JP2003078805A - Display device for camera information and display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily grasp the video input characteristic and present situation of each camera. SOLUTION: A camera main body graphic 50 showing the present direction of a camera, a sectoral maximum pan angle graphic 52 showing an angle range where the camera is panned to the maximum, and a sectoral present angle of visibility graphic 54 showing the present photographing range are displayed at the installation position of each camera on a map showing the installation places of cameras of operation objects. If a camera can not be turned, the maximum pan angle graphic 52 is not displayed. The maximum pan angle graphic 52 is a sector of a fixed radius obtained by being expanded to be both sides from a camera installation direction centering on where the camera is installed by 1/2 angle of the maximum pan angle. The present angle of visibility graphic 54 is a sector of a fixed radium obtained by being expanded to both sides from the present camera direction centering on where the camera is installed by 1/2 angle of the present angle of visibility angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera information display device and display method in a camera control system.

[0002]

2. Description of the Related Art A camera control system capable of remotely controlling one or a plurality of cameras is used in a surveillance system, a video conference system, or a video conference system. Cameras are usually capable of external control of pan, tilt and zoom, and those incorporating such functions are already on the market.

When operating a plurality of cameras remotely, it is necessary to indicate to the operator where and in what direction the cameras are arranged. Therefore, for example, in a system in which a plurality of cameras are installed in an office and each camera is remotely controlled by one controller (substantially a computer),
The present applicant has already applied for a patent for a display method for displaying a graphic indicating a camera, that is, a camera icon, at the installation position of each camera by superimposing it on the map of the location. Figure 1
3 shows the display screen proposed there.

In FIG. 13, reference numeral 110 denotes an operation target 1.
Alternatively, it is a map window showing the installation locations of a plurality of cameras, and camera icons 112-1 to 112-112, which are placed on a map such as a seating chart of an office and indicate the placement locations of one or a plurality of cameras arranged in the office. -6 is displayed. The camera icons 112-1 to 112-6 are displayed in almost the same orientation as the orientation of the corresponding camera. Next to the map window 110, a video window 114 for displaying a video from one arbitrarily designated camera is displayed,
Below the video window 114, an operation panel 116 for operating pan, tilt and zoom of the designated camera is displayed. Any camera icon 112-1
By specifying ~ 112-6 with the mouse, one camera represented by the specified camera icon 112-1 to 112-6 can be operated with the operation panel 116, and the output image of the camera can be operated. Is the video window 11
4 is displayed.

[0005]

By adopting such a display system, it becomes possible to visually understand where the camera to be operated is located. For example, pan, tilt and zoom of all cameras. Considering all the controls of, it is not enough.

It is an object of the present invention to further improve the above proposal, and to present a camera information display device in which the characteristics of one or more cameras to be controlled can be easily understood.

The present invention also has a variety of control characteristics.
Another object of the present invention is to provide a display device for camera information that enables easy control of each camera in a situation where a plurality of cameras are remotely controlled.

[0008]

A camera information display device according to the present invention has display means for displaying an output image of a camera and a map in which symbols representing the camera are arranged according to their characteristics. The display means displays, as a symbol of the camera, a graphic indicating the maximum rotatable pan angle of the corresponding camera.

The characteristics of the camera are, for example, that pan, tilt and zoom can be externally controlled, only zoom can be externally controlled, and that external control cannot be performed.
Including two or more.

Further, the display means is characterized in that the figure showing the current imaging viewing angle and the figure showing the maximum rotatable pan angle of the camera are overlapped and displayed.

Further, a camera figure showing the direction in which the corresponding image input means is facing, a figure showing the current image viewing angle, and a figure showing the maximum image input range may be displayed in an overlapping manner.

[0012]

With the above means, the camera orientation, the current image field of view, the maximum pan range, the maximum image input range, etc. are displayed in a visually easy-to-understand manner. This makes it possible to more intuitively understand the performance and the current state of the camera. It can provide an intuitive and easy-to-understand user interface.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a schematic block diagram of an embodiment of the present invention. 10 (10-1, 10-2, 10-3,
...) is a video camera, 12 (12-1, 12-
2, 12-3, ...) are video cameras 10 (10
-1, 10-2, 10-3, ...) Pan, tilt,
According to external control signals such as zoom, focus adjustment and diaphragm,
It is a camera control circuit that directly controls. The control signal line includes, for example, RS-232C, but it is obvious that the control signal line is not limited to this.

Reference numeral 20 denotes a camera operating device comprising a computer system for controlling each video camera 10 by sending a control command to the camera control circuit 12.
2 is a CPU for controlling the whole, 24 is a main memory, 26 is a secondary storage device (for example, a hard disk device), 28 is a bitmap display, and 30 is a mouse as a pointing device.

Reference numeral 32 denotes a camera input selection device which selects one of the plurality of video cameras 10 to be controlled and is under the control of the device 20, and 34 denotes the video input device selected by the camera input selection device 32. A video capture device for capturing the output video signal, 36 is a network interface for connecting the device 20 to a computer network or a communication network, and 38 is a system bus for interconnecting the devices of the CPU 22 to the network interface 36. Is. network·
The interface 36 sends a camera control signal to the camera operation device 20 via the network,
0 can be controlled.

The camera input selection device 32 is a control signal line connected to a plurality of camera control circuits 12 and one of the video outputs.
Select one of them to provide the selected video output to the video capture device 34 and logically connect the selected control signal line to the bus 38. As a format of the video signal, for example, there is a luminance / color difference separation type NTSC signal. The video capture device 34 includes a camera input selection device 32.
Capture the video output selected by. The captured video signal is displayed as a moving image in a predetermined window of the bitmap display 28.

Further, the secondary storage device 26 has a camera 10
Data showing the layout of the camera, a camera information file containing the position information and view information of the camera 10, a camera status table containing the current camera status information, and icon (camera icon) data showing each camera 10. Memorize Details of the camera information file and the camera status table will be described later.

In this embodiment, the camera to be operated is a camera whose pan, tilt and zoom can be externally controlled.
It is assumed that there are three types of cameras that can be externally controlled only for zoom, and cameras that cannot be externally controlled for any of pan, tilt, and zoom. I will decide. Therefore, as the camera control characteristics stored in the secondary storage device 26, at least the rotatable / zoomable, the zoomable, and the uncontrollable are distinguished. Alternatively, controllable ranges may be stored for individual elements (rotation and zoom). When the control is impossible, the upper limit value and the lower limit value of the controllable range may be matched. Each camera control circuit 12 accepts both a rotation command and a zoom command if the connected camera 10 can rotate / zoom, but only a zoom command if the connected camera 10 can zoom. If the connected camera 10 is out of control, neither the rotation command nor the zoom command is accepted. Each camera control circuit 12
Returns an error signal to the device 20 when a command that cannot be accepted is input.

FIG. 2 shows a bitmap display 28.
Is an example of a display screen of. It is assumed that a window display system capable of simultaneously displaying a plurality of windows is operating on the bitmap display 28. In the map window 40, a map showing the seat arrangement of the office is displayed, and on the map, a camera icon 42 showing the arrangement location of the plurality of cameras 10 arranged in the office.
-1 to 42-7 are displayed. Details will be described later,
The camera icons 42-1 to 42-7 are displayed in almost the same direction as the corresponding camera 10, and the panable range and the current viewing angle are also displayed at the same time.

In the video window 44, the output video of one camera 10 selected by the camera input selection device 32 is displayed. On the map window 40, the camera icon corresponding to the selected camera is displayed in a different color from the camera icon corresponding to the unselected camera so that the selected camera 10 can be identified. .

The operation panel 4 is provided below the video window 44.
6 is displayed. The operation panel 46 displays a rotation operation button for pan and tilt, and a slide type button for zoom operation. By operating these buttons, a specified camera can be rotated and zoomed. When the selected camera is zoomable (that is, unrotatable), the rotation operation button is in the inoperable display mode, and when the selected camera is uncontrollable, both the rotation operation button and the zoom operation button are operated. The display mode becomes impossible.

FIG. 3 shows camera icons 42-1 to 42-2.
Figure 7 shows an enlarged view of -7. The camera icon of this embodiment is
A camera body figure 50 showing the current orientation of the camera and a fan-shaped maximum pan angle figure 52 showing the maximum panning angle range.
And a fan-shaped current viewing angle figure 54 indicating the current shooting range. For non-rotatable cameras, the maximum pan angle figure 52
Shows a fan shape with an angle of 0 degree, that is, a straight line, but whether or not to display this is considered to depend solely on the user's preference. Therefore, it is preferable that display / non-display can be selected. These expression colors and patterns should be set so that the maximum pan angle graphic 52 and the current viewing angle graphic 54 can be sufficiently distinguished from each other. The current viewing angle is determined by the focal length of the taking lens.

FIG. 4 shows the structure and data example of the camera information file. As shown in FIG. 4, the camera information file has a camera number that is a unique number for each camera, a camera installation position (X, Y), and a camera installation direction (the center of the camera faces when the pan angle is 0 degrees). Direction), control characteristic (0:
Rotatable / zoomable, 1: zoomable, 2: uncontrollable), maximum viewing angle (viewing angle at zoom magnification 1.0),
It consists of maximum pan angle and maximum zoom magnification.

FIG. 5 shows the structure and data example of the camera status table. As shown in FIG. 5, the camera state table includes a camera number, a current camera direction, and a current zoom magnification. The camera numbers in the camera status table are shown in Figure 4.
This is for linking with the camera information file shown in, and the current camera direction and the current zoom magnification are
Each time the mouse is operated, the corresponding part of the selected camera is updated. Needless to say, the current camera orientation is only valid for cameras with rotation capabilities,
The current zoom factor is only valid for cameras with zoom capabilities.

FIG. 6 is a flow chart showing the operation of this embodiment. First, the map data stored in the secondary storage device 26 is read and displayed in the map window 40 (S1). Next, the camera information file containing the position information and field-of-view information of the arranged cameras and the camera status table containing the current camera status information are read (S2), and shown in FIG. 2 based on these information. As described above, the camera icons 42-1 to 42-7 are drawn at the corresponding positions on the map window 40 (S3). Then, the user waits for a mouse operation (S4).

Any of the camera icons 42-1 to 42-7 on the map window 40 is clicked by clicking the mouse.
If is selected (S5), the selected one camera
The icons 42-1 to 42-7 are changed to the color indicating the selected state (here, red), and the camera number indicated by the camera icon is obtained from the camera information file (S).
6). Here, it is assumed that the camera 10-n is selected.
The CPU 22 sends a camera switching command to the camera input selection device 32 to switch the control signal line and camera output to the camera 10-n (S7). The outputs of the cameras 10-n are the camera input selection device 32 and the video capture device 3.
4 and the bus 38 to the display 28,
The image is displayed in the image window 44.

If the operation panel 46 attached to the video window 44 is operated (S8), a camera control command corresponding to the operation content is transmitted to the camera control circuit 12-n via the camera input selection device 32. (S9). Of course, the user can only input an operation suitable for the control characteristic (rotatable / zoomable, zoomable or uncontrollable) of the currently selected camera 10-n. The camera control circuit 12-n controls the camera 10-n according to the received camera control command. At the same time, the CPU 22 updates the display of the selected camera icon to match the new state.

The operation of displaying the camera icon (S3) and updating it (S10) will be described with reference to FIG. First, the process differs depending on the control characteristic (S21). If the camera is uncontrollable (S21), the current view angle graphic 54 is displayed (S22). The current viewing angle figure 54 to be drawn is
It is a fan shape with a constant radius that spreads by ½ of the maximum viewing angle on both sides from the camera installation direction with the camera installation position as the center. Next, the camera body graphic 50 is displayed with being centered on the camera installation position coordinates and being overlaid on the current viewing angle graphic 54 in the state of facing the camera installation direction (S23). For example, the camera icon for camera number 3 in FIG. 4 is displayed as shown in FIG.

When the camera is zoomable (S21), the current view angle graphic 54 is displayed (S24). The current view angle graphic 54 to be drawn is a fan shape having a constant radius with the camera installation position as the center and spread by ½ of the current view angle on both sides from the camera installation direction. Next, the camera body figure 50
Is centered on the camera installation position coordinates, and is displayed in the state of facing the camera installation direction so as to be superimposed on the current view angle graphic 54 (S25). For example, the camera icon for camera number 4 in FIG. 4 is displayed as shown in FIG. 9 in the current state shown in FIG.

If the camera can rotate and zoom (S2
1) First, the maximum pan angle figure 52 is displayed (S2).
6). The maximum pan angle graphic 52 drawn here is a fan shape with a constant radius that spreads from the camera installation direction to both sides from the camera installation direction by ½ of the maximum pan angle. Next, the current viewing angle figure 54 is displayed on the maximum pan angle figure 52 (S27). Present viewing angle figure 5
Reference numeral 4 denotes a fan shape having a constant radius, which is spread from both sides of the current camera direction by 1/2 of the current viewing angle with the camera installation position as the center. Finally, the camera body graphic 50 is displayed centered on the camera installation position and overlaid on the maximum pan angle graphic 52 and the current viewing angle graphic 54 in a state of facing the camera (S28). For example, the cover weir E icon for the camera number 5 in FIG. 4 is displayed as shown in FIG. 10 in the current state shown in FIG.

The CPU 22 responds to the operation of the operation panel 46.
The camera control circuit 12 via the camera input selection device 32.
The camera control signal supplied to the camera may be the same as the control command system for a normal externally controllable camera. In the present embodiment, for example, when the right arrow button on the operation panel 46 is pressed, the CPU 22 selects a pan control command to the right through the camera input selection device 32, and the camera currently selected. It is supplied to the camera control circuit 12 of P0. At the same time, the CPU 22 updates the current camera direction and the current zoom magnification in the camera state table.

The current viewing angle θc of the camera is obtained from the maximum viewing angle θmax and the current zoom magnification K according to the following equation. That is, θc = arctan (tan θmax / K) In this embodiment, all externally controllable cameras are
At startup, the current camera direction is set to the same value as the camera installation direction and the current zoom magnification is set to 1.0 as the initial values of the camera state table.

The above embodiment can be easily expanded to network. For example, as shown in FIG. 11, a plurality of camera operating devices 60-1, 60-having the same configuration as shown in FIG.
2, ..., 60-M are connected to the network 62.
The network 62 is a local area network LAN or wide area network having sufficient bandwidth to transmit digital moving images and camera control signals captured in each of the devices 60-1 to 60-M by the video capture device 34. It is assumed that the network WAN is used, but it is obvious that the network WAN is not limited thereto.

Each of the camera operation devices 60-1 to 60-M can packetize the video data captured by the respective video capture device 34 through the network interface 36 and output the packetized data to the network 62, and the packetized data. Video data can be received from the network 62. The bitmap display 28 displays the video data captured by the video capture device 34 and the video data from the network 62.
Display the data in the video window. Regarding the camera operation command and the camera switching command, each camera operation device 60-
1 to 60-M are network interfaces 36
Can be sent to and received from the network 62 via. The camera operation command and the camera switching command received from the network 62 are handled in the same manner as the internally generated camera operation command and the camera switching command. Such techniques are well known.

However, in order to be compatible with the network, as shown in FIG. 12, information about the device address item and the map name (ie office name) item is added to each camera. When selecting a camera, it is necessary to select a device address and / or a map name from a menu or the like as necessary and switch the camera operating device and / or the map. In addition,
The item of map name is not limited to network correspondence, but is effective even when the camera is located far away and cannot be represented on one map. That is, it is necessary to switch a plurality of maps so that they can be displayed in the map window 40.
When selecting a camera, a map and / or a camera operating device to which the target camera is connected is selected from a menu or the like, if necessary.

When the camera to be controlled is selected and the camera number is known, the table shown in FIG. 12 is referred to and the device address is obtained from the camera number. When the selected camera cannot be directly controlled, that is, when it is necessary to control it via the network, the camera operation command and the camera switching command are issued via the network. Regarding the camera image display, if a camera operating device that displays a map and inputs a camera operation is A and a camera operating device to which the selected camera is connected is B, when the camera is selected, The device A requests the device B to transmit the camera image, and the device A causes the device A to transmit the video data captured by the device B via the network.

As described above, by expanding the network support, more cameras can be controlled even when the number of inputs of the camera input selection device is limited. Further, when it is desired to control one or a plurality of cameras at distant places, it becomes possible to easily cope with each other bidirectionally.

Although the pan range is displayed as an angle using the maximum pan angle graphic, instead of or in addition to this, the video inputtable range is displayed as a graphic based on the maximum pan angle information and the maximum viewing angle information. You may For example, draw a fan shape with a constant radius that expands from the camera installation position to both sides from the camera installation direction by an angle corresponding to the sum of 1/2 of the maximum pan angle and 1/2 of the maximum viewing angle. Good.
The central angle of this fan-shaped figure indicates the maximum range that can be actually photographed.

[0040]

As can be easily understood from the above description, according to the present invention, the information such as the image inputtable range and the maximum pan angle of each camera is visually displayed. You will be able to understand more intuitively.
That is, an intuitive and easy-to-understand user interface can be provided.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an embodiment of the present invention.

FIG. 2 is an example of a screen of this embodiment.

FIG. 3 is a diagram showing a basic configuration of a camera icon.

FIG. 4 is a structure and data example of a camera information file.

FIG. 5 is a structure and data example of a camera state table.

FIG. 6 is an operation flowchart of this embodiment.

FIG. 7 is a flowchart of a camera icon display process according to a camera control characteristic.

FIG. 8 is a display example 1 of a camera icon.

FIG. 9 is a second display example of the camera icon.

FIG. 10 is a display example 3 of a camera icon.

FIG. 11 is a schematic block diagram of a network configuration.

FIG. 12 is additional information for network correspondence.

FIG. 13 is an example of a screen in a conventional example.

[Explanation of symbols]

10 (10-1, 10-2, 10-3, ...): Video camera 12 (12-1, 12-2, 12-3, ...): Camera control circuit 20: Camera operating device 22 : CPU 24: Main memory 26: Secondary memory 28: Bitmap display 30: Mouse 32: Camera input selection device 34: Video capture device 36: Network interface 38: System bus 40: Map window 42-1 42-7: Camera icon 44: Video window 46: Operation panel 50: Camera body figure 52: Maximum pan angle figure 54: Current viewing angle figure 60-1, 60-2, ..., 60-M: Camera Operation device 62: Network 110: Map windows 112-1 to 112-6: Camera icon 114: Video window 116: Operation panel

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Claims (8)

[Claims] 1. A display unit for displaying an output image of a camera and a map in which symbols representing the camera according to characteristics thereof are arranged, and the display unit corresponds to a symbol of the camera. A camera information display device, which displays a figure showing the maximum range that can be captured by the camera. 2. The camera information display device according to claim 1, wherein the display means displays a figure showing a current imaging viewing angle and a figure showing the maximum image-capturing range in an overlapping manner. . 3. A display means for displaying an output image of the camera and a map in which symbols representing the camera according to characteristics thereof are arranged, and the display means corresponds to the symbol of the camera. A camera information display device, which displays a figure that indicates the maximum rotatable pan angle of the camera. 4. The display device for camera information according to claim 3, wherein the display means displays a figure showing a current imaging viewing angle and a figure showing the maximum pan angle in an overlapping manner. 5. A method for displaying camera information, which displays on a display an output image of a camera and a map on which symbols representing the camera are arranged according to the characteristics of the camera. A method of displaying camera information, characterized by displaying a figure showing the maximum range that can be photographed. 6. The method for displaying camera information according to claim 5, wherein a figure showing the current imaging viewing angle and a figure showing the maximum range that can be photographed are displayed in an overlapping manner. 7. A camera information display method for displaying on a display an output image of a camera and a map on which symbols representing the camera are arranged according to their characteristics. A method for displaying camera information, characterized by displaying a figure showing the maximum pan angle that can be rotated. 8. The method for displaying camera information according to claim 7, wherein a figure showing a current imaging viewing angle and a figure showing the maximum pan angle are displayed in an overlapping manner.