JP3124915B2 - A method for detecting a disturbance to a surveillance camera in a still image transmission type monitoring device - Google Patents
A method for detecting a disturbance to a surveillance camera in a still image transmission type monitoring deviceInfo
- Publication number
- JP3124915B2 JP3124915B2 JP07250160A JP25016095A JP3124915B2 JP 3124915 B2 JP3124915 B2 JP 3124915B2 JP 07250160 A JP07250160 A JP 07250160A JP 25016095 A JP25016095 A JP 25016095A JP 3124915 B2 JP3124915 B2 JP 3124915B2
- Authority
- JP
- Japan
- Prior art keywords
- monitoring
- monitoring device
- still image
- camera
- image
- 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.)
- Expired - Fee Related
Links
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Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【発明の属する技術分野】本発明は、画像伝送形式の監
視装置によるセキュリティ・システムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a security system using an image transmission type monitoring device.
【０００２】[0002]
【従来の技術】セキュリティ・システムにおいて使用さ
れている従来の画像伝送形式の監視装置は、図２に示す
ように、送信側の監視装置２０１と受信側の監視装置２
０２によって構成している。監視装置２０１における監
視用カメラ１０６により撮影した静止画像はフレームメ
モリ１０５に格納される。このフレームメモリ１０５に
格納された画像データは、監視装置２０１を統括制御す
るＣＰＵ１０１，画像処理プログラムを格納しているＲ
ＯＭ１０２，高速演算用の演算プロセッサ１０４，各処
理に必要なメモリより成るＲＡＭ１０３等によって圧縮
処理されてデータ量を減少させ、通信制御部１０７，通
信回線１０８を介して監視装置２０２に画像データを送
信する。2. Description of the Related Art As shown in FIG. 2, a conventional monitoring apparatus of an image transmission type used in a security system includes a monitoring apparatus 201 on a transmitting side and a monitoring apparatus 2 on a receiving side.
02. Still images captured by the monitoring camera 106 in the monitoring device 201 are stored in the frame memory 105. The image data stored in the frame memory 105 includes a CPU 101 that controls the monitoring device 201 and an R that stores an image processing program.
The data amount is reduced by compression processing by the OM 102, the arithmetic processor 104 for high-speed operation, the RAM 103 including a memory required for each processing, and the image data is transmitted to the monitoring device 202 via the communication control unit 107 and the communication line 108. I do.
【０００３】監視装置２０２においては、通信制御部１
１７を介して入力した画像データを一旦ＲＡＭ１１３に
格納しておき、ＣＰＵ１１１，ＲＯＭ１１２，ＲＡＭ１
１３，演算プロセッサ１１４等によってＲＡＭ１１３に
格納してある画像データに伸張処理を施した静止画像を
フレームメモリ１１５を介して表示装置１１６に表示さ
せ、監視者（操作者）が監視対象物の状態を確認してい
た。上述した監視装置によって常時監視することも可能
であるが、監視対象物の環境条件に対応させて特定の時
間帯のみ監視を行い、監視する必要がない時間帯におい
ては監視解除とし、画像伝送も中止していた。In the monitoring device 202, the communication control unit 1
17 is temporarily stored in the RAM 113, and the CPU 111, the ROM 112, the RAM 1
13, a still image obtained by subjecting the image data stored in the RAM 113 to expansion processing by the arithmetic processor 114 or the like is displayed on the display device 116 via the frame memory 115, and the observer (operator) displays the state of the monitored object. I was checking. Although it is possible to constantly monitor by the above-described monitoring device, monitoring is performed only in a specific time zone in accordance with the environmental conditions of the monitoring target, monitoring is canceled in a time zone where monitoring is not necessary, and image transmission is also performed. Had been discontinued.
【０００４】[0004]
【発明が解決しようとする課題】監視解除中の監視用カ
メラ１０６のレンズに、スプレーの吹き付けやテープの
接着等による撮影妨害を受けた状態で監視を開始する
と、監視用カメラ１０６は監視対象物を撮影していない
ので、監視装置２０２における表示装置１１６に表示さ
れる静止画像から監視対象物の状況を把握することはで
きないことになる。また、監視中において発生した撮影
妨害であっても、多数の監視カメラを一括して監視して
いる場合には、監視者（操作者）による異状発見が遅れ
る恐れもあった。本発明は、上述した従来方式の監視装
置における欠点を解消するためになされたものであっ
て、監視中および監視解除中に係わらず、監視装置２０
１における監視用カメラ１０６に対する撮影妨害を検出
し、監視装置２０２にその異状を自動的に表示・警報さ
せるようにするものである。When the monitoring is started in a state where the lens of the monitoring camera 106 whose monitoring is released is interrupted by the spraying or the adhesion of the tape to the lens, the monitoring camera 106 starts to monitor. , The status of the monitoring target cannot be grasped from the still image displayed on the display device 116 of the monitoring device 202. In addition, even if a shooting disturbance occurs during monitoring, if a large number of surveillance cameras are monitored in a lump, there is a possibility that the abnormality detection by the observer (operator) may be delayed. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described drawbacks of the conventional monitoring apparatus, and has been made in consideration of the monitoring apparatus 20 regardless of whether monitoring is being performed or monitoring is being canceled.
1 is to detect a photographing disturbance to the surveillance camera 106 and cause the monitoring device 202 to automatically display and warn of the abnormality.
【０００５】[0005]
【課題を解決するための手段】上述した課題を解決する
ために、本発明による監視用カメラに対する撮影妨害の
検出方法は、監視装置２０１における監視用カメラによ
り撮影した静止画像を圧縮処理した画像データのデータ
量が、予め設定してあるデータ量の閾値より減少したこ
とが検出されたときは、前記監視カメラによる撮影に異
状が発生したことを監視装置２０２に表示・警報させる
ようにしたものである。In order to solve the above-mentioned problems, a method of detecting a photographing disturbance to a surveillance camera according to the present invention is performed by compressing a still image photographed by a surveillance camera in a surveillance apparatus 201 into image data. When it is detected that the data amount has decreased below a preset data amount threshold, the monitoring device 202 is caused to display and warn that an abnormality has occurred in the shooting by the monitoring camera. is there.
【０００６】[0006]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照しながら説明する。図１は、本発明に係る画像伝
送形式による監視装置の構成を示すブロック図である。
図１において、第１の監視装置１は、監視装置１を統括
制御するＣＰＵ１，通信処理および画像処理プログラム
を格納しているＲＯＭ２，各処理に必要なメモリより成
るＲＡＭ３，高速演算用の演算プロセッサ４，画像デー
タを格納するフレームメモリ５，静止画像撮影用の監視
用カメラ６，通信回線８を制御する通信制御部７によっ
て構成している。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a monitoring device using an image transmission format according to the present invention.
In FIG. 1, a first monitoring device 1 includes a CPU 1 for overall control of the monitoring device 1, a ROM storing a communication process and an image processing program, a RAM including memories required for each process, and an arithmetic processor for high-speed operation. 4, a frame memory for storing image data, a monitoring camera for photographing a still image, and a communication control unit 7 for controlling a communication line 8.
【０００７】また、第２の監視装置２は、監視装置２を
統括制御するＣＰＵ１１，通信処理および画像処理プロ
グラムを格納しているＲＯＭ１２，各処理に必要なメモ
リより成るＲＡＭ１３，高速演算用の演算プロセッサ１
４，画像データを格納するフレームメモリ１５，画像を
表示する表示装置１６，監視用カメラ６の異状を警報す
る警報装置１８，通信回線８を制御する通信制御部１７
によって構成している。The second monitoring device 2 includes a CPU 11 for overall control of the monitoring device 2, a ROM 12 for storing communication processing and image processing programs, a RAM 13 comprising a memory required for each processing, and an arithmetic operation for high-speed operation. Processor 1
4, a frame memory 15 for storing image data, a display device 16 for displaying images, an alarm device 18 for alarming abnormalities of the monitoring camera 6, and a communication control unit 17 for controlling the communication line 8.
It is constituted by.
【０００８】第１の監視装置１において、監視用カメラ
６によって撮影された監視対象物の静止画像の画像デー
タはフレームメモリ５に格納され、ＲＯＭ２に格納して
ある画像処理プログラムに基づき、演算プロセッサ４に
よって高速演算されて圧縮処理される。圧縮処理は、任
意に画像データに対して周波数変換および量子化処理を
行い、最終的に、出現頻度の高い数値を短いビット数
に、出現頻度の低い数値を長いビット数に変換すること
により、全体のデータ量を減少させる。In the first monitoring device 1, image data of a still image of a monitoring target imaged by the monitoring camera 6 is stored in a frame memory 5, and based on an image processing program stored in a ROM 2, an arithmetic processor is used. 4 for high-speed operation and compression processing. The compression process arbitrarily performs a frequency conversion and a quantization process on image data, and finally converts a numerical value with a high frequency of appearance into a short number of bits and a numerical value with a low frequency of appearance into a long number of bits. Decrease overall data volume.
【０００９】第１の監視装置１における監視用カメラ６
のレンズがスプレーの吹き付けやテープの接着等によっ
て撮影妨害を受けた状態では、監視対象物を撮影した画
像は一様に暗くて平坦な画像となり、各画素の値は変動
が少ないものとなる。従って、圧縮処理を施した画像デ
ータのデータ量は、正常時における圧縮後のデータ量よ
りも非常に少なくなる。従って、予め設定してあるデー
タ量の閾値と比較すると、容易に監視用カメラ６のレン
ズの異常が検出される。上述したデータ量の異常検出は
演算プロセッサ４によって実行され、異常検出信号は通
信制御部７と通信回線８を介して第２の監視装置２に入
力される。第２の監視装置２においては、受信した画像
データが正常な場合には伸張処理を行ってフレームメモ
リ１５を介して表示装置１６に静止画像を表示するが、
監視用カメラ６に対する撮影妨害が検出された場合に
は、そのメッセージを表示装置１６に表示させると共
に、警報装置１８によって警報して監視者（操作者）に
知らせる。The monitoring camera 6 in the first monitoring device 1
In the state where the lens is disturbed by spraying, tape adhesion, or the like, the image of the monitored object is uniformly dark and flat, and the value of each pixel has little fluctuation. Therefore, the data amount of the compressed image data is much smaller than the data amount after normal compression. Therefore, when compared with a preset data amount threshold value, abnormality of the lens of the monitoring camera 6 is easily detected. Abnormality detection of the data amount described above is executed by the arithmetic processor 4, and an abnormality detection signal is input to the second monitoring device 2 via the communication control unit 7 and the communication line 8. When the received image data is normal, the second monitoring device 2 performs a decompression process and displays a still image on the display device 16 via the frame memory 15.
When the photographing disturbance to the monitoring camera 6 is detected, the message is displayed on the display device 16 and a warning is given by a warning device 18 to notify the monitoring person (operator).
【００１０】[0010]
【発明の効果】以上説明したように、本発明に係る監視
用カメラに対する撮影妨害の検出方法は、第１の監視装
置における監視用カメラが撮影妨害されて監視対象物を
撮影することができない状態になると、自動的にその異
常を検出して第２の監視装置へその情報を伝送するの
で、第２の監視装置の監視者（操作者）は迅速に対処す
ることが可能である。As described above, according to the method of detecting a photographing disturbance to a surveillance camera according to the present invention, the surveillance camera in the first surveillance device is disturbed by photographing and cannot photograph a monitored object. Then, the abnormality is automatically detected and the information is transmitted to the second monitoring device, so that the observer (operator) of the second monitoring device can take prompt action.
【図１】本発明に係る画像伝送形式による監視装置の構
成を示すブロック図。FIG. 1 is a block diagram showing a configuration of a monitoring device using an image transmission format according to the present invention.
【図２】従来技術による画像伝送形式による監視装置の
構成を示すブロック図。FIG. 2 is a block diagram showing a configuration of a monitoring apparatus using a conventional image transmission format.
１，１１ ＣＰＵ ２，１２ ＲＯＭ ３，１３ ＲＡＭ ４，１４ 演算プロセッサ ５，１５ フレームメモリ ６ 監視用カメラ ７，１７ 通信制御部 ８ 通信回線 １６ 表示装置 １８ 警報装置 1,11 CPU 2,12 ROM 3,13 RAM 4,14 Arithmetic processor 5,15 Frame memory 6 Monitoring camera 7,17 Communication control unit 8 Communication line 16 Display device 18 Alarm device
Claims (1)
の静止画像を圧縮処理した画像データとして送信する第
１の監視装置と、第１の監視装置からの画像データを受
信して伸張処理を施し、監視対象物の静止画像に復元し
て表示装置に表示させ監視を行う第２の監視装置と、に
よって構成した静止画像伝送形式の監視装置において、 第１の監視装置における監視カメラにより撮影した静止
画像を圧縮処理した画像データのデータ量が、予め設定
してあるデータ量の閾値より減少したことが検出された
ときは、前記監視カメラによる撮影に異状が発生したこ
とを第２の監視装置に表示・警報させるようにしたこと
を特徴とする監視用カメラに対する撮影妨害の検出方
法。1. A first monitoring device that transmits a still image of a monitoring target object captured by a monitoring camera as compressed image data, and receives image data from the first monitoring device and performs decompression processing. A second monitoring device for restoring a still image of the monitored object and displaying the same on a display device for monitoring, wherein a still image transmission format monitoring device configured by the first monitoring device captures a still image captured by a monitoring camera in the first monitoring device. When it is detected that the data amount of the image data obtained by compressing the image is smaller than a preset data amount threshold, the second monitoring device notifies the second monitoring device that an abnormality has occurred in the shooting by the monitoring camera. A method for detecting an obstruction of photographing of a surveillance camera characterized by displaying and warning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07250160A JP3124915B2 (en) | 1995-09-04 | 1995-09-04 | A method for detecting a disturbance to a surveillance camera in a still image transmission type monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07250160A JP3124915B2 (en) | 1995-09-04 | 1995-09-04 | A method for detecting a disturbance to a surveillance camera in a still image transmission type monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0974553A JPH0974553A (en) | 1997-03-18 |
| JP3124915B2 true JP3124915B2 (en) | 2001-01-15 |
Family
ID=17203719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07250160A Expired - Fee Related JP3124915B2 (en) | 1995-09-04 | 1995-09-04 | A method for detecting a disturbance to a surveillance camera in a still image transmission type monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3124915B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3888793B2 (en) * | 1998-12-28 | 2007-03-07 | セコム株式会社 | Image sensor |
| JP4503742B2 (en) * | 1999-10-20 | 2010-07-14 | 綜合警備保障株式会社 | Combined sensor |
| JP4529779B2 (en) | 2005-04-20 | 2010-08-25 | 株式会社日立製作所 | Monitoring system |
-
1995
- 1995-09-04 JP JP07250160A patent/JP3124915B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0974553A (en) | 1997-03-18 |
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