JP2010141429A - Monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a monitoring system for easily recognizing a feature of a figure within a photographed video image even when the periphery of a house is photographed with a slave unit with a camera for the video image. <P>SOLUTION: The monitoring system includes: the slave unit with the camera (comprising a camera slave unit 2 and an intercom slave unit 3 with a camera) provided with a photographing means; and an intercom master unit 1 for displaying the video image photographed by the slave unit with the camera on a display part 12. When switched to a still image mode according to the operation of a display mode changeover switch 16 while displaying a moving image photographed by the camera slave unit 2 or the intercom slave unit 3 with the camera on the display part 12, the intercom master unit 1 continuously displays the video image photographed by the camera slave unit 2 or the intercom slave unit 3 with the camera when it is switched at the display part 12 (display means) of the intercom master unit 1 as a still image. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a monitoring system having a function of displaying an image from a camera unit attached outside a home.

  As such a monitoring system, a door phone system equipped with a camera door unit and a camera unit can be used for the convenience of checking the face of a visitor (outpatient) and recording the face of a visitor when absent. Has become widespread.

As this type of doorphone system, for example, a doorphone system such as that disclosed in Patent Document 1 is conceived. A doorphone main unit installed in a house, a doorphone with a camera installed at a front door, etc. By connecting to the installed surveillance camera and displaying the video taken by the doorphone with camera and surveillance camera on the doorphone master unit, you can check the face of the visitor and the surrounding situation of the house It is like that.
JP 2003-250151 A

  However, in the above-described door phone system, when monitoring a video of a visitor photographed by a camera-equipped doorphone slave, the subject visitor is generally stationary, and the camera and doorphone slave camera visit The face of the visitor is easy to identify because the distance to the visitor is close, but when monitoring images of the surroundings of the house with a door phone with a camera or a surveillance camera, even if it is a visitor or an intruder Even if a person is photographed, the distance between the camera and the person is long, and the person is often moving. Therefore, there is a problem that it is difficult to capture features such as the face and body shape of the person.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide a monitoring system in which the characteristics of a person in a captured video can be easily understood.

In order to achieve the above object, according to the first aspect of the present invention, there is provided a camera slave unit provided with an imaging unit and installed outdoors, and a video display unit for displaying an image photographed by the camera slave unit. The video display means has either a moving image mode for displaying a moving image captured by a camera slave unit or a still image mode for displaying a still image. When the display mode switching means for switching between the two is provided in the master unit and the display mode switching means switches to the still image mode, the video display means continues to display the video captured by the camera slave unit at the time of switching as a still image. Features.

According to a second aspect of the present invention, in the first aspect of the present invention, the master unit has an enlarged area designating unit for designating an enlarged display area in a still image in the still image mode, and the enlargement designated by the enlarged area designating unit A still image of the display area is enlarged and displayed on the video display means.

  In the invention of claim 3, in the invention of claim 1 or 2, the slave unit with a camera generates a still image to be displayed on the video display means of the master unit in the still picture mode, and the still picture is displayed as the master unit. It is characterized by being output to.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the camera-attached device has a moving body detecting means for detecting a position of a moving body existing in the video, In the still image mode, the position detected by the moving body detection means is enlarged and displayed on the video display means.

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, in the base image, in the still image mode, the position display indicating the position of the moving body detected by the moving body detecting means is superimposed on the still image and the video display means. When an enlarged display operation is performed using the operation means provided in the master unit, a still image enlarged centering on the position display is displayed on the video display means.

  According to a sixth aspect of the present invention, in the fourth aspect of the present invention, when the master unit is in the still image mode, the position display indicating the position of the moving body detected by the moving body detecting means is superimposed on the still image and the video display means. If the operation for canceling the enlarged display is not performed using the operation means provided on the master unit until a certain time has elapsed after the position display is displayed, the position display is enlarged. Still images are displayed on video display means.

  According to a seventh aspect of the present invention, in the first aspect of the present invention, the video display means of the parent device performs PinP (Picture in Picture) display in the still image mode and displays a still image on the parent screen. At the same time, the sub-screen displays the current moving image taken by the sub unit with the camera.

  According to the first aspect of the present invention, when switching to the still image mode, still images captured by the camera slave unit are continuously displayed on the image display means when the display mode is switched. It is possible to provide a monitoring system that can be confirmed and that makes it easy to understand the characteristics of a person even if the person is moving.

  According to the second aspect of the present invention, since the enlarged display area designated by the user using the enlarged area designating unit is displayed in an enlarged manner, even if the distance between the person and the child unit with the camera is far, Features are easy to understand.

  According to the invention of claim 3, since the still image is created on the camera-equipped child device side, processing on the parent device side can be reduced. In addition, by creating a still image with a magnified area on the camera unit and outputting it to the main unit when performing magnified display, the still image has a resolution that matches the display screen without increasing the video transmission bandwidth. Can be displayed, making it easier to capture the characteristics of the person.

  According to the invention of claim 4, since the moving body detected by the moving body detecting means is automatically enlarged and displayed on the video display means, it is a person who is moving at a position far from the slave unit with the camera. Can be easily recognized, and it is not necessary to designate an enlarged area, so that the usability is improved.

  According to the fifth aspect of the present invention, when the user wants to enlarge the user by looking at the position display of the moving object displayed in the still image, the enlarged display can be performed using the operation means. Therefore, it is possible to prevent a still image obtained by enlarging an erroneous part from being automatically displayed and losing an image of a necessary part.

  According to the sixth aspect of the present invention, if the user performs a canceling operation using the operating means, the enlarged display is not performed, so that the still image in which the erroneous part is enlarged is automatically displayed and the necessary part is displayed. It can prevent the video from disappearing. In addition, when the moving object is correctly detected, since the enlarged display is performed after a predetermined time unless the user performs a cancel operation, the usability is improved.

  According to the seventh aspect of the present invention, it is possible to provide a monitoring system that can grasp a situation outside the house and a person's action that cannot be recognized only by a still image by displaying a moving image together with the still image.

(Embodiment 1)
The door phone system which employ | adopted the monitoring system concerning this Embodiment is demonstrated based on FIGS. FIG. 1 is a block diagram showing a door phone system according to the present embodiment, FIG. 2 is a schematic diagram showing the front face of the door phone master unit of the door phone system, and FIG. 3 is a diagram showing a user using the door phone master unit. It is a sequence diagram which shows the process at the time of having performed.

  The door phone system according to the present embodiment is installed outside the house, for example, the camera slave unit 2 (2a, 2b) that captures the image of the surroundings of the house, and can be communicated by voice with the door phone master unit 1 installed at the entrance. The camera includes a doorphone unit with camera 3 and a doorphone base unit 1 that is disposed in a house and displays a picture taken by the camera unit 2 and the doorphone unit with camera 3. In the present embodiment, two camera slave units and one camera-equipped door phone slave unit are connected to the door phone master unit 1, but the camera slave unit that can be connected to the door phone master unit 1 is shown. It does not limit the number of camera units 2a and 2b and door phone unit 3 and does not limit the types of units that can be connected.

  As shown in FIG. 1, the camera unit 2 (2a, 2b) receives, for example, an image pickup unit 21 made of an image pickup device such as a CCD (Charge Coupled Device) and a video signal for one screen input from the image pickup unit 21. The video processing unit 22 that records the video signal captured from the image capturing unit 21 or the recording unit 23 to the transmission unit 24, the recording unit 23 that stores the video signal by the video processing unit 22, and the signal line A transmission unit 24 that is connected to the doorphone master unit 1 via L1 and exchanges communication signals with the doorphone master unit 1, and a control that outputs a control signal to the video processing unit 22 according to a control command input from the transmission unit 24 And a command processing unit 25.

  The imaging unit 21 includes a conversion circuit that digitally converts the output from the imaging element to generate video data. For example, the conversion circuit digitally converts an image input to the imaging element via a lens such as a wide-angle lens. To the video processing unit 22. Note that a CMOS solid-state image sensor may be used as the image sensor.

  As a video output mode of the video processing unit 22, a pause mode in which video output is not performed, a moving image output mode in which a video signal input from the imaging unit 21 is output to the transmission unit 24, and 1 recorded in the recording unit 23 A still image output mode for outputting a video signal for a screen to the transmission unit 24, and the video output mode is changed according to a control signal from the control command processing unit 25.

  When the mode is switched to the moving image output mode in accordance with the control signal, the video processing unit 22 causes the recording unit 23 to record the video signal for one screen input from the imaging unit 21 and the resolution that the doorphone master unit 1 can display. The video signal enlarged or reduced in size is modulated and output to the transmission unit 24.

  In addition, when the mode is switched to the still image output mode according to the control signal, the video processing unit 22 takes out the video signal last recorded in the recording unit 23 from the recording unit 23 in the moving image output mode, and the doorphone master unit 1 displays the video signal. The signal is enlarged or reduced to a possible resolution, further modulated, and output to the transmission unit 24. At this time, when a control signal for enlarging a part of the video is input from the control command processing unit 25, the intercom base unit 1 displays a part corresponding to the position information indicating the position in the still image included in the control signal. The image is enlarged or reduced to a displayable resolution, further compressed and modulated, and output to the transmission unit 24.

  Here, when the video processing unit 22 enlarges or reduces the video signal, for example, if correction is performed using the bicubic method or the like, the resolution that can be captured by the imaging unit 21 and the doorphone master unit 1 can be displayed. Even when the resolution is different, it is possible to display an image in which the user can easily recognize a person or object in the image.

  The transmission unit 24 is connected to the intercom base unit 1 via the transmission line L1, and multiplexes video signals and control commands input from the video processing unit 22 by a method such as frequency multiplexing, and transmits the signal via the signal line L1. To the doorphone master unit 1. In addition, the voice signal and the control command are separated from the communication signal multiplexed by the method such as frequency multiplexing from the doorphone master unit 1 and input via the transmission line L1, and the control command is output to the control command processing unit 25. . Here, since a plurality of slave units are connected to the doorphone master unit 1 and a time division multiplex transmission method is employed to avoid collision of communication signals, the transmission unit 24 is controlled from the doorphone master unit 1. Communication signals are exchanged in time slots assigned in advance by signals. Note that, for example, a speaker and a sound demodulating unit may be provided in the camera slave unit 2 so that a sound signal separated from the communication signal is demodulated and sound is output from the speaker.

  The control command processing unit 25 enlarges and outputs a control signal for changing the video output mode of the video processing unit 22 and a part of the still image output by the video processing unit 22 based on the control command input from the transmission unit 24. The control signal for making it output is output to the video processing unit 22.

  Next, the doorphone master unit 1 will be described.

  The intercom base unit 1 includes a transmission unit 13 that exchanges communication signals with the camera slave unit 2, and a video processing unit 11 that demodulates a video signal input via the transmission unit 13 and outputs the demodulated signal to the display unit 12. A display unit 12 that displays a still image or a moving image according to a video signal from the video processing unit 11, an operation unit 15 that performs an operation of changing the display content of the display unit 12, and an operation from the operation unit 15 And a control command processing unit 14 that outputs a control command for controlling the camera slave unit 2 to the transmission unit 13 according to the signal.

  As shown in FIG. 2, the display unit 12 is attached so that its display screen is exposed on the front surface of the doorphone master unit 1, and is composed of, for example, an active matrix liquid crystal panel using TFT (thin film transistor) elements. A video is displayed according to a signal from the video processing unit 11. Here, the video processing unit 11 and the display unit 12 constitute video display means.

  A plurality of operation switches 17 (17 a to 17 e) are juxtaposed along the lower side of the display unit 12 on the lower front side of the door phone base unit 1. Further, on the surface of the doorphone master unit 1, a camera slave unit call switch 18 for switching start / stop of the camera slave unit 2 according to the user's operation, and a display mode of the video processing unit 11 according to the user's operation. And a display mode changeover switch 16 which is a display mode changeover means for switching between.

  Each switch (display mode change switch 16, operation switch 17, camera slave call switch 18) constitutes an operation unit 15, and the operation unit 15 is operated by the user by operating each switch. A control command is output to the transmission unit 14 and an OSD control signal is output to the video processing unit 11 in accordance with the display mode.

  A plurality of slave units with cameras (camera slave units 2a and 2b and camera-equipped door phone slave unit 3) are connected to the transmission unit 13 via signal lines L1 to L3, respectively. Time-division multiplex transmission is used for communication with each camera slave unit. Each camera slave unit is assigned a time slot in advance and communicates with each camera slave unit using the assigned time slot. Send and receive signals. Since the time division multiplex transmission system is a known technique, description thereof is omitted.

  Further, the transmission unit 13 separates the control command, the audio signal, and the video signal from the communication signal output from each camera slave unit input via each signal line L. The transmission unit 13 outputs the control command separated from the communication signal to the control command processing unit 14 and outputs the video signal to the video processing unit 11. The audio signal separated from the communication signal is output to the audio processing unit (not shown) of the doorphone master unit 1 by the transmission unit 13, and the audio processing unit demodulates the audio signal so that the speaker ( Sound is output from (not shown).

  The transmission unit 13 multiplexes the control command from the control command processing unit 14 and the audio signal from the audio processing unit by a method such as frequency multiplexing, and transmits it as a communication signal to the destination camera unit via the signal line L. Output.

  The control command processing unit 14 outputs, for example, a control command for switching the video output mode of the camera slave unit 2 to the moving image output mode to the transmission unit 13 according to the operation signal input from the operation unit 15, or the display unit 12. Generates an OSD control signal for OSD (On Screen Display) display, and outputs the OSD control signal to the video processing unit 11.

  The video processing unit 11 has a still image mode in which a still image is displayed on the display unit 12 and a moving image mode in which a moving image is displayed on the display unit 12 as display modes of video displayed on the display unit 12. The display mode is switched according to the control signal input from the command processing unit 14.

  When switched to the moving image mode according to the control signal, the video processing unit 11 demodulates the video signal from the camera slave unit 2 input via the transmission unit 13 and converts it to a video signal that can be displayed on the display unit 12. After that, the image is output to the display unit 12 and the moving image is displayed on the display unit 12.

  When the still image mode is switched according to the control signal, the video processing unit 11 demodulates the video signal for one screen transmitted from the camera slave unit 2 and converts it into a video signal that can be displayed on the display unit 12. To do. Also, OSD display data is generated based on the OSD control signal from the control command processing unit 14, superimposed on the video signal and output to the display unit 12, and the still image displayed on the OSD is displayed on the display unit 12. .

  Here, as the OSD display data, a graphic or a character such as “←” or “enlarge” is displayed in the vicinity of the operation switches 17 a to 17 e below the display unit 12 and the operation switches 17 are operated. There are an operation display 32 (32a to 32e) indicating the contents and an enlarged area frame display 31 indicating an area to be enlarged and displayed in the still image (see FIGS. 2A and 2B). In these OSD displays, the display position of the enlarged area frame display 31 is changed in accordance with the OSD control signal from the control command processing unit 14, and the figures and characters displayed on the operation displays 32 (32a to 32e) are displayed. Be changed.

  Here, the operation of the doorphone master unit 1 and the camera slave unit 2 will be described based on the sequence diagrams shown in FIGS. 3 to 5 with respect to a method in which the user confirms the image of the camera slave unit 2 with the doorphone master unit 1. .

  In the initial state of the doorphone master unit 1 and the camera slave unit 2, the video output mode of the video processing unit 22 of the camera slave unit 2 is the pause mode, and no video is displayed on the display unit 12 of the doorphone master unit 1. .

  First, the operation of the doorphone master unit 1 in the moving image mode will be described with reference to FIG.

  When the user operates the camera slave unit call switch 18 which is the operation unit 15 of the doorphone master unit 1, an operation signal is input to the control command processing unit 14 (step S1). The control command processing unit 14 generates a control command C1 for starting the camera slave unit 2 based on the input operation signal, outputs the control command C1 to the transmission unit 13 (step S2), and displays the display unit via the video processing unit 11. 12 is turned on (step S3). The transmission unit 13 multiplexes the control command C1 by frequency multiplexing to generate a communication signal, and outputs the communication signal to the transmission unit 24 of the camera unit 2 via the signal line L1 (step S4).

  The transmission unit 24 of the camera slave unit 2 extracts the control command C1 from the input communication signal (step S5), and outputs it to the control command processing unit 25 (step S6). The control command processing unit 25 outputs a control signal for changing the video processing unit 22 to the moving image output mode (step S7), and switches the video output mode of the video processing unit 22 from the pause mode to the moving image output mode.

  Thereafter, when the video signal captured by the imaging unit 21 of the camera unit 2 is output to the video processing unit 22, the video processing unit 22 causes the recording unit 23 to record the video signal (step S8), and at the resolution of the display unit 12. In addition, an enlarged / reduced video is created (step S9), and after the video signal is modulated, the video signal is output to the transmission unit 24 (step S10). The transmission unit 24 generates a communication signal by multiplexing the video signal by frequency multiplexing, and outputs the communication signal to the transmission unit 13 of the intercom base unit 1 through the signal line L1 (step S11).

  The transmission unit 13 of the door phone base unit 1 extracts a video signal from the input communication signal and outputs the video signal to the video processing unit 11 (step S12). The video processing unit 11 demodulates the input video signal and displays it on the display unit 12 (step S13). In this way, the video imaged by the imaging unit 21 of the camera unit 2 is displayed on the display unit 12 of the doorphone master unit 1.

  And step S8-step S13 are repeatedly performed by a predetermined time interval, and the image imaged by the imaging unit 21 of the camera slave unit 2 is continuously displayed on the display unit 12 of the doorphone master unit 1. A moving image can be displayed on the display unit 12. Here, the video processing unit 22 can reduce the data amount of the video signal to be output by using the video signal output in step S10 as difference information from the video signal output immediately before.

  Next, processing when the doorphone master unit 1 is in the still image mode will be described with reference to FIG.

  When the user operates the display mode changeover switch 16 of the doorphone master unit 1 to select the still image mode (step S14), an operation signal is input from the operation unit 15 to the control command processing unit 14 (step S15).

  The control command processing unit 14 outputs an OSD control signal for causing the video processing unit 11 to perform OSD display of the display unit 12 (step S16), and also receives a control command C2 including a command for causing the camera slave unit 2 to output a still image. And output to the transmission unit 13 (step S17). Here, in the OSD control signal, “←”, “→”, “↑”, “↓”, and “enlarged” are displayed on each operation display 32 (32a to 32e), and the enlarged area frame display 31 is displayed as an initial position, for example. Information to be displayed on the upper left side of the unit 12 is included (see FIG. 2B).

  Next, the transmission unit 13 frequency-multiplexes the control command C2 input from the control command processing unit 14 and outputs it to the transmission unit 24 of the camera slave unit 2 (step S18). The control command C2 is extracted from the communication signal and output to the control command processing unit 25 (step S19). The control command processing unit 25 outputs a control signal for changing the video output mode of the video processing unit 22 to the still image output mode (step S20).

As a result, the video processing unit 22 is changed to the still image output mode, and the video processing unit 22 takes out the video signal for one screen recorded in the recording unit 23 to obtain the resolution of the display unit 12 of the doorphone slave unit 1. After enlarging / reducing (step S21) and performing further modulation, a video signal is output to the transmission unit 24 (step S22). The transmission unit 24 multiplexes the video signal by frequency multiplexing and outputs the multiplexed video signal to the transmission unit 13 of the intercom base unit 1 via the signal line L1 (step S23).
The transmission unit 13 of the door phone base unit 1 extracts a video signal from the input communication signal and outputs the video signal to the video processing unit 11 (step S24). The video processing unit 11 demodulates the input video signal and generates OSD display data from the OSD control signal input in step S16 (step S25). Further, the video processing unit 11 superimposes OSD display data on the demodulated video signal (step S26), and outputs it to the display unit 12 (step S27). In this way, the display unit 12 continuously displays the images taken by the camera unit 2 immediately before shifting to the still image mode, and displays the enlarged area frame display 31 and the operation displays 32. . At this time, the operation switches 17a to 17e correspond to “←”, “→”, “↑”, “↓”, and “enlarge” of the operation displays 32, respectively.

  Next, the operation when the user operates the operation switch 17 will be described with reference to FIG. 5, taking the operation switches 17b and 17e as an example.

  When the user operates the operation switch 17b (corresponding to the operation display 32b “→”), the operation unit 15 outputs an operation signal for moving the enlarged area frame display 31 in the right direction to the control command processing unit 14 (step S28). . The control command processing unit 14 outputs an OSD control signal obtained by moving the enlarged region frame display 31 to the right by a predetermined amount to the video processing unit 11 (step S29), and the video processing unit 11 generates OSD display data from the OSD control signal. Then, by superimposing the video signal input from the transmission unit 13 and outputting it to the display unit 12 (step S30), the enlarged area frame display 31 displayed on the display unit 12 is moved by a predetermined amount to the right. The When the operation switches 17a, 17c, and 17d are operated, the same processing is performed, and the enlarged area frame display 31 is moved and displayed in the left direction, the upward direction, and the downward direction, respectively.

  When the user operates the operation switch 17e (corresponding to the operation display 32e “enlarge”), the operation unit 15 outputs a control signal for enlarging the still image to the control command processing unit 14 (step S31). The control command processing unit 14 outputs an OSD control signal from which the enlarged area frame display 31 is removed to the video processing unit 11 (step S32), and includes a control command C3 including a command for causing the camera unit 2 to output an enlarged still image. Is output to the transmission unit 13 (step S33). The control command C3 is output to the control command processing unit 25 of the camera slave unit 2 in the same manner as steps S18 and S19 (steps S34 and S35). Next, the control command processing unit 25 outputs a control signal for enlarging the enlargement area included in the control command C3 in the still image to the video processing unit 22 (step S36).

  Thereby, the video processing unit 22 of the camera sub unit 2 takes out the video signal for one screen recorded in the recording unit 23, and the display unit 12 of the door phone sub unit 1 has the enlarged area specified in step S36. A video signal enlarged / reduced in resolution is generated (step S37). Here, the video signal is processed in the same manner as in steps S22 to S27, and is output to the display unit 12 of the doorphone master unit 1 (steps S38 to S43).

  In this way, a still image can be displayed according to a user's operation, and an arbitrary place in the still image can be enlarged and displayed, so that the distance between the person and the camera unit 2 can be increased. Even when the person is far away and the person is moving, a door phone system in which the characteristics of the person can be easily understood can be provided.

  Further, since the image is enlarged / reduced in accordance with the resolution of the display unit 12 of the doorphone master unit 1 on the camera slave unit 2 side, the transmission band between the doorphone master unit 1 and the camera slave unit 2 is increased. In addition, it is possible to display an image in which the features of the person in the image can be easily understood.

  As shown in FIG. 2C, in the still image mode, the display unit 12 has a still image based on the video signal for one screen recorded in the recording unit 23 of the camera slave unit 2 as described above. The PinP display 34 may be performed using the image as a parent screen and a moving image based on the video signal from the imaging unit 21 of the camera slave unit 2 as a child screen. It becomes possible to grasp the situation outside the house and the movement of the person after switching to the still image mode.

(Embodiment 2)
As shown in FIG. 6, the camera slave unit 2 includes a moving body detection unit 26 that detects a moving body and outputs a control command including coordinate information of the moving body to the control command processing unit 25. Further, the video processing means 22 of the camera unit 2 can generate a PinP video based on video signals for at least two screens. Except for this point, the configuration is the same as that of the first embodiment, so the common components are denoted by the same reference numerals and description thereof is omitted.

  The moving body detection means 26 detects, for example, a moving body from the difference between the video signals captured by the imaging section 21 via the video processing section 22 at predetermined time intervals and compares the video signals with the previous and next video. The coordinate information is converted into a control command and output to the control command processing unit 25. The moving object may be detected by detecting the coordinates in the video signal from the detection output using a hot-wire or infrared human body detector.

  When the video processing unit 22 is switched to the still image output mode according to the control signal, the video signal last recorded in the recording unit 23 in the moving image output mode can be taken out from the recording unit 23 and displayed on the intercom master unit 1 The image is enlarged or reduced to a proper resolution, further modulated, and output to the transmission unit 24. At this time, when a control signal for enlarging a part of the video is input from the control command processing unit 25, a part corresponding to the position information included in the control signal in the video for one screen taken out from the recording unit 23 Is used as a parent screen, and an image for one screen input from the imaging unit 21 is used as a child screen to generate an image on which PinP display is performed. The video signal is enlarged or reduced to a resolution that can be displayed by the doorphone master unit 1, further modulated, and output to the doorphone master unit 1 via the transmission unit 24.

  On the other hand, a control command including coordinate information detected by the moving body detection unit 26 of the camera slave unit 2 is input to the control command processing unit 24 of the doorphone base unit 1 via the transmission unit 13 of the doorphone base unit 1.

  If the video processing unit 11 is in the still image mode and does not perform enlarged display, the control command processing unit 24 displays a moving object display 33 indicating the area of the moving object (see FIG. 7 ( a), and an OSD control signal for causing the display unit 12 to display an operation display 32e including a character string such as “enlarged” is output to the video processing unit 11. Since the video processing unit 11 superimposes and displays the OSD display generated based on the OSD control signal on the video signal input via the transmission unit 13, the display is switched when the display mode is switched to the still image mode. In the unit 12, a moving body display 33 indicating a moving body is displayed on the video captured by the camera slave unit 2 at the time of switching to the still image mode.

  Here, when the user operates the operation switch 17 e, the operation unit 15 outputs an operation signal to the control command processing unit 14. In response to the operation signal, the control command processing unit 14 includes a control command including information on the enlarged region of the still image to be displayed on the display unit 12 based on the coordinate information from the moving body detection unit 26 of the camera slave unit 2. Is output to the camera slave unit 2 via the transmission unit 13. As described above, in response to the input of this control command, the camera slave unit 2 displays the video signal of the recording unit 23 and the video signal of the imaging unit 21 as PinP, and the video signal is output to the intercom master unit 1. On the display unit 12 of the doorphone master unit 1, as shown in FIG. 7B, a video having a still image as a parent screen and a moving image as a child screen is displayed. The display unit 12 displays characters “return” indicating the function of the operation switch 17e in the vicinity of the operation switch 17e. When the operation switch 17e is operated, the display is switched to the original display.

  Thus, since the moving body display 33 is displayed on the display unit 12 so as to overlap the still image, the moving body can be enlarged and displayed without adjusting the enlargement area. Further, since the state outside the house after switching to the still image mode by PinP display is displayed as a moving image, it is possible to grasp the situation outside the house and the action of a person.

  In this embodiment, after switching from the moving image mode to the still image mode, the still image in the detection area of the moving object is expanded by performing an enlargement operation with the operation switch 17e. When the cancel operation by the operation switch 17e is not performed for a certain period of time after the switch to, the detection area of the moving object may be enlarged and displayed. By doing so, usability is further improved. In this case, characters such as “cancel” are displayed on the operation display 32e.

  In the present embodiment, when the moving object detection area is enlarged and displayed in the still image mode, the moving image is displayed by the PinP display. However, in the still image mode, the moving image is always displayed by the PinP display. The moving image may not be displayed in PinP.

  By the way, in these above-mentioned embodiment, although the form which displays the image | video of the camera subunit 2 was demonstrated, it cannot be overemphasized that you may apply to the case where the image | video of the doorphone subunit | mobile_unit 3 is displayed.

1 is a block diagram showing a door phone system according to a first exemplary embodiment. (A) is the schematic which shows the time of still picture mode of the door phone master of the door phone system, (b) is the schematic which shows the time when the same door phone master performs the enlarged display in still picture mode, ( c) It is the schematic which shows another example when the door phone main unit performed enlarged display in still image mode. It is a sequence diagram which shows the example which a user uses the doorphone main unit. It is a sequence diagram which shows the example which a user uses the doorphone main unit. It is a sequence diagram which shows the example which a user uses the doorphone main unit. It is a block diagram which shows the door phone system concerning Embodiment 2. FIG. (A) is the schematic which shows the time of the still picture mode of the door phone main unit of the door phone system, (b) is the schematic which shows the time when the same door phone main unit performs the enlarged display in still picture mode.

Explanation of symbols

1 Doorphone master unit (master unit)
11 Video processing unit (video display means)
12 Display (Video display means)
16 Display mode switch (Display mode switching means)
2 (2a, 2b) Camera unit (Camera unit)
21 Imaging unit (photographing means)
3 Doorphone slave unit with camera (Camera slave unit)

Claims (7)

A camera-equipped child unit equipped with an imaging means and installed outdoors;
A main unit installed in the house with video display means for displaying video taken by the slave unit with a camera;
A display mode switching means for switching the display mode of the video display means to either a moving image mode for displaying a moving image captured by a camera-attached device or a still image mode for displaying a still image is provided in the master unit.
A monitoring system characterized in that when the display mode switching means switches to the still image mode, the video display means continues to display the video photographed by the camera-equipped slave unit as a still image at the time of switching.   The master unit has an enlarged area designating unit for designating an enlarged display area in the still image in the still image mode, and enlarges the still image in the enlarged display area designated by the enlarged area designating unit to display the video The monitoring system according to claim 1, wherein the monitoring system is displayed.   3. The camera-attached device generates a still image to be displayed on the video display means of the parent device in the still image mode, and outputs the still image to the parent device. A monitoring system according to claim 1. The camera-equipped child unit has a moving body detecting means for detecting the position of the moving body present in the video,
The monitoring system according to any one of claims 1 to 3, wherein the base unit enlarges the position detected by the moving body detection unit in the still image mode and causes the video display unit to display the enlarged position.   The master unit is provided in the master unit so that a position display indicating the position of the mobile object detected by the mobile object detection unit is superimposed on the still image and displayed on the video display unit in the still image mode. 5. The monitoring system according to claim 4, wherein when an enlarged display operation is performed using the operation means, a still image enlarged with the position display as a center is displayed on the video display means.   In the still image mode, the master unit superimposes the position display indicating the position of the moving body detected by the moving body detection unit on the still image and displays the position display on the video display unit. If the operation for canceling the enlarged display is not performed by using the operation means provided in the master unit until a certain time elapses after that, the still image enlarged centering on the position display is displayed on the video display means. The monitoring system according to claim 4, wherein:   The image display means of the master unit performs PinP (Picture in Picture) display in the still image mode, displays the still image on the parent screen, and displays the current image captured by the camera slave unit on the child screen. The monitoring system according to any one of claims 1 to 6, wherein a moving image is displayed.

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