WO2001008416A1 - Systeme d'enregistrement numerique d'images - Google Patents
Systeme d'enregistrement numerique d'images Download PDFInfo
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- WO2001008416A1 WO2001008416A1 PCT/JP2000/005037 JP0005037W WO0108416A1 WO 2001008416 A1 WO2001008416 A1 WO 2001008416A1 JP 0005037 W JP0005037 W JP 0005037W WO 0108416 A1 WO0108416 A1 WO 0108416A1
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- event
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
Definitions
- the present invention relates to a digital image recording system used for crime prevention and the like and capable of recording an image when an event occurs.
- the present invention relates to a measure for providing a system capable of avoiding missing important image information without requiring a high-speed means for image acquisition.
- a surveillance image recording system for the purpose of crime prevention, a surveillance video system that records an image signal from an imaging device such as a surveillance camera using a magnetic tape or the like has been widely used.
- an imaging device such as a surveillance camera using a magnetic tape or the like
- analog signals are recorded on a magnetic tape
- recorded images are degraded and maintenance such as tape replacement is complicated.
- a digital image recording system using a hard disk or the like as a recording medium has been developed in recent years by applying digital technology (for example, Japanese Patent Application Laid-Open No. Hei 6-113251).
- the image information of the monitoring area is recorded intermittently at predetermined time intervals (intermittent recording mode), or the image information of the monitoring area is recorded only when an alarm is input by a sensor or the like.
- intermittent recording mode For example, Japanese Patent Application Laid-Open No. Hei 10-1990 449.
- multiple cameras are used in this type of system. Then, a recording pattern is set for each setting environment of these cameras, and based on the setting, the image information of each monitoring area is intermittently recorded, or an alarm signal from a sensor or the like is used as a trigger to trigger the alarm signal near the alarm signal transmission time.
- the recording mode when the image is recorded is set on the image recording device, and the image is recorded based on this setting.
- the speed of the image acquisition device dominated the speed of the entire system. For example, every A high-performance system can be constructed with an image acquisition device that can acquire 30 images per second.However, if the image acquisition device can acquire only about 10 images per second, the above-mentioned system will be used. The performance is greatly reduced as compared with the above. In other words, when more than 10 events occur per second, image information may not be recorded for some events. For this reason, in the past, the system was configured using a high-speed image acquisition device to avoid missing image information.
- the recording mode when the recording mode is set for each camera, for example, when there is useful information (for example, the presence of an intruder) in the monitoring area while operating in the intermittent recording mode, May also miss that information.
- the recording mode in which the image is recorded only when the event is acquired the image before the alarm signal is transmitted cannot be recorded.
- an object of the present invention is to use a relatively low-speed image acquisition device, and to obtain images from a plurality of cameras with one image acquisition device.
- An object of the present invention is to provide an image recording system capable of recording information without missing information. Disclosure of the invention
- the present invention separates the input of an event from the acquisition of image information, and operates the event input operation and the image information acquisition operation asynchronously.
- image information includes not only “image data itself” but also various accompanying information (various information such as the degree of importance of an acquired image).
- This image recording system includes a plurality of imaging means 2, 2,..., A recording means 4 capable of recording image information photographed by the imaging means 2, 2,.
- Event storage means 5 to be executed, and image information from the imaging means 2 relating to each event are sequentially taken in according to the event occurrence order stored in the event storage means 5 and recorded in the recording means 4.
- Acquisition means 3. With this configuration, when an event that is an image capture request occurs a plurality of times, the event occurrence order is first stored in the event storage unit 5. Even if many events occur in a short time, the order of occurrence is stored in the event storage means 5 without losing important information.
- the image acquiring means 3 takes in the image information from the imaging means 2 relating to the event in accordance with the event occurrence order stored in the storage means 5 and records the information in the recording means 4 in accordance with the order. For this reason, even if the image capturing speed of the image acquiring unit 3 is low, the image information is recorded in the recording unit 4 in the order of occurrence of the event, and it is possible to avoid missing the image information. it can.
- a plurality of image acquisition means 3 are installed in accordance with the number of imaging means 2, and There is no need to keep it. That is, one image acquisition unit 3 can record image information from a plurality of imaging units 2, 2,... Without missing, regardless of the event occurrence speed.
- the image acquisition unit 3 may be configured to multiplex the intermittent image information intermittently acquired from the imaging unit 2 and the alarm image information from the imaging unit related to the occurrence of the alarm when the alarm occurs.
- the alarm occurrence here refers to, for example, a point in time when an alarm signal is transmitted from a sensor for detecting an intruder or a point in time when an artificially operated alarm switch is operated.
- the configuration is provided with an importance storage means 6 for recognizing and storing the importance of the event, and image information relating to each event is recorded in the recording means 4. At this time, the importance of each event stored in the importance storage means 6 may be added to the image information.
- the recording unit 4 records information indicating the importance of the image information. Therefore, it is possible to easily retrieve and extract only particularly useful information (highly important information) from the large number of pieces of image information recorded in the recording means 4.
- the event storage means 5 stores channel numbers corresponding to the imaging means relating to the event in the order of occurrence of the event when the event occurs, and stores the channel number of the imaging means 2 relating to the event when the event occurs.
- the channel number corresponding to the imaging unit related to the event may not be additionally stored.
- the importance storage means 6 compares the importance of both events related to this channel number, and only when the importance of the event to be stored is higher, the importance of the existing event is stored. The event should be stored in place of the importance of the event to be stored.
- FIG. 1 is a basic concept block diagram showing the configuration of the present invention.
- FIG. 2 is a diagram showing the overall configuration of the digital image recording system according to the embodiment of the present invention.
- FIG. 3 is a diagram illustrating an example of an initial state of the waiting queue at the time of “intermittent capturing” in the embodiment of the present invention.
- FIG. 4 is a diagram showing an example of a state of a wait queue when an alarm occurs at the time of “intermittent capture” in the embodiment of the present invention.
- FIG. 5 is a diagram illustrating an example of a state in which event information is written in the event type work in the embodiment of the present invention.
- FIG. 6 is a diagram illustrating an example of a change in a wait queue when an alarm occurs in the embodiment of the present invention.
- FIG. 7 is a time chart showing the event occurrence timing and image information fetch timing when a channel number is input to the waiting queue every time an event occurs in the embodiment of the present invention.
- FIG. 8 is a diagram illustrating an example of a state of a wait queue for describing an operation when a priority is assigned between channels in the embodiment of the present invention.
- FIG. 2 is a plot showing the overall configuration of the digital image recording system 1 of the present embodiment.
- the image recording system 1 includes a plurality (n) of cameras Cl, C2, C3,... ⁇ as imaging means, and these cameras CI, C2, C 3, '"C n
- Each camera CI, C2, C3, ⁇ ' ⁇ ⁇ captures the surveillance area (entrance, garden, corridor, etc.) assigned to each camera.
- the sensors S1, S2, S3,... !! detect the presence of a human body in the monitoring area of the cameras CI, C2, C3, "'Cn. It consists of a pyroelectric sensor that detects an intruder by detecting the emitted infrared energy.
- Alarm switch 8 is activated when a occupant becomes aware of the presence of an intruder. When the hairpin switch 8 is operated, a report is sent to a security company.
- Each of the cameras CI, C2, C3, --Cn, the sensors S1, S2, S3,... Sn, and the alarm switch 8 are connected to the image recording device 50 via cables 9, 9,. It is connected.
- This image recording device 50 includes an image signal switching circuit 51 as image acquisition means, a CPU 52, an image signal processing circuit 53, a recording section 54 as recording means, an image output circuit 55, and a key input section 56. .
- the image signal switching circuit 51 is connected to each of the cameras C1, C2, C3, and Cn, and each of the cameras CI, C2, C3,. It is possible to take in image information from. Further, the image signal switching circuit 51 has a relatively small number of captured images per unit time (slow capture speed), and has, for example, a performance of capturing 10 images per second. In other words, it has the ability to capture still images every 0.1 second.
- the CPU 52 is connected to the sensors SI, S2, S3,... Sn and the alarm switch 8, and outputs an alarm signal from each sensor SI, S2, S3,. Is to be entered.
- an alarm signal is input from any of the sensors S1, S2, S3,.
- the camera recognizes the channel number of the camera corresponding to the sensor that outputs the alarm signal.
- the CPU 52 has a memory 57, which stores “channel image capture setting information” input from a key input unit 56 such as a keyboard (not shown).
- This “channel image capture setting information” is various setting information related to the image capture from each channel, such as the channel image capture sequence in the case of intermittent capture and the switching timing of the image capture channel (switching time interval, etc.). There is.
- the memory 57 is provided with a wait queue unit 58 as an event storage means.
- the wait queue unit 58 stores an order of occurrence of events (an order of capturing images). Is formed.
- This “wait queue” has “wait areas” as many as the number of channels (number of cameras).
- a channel number for capturing image information to the image signal processing circuit 53 via the image signal switching circuit 51 is input according to the capturing order. For example, as shown in Fig. 3, in the initial state of the wait queue at the time of "intermittent capture", the first area (left end in the figure) at the beginning of "wait queue” has channel numbers "1" and "2".
- the channel number corresponding to each area is entered.
- the image information from each of the cameras C1, C2, and C3 is transmitted through the image signal switching circuit 51 in the order of channel number "1", channel number "2", and channel number "3".
- the image information is sequentially captured by the signal processing circuit 53, and finally, the image information of the camera C n of the channel number “n” is captured by the image signal processing circuit 53 via the image signal switching circuit 51.
- the channel number of each area is shifted to the first side (left side in the figure) by one area. Move by minutes.
- the channel number "2" is input to the first area.
- the channel number "3" is input to the second area
- the channel number "4" is input to the third area
- the channel number " n " is input to the (n-1) area.
- the image information is fetched from the channel number “2” into the image signal processing circuit 53 via the image signal switching circuit 51, the channel number of each area moves to the head side by one area again.
- the image information is acquired based on the channel number in the first area, and the image information is taken into the image signal processing circuit 53 via the image signal switching circuit 51 in accordance with the channel number order of the “wait queue”. It is. Note that the order of the channel numbers is not limited to the order described above, and can be set by arbitrarily inputting “channel image capture setting information” using the key input unit 56.
- Such a change of the channel number is also performed when an alarm signal from the sensors S1, S2, S3, '' 'Sn force or a switch signal from the alarm switch 8 is transmitted.
- an alarm signal from the sensors S1, S2, S3, '' 'Sn force or a switch signal from the alarm switch 8 is transmitted.
- the channel number is added to the empty area of. For example, when the sensor S2 installed in the garden sends an alarm signal, the channel number “2” corresponding to the camera C2 monitoring this garden is added to the waiting queue.
- the alarm switch 8 is pressed, for example, the channel number “3” corresponding to the camera C 3 monitoring the corridor is added to the “wait queue”.
- 4 shows a case where an alarm occurs when the image information is taken into the image signal processing circuit 53 via the image signal switching circuit 51 from each channel in the order described above (“intermittent acquisition”).
- 4 shows an example of a state of a waiting queue.
- an alarm signal is transmitted from the sensor S2 corresponding to the channel number “2”. This is the state of the wait queue when the channel number “2” has been input to the empty area Q q at the end of the “wait queue”.
- the memory 57 of the CPU 52 is provided with an event type work unit 59 corresponding to the importance storage means.
- the event type work unit 59 has current event type information for each channel. Is provided, that is, an “event type mark” is provided.
- the “event type work” includes each channel number currently existing in the “wait queue” (from now on, the image signal is switched via the image signal switching circuit 51).
- the information of the event type in the signal processing circuit 53 (channel number for which image information is to be taken in) is stored. For example, there are the following three types of events. In the first event type, the order of the image information taken into the image signal processing circuit 53 via the image signal switching circuit 51 is determined in accordance with the “channel image capture setting information” stored in the memory 57 in advance.
- the second event type is a “sensor alarm” in which, when an alarm signal is transmitted from a sensor S1, S2, S3, image information is read from a channel corresponding to the sensor.
- the third event type is a “switch alarm” in which a resident of the house operates the alarm switch 8 to read image information from a specific channel.
- Event types are written as event type information.
- Information "H” is written.
- event type information is not written in “event type work”.
- the channel number corresponding to the sensor that sent the alarm signal is added.
- FIG. 5 is a diagram illustrating an example of a state in which event information is written in the event type work.
- FIG. 5 shows a state where “L” is added to the channel number “2”, and indicates that the sensor S2 corresponding to the channel number “2” has transmitted an alarm signal. Also, a state is shown in which “H” is added to the channel number “3” associated with the operation of the alarm switch 8.
- FIG. 6 is a diagram illustrating an example of a change in the waiting queue when an alarm occurs.
- Fig. 6 (a) shows a state in which only the channel number "1" has been input to the "wait queue", and the state of Fig. 5 described above ("HJ is added to the channel number” 3 "by operating the alarm switch 8). And the sensor S2 issues an alarm signal and the channel number “2” has “L” added), as shown in Fig. 6 (b), the channel number is added to the end of the waiting queue.
- the Event Type The "work” is in the state shown in Fig. 5.
- the image information of the channel number “3” is captured by the image signal processing circuit 53.
- the information obtained by adding the event type “H” to the image information from the camera 23 with reference to the “event type work” is taken into the image signal processing circuit 53.
- the event type “L” is added to the image information from the camera C2 by referring to the “event type work”. The obtained information is taken into the image signal processing circuit 53.
- information on this “event type work” is given a priority (importance).
- this priority information that is more useful as image information is assigned a higher priority.
- the priority of information is set higher in the order of “intermittent capture”, “sensor alarm”, and “switch alarm”. Have been.
- the channel number to be written is added to the end of the "wait queue”. Instead, compare the event types of these same numbered channels. If the event type of the channel number existing in the “wait queue” has a higher priority than the event type of the channel number to be written, the event type information to be written is canceled. Conversely, if the priority of the event type of the channel number to be written is higher than the event type of the channel number existing in the “wait queue”, the event of that channel number in the “event type work” Replace the type information with the event type information to be written. For example, if the “wait queue” is in the state shown in Fig.
- the image signal processing circuit 53 performs AZD conversion, compression processing, and the like on the image signals sequentially read into the image signal switching circuit 51 based on the “wait queue”, and transmits them to the CPU 52.
- the recording section 54 records the image signal transmitted to the CPU 52 as digital information, and is composed of, for example, a hard disk or a flash memory.
- the image output circuit 55 outputs a surface image signal for displaying an image on an output device such as a CRT (not shown).
- the key input section 56 is used to store the alarm signals from the sensors S 1, S 2, S 3,..., S n. Sets the order of information, outputs image information recorded in the recording section 54 to the image output circuit 55, and searches for a specific one of a large number of image data recorded in the recording section 54. Key input signal to the CPU 52.
- the channel numbers are sequentially input to the “wait queue” as shown in FIG. 3, and when the image information is captured into the image signal processing circuit 53 from the channel number “1”, The channel number of each area moves to the beginning by one area. At the same time, the channel number “1” is input to the last area of the waiting queue. In this way, the image signal processing cycle is sequentially performed from each channel.
- Image information is imported into Road 53. For example, if the “intermittent capture” is set to be performed by two camera switching operations per second, the image signal processing circuit 53 outputs a still image from a different camera every 0.5 seconds, starting from a different camera. It is taken in via the signal switching circuit 51.
- image information from all cameras is taken into the image signal processing circuit 53 via the image signal switching circuit 51 in 5 seconds. Become. Each time the image information captured by the image signal processing circuit 53 is captured, the image signal processing circuit 53 performs an AZD conversion, a compression process, and the like. Recorded in 4. In such a situation in which only “intermittent capture” is performed (a situation in which no alarm signal or switch signal is transmitted), the event type information is not written in “event type”.
- the "wait queue” in response to the alarm signal or the switch signal
- the channel number corresponding to the signal is input to the queue area (Fig. 4 shows the state where the alarm signal is transmitted from the sensor S2 and the channel number “2” is input to the last empty area of the “wait queue”. Shown).
- the event type information corresponding to the signal is written in the “event type work”. "L” is written for an alarm signal, and "H” is written for a switch signal.
- the event types of these same number channels are compared.
- the event type information to be written is canceled. Conversely, if the event type of the channel number to be written has a higher priority than the event type of the channel number existing in the “wait queue”, the event type of that channel number on the “event type work” Replace the information with the event type information to be written.
- the event type information is written in the “event type work” in this way, the image of the channel number is transmitted to the image signal processing circuit 51 via the image signal switching circuit 51.
- information to which event type “L” or “H” is added in addition to the image information (alarm image information) from the camera will be imported.
- the convenience when searching for the image information recorded in the recording unit 54 is improved. In other words, it is possible to search and retrieve only the information with the event type "L” or the event type "H” added from the large number of image information recorded in the recording unit 54. become.
- FIG. 7 shows the event occurrence timing and image information acquisition timing when the channel number is input to the waiting queue every time an event occurs instead of performing “intermittent acquisition” in the embodiment of the present invention.
- FIG. 7 (a) the points of occurrence of events are indicated by arrows.
- FIG. 7 (b) shows the timing of capturing image information that is captured by the image signal processing circuit 53 via the image signal switching circuit 51 in the order of occurrence of the event.
- “ ⁇ J” indicates the case where the captured image exists, and “ ⁇ ”indicates the case where the captured image does not exist.
- the priority is assigned to the event types.
- the priority may be assigned to each channel. For example, if it is set that the smaller the channel number is, the higher the priority is. If an event occurs on channel “1” in the “wait queue” state shown in FIG. 8, the channel number “2” in the first area A 1 “” And enter the channel number “1”. When an event occurs in channel "3”, the channel number "4" in the third area A3 is deleted and the channel number "3" is input.
- priorities may be assigned to event types, and priorities may be assigned between channels.
- the input of an event and the acquisition of image information are separated, and the event input operation and the image information acquisition operation operate asynchronously.
- the image signal switching circuit 51 which is a means for acquiring image information
- image information can be acquired with a delay time within (the number of channels) X (maximum speed of the image signal switching circuit) from the occurrence of the event, so it has sufficient performance as a security system .
- one image signal switching circuit 51 can cope with a plurality of channels, the configuration of the entire system can be simplified, and thereby the cost of the system can be reduced.
- the present invention is adopted as a home security system.
- the present invention is not limited to this, and can be adopted as a security system for offices and stores.
- the camera and the sensor are separately installed.
- a camera with a sensor in which these forces are integrated can also be employed.
- a pyroelectric sensor is used as a means for detecting an intruder
- various detection means such as a motion detector, which detects an intruder based on a change in luminance of a monitoring area, can be employed.
- the security system requires long-term continuous recording, but the recording capacity of the recording unit 54 is limited. For this reason, a configuration may be adopted in which image information with a low importance of the event type is appropriately deleted and new image information is overwritten.
- the digital image recording system of the present invention can acquire image information for each channel substantially equally without using important events while using relatively inexpensive image acquisition means. Recordable, reliable, and economical.
- one image acquisition unit can handle multiple channels, This is useful because the configuration of the entire system can be simplified and costs can be reduced, as compared with a system having an image acquisition means for each file. Furthermore, it is easy to handle the recorded image information, and it is effective as a highly practical system.
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Closed-Circuit Television Systems (AREA)
- Television Signal Processing For Recording (AREA)
- Burglar Alarm Systems (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00948261A EP1119198A4 (en) | 1999-07-28 | 2000-07-27 | DIGITAL IMAGE RECORDING SYSTEM |
US09/806,233 US6807360B1 (en) | 1999-07-28 | 2000-07-27 | Digital image recording system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11214311A JP2001045474A (ja) | 1999-07-28 | 1999-07-28 | ディジタル画像記録システム |
JP11/214311 | 1999-07-28 |
Publications (1)
Publication Number | Publication Date |
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WO2001008416A1 true WO2001008416A1 (fr) | 2001-02-01 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2000/005037 WO2001008416A1 (fr) | 1999-07-28 | 2000-07-27 | Systeme d'enregistrement numerique d'images |
Country Status (4)
Country | Link |
---|---|
US (1) | US6807360B1 (ja) |
EP (1) | EP1119198A4 (ja) |
JP (1) | JP2001045474A (ja) |
WO (1) | WO2001008416A1 (ja) |
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US10133718B2 (en) | 2014-07-18 | 2018-11-20 | FHOOSH, Inc. | Systems and methods for locating, identifying and mapping electronic form fields |
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JP4536299B2 (ja) * | 2001-08-29 | 2010-09-01 | パナソニック株式会社 | イベント映像記録・再生システム、イベント管理装置、およびローカル記録装置 |
CA2364230A1 (en) * | 2001-12-03 | 2003-06-03 | Tim Lambert | Video security and control system |
US6791603B2 (en) * | 2002-12-03 | 2004-09-14 | Sensormatic Electronics Corporation | Event driven video tracking system |
JP2005094443A (ja) * | 2003-09-18 | 2005-04-07 | Ramrock Eizo Gijutsu Kenkyusho:Kk | 監視システム |
JP4498104B2 (ja) * | 2004-11-16 | 2010-07-07 | キヤノン株式会社 | 監視装置、その制御方法、およびプログラム |
JP4738142B2 (ja) * | 2005-11-17 | 2011-08-03 | 三菱電機株式会社 | 侵入監視システム |
KR100708884B1 (ko) | 2006-02-06 | 2007-04-18 | 주식회사 우주아이티 | 촬영 경로 정보에 따라 네트워크 카메라 촬영 영상을사용자 단말기로 순차적으로 제공하는 장치 및 방법 |
US7940955B2 (en) * | 2006-07-26 | 2011-05-10 | Delphi Technologies, Inc. | Vision-based method of determining cargo status by boundary detection |
WO2013042017A1 (en) * | 2011-09-22 | 2013-03-28 | Koninklijke Philips Electronics N.V. | Imaging service using outdoor lighting networks |
JP5816117B2 (ja) * | 2012-03-29 | 2015-11-18 | アイホン株式会社 | インターホンシステム |
US20140184803A1 (en) * | 2012-12-31 | 2014-07-03 | Microsoft Corporation | Secure and Private Tracking Across Multiple Cameras |
US20230185850A1 (en) * | 2020-04-16 | 2023-06-15 | Nec Corporation | Display control device, surveillance support system, display control method, and non-transitory computer-readable medium |
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US10133718B2 (en) | 2014-07-18 | 2018-11-20 | FHOOSH, Inc. | Systems and methods for locating, identifying and mapping electronic form fields |
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EP1119198A1 (en) | 2001-07-25 |
US6807360B1 (en) | 2004-10-19 |
EP1119198A4 (en) | 2003-01-29 |
JP2001045474A (ja) | 2001-02-16 |
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