JP2008172698A - Surveillance camera system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve convenience of surveillance in a surveillance camera system for reproducing images of a plurality of channels on one screen. <P>SOLUTION: The surveillance camera system comprises a plurality of imaging means for acquiring an image of each channel, grouping means for arbitrary grouping each channel, abnormality detecting means of each channel, and displaying means for displaying an image of a channel in which abnormality is detected in a first mode and displaying an image of a channel of a group to which an abnormality-detected image belongs in a second mode. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

    The present invention relates to a monitoring camera system that displays images from a plurality of monitoring cameras on a monitor with a multi-screen or the like. In particular, for example, an image from a monitoring camera in which an abnormality is detected and an image from another monitoring camera are displayed according to certain conditions. The present invention relates to an imaging system to be displayed.

  Conventionally, a plurality of surveillance cameras are used to monitor an outdoor or indoor area and acquire a surveillance video, which is useful for people's safety and crime prevention. In particular, it is highly possible that an important image can be acquired from a monitoring video from a camera in which an abnormality is detected.

  Then, when monitoring an arbitrary area outdoors or indoor and acquiring a monitoring video, if the area is a more important area, a video is acquired from a plurality of angles using a plurality of monitoring cameras, or the area In some cases, images from the periphery of the image are acquired and monitored by performing a multi-screen display in which a plurality of images can be confirmed together on one screen.

A multi-screen as a still image at a timer-set interval for a camera in which an abnormality is detected so that the images of the camera in which an abnormality is detected can be identified in a state where a plurality of videos are displayed in the multi-screen display state described above. Patent Document 1 discloses a surveillance camera system that performs display.
JP 2002-58015 A [H04N 7/18, H04N 5/765, H04N 5/783]

  In the surveillance camera system according to the prior art 1, when an abnormality is detected for a preset camera, it is possible to automatically display a multi-screen still image in time series.

  However, in the surveillance camera system of the prior art 1, only a camera that detects an abnormality can display a still image, but only a still image in one direction can be obtained. In this case, the video is displayed on the other camera, but if a video that is not related to the camera that detected the abnormality is displayed, the video that is not related to the observer enters the field of view, and conversely it is difficult to monitor. There is a risk.

  The present invention solves the above-described problem, and an object thereof is to provide an imaging system that improves the convenience of monitoring in a monitoring camera system that reproduces a plurality of videos on one screen.

  According to a first aspect of the present invention, there is provided a surveillance camera system comprising: a plurality of imaging means for acquiring images of each channel; a grouping means for arbitrarily grouping each channel; and an abnormality detection means for detecting an abnormality in each channel. When an abnormality is detected by the abnormality detection means, the image of the channel in which the abnormality is detected is displayed in the first form, and the image of the channel of the group to which the image in which the abnormality is detected belongs is in the second form. It is characterized by comprising display means for displaying in (3).

  According to the first invention, when one of the channels of the arbitrarily set group detects an abnormality, the image of the channel in which the abnormality is detected and the image of the other channel of the group are displayed in the same form on the same screen. Since it is output, it can be confirmed at the same time, and there is no need to search and display individually, thereby improving the convenience of the monitoring system.

  According to a second aspect of the invention, in the surveillance camera system according to the first aspect of the invention, the storage means for storing the image, the recording means for recording the image in which the abnormality is detected and the information indicating the abnormality in association with each other, and the recording means are recorded. A selecting unit that selects an arbitrary image from the recorded images, the display unit displays the arbitrary image in the first form, and the image stored by the storage unit of the group to which the arbitrary image belongs It is characterized in that it is displayed in the second form starting from a time that is around a predetermined time from the time of the image.

  According to the second aspect of the invention, since the image in which the alarm has occurred and the image of the other channel of the group to which the group belongs are output in the same form on the same screen for the image once accumulated, it can be confirmed at the same time and searched individually. This eliminates the need for display and improves the convenience of the monitoring system.

  According to a third aspect, in the surveillance camera system of the first aspect or the second aspect, the first form is a still image state at the first position of the display means, and the second form is the first state of the display means. The moving image is in a second position different from the first position.

  According to the third aspect of the invention, the image to be noticed that may have important information is the still state, and the image to be paid attention to is the moving state. Therefore, the moving image is always based on the still state image. Therefore, the convenience of the monitoring system is improved.

  According to a fourth aspect, in the surveillance camera system according to any one of the first to third aspects, the first state is an enlarged display state.

  According to the fourth invention, an image to be noticed that will have important information is displayed in an enlarged state, the image can be seen in detail, and the convenience of the monitoring system is improved. It has the effect.

  FIG. 1 shows a block diagram of a surveillance camera system 10 which is an example of the present embodiment in the reproduction image system of the present invention.

  The surveillance camera system 10 of this embodiment includes 16 surveillance cameras 12a to 12p (channels CAM1 to CAM16), alarm detectors 24a to 24p, video recorder 14, controller 30 and monitor 32 provided in each surveillance camera. Including. The 16 monitoring cameras 12 a to 12 p and the alarm detectors 24 a to 24 p are connected to the video recorder 14, and the video recorder 14 is connected to the controller 30 and the monitor 32.

  The monitoring cameras 12a to 12p are configured to include an imaging lens, an imaging device, and a camera processing circuit (not shown). The video recorder 14 includes a multiplexer 16, a signal processing circuit 18, a memory 20, a hard disk recorder (HDR) 22, an electronic zoom processing circuit 26, a CPU 26, and a display processing circuit 28.

  The 16 monitoring cameras 12a to 12p are installed at different positions, and output the captured image signals V1 to V16 individually. Also, the alarm detectors 24a to 24p detect the movement of the object scene photographed by the monitoring cameras 12a to 12p, respectively, and generate alarm signals A1 to A16 when abnormal movement occurs. The captured image signals V1 to V16 and the alarm signals A1 to A16 are given to the multiplexer 16.

  The multiplexer 16 selects each of the monitoring cameras 12a to 12p by a predetermined number of frames in a time division manner, and extracts the captured image signals V1 to V16 output from the selected monitoring camera at a predetermined period. Then, the extracted captured image signal is subjected to signal processing by the signal processing circuit 18 and is output to the monitor 32 by the display processing circuit 28 or output to the HDR 22 to display and record the captured image signal. In this embodiment, the captured image signals output from the monitoring cameras 12a to 12p by the video recorder 14 are time-divided frame by frame.

  The captured image signals V1 to V16 output from the monitoring cameras 12a to 12p (channels CAM1 to CAM16) are displayed in 16 areas AR1 to AR16 provided on the monitor 32 as shown in FIG. The That is, the captured image signal V1 of the channel CAM1 corresponds to the area AR1. 2 and FIG. 3 to be described later, the numbers on the upper right of each of the 16 areas indicate the area numbers AR * (* is 1 to 16), and V * is a captured image signal from the channel CAM *. It shows that there is. The captured image signals V1 to V16 from the channels CAM1 to CAM16 are time-divided frame by frame and stored in the memory 20.

  Each of the photographed image signals V1 to V16 stored in the memory 20 is output to the HDR 22 when a recording instruction is given by the CPU 26. The compression processing is performed by a compression / expansion processing circuit (not shown here) to obtain compressed data. Each is stored. The recording instruction is mainly given when an alarm occurs. In this case, the compressed data and the alarm information are associated and recorded in the HDR 22.

The captured image signals V1 to V16 stored in the memory 20 are stored in the display processing circuit 28 frame by frame, and the captured image signals V1 to V16 for 16 frames from the channels CAM1 to CAM16 are shown in FIG. Multi-image data arranged in such a normal image display state in the areas AR1 to AR16 is created and output to the monitor 32. Accordingly, the respective images based on the captured image signals V1 to V16 from the channels CAM1 to CAM16 are updated at a cycle of 16 frames.
In addition, the CPU 26 can receive an image layout instruction for each channel image from the controller 30, stores the image layout in the memory 20, and creates multi-image data based on the instruction.

  Further, the operator can realize a state different from the above-described normal image display state by operating the controller 26. That is, by sending an instruction signal to the multiplexer 16, the 16 channels CAM1 to CAM16 are designated as an arbitrary group, a position is designated so that an image is arranged so as to be displayed in an arbitrary area, and Priorities for alarm detection can be specified. In this embodiment, up to 12 channels can be designated as one group. Based on the signal from the controller 30, the CPU 26 records in the memory 20 the recording of which group the channels CAM1 to CAM16 belong to, the image layout, and the priority of each channel CAM1 to CAM16.

  Here, the operation of this embodiment when one of the alarm detectors 24a to 24p is output to the multiplexer 16 will be described with reference to FIG. First, the CPU 26 specifies the channel from which the alarm signal is output. Here, it is assumed that the alarm signal A1 is output and the channel CAM1 is specified. The captured image signal V1 for one frame from the specified channel CAM1 is temporarily stored in the memory 20, and the stored captured image signal V1 is enlarged by the electronic zoom processing circuit 27. The ratio of the enlargement process is a ratio that occupies four areas with respect to a captured image signal that occupies one area.

  For example, the captured image signal V1 displayed in the area AR1 is enlarged by the electronic zoom processing circuit 24 to generate the captured image signals V1a, V1b, V1c, and V1d, and the areas AR6, 7, 10, and 11 are used. And display. The captured image signal V1 before the enlargement process and the captured image signals V1a to V1d after the enlargement process are stored in the display processing circuit 28. The captured image signal V1 temporarily stored in the memory 20 is compressed by a compression / expansion processing circuit (not shown), output to the HDR 22, and recorded in association with alarm information.

  Also, based on the specified channel CAM1, the channel of the group to which the channel belongs is specified. Captured image signals from the specified group of channels are time-divided frame by frame and stored in the memory 20, and the stored captured image signals are stored in the display processing circuit 28. The captured image signal stored in the memory 20 is recorded as compressed data in the HDR 22.

  The captured image signal enlarged by one frame stored in the display processing circuit 28 and the image from a specific group of channels time-divided frame by frame are converted into multi-image data based on the recorded image arrangement. The The update cycle changes depending on the number of channels belonging to the group. For example, when the number of channels belonging to the group is 12, the images of the respective channels CAM1 to CAM12 are updated at a cycle of 12 frames.

  The above-described channel group setting and image arrangement methods are realized by the operator operating the controller 30. Referring to FIG. 3, in this embodiment, channels CAM1, CAM6, CAM7, CAM8, CAM11, CAM12, CAM13, CAM14, CAM15 and CAM16 form one group.

  In this case, 16 image arrangement areas are provided, and 10 monitoring cameras form one group. As for the arrangement of the image when the alarm is generated, the image of one channel in which the alarm is generated is displayed using the four central areas. The remaining two areas display past recorded images of one channel CAM1 in which an alarm has entered. Regarding the display of the recorded image, the latest image of the alarm image of the channel CAM1 recorded so far is displayed. If no alarm image of channel CAM1 is recorded, this area may not be displayed.

  In the following embodiment, the channel in which the alarm is generated by the alarm detector 24a, that is, the channel in which the alarm is generated will be described as channel CAM1. When the alarm signal AR1 from the alarm detector 24a is input to the multiplexer 16, the multiplexer 16 specifies the channel CAM1 based on the alarm signal A1. The captured image signal V1 from the channel CAM1 is displayed using the four central areas as shown in FIG.

  Based on the recorded image arrangement, the captured image signals from the channels CAM1, CAM6, CAM7, CAM8, CAM11, CAM12, CAM13, CAM14, CAM15, and CAM16 are captured one frame at a time, and image arrangement processing is performed. The latest CAM1 alarm occurrence image of the channel CAM1 recorded in the HDR 18 is displayed in the area 14, and then the new CAM1 alarm occurrence image is displayed in the area 15.

  Next, processing when an alarm occurs in the present embodiment will be described with reference to FIGS.

  When monitoring is started by the operator operating the controller 30, the CPU 26 sets the value of a counter N (not shown) in the CPU 26 to 1 (step S1). The value of the counter N indicates the priority order among the channels CAM1 to CAM16. Then, the channel X corresponding to the priority order 1 where the value of the counter N is 1 is detected from the memory in which the priority order is recorded and specified (step S3). An alarm signal from the alarm detector corresponding to the identified channel is detected (step S5).

  Then, it is detected whether or not the alarm signal A is input to the multiplexer 16 (step S7). When the alarm signal is not detected (NO), the captured image signal of the channel X is temporarily stored in the memory 20 and output to the display processing circuit 28 to display the image on the monitor 32 (step S15). Then, it is determined whether or not there is an end operation from the controller 30 (step S17). If there is an end operation (YES), the process ends. If there is no end operation (NO), it is determined whether or not the value of the counter N is 16 (step S19).

  Here, as described above, each alarm signal is detected according to the priority set from among the channels CAM1 to CAM16. When the value of the counter N is 16 (YES), the value of the counter N is set to 0, and the counter N is incremented by 1 (steps S21 and step 23). That is, since all alarm signals of the channels CAM1 to CAM16 have been detected, the value of the counter N is returned to 1, and the process returns to step S3 to detect the channel X corresponding to the first priority. If the value of the counter N is not 16 in step S19 (NO), the value of the counter N is incremented by 1 (step S23) and the process returns to step S3.

  When the alarm signal A is detected in step S7 (YES), a timer (not shown) in the CPU is reset and started (step S9). This timer counts for a predetermined time. This predetermined time is provided for monitoring by the same system for several minutes to several tens of minutes after the alarm signal notifying the abnormality enters the multiplexer 16. It is assumed that this embodiment is sufficiently set. The captured image signal and alarm information of the channel X that detected the alarm signal are output to the HDR 22, and an instruction to record the correlated image signal and the alarm information is issued (step S11).

  The captured image signal of channel X once stored in the memory 20 is converted into an image having a size to be displayed using the areas AR6, 7, 10 and 11 in the electronic zoom processing circuit 27 as shown in FIG. The enlargement process is performed (step S13). Next, the channel of the group to which channel X belongs is searched (step S23). The enlarged captured image signal, the captured image signal of the channel of the group, and the latest captured image signal of channel X recorded in the HDR 22 and the previous captured alarm signal are stored in the display processing circuit 28. Then, an arrangement process for displaying each photographed image signal at a predetermined position is performed and output as one image to the monitor 32 (step S27), the process proceeds to step S17, and the process from step S17 described above is performed.

  In this embodiment, the captured image signal of the channel where the alarm is detected is displayed as it is and the processed image signal is displayed on the same screen, but the enlarged display is displayed. Regarding what is done, the image at the time of alarm occurrence recorded in the HDR 22 may be repeatedly displayed. In that case, a still image may be displayed, or a moving image may be repeatedly displayed for a predetermined time after an alarm is detected.

  In this embodiment, the image of the channel in which the alarm is detected is displayed on the same screen as the image that is displayed in an enlarged manner and the image that is displayed as a standard image. You can omit it.

  In this way, when an alarm occurs, the channel of which image is to be displayed at each position on the display screen is specified, and the channel in which the alarm is detected is a still image or a video of a predetermined time after detecting an alarm. The convenience of the monitoring system can be improved by repeatedly displaying images and displaying images of other channels of the group to which the channel belongs on the same screen.

It is a block diagram which shows the structure which is one Example of this invention. It is an illustration figure which shows an example of the display screen in the simultaneous reproduction | regeneration at the time of the normal time of several channels of FIG. 1 Example of this invention. It is an illustration figure which shows an example of the display screen in the simultaneous reproduction | regeneration at the time of the alarm detection of the multiple channels of FIG. 1 Example of this invention. It is a flowchart which shows a part of example of operation | movement of FIG. 1 Example of this invention. It is a flowchart which shows a part of continuation of FIG. 5 of this invention.

Explanation of symbols

12 ... surveillance camera 14 ... video decoder 24 ... alarm detector 32 ... monitor 30 ... controller

Claims (4)

A plurality of imaging means for acquiring an image of each channel;
Grouping means for arbitrarily grouping the channels;
An abnormality detecting means for detecting an abnormality of each of the channels;
When an abnormality is detected by the abnormality detection means, an image of the channel in which the abnormality is detected is displayed in the first form, and an image of the channel of the group to which the image in which the abnormality is detected belongs is displayed in the second form. A surveillance camera system comprising display means for displaying in a form. Storage means for storing the image;
Recording means for recording the image in which the abnormality is detected and information indicating the abnormality in association with each other;
Further comprising a selection means for selecting an arbitrary image from the recorded images recorded by the recording means,
The display means displays the arbitrary image in a first form, and starts from a time when the image stored by the storage means of the group to which the arbitrary image belongs is about a predetermined time from the time of the arbitrary image. The surveillance camera system according to claim 1, wherein the surveillance camera system is displayed in a second form. The first form is a still image state at the first position of the display means, and the second form is a moving image state at a second position different from the first position of the display means. The surveillance camera system according to claim 1 or 2, wherein The surveillance camera system according to claim 1, wherein the first state is an enlarged display state.