快感を与えるという問題がある。(Problem to be solved by the invention) However, for people who are in a place where a camera device is installed, the mere presence of a camera does not give a good impression, and on top of that, they are exposed to strong lighting. This has the problem of giving a stronger sense of discomfort.
又、光源として赤外線投光器を用いれば人間に不快感を
与えることはないが、強力な光量を得るには大型・高価
な装置が必要となり一般には困難であるという問題があ
り、逆光にならない位置にカメラ装置を設置する方法は
、設置場所が限定されるという問題がある。In addition, if an infrared projector is used as a light source, it will not cause discomfort to humans, but obtaining a strong amount of light requires large and expensive equipment, which is generally difficult. The method of installing the camera device has a problem in that the installation location is limited.
本発明は、前記問題を解決し、逆光を受ける位置に設置
しても人相を判別し得るような良好な画像を得ることが
できるＣＣＤカメラ装置を得ることを目的とするものて
′ある。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a CCD camera device that can obtain a good image that allows facial recognition even when installed in a position exposed to backlight.
（課題を解決するための手段〉
ＣＣＤセンサの分光感度は、人間の目の可視光域よりも
長波長側の近赤外域までのびている。Ｘ、ハレーション
の原因となる蛍光灯や太陽光の波長成分は、可視光域以
下のものを多く含んでいる。(Means for solving the problem) The spectral sensitivity of CCD sensors extends to the near-infrared region, which is longer wavelength than the visible light region of the human eye. Many of the components are below the visible light range.
そこで、本発明者は可視光域以下の波長成分の光を遮光
あるいは減衰させる光学フィルターを用いてＣＣＤセン
サに入射される逆光成分を減衰させ、かつ、ＣＣＤセン
サの分光感度のある近赤外域の波長を発する赤外発光素
子（ＬＥＤ）を用いて被写体を照射することによって前
記問題を解決し目的を達し得ることを見出して本発明を
完成するに至った。Therefore, the present inventor used an optical filter that blocks or attenuates light in the wavelength component below the visible light range to attenuate the backlight component incident on the CCD sensor, and also uses an optical filter that blocks or attenuates light in the wavelength component below the visible light range. The present invention has been completed by discovering that the above problem can be solved and the object achieved by irradiating a subject using an infrared light emitting element (LED) that emits wavelengths.
すなわち、本発明は、７００ｎｍ〜１３００ｎｍの範囲
の波長のうちのいずれか１つの波長を含む光で被写体を
照明する赤外発光素子を備え、かつ、少なくとも可視光
を遮光又は減衰させる光学フィルターを被写体と電荷結
合素子センサとの間に備えたハレーション防止ＣＣＩ）
カメラ装置である。That is, the present invention provides an infrared light emitting element that illuminates a subject with light containing any one wavelength in the range of 700 nm to 1300 nm, and an optical filter that blocks or attenuates at least visible light. and a charge-coupled device sensor)
It is a camera device.
（作用）
本発明におけるＣＣＤセンサカメラとしては、通常の監
視用として用いられる信号処理回路の中にＡＧＣアンプ
を備え、オートアイリス機能付きレンズを用いたカメラ
を用いればよい。(Function) As the CCD sensor camera in the present invention, a camera that includes an AGC amplifier in a signal processing circuit used for normal monitoring and uses a lens with an auto-iris function may be used.
赤外ＬＥＤとしては、７００ｎｍ〜１３００ｎｍの範囲
の波長のうちの１つの波長の光を発し得るものであれば
よく、被写体を照射し得るようにカメラ側に設置する。The infrared LED may be any infrared LED that can emit light with one wavelength in the range of 700 nm to 1300 nm, and is installed on the camera side so that it can illuminate the subject.
又、光学フィルターとしては、少なくとも可視光を遮光
もしくは減衰し得かつ近赤外光を透過し得るものであれ
ばよく、被写体とＣＣＤセンサとの間に設置するもので
、レンズと被写体との間であっても、レンズとＣＣＤセ
ンサとの間であってもよく、さらに、ＬＥＤの前後のど
ちらに設置してもよい。The optical filter may be any filter that can at least block or attenuate visible light and transmit near-infrared light, and is installed between the subject and the CCD sensor. It may be placed between the lens and the CCD sensor, or it may be placed either before or after the LED.
次に、本発明を添付図面について説明する。The invention will now be described with reference to the accompanying drawings.
第１図は、本発明装置の一実施例を示すブロック図であ
る。FIG. 1 is a block diagram showing an embodiment of the apparatus of the present invention.
本発明のカメラ装置は、第１図に示すように、被写体と
ＣＣＤセンサとの間に光学フィルター２を備え、かつ、
ＬＥＤ ６で被写体を照射するように構成したものであ
り、前記のようにして、被写体である人間に不快感を与
えることなく、容易にハレーションを防止し、良好な画
像を得ることができるものである。As shown in FIG. 1, the camera device of the present invention includes an optical filter 2 between the subject and the CCD sensor, and
It is configured to illuminate the subject with LED 6, and as described above, it is possible to easily prevent halation and obtain a good image without causing discomfort to the human subject. be.
実施例
信号処理回路５の中にＡＧＣアンプを備え、オートアイ
リス機能付きレンズ３を用いたＣＣＤカメラに、レンズ
３の前面に光学フィルター２として、メタクリル樹脂キ
ャスト板パラグラスＩＲ７４厚さ３ｙｎｍ波長７５０１
ｍカットオンフィルター、（協和ガス化学工業株式会社
製〉を設置し、ＬＥＤ ６として型番ＮＪＬ−１１２Ｏ
１発光波長９０００… （新日本無線株式会社製〉に電
流７０ｍＡを流したもの３６個を使用したＣＣＤカメラ
装置を製作した。Example: A CCD camera with an AGC amplifier in the signal processing circuit 5 and a lens 3 with an auto-iris function is equipped with a methacrylic resin cast plate Paraglass IR74, thickness 3ynm, wavelength 7501, as an optical filter 2 in front of the lens 3.
m cut-on filter (manufactured by Kyowa Gas Chemical Industry Co., Ltd.) was installed, and the model number NJL-112O was installed as LED 6.
A CCD camera device was manufactured using 36 units each having an emission wavelength of 9000 nm (manufactured by New Japan Radio Co., Ltd.) and passing a current of 70 mA.
このカメラ装置を使用して人間を被写体１とし、カメラ
装置と被写体１との間隔１ｍ、被写体１前面の照度的２
０ ｌｘの暗い室内で逆光７として晴天日中の屋外照度
的３０００１Ｘを背景として、被写体１の前面を撮影し
た。Using this camera device, a human is taken as the subject 1, the distance between the camera device and the subject 1 is 1 m, and the illuminance in front of the subject 1 is 2.
The front of the subject 1 was photographed in a dark room at 0 lx with backlight 7 and an outdoor illuminance of 30001x on a sunny day as a background.
その結果、被写体の人相が判別できる良好な画像が得ら
れることが認められた。As a result, it was confirmed that a good image could be obtained in which the facial features of the subject could be determined.
辻較倒
実施例のカメラ装置から、光学フィルター２とＬＥＤ
６のいずれか一方、あるいは、両方を取り除いた状態の
カメラ装置として、実施例と同条件下で撮影を行なった
。その結果は、いずれもハレーションのために被写体前
面の画像が暗く、人相を判別することができないものし
か得られなかった。Optical filter 2 and LED from the camera device of the Tsuji comparison example
Photographs were taken under the same conditions as in the example using a camera device in which one or both of the above components were removed. In all cases, the images of the front of the subject were dark due to halation, making it impossible to distinguish the human features.
（発明の効果〉
本発明は、可視光を遮光あるいは減衰させ、かつ、近赤
外光を透過する光学フィルターを備え近赤外ＬＥ［）で
被写体を照射するようにしたＣＣＤカメラ装置であるの
で、人間に不快感を与えることなく、逆光を受ける位置
にカメラ装置を設置してもハレーションを防止し得、ハ
レーションによる画像の劣化を防止し得、良好な画像を
得ることができ、又、簡単な構成であり、小型で経済的
な装置とし得るなど顕著な効果が認められる。(Effects of the Invention) The present invention is a CCD camera device that is equipped with an optical filter that blocks or attenuates visible light and transmits near-infrared light, and illuminates a subject with near-infrared LE. , it is possible to prevent halation even if the camera device is installed in a position subject to backlight without causing discomfort to humans, it is possible to prevent image deterioration due to halation, it is possible to obtain good images, and it is easy to use. It has a simple configuration and has remarkable effects such as being able to be a small and economical device.
第１図は、本発明装置の一実施例を示すブロック図であ
る。
１・・・被写体、２・・・光学フィルター、３・・・レ
ンズ、４・・・ＣＣＤセンサ、５・・・信号処理回路、
６・・・ＬＥＤ光源、７・・・逆光。FIG. 1 is a block diagram showing an embodiment of the apparatus of the present invention. 1... Subject, 2... Optical filter, 3... Lens, 4... CCD sensor, 5... Signal processing circuit,
6...LED light source, 7...backlight.
Claims (1)
ずれか１つの波長を含む赤外光で被写体を照明する赤外
発光素子を備え、かつ、少なくとも可視光を遮光又は減
衰させる光学フィルターを被写体と電荷結合素子センサ
との間に備えたことを特徴とするハレーション防止ＣＣ
Ｄカメラ装置。1) The subject is equipped with an infrared light-emitting element that illuminates the subject with infrared light containing any one wavelength in the range of 700 nm to 1300 nm, and an optical filter that blocks or attenuates at least visible light is connected to the subject. Anti-halation CC characterized by being provided between a coupling element sensor
D camera device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1224228A JPH0388481A (en) | 1989-08-30 | 1989-08-30 | Halation prevention ccd camera equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1224228A JPH0388481A (en) | 1989-08-30 | 1989-08-30 | Halation prevention ccd camera equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0388481A true JPH0388481A (en) | 1991-04-12 |
Family
ID=16810511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1224228A Pending JPH0388481A (en) | 1989-08-30 | 1989-08-30 | Halation prevention ccd camera equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0388481A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07244318A (en) * | 1994-03-07 | 1995-09-19 | Fujitsu Ltd | Image acquiring device |
| EP0966149A2 (en) * | 1998-06-16 | 1999-12-22 | Eastman Kodak Company | Data-reading image capture apparatus, camera, and method of use |
| EP1134545A1 (en) * | 2000-03-15 | 2001-09-19 | Leuze electronic GmbH + Co. | Distance sensor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6448053A (en) * | 1987-08-18 | 1989-02-22 | Matsushita Electric Ind Co Ltd | Video camera device |
-
1989
- 1989-08-30 JP JP1224228A patent/JPH0388481A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6448053A (en) * | 1987-08-18 | 1989-02-22 | Matsushita Electric Ind Co Ltd | Video camera device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07244318A (en) * | 1994-03-07 | 1995-09-19 | Fujitsu Ltd | Image acquiring device |
| EP0966149A2 (en) * | 1998-06-16 | 1999-12-22 | Eastman Kodak Company | Data-reading image capture apparatus, camera, and method of use |
| EP0966149A3 (en) * | 1998-06-16 | 2001-11-07 | Eastman Kodak Company | Data-reading image capture apparatus, camera, and method of use |
| US6700613B1 (en) | 1998-06-16 | 2004-03-02 | Eastman Kodak Company | Data-reading image capture apparatus, camera, and method of use |
| EP1134545A1 (en) * | 2000-03-15 | 2001-09-19 | Leuze electronic GmbH + Co. | Distance sensor |
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