JP2004201231A - Monitoring video camera system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely follow, in partial zoom video, a moving object that is detected out of entire video. <P>SOLUTION: The monitoring video camera system is provided with: a first monitoring camera 10 for photographing the entire video of a wide field of view; a motion detecting means 31 for detecting a moving part out of the entire video data corresponding to the entire video picked up by the first monitoring camera; a coordinate calculating means 32 for calculating the area of the moving part detected by the motion detecting means; and a second monitoring camera 20 to be turned to a moving object corresponding to the moving part for enlarging the moving object to pick up the partial zoom video by controlling the driving of a pan mechanism part 24 and/or tilt mechanism part 25 via a control part 33 on the basis of the calculation result supplied from the coordinate calculating means. The second monitoring camera 20 is mounted through the pan mechanism part 24 and the tilt mechanism part 25 onto a supporting shaft 14 that is provided approximately along the extension of an optical axis K of the first monitoring camera 30 on the rear surface side of the first monitoring camera 10. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a surveillance video camera system used for crime prevention, disaster prevention, safety surveillance, etc., which can simultaneously capture a wide-field whole image and a partially zoomed image obtained by enlarging a moving part in the whole image. Things.
[0002]
[Prior art]
Conventional surveillance cameras are generally installed fixedly to the area to be monitored, and constantly monitor the area to be monitored, but when it is necessary to photograph a wider area, A method in which a plurality of surveillance cameras are fixedly arranged in each direction of an area to be monitored, a method in which a single surveillance camera changes a shooting direction using a pan mechanism and a tilt mechanism, and the like are employed.
[0003]
However, the method of fixedly arranging a plurality of surveillance cameras not only increases the cost of the surveillance video camera system but also necessitates securing an installation place for the plurality of surveillance cameras and complicates wiring. On the other hand, a single surveillance camera equipped with a pan mechanism and a tilt mechanism is advantageous in terms of price and installation because it does not require a number of cameras, but it is not possible to capture peripheral images at once. There are drawbacks.
[0004]
A video camera using a fisheye lens or an aspherical mirror (hyperbolic mirror, parabolic mirror, conical mirror, etc.) is known as a method for capturing a wide field of view at a time. Since the whole image was condensed into one small image sensor, the amount of information was not enough to obtain detailed video information from the image sensor, and a part of the captured image information was enlarged by electronic zoom processing. In this case, an image having a low resolution is obtained, and a satisfactory image cannot be obtained in a surveillance camera application requiring identification of a person.
[0005]
Therefore, there is an automatic tracking monitoring device (= surveillance video camera system) capable of simultaneously capturing a wide-field whole image and a partial zoom image obtained by enlarging a moving part in the whole image (for example, Patent Document 1). reference).
[0006]
[Patent Document 1]
JP-A-6-217316 (page 2-3, FIG. 1)
[0007]
FIG. 8 is a configuration diagram showing a conventional automatic tracking monitoring device.
The conventional automatic tracking monitoring device 100 shown in FIG. 8 is disclosed in the above-mentioned Patent Document 1 (Japanese Patent Laid-Open No. 6-217316), and will be briefly described with reference to Patent Document 1. .
[0008]
As shown in FIG. 8, in the conventional automatic tracking monitoring apparatus 100, a first monitoring camera 110 fixed to an appropriate place by attaching a lens 111 for photographing the whole or a predetermined range of monitoring places, and A zoom lens 121 for enlarging and photographing a part of a range photographed by the first surveillance camera 110 is attached, and the support shaft 112 provided on the lower surface and / or upper surface of the first surveillance camera 110 is vertically and horizontally. At least one second surveillance camera 120 rotatably supported on the first and second surveillance cameras 110 and 120, and automatically photographed by the first and second surveillance cameras 110 and 120. Time-lapse VTR 130 that records and reproduces each video for a long time, displays each video from the first and second monitoring cameras 110 and 120, and It is schematically constituted by a monitor 140 for projecting when reproducing the video recorded by the scan VTR 130.
[0009]
Here, a moving object is detected by a motion detecting means (not shown) from the whole video taken by the lens of the first monitoring camera 110, an area where the moving object is located is determined, and the second monitoring is performed based on the determination result. The moving object is automatically tracked by enlarging and photographing the moving object with the zoom lens 121 of the camera 120.
[0010]
[Problems to be solved by the invention]
By the way, in the conventional automatic tracking monitoring device 100 described above, the first monitoring camera 110 is fixed in a horizontal direction, and the support shaft 112 attached to the lower surface and / or upper surface of the first monitoring camera 110 is Since the second monitoring camera 120 supported by the support shaft 112 is rotatable up and down and left and right as shown in FIG. For example, since the photographing direction of the first surveillance camera 110 can photograph only a wide area centered on the horizontal direction in front, the rear side of the first surveillance camera 110 completely falls within the field of view when photographing with the first surveillance camera 110. Since there is no tracking, tracking by the second monitoring camera 120 is not performed.
[0011]
Therefore, if the first surveillance camera 110 is temporarily fixed downward from the vicinity of the ceiling in the room in the above-described configuration, the first surveillance camera 110 can photograph the entire room in a wide range, but the first surveillance camera 110 Since the second monitoring camera 120 is rotatably supported up and down and left and right on a support shaft 112 attached to the lower surface and / or upper surface of the 110, the second monitoring camera 120 extends 360 ° in the pan direction around the optical axis. Since there is no pan mechanism for rotating the moving body, there is a considerably wide range in which the moving object cannot be reliably tracked from the video taken by the first monitoring camera 110.
[0012]
Therefore, both in the case where the first surveillance camera 110 is fixedly installed in the horizontal direction and in the case where the first surveillance camera 110 is fixedly installed downward from near the ceiling in the room, the first surveillance camera 110 and the second This is a problem because the range in which the surveillance camera 120 can reliably track the moving object in conjunction with the surveillance camera 120 is limited.
[0013]
Further, the conventional automatic tracking monitoring device 100 can output an entire or predetermined range of video captured by the first monitoring camera 110 and a partially zoomed video captured by the second monitoring camera 120, respectively. There is no disclosure of generating a composite video obtained by combining the automatic tracking monitoring device 100, and there is a problem that the usability of the automatic tracking monitoring device 100 is worse.
[0014]
Therefore, a surveillance video camera system that can solve the above-described problems has been desired.
[0015]
[Means for Solving the Problems]
The present invention has been made in view of the above problems, and a first invention is a first surveillance camera that captures a wide-field whole image,
Motion detection means for detecting a moving portion from the whole video data corresponding to the whole video captured by the first monitoring camera;
Coordinate calculation means for calculating the area of the part with the motion detected by the motion detection means,
By controlling the driving of the pan mechanism and / or the tilt mechanism via the control unit based on the calculation result from the coordinate calculation means, the pan mechanism and / or the tilt mechanism are directed to the moving body corresponding to the moving part, and the moving body is enlarged. A second surveillance camera that shoots a partial zoom image
The second surveillance camera is attached to a support shaft provided substantially along the extension of the optical axis of the first surveillance camera on the rear side of the first surveillance camera via the pan mechanism and the tilt mechanism. This is a surveillance video camera system.
[0016]
Further, a second invention is a first surveillance camera that shoots a wide-field whole image,
Motion detection means for detecting a moving portion from the whole video data corresponding to the whole video captured by the first monitoring camera;
Coordinate calculation means for calculating the area of the part with the motion detected by the motion detection means,
By controlling the driving of the pan mechanism and / or the tilt mechanism via the control unit based on the calculation result from the coordinate calculation means, the pan mechanism and / or the tilt mechanism are directed to the moving body corresponding to the moving part, and the moving body is enlarged. A second surveillance camera that captures partial zoom images
A video synthesizing unit that synthesizes the entire video data and the partial zoom video data corresponding to the partial zoom video to generate composite video data;
A video camera system for surveillance, comprising: video selection means for selectively outputting the whole video data, the partial zoom video data, and the composite video data.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a surveillance video camera system according to the present invention will be described in detail with reference to FIGS.
[0018]
FIG. 1 is a configuration diagram showing a surveillance video camera system according to the present invention,
FIG. 2 is a diagram showing a state in which a second monitoring camera is attached to a support shaft provided on a rear surface side of the first monitoring camera via a pan mechanism and a tilt mechanism, and FIG. FIG. 3B shows a case where the second surveillance camera is panned around the attached support shaft, and FIG. 3B is a diagram showing a case where the second surveillance camera is tilted;
FIG. 3 is a schematic diagram of the surveillance video camera system according to the present invention, in which the whole video data corresponding to the whole video taken by the first surveillance camera and the partial zoom video data corresponding to the partial zoom video taken by the second surveillance camera. A diagram showing composite video data synthesized by the video synthesis unit,
FIG. 4 is a block diagram for explaining the operation of a motion detection unit in the surveillance video camera system according to the present invention;
FIG. 5 is a first aspect diagram for explaining the operation of the coordinate calculation unit in the surveillance video camera system according to the present invention;
FIG. 6 is a second aspect diagram for explaining the operation of the coordinate calculation unit in the surveillance video camera system according to the present invention,
FIG. 7 is a flowchart for explaining the overall operation of the surveillance video camera system according to the present invention.
[0019]
As shown in FIG. 1, a surveillance video camera system 1 according to the present invention includes a first surveillance camera 10 for whole video shooting, which is fixedly installed, for example, near a ceiling in a room and can capture a wide field of view at a time. A second surveillance camera 20 for photographing a partly zoomed image that can enlarge and photograph, for example, a moving part from the whole image photographed by the first surveillance camera 10 is provided.
[0020]
The first surveillance camera 10 includes a fisheye lens 11 for photographing a wide-field whole image, an image sensor 12 using a CCD or a CMOS for forming the whole image photographed by the fisheye lens 11, and an image pickup device. First video processing for performing A / D conversion or color matrix conversion, gamma correction, aperture correction, and the like after photoelectrically converting the whole image formed on the element 12 to generate the whole image data 13a corresponding to the above whole image And a unit 13. In place of the fish-eye lens 11 for capturing a wide-field overall image, a wide-angle lens capable of capturing a wide-field image equivalent thereto or an aspherical mirror such as a hyperboloid mirror, a parabolic mirror, or a conical mirror is used. May be.
[0021]
On the other hand, the second surveillance camera 20 described above is a zoom lens that enlarges a moving object corresponding to a moving part in the entire image data 13a corresponding to the entire image captured by the first surveillance camera 10 to capture a partial zoom image. 21, an image pickup device 22 using a CCD or a CMOS for forming a partial zoom image taken by the zoom lens 21, and an A / D conversion after photoelectrically converting the partial zoom image formed on the image pickup device 22 Alternatively, the second video processing unit 23 that performs color matrix conversion, gamma correction, aperture correction, and the like to generate the partial zoom video data 23a corresponding to the above partial zoom video, and rotates the second monitoring camera 20 in the pan direction. It is composed of a pan mechanism 24 and a tilt mechanism 25 for rotating the second monitoring camera 20 in the tilt direction.
[0022]
Here, as shown in an enlarged manner in FIG. 2A, the first monitoring camera 10 is fixedly installed near the ceiling in the room, and the fisheye lens 11 is directed downward, so that a wide field of view in the room is obtained. You can shoot at once. A support shaft 14 extends substantially along the extension of the optical axis K of the first surveillance camera 10 on the rear surface side of the first surveillance camera 10. The second surveillance camera 20 is attached via a mechanism 25. The second monitoring camera 20 is supported by the pan mechanism unit 24 so as to be able to rotate 360 ° in the pan direction of the arrow about the support shaft 14. This makes it possible to reliably follow the moving object when there is a moving object near the outer periphery of a particularly circular fisheye image in the entire video taken by the fisheye lens 11 of the first monitoring camera 10.
[0023]
2B, the second surveillance camera 20 is supported by the support shaft 14 by a tilt mechanism 25 so as to be able to rotate a predetermined angle in the tilt direction of the arrow. At this time, the movement amount on the tilt A side has a driving range that covers at least the entire image. It is desirable that the amount of movement on the tilt B side covers the entire image. However, when the amount of movement is equal to or more than a certain amount, the movement of the tilted side of the partial zoom image captured by the second surveillance camera 20 is increased due to the attachment to the support shaft 14. Since the first surveillance camera 10 enters inside, the movement is limited within a range where the first surveillance camera 10 does not enter the field of view. For this reason, there is a blind spot in the partial zoom image obtained by the second surveillance camera 20, and an image in a range where the blind spot is obtained can be obtained as a sufficiently large image by the fisheye lens 11 of the first surveillance camera 10. It is not a problem because it is possible. In other words, the range in which the support shaft 14 hinders the shooting of a partial zoom image with the zoom lens 21 of the second surveillance camera 20 and is difficult to shoot in the optical axis direction (directly below) of the first surveillance camera 10. However, since this small range is the largest range captured by the fisheye lens 11 of the first surveillance camera 10, this range does not use the image from the zoom lens 21 and the image from the fisheye lens 11 is sufficient. What you get.
[0024]
Accordingly, a second monitoring mechanism is provided via a pan mechanism 24 and a tilt mechanism 25 on a support shaft 14 provided substantially along the extension of the optical axis K of the first monitoring camera 10 on the rear side of the first monitoring camera 10. By attaching the camera 20, when a moving object is detected from the entire video data corresponding to the entire image captured by the first monitoring camera 10, the coordinates of the moving object to be enlarged and captured by the second monitoring camera 20 will be described later. Since the calculation can be set based on the optical axis K of the first surveillance camera 10, the coordinate position of the moving object can be easily calculated. As a result, the second surveillance camera 20 can quickly and reliably follow the moving object while enlarging the moving object. Furthermore, when installing the surveillance video camera system 1 according to the present invention, it can be installed without taking a place.
[0025]
Returning to FIG. 1, the entire video data 13a processed by the first video processing unit 13 in the first monitoring camera 10 is sent to the motion detection unit 31, the video synthesis unit 34, and the video selection unit 35. . On the other hand, the partial zoom video data 23a processed by the second video processing unit 23 in the second monitoring camera 20 is sent to the video synthesis unit 34 and the video selection unit 35.
[0026]
Here, the motion detection unit 31 compares the content of the image memory storing the entire video data 13a of the previous frame with the currently input overall video data 13a, and determines which region in the entire video data 13a has a motion portion. Is detected, and the detected motion part is output to the coordinate calculation unit 32.
[0027]
Next, the coordinate calculation unit 32 calculates the absolute coordinates of the center of the moving part and the angle of view of the moving part based on the moving part detected by the movement detecting unit 31, and calculates the absolute coordinate value of the center of the moving part and the motion. The angle of view value of the part is sent to the control unit 33.
[0028]
Next, the control unit 33 controls the driving of the zoom lens 21 so that the moving object corresponding to the moving part in the entire video data 13a captured by the first monitoring camera 10 can be captured by the second monitoring camera 20 with an appropriate size. At the same time, the second surveillance camera 20 is driven and controlled in the pan direction and / or the tilt direction by the pan mechanism unit 24 and / or the tilt mechanism unit 25 toward the moving body side where the motion has been detected by the motion detection unit 31. I have.
[0029]
Next, in the video synthesizing unit 34, the whole video data 13a processed by the first video processing unit 13 in the first surveillance camera 10 and the motion in the whole video data 13a as shown in FIG. The moving body MV corresponding to the portion is enlarged and photographed by the zoom lens 21 of the second surveillance camera 20, and then combined with the partially zoomed video data 23a processed by the second video processing unit 23 as shown in FIG. The composite video data 34a is generated, and the composite video data 34a is sent to the video selection unit 35. At this time, each size and each combination position of the whole image data 13a and the partial zoom image data 23a in the combined image data 34a may be controlled by an external controller (not shown).
[0030]
Returning to FIG. 1 again, in the video selecting unit 35, the entire video data 13a processed by the first video processing unit 13 in the first monitoring camera 10 and the second video processing unit 23 in the second monitoring camera 20 process At least one of the partially zoomed video data 23a thus synthesized and the synthesized video data 34a synthesized by the video synthesis unit 34 is selected. Thereby, since at least one of the whole video data 13a, the partial zoom video data 23a, and the composite video data 34a can be selected, the usability of the surveillance video camera system 1 is improved.
[0031]
In addition, the image selection unit 35 outputs the entire image data when there is no moving part in the entire image data 13a processed by the first image processing unit 13 with respect to the entire image captured by the fisheye lens 11 of the first monitoring camera 10. 13a. On the other hand, if there is a moving part in the whole video data 13a, the partial zoom image processed by the second video processing unit 23 is applied to the partial zoom video taken by the zoom lens 21 of the second monitoring camera 20. It is also possible to control so as to output the video data 23a, and to output the combined video data 34a of both of them as required by an operation of an external controller (not shown).
[0032]
Then, the video data selected by the video selection unit 35 is recorded in a recording medium such as a magnetic tape (not shown), a magnetic disk (HDD), or an optical disk in the recording / reproducing device 36, or the selected video data is displayed on a monitor display. 37. At this time, the recording / reproducing device 36 adds the date and time when the moving object was photographed to the recording medium and adds the partial zoomed video data 23a or the synthesized video data only when the motion detecting unit 31 detects that there is a moving part in the entire video data 13a. By controlling to record the video data 34a, it is possible to effectively use the recording area of the recording medium. When the recording / reproducing device 36 reproduces the video data recorded on the recording medium, the reproduced video data can be displayed on the monitor display 37.
[0033]
At this time, there are two types of output modes of the first video processing unit 13, the second video processing unit 23, and the video synthesizing unit 34, and one output mode is an analog output such as a standard television signal. Due to the nature, only one type of video data can be sent. That is, it is any one of the combined video data 34a obtained by combining the whole video data 13a and the partial zoom video data 23a, the whole video data 13a, and the partial zoom video data 23a.
[0034]
Another output form of the video synthesizing section 34 is a high-speed digital output. If the recording / reproducing device 36 is a device equipped with an HDD capable of recording video data at twice or more the speed or has a function of compressing a video, only the whole video data 13a or the partial zoom video data 23a can be used. Instead, both the entire video data 13a and the partial zoom video data 23a can be recorded. When both the entire video data 13a and the partial zoom video data 23a are recorded in this way, if they are reproduced as they are, the entire video data 13a and the partial zoom video 23a are alternately reproduced, resulting in a very ugly video. Therefore, before recording in the recording / reproducing device 36, an ID indicating which one of the whole video data 13a and the partial zoom video data 23a is recorded is recorded. In the case of a compression standard such as MPEG, for example, this ID may be stored as data in the user data area. At the time of reproduction by the recording / reproducing device 36, it is possible to control to output either video data according to the ID data.
[0035]
Here, the operation of the motion detection unit 31 will be described in detail with reference to FIG. As shown in FIG. 4, the motion detection unit 31 includes therein an image memory 31A, a difference calculation unit 31B, a binarization processing unit 31C, an isolated point removal unit 31D, a labeling unit 31E, a grouping unit 31F and the re-labeling section 31G are provided in the order described above.
[0036]
In the motion detecting unit 31, first, the whole video data 13a processed by the first video processing unit 13 is sequentially stored in the image memory 31A in frame units, and the whole video data 13a N frames before is calculated by the difference calculation unit. 31B. At this time, the image memory 31A can store the entire video data 13a for N (where N is a natural number of 1 or more) frames, and serves as a delay element for N frame periods. Therefore, when N = 1 is set by an external controller (not shown), the entire video data 13a one frame before the entire video data 13a that changes every moment is sequentially stored in the image memory 31A. When N is set to N, for example, the whole image data 13a without motion is stored in advance in the image memory 31A as a reference image, and which case is adopted may be determined as appropriate.
[0037]
The difference calculation unit 31B calculates the difference between the entire video data 13a of the current frame from the first video processing unit 13 and the entire video data 13a before N frames output from the image memory 31A, and calculates the difference overall video. The data is output to the binarization processing unit 31C.
[0038]
In the above-described binarization processing unit 31C, with respect to the entire difference video data output from the difference calculation unit 31B, 1 is set to a pixel whose absolute value of the difference is larger than a preset threshold, and 0 is set to other pixels. The binarized image data is created, and the binarized image data is output to the isolated point removing unit 31D. That is, the number of pixels whose motion is detected in the binarized image data is 1.
[0039]
In the above-described isolated point removing unit 31D, since the small area area in the binary image data output from the binary processing unit 12C can be regarded as a noise component, the area reduction processing and the area expansion processing are repeated a plurality of times. The small area area is removed, and the area left after the small area area is removed is output to the labeling unit 31E.
[0040]
In the above-described labeling unit 31E, numbers are assigned to the regions left after the small area region is removed by the isolated point removing unit 31D so as to distinguish each region, and are output to the grouping unit 31F.
[0041]
In the above-described grouping unit 31F, regions close to each other are regarded as belonging to the same moving object, and the regions are grouped and output to the re-labeling unit 31G.
[0042]
In the re-labeling unit 31G, each group is numbered and a moving part detected from the entire video data 13a is output to the coordinate calculation unit 32.
[0043]
Next, the operation of the coordinate calculator 32 will be described in detail with reference to FIGS. The coordinate calculation differs depending on the fish-eye lens and mirror used for the projection system of the omnidirectional video imaging unit, but since the basic concept is the same, the equi-distance projection-based fish-eye lens 11 (FIGS. 1 and 2) was used. The case will be described below.
[0044]
As shown in FIG. 5, when the imaging surface of the fisheye lens 11 (FIGS. 1 and 2) of the first monitoring camera 10 is represented by xy coordinates, the center of the fisheye image is the center point O, the horizontal direction is the x axis, Let the vertical direction be the y-axis.
[0045]
As shown in FIG. 6, when the real space is represented by XYZ coordinates, the Z axis is taken as the optical axis K (FIG. 2) of the fisheye lens 11, and the X axis and the Y axis are on the imaging surface of the fisheye lens 11. , The X axis and the Y axis coincide with the x axis and the y axis on the imaging surface. Also, the point at which the point C ′ is projected onto the point C on the imaging surface and the line OC ′ connecting the center point O and the point C ′ of the fisheye image intersects the hemisphere having the radius of the fisheye image is denoted by C ″. I do.
[0046]
Here, the description will be made with reference to FIGS. 5 and 6. First, the distance R that is the farthest from the center point O of the fisheye image to the binarized region belonging to each group on the imaging surface of the fisheye lens 11 is described.₀And the closest distance R₁, And the maximum angle value T of the angle from the reference X axis₀And minimum angle value T₁And ask. Further, the distance from the center point O of the fisheye image to the center of the binarized area is represented by R_cAnd the angle from the X axis to the center of the binarized area is T_cAnd the coordinates of the center of the binarized area on the imaging surface are (x_c, Y_c), The coordinates of the center of the binarized area (x_c, Y_c) Is obtained by the following equations (1) and (2).
[0047]
R_c= (R₀+ R₁) / 2
T_c= (T₀+ T₁) / 2
x_c= R_c× cosT_c          ...... Equation (1)
y_c= R_c× sinT_c          ...... Equation (2)
Further, assuming that the optical axis K of the fisheye lens 11 of the first surveillance camera 10 is directed to the center of the binarized area, the direction can be obtained by the following equation (3). At this time, T_aIs the angle between the x axis and the OC on the xy plane, and S_aIs the angle between the Z axis and OC ′ in real space, and R_fIs the radius of the fisheye image on the shooting plane.
[0048]
T_a= T_c
S_a= R_c/ R_f× π / 2 Equation (3)
In addition, the horizontal and vertical angles of view of the motion area are each set to dT._a, DS_aThen, the horizontal and vertical angles of view dT of the motion area_a, DS_aIs obtained by the following equations (4) and (5).
[0049]
dT_a= Arccos @ sinS_a× sinS_a× (cosT₀× cosT₁) + SinS_a× sinS_a× (sinT₀× sinT₁) + CosS_a× cosS_a｝ ... Equation (4)
dS_a= (R₀-R₁) / R_f× π / 2 ...... Equation (5)
Therefore, the angle of view of the fisheye lens 11 is dT_a, DS_aIt may be set to be slightly larger.
[0050]
At this time, when there are a plurality of groups of motion regions, it is necessary to select a region to be photographed. The selection may be performed by the user, or may be automatically selected based on a rule such as selecting a region having the largest area.
[0051]
Next, the overall operation of the surveillance video camera system 1 according to the present invention will be described with reference to FIGS.
[0052]
When the operation of the surveillance video camera system 1 according to the present invention is started, an entire image is photographed by the fisheye lens 11 of the first surveillance camera 10 in step 1 and processed by the first image processing unit 13 in the first surveillance camera 10. The entire video data 13a thus obtained is sent to the motion detection unit 31.
[0053]
Next, in step 2, it is asked in the motion detecting section 31 whether or not there is a moving part in the whole video data 13 a. If it is determined that there is no moving part in the whole video data 13 a, The whole video data 13a is output via the selection unit 35.
[0054]
Next, when it is determined in step 2 that there is a moving part in the whole video data 13a, in step 3, the area of the moving part in the whole video data 13a is calculated by the coordinate calculation unit 32 to correspond to the moving part. The coordinate position of the moving object is calculated.
[0055]
Next, in step 4, the zoom lens 21 of the second surveillance camera 20 is controlled via the control unit 33 based on the calculation result of the coordinate calculation unit 32 by the drive control of the pan mechanism unit 24 and / or the tilt mechanism unit 25 so that In step 5, the moving object is enlarged to capture a partial zoom image, and the partial zoom image data 23 a processed by the second image processing unit 23 in the second surveillance camera 20 for the partial zoom image is imaged in step 5. The output is performed via the selection unit 35, and the process returns to step 1 to repeat steps 1 to 5 described above.
[0056]
Thus, when a moving object is present in the entire image captured by the first monitoring camera 10, the moving object can be automatically followed by enlarging and capturing the moving object by the second monitoring camera 20.
[0057]
【The invention's effect】
According to the surveillance video camera system according to the present invention described in detail above, according to the first aspect, a first surveillance camera that shoots a wide-view whole image and a corresponding whole image that is shot by the first surveillance camera are provided. Motion detecting means for detecting a moving part from the entire video data, coordinate calculating means for calculating an area of the moving part detected by the motion detecting means, and a calculation result from the coordinate calculating means. A second surveillance camera which is directed to a moving body corresponding to the moving part by controlling the driving of a pan mechanism unit and / or a tilt mechanism unit via a control unit, and enlarges the moving body to capture a partial zoom image. And a second surveillance camera mounted on a support shaft provided substantially along the extension of the optical axis of the first surveillance camera on the rear side of the first surveillance camera via the pan mechanism and the tilt mechanism. As a result, when a moving object is detected from the whole image data corresponding to the entire image captured by the first surveillance camera, the coordinates of the moving object to be enlarged and photographed by the second surveillance camera are calculated by the first surveillance camera. Can be set with reference to the optical axis K, so that the coordinate position of the moving object can be easily calculated, and the second surveillance camera can quickly and reliably follow the moving object while enlarging the moving object. In particular, when, for example, a fish-eye lens is attached to the first surveillance camera, the moving object can be reliably followed when the moving object is located near the outer periphery of a circular fish-eye image in the entire video taken by the fish-eye lens. Furthermore, when installing the surveillance video camera system according to the present invention, it can be installed without taking a place.
[0058]
According to the second aspect, a first surveillance camera that shoots a wide-field whole image and a motion that detects a moving part from the whole image data corresponding to the whole image shot by the first surveillance camera Detecting means; coordinate calculating means for calculating an area of the moving portion detected by the motion detecting means; and a pan mechanism and / or a tilt mechanism via a controller based on a calculation result from the coordinate calculating means. A second surveillance camera that is directed to the moving body side corresponding to the moving part by driving and controlling the part, and enlarges the moving body to capture a partial zoom image, the entire image data, and the partial zoom image. Video synthesizing means for generating synthetic video data by synthesizing the corresponding partial zoom video data, and selecting the whole video data, the partial zoom video data, and the synthetic video data As a result, it is possible to select at least one of the whole video data, the partial zoom video data, and the composite video data, so that the surveillance video camera system can be easily used. .
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a surveillance video camera system according to the present invention.
FIG. 2 is a diagram showing a state where a second surveillance camera is attached to a support shaft provided on the rear side of the first surveillance camera via a pan mechanism and a tilt mechanism, and FIG. FIG. 7B is a diagram illustrating a case where the second surveillance camera is panned around a support shaft attached to the camera, and FIG. 7B is a diagram illustrating a case where the second surveillance camera is tilted.
FIG. 3 is a diagram illustrating an entire video data corresponding to an entire video captured by a first monitoring camera and a partial zoom video data corresponding to a partial zoom video captured by a second monitoring camera in the monitoring video camera system according to the present invention; FIG. 5 is a diagram showing composite video data obtained by combining video in a video synthesis unit.
FIG. 4 is a block diagram for explaining an operation of a motion detection unit in the surveillance video camera system according to the present invention.
FIG. 5 is a first diagram illustrating the operation of a coordinate calculation unit in the surveillance video camera system according to the present invention.
FIG. 6 is a second diagram illustrating the operation of the coordinate calculation unit in the surveillance video camera system according to the present invention.
FIG. 7 is a flowchart for explaining the overall operation of the surveillance video camera system according to the present invention.
FIG. 8 is a configuration diagram showing a conventional automatic tracking monitoring device.
[Explanation of symbols]
1. Surveillance video camera system,
10: First surveillance camera, 11: Fisheye lens, 12: Image sensor,
13: first video processing unit,
20: second surveillance camera, 21: zoom lens, 22: image sensor,
23: second video processing unit, 24: pan mechanism unit, 25: tilt mechanism unit,
31: motion detection unit, 32: coordinate calculation unit, 33: control unit 3, 34: video synthesis unit,
35: video selection unit, 36: recording / reproducing device, 37: monitor display.

Claims (2)

A first surveillance camera that captures a wide field of view,
Motion detection means for detecting a moving portion from the whole video data corresponding to the whole video captured by the first monitoring camera;
Coordinate calculation means for calculating the area of the part with the motion detected by the motion detection means,
By controlling the driving of the pan mechanism and / or the tilt mechanism via the control unit based on the calculation result from the coordinate calculation means, the pan mechanism and / or the tilt mechanism are directed to the moving body corresponding to the moving part, and the moving body is enlarged. A second surveillance camera that shoots a partial zoom image
The second surveillance camera is attached to a support shaft provided substantially along the extension of the optical axis of the first surveillance camera on the rear side of the first surveillance camera via the pan mechanism and the tilt mechanism. Surveillance video camera system. A first surveillance camera that captures a wide field of view,
Motion detection means for detecting a moving portion from the whole video data corresponding to the whole video captured by the first monitoring camera;
Coordinate calculation means for calculating the area of the part with the motion detected by the motion detection means,
By controlling the driving of the pan mechanism and / or the tilt mechanism via the control unit based on the calculation result from the coordinate calculation means, the pan mechanism and / or the tilt mechanism are directed to the moving body corresponding to the moving part, and the moving body is enlarged. A second surveillance camera that captures partial zoom images
A video synthesizing unit that synthesizes the entire video data and the partial zoom video data corresponding to the partial zoom video to generate composite video data;
A video camera system for surveillance, comprising: video selection means for selectively outputting the whole video data, the partial zoom video data, and the composite video data.

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