JP2005109725A - Video image monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a video image monitoring system which can display a region to supervise preponderantly at the same time it supervises wide range whole region as a natural moving video in high definition. <P>SOLUTION: The video image monitoring system includes a video image imaging unit 100 having an imaging element of high pixel at an imaging side 1. The video image monitoring system includes a video image selector 140 for outputting simultaneously the entire video image of a wide visual field by an area controller 110, and a smooth partial video image of a motion precisely of a part of the entire video image from the video image imaging unit 100 even when the video image of a wide visual field is imaged, selects any by a video image selector 140, and transmits the video image to a monitor side 3 through a communication network 200. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a monitoring device used for crime prevention, disaster prevention, safety monitoring, etc., and in particular, a wide range of video monitoring and high-definition and smooth motion partial video monitoring can be performed by various devices of a monitor connected to a communication network. The present invention relates to a video surveillance system.

  In a general video surveillance system, an image sensor such as a CCD or a CMOS sensor is used for a video imaging unit, and image data is read according to the capability. Then, video is monitored as an analog video signal at a remote monitoring location through a cable, or remote location video information is transmitted through a communication network as digital data through a communication network.

  At this time, if the transmission bandwidth of the communication network is small, the image data is subjected to data reduction by a data compression method such as MPEG-1, MPEG-2, or JPEG, and transmitted as stream data, so that Video surveillance was conducted at the surveillance location.

  On the other hand, when monitoring a relatively wide video area, a wide-angle lens is used as the lens of the video imaging unit, or the video imaging unit (a camera using a wide-angle fixed camera or a fish-eye lens) is located slightly away from the monitoring area. In general, a wide range is included in the field of view.

  However, imaging a wide range with an imaging device (sensor) having a finite number of pixels means that the number of pixels of the imaging device allocated per unit area of the imaging target is small. When the digital zoom is performed for the purpose of enlarging and displaying a region to be noted, the number of effective pixels is originally small, so that an extremely low-quality image is inevitably produced.

  As a solution to this, there is a method using an image sensor with a high pixel, but the image readout speed of the image sensor with a high pixel is slow, and 30 frames / second of a normal television signal cannot be realized.

  As a result, the monitoring video is a frame-dropped video, which is not desirable for monitoring purposes.

  In other words, in the case of a device that has pan, tilt, and zoom functions in the image capturing unit, it is possible to capture a magnified image while paying attention to a person's doorway and moving parts, but it is also desirable to selectively monitor a wide range of images. It cannot satisfy the request.

  Further, in applications where a place with little motion is monitored, a reference image, a current image, and a current image, as disclosed in Japanese Patent Application Laid-Open No. 2002-232728, “Method for Efficiently Reducing Image Data Obtained by a Remote Image Monitoring System (Patent Document 1)”. There is a method of reducing the code amount by performing wavelet transform on the difference signal. This is very good in that a clear video can be transmitted with a small transmission band, but the same problem as described above occurs in an application for monitoring a wide video area.

  Further, as disclosed in Japanese Patent Laid-Open No. 2000-132673 “Image System: Patent Document 2”, there is a method in which an omnidirectional image is stored in an HDD and a plurality of observers can freely view different monitoring areas.

In this case, it is generally the case that the observer finally sees the image displayed by removing the distortion from the omnidirectional image, and the image quality using the image pickup device having a small number of pixels is extremely deteriorated, and this should be improved. If a high-pixel image sensor is used, the same problem as described above occurs.
JP2002-2322876 JP 2000-132673 A

  As described above, since the conventional video surveillance system uses an image sensor with a small number of pixels, the quality is extremely low when an important part of a wide range of surveillance video (hereinafter referred to as wide-angle video) is enlarged and displayed. was there.

  In addition, when a high-image imaging device is used to improve image quality, the video monitoring system has a problem that the displayed video is dropped and unnatural because the image reading speed is slow.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a video monitoring system capable of monitoring a wide range of an entire area and simultaneously displaying a region desired to be focused on as a high-quality natural moving image.

  The present invention includes a video imaging unit that can capture a wide range of video with high pixels and an image encoding unit that compresses the image data, and transmits the image data to a monitoring center via a communication network. It is a video surveillance system that controls an image readout region of the video imaging unit by control.

The imaging device
A division area obtained by dividing the entire area of the imaging area set in advance and a readout area consisting of partial areas within the entire area are set, and each time a video of a frame from the video imaging unit is input, the readout area is An area controller that sequentially outputs the image data of the divided area, the image data of the partial area, the image data of the partial area, and the image data of the divided area are stored, and the image data of the partial area is stored in the frame. An image storage unit that reads in a time shorter than the readout time and reads the image data of the divided region in the remaining time of the readout time, and video data of the entire region of the image storage unit based on an instruction from the monitoring center An image composition unit that synthesizes video data of a region, and a composite image of the image composition unit or a divided region or a partial region of the image storage unit Select video data, and summarized in that and a video selection unit for transmitting.

  In other words, in accordance with an instruction from a remote location where the supervisor is present, any video is selected and monitored from the three types of video: the overall video (A), a partial video in the overall video, and a composite video obtained by combining the two video images. It is a video surveillance system.

  As described above, according to the present invention, even when a wide-field image is captured using a high-pixel imaging device, the entire wide-field image and a high-definition, smooth motion that is a part of the entire image. Can be obtained at the same time. For this reason, it is possible to provide a high-quality natural moving image while monitoring a wide range of the entire area and simultaneously monitoring the area to be focused.

  Also, by selecting an image quality according to the resolution and the speed of the communication network according to the monitoring side device, it is possible to realize a video monitoring system that does not select the type of communication network or terminal.

  Embodiments of the present invention will be described below with reference to the drawings.

<Embodiment 1>
FIG. 1 is a schematic configuration diagram of a video monitoring system according to the present embodiment. As shown in FIG. 1, the imaging apparatus side 1 includes a video imaging unit 100 (a high-pixel wide-angle fixed camera), a region control unit 110, an image storage unit 120, an image composition unit 130, a video selection unit 140, and an image code. The image forming unit 150 and the network connection unit 160 are provided so that a high-quality wide-angle image and a partial image can be obtained simultaneously.

  The monitoring center side 3 includes a network connection unit 300, an image decoding unit 310, a video display unit 320, a video control unit 330, and the like.

  The monitoring center side 3 and the imaging device side 1 are connected by a communication network 200.

(Configuration on the imaging device side)
The video imaging unit 100 is a part that images a subject with high definition and outputs it as video digital data. The video imaging unit 100 is a lens (wide-angle lens, fisheye lens, etc.) used to capture a relatively wide range of video, and a high-pixel imaging device ( 350,000 pixels or more), and an A / D converter or the like.

  The area control unit 110 controls a video range read by the video imaging unit. For example, as shown in FIG. 2 (a), the video range includes pixel coordinates (FIG. 2 (b) corresponding to the camera image area of the video imaging unit 100 (the whole area is A and the partial areas B and C of interest). ) Is previously stored in the memory 110a. FIG. 2B shows the entire area A shown in FIG. 2A divided into three (A1, A2, A3) and stored in the memory. That is, the readout time for one frame is determined to be 1/30 second, and the partial areas B and C are smaller than the divided areas A1, A2, and A3. The reading ends earlier than the video, and the video in the divided area is read in a longer time than the video of the partial video. That is, since the partial areas B and C are small areas, the time required for reading is shorter than the video frame period, so that the entire image is read in the remaining time.

  The above-described entire area A and partial areas B and C are designated in advance (referred to as an initial setting area) or designated by the monitoring center side 3.

  Each time image data (A1, A2, A3, B, C) is captured from the image capturing unit 100, the image storage unit 120 is a part that stores the image data as a unit in a memory. This is a divided area. There are a buffer for storing the video for the area A1, a video for the area A2, a video for the area A3, a buffer for storing the video for the area B, and a buffer for storing the video for the area C. Then, the image synthesis unit 130 outputs the video of the entire area A (A1, A2, A3) and the video of the partial area B or the video of the partial area C, and the video selection unit 140 outputs Either the entire area A (A1, A2, A3) image, the partial area B image, or the partial area C is output. Further, the configuration of the image storage unit 120 will be described in detail later.

  The image synthesizing unit 130 synthesizes and outputs the video of the partial area B or the video of the partial area C to the video A (A1, A2, A3) of the entire area stored in the image storage unit 120. For example, the video of the partial area B or C read out in 1/30 seconds is combined with the divided area (A1, A2, A3) video of the entire area A and output (also referred to as a composite image).

  The video selection unit 140 is a part that selects a predetermined image from the video data of the image storage unit 120 or the image synthesis unit 130 in accordance with an instruction from the monitoring center side 3, and the entire area A (A1) of the image storage unit 120. , A2, A3), partial area B, or C area, or a composite image of the image composition unit 130 is selected.

  The image encoding unit 150 is a part that encodes an image with a predetermined encoding parameter or an encoding parameter designated by the video control unit 330 on the monitoring center side 3. The encoding method is MPEG or JPEG. There are various standards such as JPEG2000 and Motion JPEG2000, which are international standards, considering the ease of code amount control and the diversity of terminals on the supervisor side.

  The network connection unit 160 transmits the encoded data to the monitoring center side 3 via the communication network 200 using a predetermined communication protocol (Internet).

(Configuration on the monitoring center side)
The video control unit 330 causes the video display unit 320 to display a sub screen (not shown) for selecting an area or display a sub screen for changing a partial area. Then, the setting items of these sub-screens are transmitted to the area control unit 110, the video selection unit 140, and the image composition unit 130 on the imaging device side 1 via the communication network 200.

  In addition, the image decoding unit 310 decodes the video signal obtained by the network connection unit 300 and displays the decoded video signal on the video display unit 320.

(Configuration of image storage unit)
FIG. 3 is a schematic configuration diagram of the image storage unit 120. As shown in FIG. 3, the image storage unit 120 has a plurality of whole divided video storage means 170 (170a) for storing / reading the divided videos A1, A2, A3 obtained by dividing the whole area A in one frame period. , 170b, 170c,...), The B area image storage means 220, the C area image storage means 210, the controller 230 for controlling the timing of writing and reading, and the like. It is possible to simultaneously store the video of the partial area.

  The entire divided video storage unit 170a includes a buffer 240a and a buffer 240b, and the first switching unit 250a inputs the pixel data of the A1 area from the video imaging unit 100, and the first switching unit 250a stores the buffer 240a, for example. Switching for writing and writing pixel data in the A1 area to the writing buffer 240a, the second switching means 250b switches the buffer 240b for reading, and reads the pixel data in the A1 area of the buffer 250. Output. That is, the first operation is to store the A1 pixel data in the buffer 240a and simultaneously read the A1 pixel data from the buffer 240b and then use the buffer 240b for writing and the buffer 240a for reading. By performing the switching means 250a and the second switching means 250b, for example, the video data of A1 is read out in 2/90 seconds.

  The whole divided video storage unit 170b includes a buffer 260a and a buffer 260b. The third switching unit 270a inputs pixel data of the A2 area from the video imaging unit 100, and the third switching unit 270a is, for example, a buffer. 260a is switched for writing, and pixel data in the A2 area is written into the writing buffer 260a. At the same time, the fourth switching means 270b switches the buffer 260b for reading, and the pixel data in the A2 area of the buffer 260b is changed. Read and output. That is, the third operation is such that the A2 pixel data is stored in the buffer 260a, and the A2 pixel data is read from the buffer 260b, and then the buffer 260b is used for writing and the buffer 260a is used for reading. By performing the switching means 270a and the fourth switching means 270b, for example, A2 video data (collection of pixel data) is read out in 2/90 seconds.

  Further, the entire divided video storage unit 170c includes a buffer 280a and a buffer 280b. The fifth switching unit 290a inputs pixel data of the A3 area from the video imaging unit 100, and the fifth switching unit 290a is, for example, a buffer. 280a is switched for writing, and pixel data in the A3 area is written to the writing buffer 280a. At the same time, the sixth switching means 290b switches the buffer 290b for reading, and the pixel data in the A3 area of the buffer 290b is changed. Read and output. That is, the fifth operation is such that the A3 pixel data is stored in the buffer 280a and the A3 pixel data is read from the buffer 280b, and then the buffer 280b is used for writing and the buffer 280a is used for reading. By performing the switching means 290a and the sixth switching means 290b, for example, A3 video data (collection of pixel data) is read out in 2/90 seconds.

  The C partial area video storage unit 210a (not shown for the B area video storage unit) includes a buffer 291a and a buffer 291b, and the pixel data of the C area from the video imaging unit 100 is a first switching unit for the C area. 292a is input, and the first switching means 292a for the C region switches, for example, the buffer 291a for writing, and writes the pixel data of the C region to the writing buffer 291a. The switching means 292b switches the buffer 291b for reading, reads out the pixel data of the C area of the buffer 291b and outputs it. That is, the operation of saving the C pixel data in the buffer 291a and simultaneously reading out the C pixel data from the buffer 291b and then using the buffer 291b for writing and the buffer 291a for reading is performed in the C region. For example, the C video data is read out in 1/90 second by the first switching means 292a for C and the second switching means 292b for the C region. That is, the video of the partial area is read quickly, and the divided videos (A1, A2, A3) are read over a longer time than the video of the partial area.

  The controller 230 receives area reading information (A1, A2, A3, B, C) from the area control unit 110, determines which area is currently being read, and in the case of the A1 area, the entire divided video storage means 170a, In the case of the A2 area, the whole divided video storage means 170b is activated, and in the case of the A3 area, the whole divided video storage means 170c is activated. In the case of the area C, the C partial area video storage unit 210 is activated.

(Description of operation)
The operation of the video surveillance system configured as described above will be described.

  Usually, when a high-pixel type image sensor is used as the image sensor 100, the time required to read out all pixel data exceeds the video frame period (1/30 second) of a TV or the like and is finally obtained. The video does not move naturally, and the video is dropped.

  However, in the monitoring application, it is not necessary that the entire image range to be captured is a smooth image, and in particular, in the monitoring using the conventional time lapse VTR, intermittent images are temporally recorded.

  This time-lapse VTR has a drawback that it often misses an important decisive moment, and there is a demand for recording a smooth image even at a point of interest alone.

  Therefore, it is possible to read out a high-definition video within a video frame period by using a high-pixel type image sensor and reading out only the video of the region of interest.

  However, there is a demand for monitoring not only the attention area but also a wider range of images at the same time. In the case of monitoring by a fixed camera, there is a case where the update does not need to be a video frame period because there is almost no movement except for the attention point. In such a case, the present embodiment is effective.

  That is, as shown in FIG. 4A, when the partial area C is set in the area control unit 110 with respect to the entire area A, as shown in FIG. The area control unit 110 reads out the portion of the video area C from the video imaging unit 100 at time.

  Since this video area C is a considerably smaller area than the entire area A, the time required for reading is shorter than the video frame period. Therefore, as shown in FIG. 4B, it is used for reading out the areas A1, A2, and A3 obtained by dividing the entire video area A by the extra time. Since the entire video area A cannot be read within one frame period, as shown in FIG. 4B, what is A1 (for example, 1/3), A2 (for example, 1/3), A3 (for example, 1/3) Reading is performed in several times, and everything is read out in several frames.

  That is, in the first frame, the video data of the A1 area is read by the whole divided video storage means 170a (for example, 2/90 seconds), and in the second frame, the video data of the A2 area is read by the whole divided video storage means 170b (for example, 2/90 seconds) In the third frame, the video data in the area A3 is read by the whole divided video storage means 170c (for example, 2/90 seconds).

  On the other hand, the C area is read by the C partial area video storage unit 210. Since this video area C is a considerably small area compared to the entire area A, the time required for reading is 1/90 seconds, for example, and the time for reading the entire area and partial area in one frame is 1/30 seconds. You will be satisfied.

  In this way, the partial video C can be read without omission, and the entire video A can be updated to a new image once every several frames although frames are dropped.

  As described above, the partial video C and the whole video A (A1, A2, A3) are read out, stored once in the image storage unit 110, synthesized by the image synthesis unit 130, and encoded by JPEG2000 by the image encoding unit 150. Considering the case, the partial area C is a point of interest, so it can be encoded without reducing the image quality, and the entire area A can be encoded with a lower image quality if necessary because it is a less important part. In addition, since the monitor device may be a terminal having various display resolutions such as a PC, a PDA, or a mobile phone, or there may be various bandwidths of the communication network, the image encoding unit 150 encodes Motion JPEG2000. We will use a progressive function that can control the resolution and image quality.

  FIG. 5 is a sequence diagram for explaining the operation of the present embodiment. First, the imaging apparatus side 1 transmits the entire video (A) acquired by the video imaging unit 100 to the monitoring center side (d1). The entire video is transmitted so that the initial setting area preset by the area setting unit 110 is known. For example, the area B of the image of the area A is an initial setting area having a door and the area C is a shelf.

  Then, the operator of the monitoring center confirms the entire video with the partial area frame displayed on the video display unit 320, and when monitoring is performed in this partial area, an “OK” command is input and transmitted (d2). .

  When “OK” is set in the initial setting area, the area control unit 110 on the imaging apparatus side sets the initial setting area inside (pixel coordinates) and reads out the A area, the B area, and the C area. A read area determination process for informing the image storage unit 120 of the area is performed (d3).

  In addition, the operator of the monitoring center transmits a command notifying that it is the selection of the composite image of the area A (A1, A2, A3) and the area C (d4).

  After these settings, the simultaneous reading process of the area AC video is performed (d13). In the simultaneous reading process of the area AC video, the area control unit 110 causes the video of the initial setting area to be transmitted from the video imaging unit 100, and the image storage unit 120 performs video data of the A1 area by the whole divided video storage unit 170a in the first frame. Is read (for example, 2/90 seconds), the video data of the A2 area is read by the whole divided video storage means 170b in the second frame (for example, 2/90 seconds), and the area A3 is read by the whole divided video storage means 170c in the third frame. Are read (for example, 2/90 seconds).

  Also, every time the first frame, the second frame, and the third frame are output, the C area image data is read by the C partial area image storage means 210 (1/90 seconds), and the C data in the memory 12b is read. The video in the area is updated.

  That is, even when a high-pixel camera is used, the video in the area C, which is the area of interest every 1/30 seconds, is always the latest video data, and the entire video is obtained.

  On the other hand, when the image composition unit 130 is set to combine the whole image A (A1, A2, A3) with the region C, the image of the region C from the whole image of the region A in the memory 120a of the image storage unit 120. The entire video (C area is blank) is removed and switched to the memory 120a, and the image of the area C in which the video of the area C of the memory 120b is superimposed on the blank area of the entire video is performed (d5).

  Next, the video selecting unit 140 selects the video synthesizing unit 130, causes the image encoding unit 150 to encode the composite image (A, C) selected by the video synthesizing unit 130, and causes the network connecting unit 160 to Transmit to the monitoring center side (d6). That is, on the video display unit 320 of the monitoring center, a partial video that switches quickly (in this embodiment, 1/90 seconds) is obtained, and a video of the entire area in 3 frames (6/90 seconds) is displayed.

  When the operator on the monitoring center side selects only the video area B, the video control unit 330 transmits the selection of the video area B to the imaging apparatus via the network connection unit 300 (d7).

  The video selection unit 140 of the imaging apparatus selects the video region B (1/90 seconds in one frame) from the image storage unit 120. A reading process is performed (d8), and the image is encoded by the image encoding unit 150 and transmitted to the monitoring center (d9).

  That is, only the video of the video area B (door) is displayed on the video display unit 320 of the monitoring center.

  It is also possible to change the video areas B and C which are partial areas. In order to make this change, for example, the B area frame and the C area frame of the screen are moved with a mouse or the like.

  The moved partial area is read by the video controller 330 and transmitted to the area controller 110 by the network connection unit 300 (d10).

  The area control unit 110 sets a new partial area in each unit (d11), and transmits this to the monitoring center as an initial setting area (d12).

  Next, the concept of the configuration of the area control unit 110 and the image storage unit 120 will be described with reference to FIG. As shown in FIG. 6, the area control unit 110 includes a memory 110a for storing an initial setting area, an area setting unit 110b, an area reading unit 110c, and the like.

  That is, the area setting unit 110b stores the area for image reading (A1, A2, A3, B, C: coordinates of the image sensor) transmitted from the monitoring center in the memory 110a, and the area reading unit 110c captures an image. Each time the object 100 is photographed by the unit 100, the A1 area, the A2 area, and the A3 area are read in order for each frame.

  The image storage unit 120 includes an entire divided video storage unit 170, partial area video storage units 220 and 230, a controller 230, and the like.

  That is, a video imaging unit 100 that can capture a wide range of video with high pixels, a region control unit 110 that reads out pixel information of the entire region of the imaging region or a partial region in the imaging region, and the entire region read out from the video imaging unit 100 A plurality of image storage units 120 that sequentially and temporarily store the video data of the partial area, an image synthesis unit 130 that synthesizes the image data of the image storage unit, and the video data of the image storage unit 120 and the video data of the image synthesis unit 120 A video selection unit 140 that selects one of them, an image encoding unit 150 that compresses image data from the video selection unit 140, a network connection unit 160 that transmits / receives the compressed video data to / from a communication network, and the like Is provided in the image pickup apparatus side 1 and the monitoring center side 3 includes an image encoding unit 310 that performs decompression of the compressed video data, and a decompression unit. The video display unit 310 and the video control unit 330 for displaying the recorded video data, and in response to an instruction from a remote place where the supervisor is present, an entire video (combining A1, A2, and A3) and a partial video (B , C), and a video monitoring system that selects and monitors an arbitrary video from three types of synthesized video obtained by synthesizing the two videos.

<Embodiment 2>
In addition to the first embodiment, the present embodiment is provided with a motion detection unit having a function of detecting a motion range from a difference between a past whole video and a current whole video and designating a video data reading area from an image sensor. This is a video monitoring system in which the video of the motion area can be monitored without the monitor specifying the area.

  Further, the video monitoring system is provided with a video storage device so that the monitor can display not only real-time video but also video in the video storage device stored in the past.

  Furthermore, an image monitoring system using an omnidirectional viewing angle sensor such as a fisheye lens, a hyperboloidal mirror, a parabolic mirror, and a conical mirror in the image capturing unit 295 so that the entire or a part of an extremely wide imaging region can be displayed. is there.

  Furthermore, an image conversion unit 297 that converts image data of a partial area in the omnidirectional video to image data from which distortion has been removed (coordinate conversion for flattening) is provided, and a video display without distortion can be displayed to the monitor. This is a video surveillance system to be realized.

  FIG. 7 includes a video imaging unit 295, an image conversion unit 297, a motion detection unit 298, a recording device 299, and the like that include a fisheye lens or a parabolic mirror in addition to the basic configuration of FIG.

  However, the motion detection unit 298, the recording device 299, and the image conversion unit 297 need not all be present at the same time, and individual functions may exist individually or in combination.

  The motion detection unit 298 is a part that realizes a moving object detection function that is important for video surveillance. By specifying the motion region by the motion detection unit 298, the regions A, B, and C of the region control unit 110 are automatically updated and automatically monitored.

  The recording device 299 records the encoded video data so that the monitor can view it at any time.

  The image conversion unit 297 is, for example, an image viewed from a plane without distortion as illustrated in FIG. 8B from an image captured by an omnidirectional sensor such as a fisheye lens or a hyperboloidal mirror as illustrated in FIG. In order to obtain image quality, the center coordinates (X, Y) and the angle of view (θ) of the region 500 where image distortion is to be removed are necessary. This area 500 is preset in the area control unit 110.

  By such an image conversion process, the monitor can view the monitor video as a natural video (B in FIG. 8) as seen directly by human eyes.

  That is, when the motion detection unit 298 defines an image of the entire region stored in the image storage unit 120 in the coordinate system shown in FIG. 8 and detects motion in this coordinate system, the coordinates of the detected region are determined, The coordinate frame is set in the area control unit 110 as a new partial area.

  For example, as shown in FIG. 9 (a), the movement detecting unit 298 detects that the person has moved, and the area where the person has moved is determined as shown in FIG. 9 (b). A partial area 501 is set in the area control unit 110 (partial area is updated) (actually, the area is set with a distortion-corrected image as shown in FIG. 9C).

  Therefore, when an intruder is detected, an image tracking the person can be transmitted to the monitoring center side, and the image of the partial area is 1/90 second per frame, so that the action of the person can be accurately notified. become.

1 is a schematic configuration diagram of a video monitoring system according to a first embodiment. FIG. 6 is an explanatory diagram of a divided area and a partial area set in the area control unit according to the first embodiment. 3 is a detailed configuration diagram of an image composition unit according to the first embodiment. FIG. FIG. 6 is an explanatory diagram illustrating reading in one frame according to the first embodiment. It is a sequence diagram explaining the whole operation | movement of this Embodiment. It is a block diagram of the area | region control part of this Embodiment 1, and an image storage part. FIG. 3 is a schematic configuration diagram of a video monitoring system according to a second embodiment. It is explanatory drawing explaining the concept of the video monitoring system of Embodiment 2. FIG. FIG. 10 is an explanatory diagram for explaining the update of a partial region by motion detection according to the second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image pick-up apparatus side 100 Image | video imaging part 110 Area | region control part 120 Image memory | storage part 130 Image composition part 140 Image | video selection part 150 Image encoding part 320 Image | video display part 330 Image | video control part

Claims (2)

A video imaging unit that can capture a wide range of video with high pixels, and an image encoding unit that compresses the image data are provided in the imaging device, transmitted to a monitoring center via a communication network, and controlled by the monitoring side A video surveillance system for controlling an image readout area of an imaging unit,
The imaging device
A division area obtained by dividing the entire area of the imaging area set in advance and a readout area consisting of partial areas within the entire area are set, and each time a video of a frame from the video imaging unit is input, the readout area is An area controller for sequentially outputting the image data of the divided areas and the image data of the partial areas;
Store the image data of the partial area, the image data of the divided area,
An image storage unit that reads the image data of the partial area in a time shorter than the readout time of the frame, and reads the image data of the divided area in the remaining time of the readout time;
An image synthesis unit that synthesizes video data of the entire area of the image storage unit and video data of the partial area based on an instruction from the monitoring center;
A video selection unit that selects and transmits video data of either a composite image of the image synthesis unit or a divided region or a partial region of the image storage unit;
A video surveillance system comprising: The video imaging unit has a camera capable of photographing the surroundings at once,
An image conversion unit for correcting distortion of the video data from the camera into a plane;
When the video data from the image conversion unit is input and motion is detected in the video data, the region is obtained, and the motion detection unit newly sets the region as the partial region in the region control unit The video surveillance system according to claim 1.

Images