JP2011035644A - Intercom system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly perform enlargement display even though a face of a visitor is picked up in anywhere within an image angle. <P>SOLUTION: An area including a position where the face is detected is displayed on a display device 13 after being automatically enlarged by an enlargement processing means (control part 17) when a face detecting means (control part 17) detects a face of a human from an image picked up by an imaging device 23 of a slave machine 2. Moreover, an area including a contact position detected by a contact position detecting means (touch panel 14) is displayed on the display device 13 after being automatically enlarged by the enlargement processing means (control part 17) when the face detecting means (control part 17) does not detect the face. Thereby the face of the visitor is properly performed for the enlargement display even though the face of the visitor is picked up in anywhere within the image angle. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an interphone system including an interphone slave unit with a camera and an interphone master unit having a display device for displaying an image captured by the camera of the interphone slave unit.

  Conventionally, various interphone systems including an interphone slave unit with a camera and an interphone master unit having a display device for displaying an image captured by the camera of the interphone slave unit have been provided (for example, see Patent Document 1). ). In this type of intercom system, when the intercom handset's call button is operated, the camera is activated to image the visitor, and the interphone base unit sounds a ringing tone from the speaker in response to a call from the interphone handset. At the same time, an image captured by the interphone slave camera is displayed on a display device such as a liquid crystal display, and a resident who hears the ringing tone and confirms the image displayed on the display device operates the call button of the interphone master device. Thus, a communication path is formed between the interphone master unit and the interphone slave unit, and communication becomes possible.

  Here, in the conventional example described in Patent Document 1, when the call button is operated on the interphone master unit, a range narrower than the angle of view of the interphone slave camera is enlarged and displayed on the display device. Makes it easier to check the faces of visitors.

JP 2008-177864 A

  However, in the conventional example described in Patent Document 1, a predetermined area (for example, a central area in a video with a wide angle of view before enlargement) is automatically enlarged and displayed, so that the face of the visitor is When it is close to the left or right, there is a possibility that the face is not shown in the enlarged image or only a part is shown.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an intercom system capable of appropriately enlarging and displaying a visitor's face wherever it is in the angle of view. .

  In order to achieve the above object, the present invention provides a voice communication between an intercom handset installed at an exterior entrance of a dwelling unit and having an imaging device for picking up a visitor, and an intercom handset installed in the dwelling unit. And interphone master unit that displays on the display device the video imaged by the imaging device of the interphone slave unit, the interphone master unit detects the face of the person shown in the video imaged by the imaging device A face detecting means for performing an operation, an enlargement processing means for enlarging an area including a position where the face detecting means has detected a human face, and displaying it on a display device, and a contact position for detecting a position touched by a person on the screen of the display device And an enlargement processing means that enlarges an area including the position detected by the contact position detection means when the face detection means does not detect a human face and displays the enlarged area on the display device. .

  According to the present invention, when the face detection means detects a face, the area including the position where the face is detected is automatically enlarged by the enlargement processing means and displayed on the display device, and the face detection means detects the face. If not detected, the area including the contact position detected by the contact position detection means is automatically enlarged and displayed on the display device by the enlargement processing means, so that the face of the visitor can be seen anywhere within the angle of view. The display can be enlarged appropriately.

It is a block diagram of an intercom master and an intercom slave in an embodiment of the present invention. It is a top view same as the above. It is a flowchart for demonstrating operation | movement of the intercom main unit in the same as the above. It is explanatory drawing of the image | video displayed on the display apparatus of the intercom main unit in the same as the above.

  Hereinafter, an embodiment in which the technical idea of the present invention is applied to an intercom system for a detached house will be described in detail with reference to the drawings.

  As shown in FIG. 2, the interphone system of the present embodiment includes an interphone master unit 1 installed in a dwelling unit and an interphone slave unit 2 installed at an outside entrance outside the dwelling unit.

  As shown in FIG. 1, an interphone slave unit (hereinafter, abbreviated as a slave unit) 2 encodes a microphone 20, a speaker 21, and an audio signal output from the microphone 20, and digitally modulates the signal in a relatively low frequency band. A speech unit 22 that digitally demodulates and decodes a modulated audio signal transmitted via the signal line Ls and generates sound from the speaker 21; a solid-state imaging device such as a CCD or CMOS; and an optical system such as a lens. An image pickup device 23 that picks up an image of a visitor, and a video signal output from the image pickup device 23 is encoded and digitally modulated in a frequency band relatively higher than an audio signal, and the modulated video signal is transmitted via a signal line Ls. The audio signal transmitted and output from the call unit 22 is frequency-multiplexed with the video signal and transmitted to the signal line Ls, via the signal line Ls. The communication unit 24 that separates the audio signal transmitted from the interphone master unit (hereinafter referred to as the master unit) 1 and a call signal is transmitted via the signal line Ls when an operation input of the call button 25a is received. The calling unit 25 and a box-shaped container 26 that accommodates these units and is installed on the wall of the outer entrance are provided. The device body 26 of the child device 2 is formed in a flat rectangular box shape, and a calling portion 25a is disposed at the lower part of the front surface.

  The power supply voltage (DC voltage) from the base unit 1 to the handset 2 is set to a relatively low state when the handset 2 is not in a talking state in order to reduce the power consumption of the system. It is considered high. Hereinafter, a state where the power supply voltage is low is referred to as a standby power supply state, and a state where the power supply voltage is high is referred to as an operation power supply state. In the handset 2, the call unit 22, the imaging device 23, and the communication unit 24 are in a standby state when in the standby power supply state, and when the call button 25 a is operated, the call unit 25 brings the communication unit 24 from the standby state. By returning to the normal state and reducing the line voltage of the signal line Ls to a voltage lower than that in the standby power supply state, the calling signal is transmitted to the base unit 1. When the base unit 1 that has received the calling signal changes the power supply voltage from the standby power supply state to the operation power supply state, the communication unit 22 and the imaging device 23 of the slave unit 2 return from the standby state to the normal state, and the imaging device 23 The output video signal is transmitted to the main unit 1 through the signal line Ls.

  On the other hand, the base unit 1 encodes the audio signal output from the microphone 10 and the speaker 11 and the microphone 10 and digitally modulates the audio signal in a relatively low frequency band and transmits the modulated audio signal via the signal line Ls. Through a speaker 12 that digitally demodulates and decodes the sound and sounds a sound from the speaker 11, a display device 13 formed of a liquid crystal display, a touch panel 14 disposed in front of the screen of the display device 13, and a signal line Ls. A communication unit 15 that transmits / receives audio signals to / from the slave unit 2 and receives a video signal, digitally demodulates and decodes the received video signal, and outputs the digital signal to the display device 13, and a mechanical switch such as a tact switch An operation that receives a plurality of operation switches and receives operation inputs by operating the operation switches. 16, and a control unit 17 that controls each unit of the CPU as principal components, a housing 18 for accommodating these portions.

  In the control unit 17, face detection processing and enlargement processing are executed on the video (image data) received from the slave unit 2. In the face detection process, feature amounts such as eyes, nose and mouth, which are feature portions of a human face, are extracted from image data for one frame, and an area from which these feature amounts are extracted is detected as a human face. It is processing. The enlargement process is a process for enlarging and displaying a partial area of image data received from the child device 2. Since any image processing is well known in the art, detailed description thereof is omitted.

  The touch panel 14 is well known in the art, and detects a position (contact position) where a human finger or the like touches the screen 13 a of the display device 13 and sends a signal (contact position signal) indicating the contact position to the control unit 17. Output.

  The housing 18 of the base unit 1 is formed in a flat rectangular box shape as shown in FIG. 2, and the screen 13a of the display device 13 is exposed at the upper center of the front surface. In addition, a touch panel 14 is disposed on the screen 13 a of the display device 13. Further, a call button 16a for operating the operation switch is arranged at the lower center of the front surface of the housing 18, and further, different operation switches are operated on the lower side of the screen 13a of the display device 13 on the front surface of the housing 18. The operation buttons 16b to 16e are arranged.

  Next, the operation of base unit 1 will be described with reference to the flowchart of FIG. When the communication unit 14 receives the calling signal transmitted from the slave unit 2 via the signal line Ls by the communication unit 14 (step S1), the control unit 17 of the master unit 1 demodulates the video signal transmitted from the slave unit 2 by the communication unit 14 The decoded video is displayed on the display device 13 (step S2), and it is further determined whether or not the touch panel 14 has been operated (whether or not a touch position signal is output from the touch panel 14) (step S3). If the contact position signal is not output, face detection processing is executed on the image data received from the slave unit 2 (step S4). When a human face is detected by the face detection process, the control unit 17 moves to a region including a position (pixel position) on the screen where the human face is detected (however, a region narrower than the original screen size). On the other hand, an enlargement process is executed to display an image enlarged to the original screen size on the display device 13 (step S5).

  Here, the visitor is outside the angle of view of the imaging device 23, the face is intentionally hidden with sunglasses and a mask, only the side profile of the visitor is imaged, or a part or all of the face is hidden. If the person's face cannot be detected by the face detection process, the control unit 17 cannot detect the person's face. The process returns to step S3. As shown in FIG. 4, even when a plurality of people (two people in the illustrated example) are captured within the angle of view of the imaging device 23 and the faces of a plurality of people are detected at the same time, the control unit 17 performs step S3. Return to processing.

  When the user (resident) touches the position of the person's face displayed on the screen 13 a of the display device 13, a contact position signal is output from the touch panel 14, and the control unit 17 receives the contact position signal from the touch panel 14. The display unit 13 displays an image enlarged to the original screen size by executing an enlargement process on an area including the image (however, an area narrower than the original screen size) (step S6). Further, the control unit 17 determines whether or not the touch panel 14 has been operated (step S7). When the touch position signal is output from the touch panel 14, the touch position signal received from the touch panel 14 is made to coincide with the center of the screen. The enlargement range is changed (step S8).

  Subsequently, the control unit 17 waits for an operation signal generated by the operation of the call button 16a from the operation unit 16 until a predetermined standby time (for example, 1 minute) elapses (steps S9 and S10). If the operation signal is output within the standby time, normal call processing is executed (step S11). If the operation signal is not output within the standby time, the processing is terminated and the standby power supply state is restored. After starting the call process, the control unit 17 ends the call process when an operation signal is output from the operation unit 16 by operating the call button 16a or when a predetermined call time (several minutes) elapses. To return to the standby power supply state (step S12).

  As described above, according to the present embodiment, when the face detection unit (control unit 17) detects a human face from the image captured by the imaging device 23 of the slave unit 2, an area including the position where the face is detected is obtained. When the enlargement processing means (control unit 17) automatically enlarges and displays on the display device 13, and the face detection means (control unit 17) does not detect a face, the contact position detection means (touch panel 14) detects it. Since the area including the contact position is automatically enlarged and displayed on the display device 13 by the enlargement processing means (control unit 17), the visitor's face is appropriately enlarged and displayed no matter where it is in the angle of view. be able to.

DESCRIPTION OF SYMBOLS 1 Intercom main unit 2 Intercom sub unit 13 Display device 14 Touch panel (contact position detection means)
17 Control unit (face detection means, enlargement processing means)
23 Imaging device

Claims (1)

The intercom handset installed at the exterior entrance of the dwelling unit is equipped with an image pickup device that images visitors, and the intercom handset installed inside the dwelling unit is used to send and receive call voices, and the image pickup device of the interphone handset captures images. Intercom master unit that displays the video to be displayed on the display device,
The intercom master unit detects a person's face in the image captured by the imaging device, and enlarges and displays an area including a position where the face detection unit detects the person's face on the display device. And an enlargement processing means for making contact, and a contact position detection means for detecting a position touched by a person on the screen of the display device,
The enlargement processing means enlarges an area including the position detected by the contact position detection means when the face detection means does not detect a human face, and displays the enlarged area on the display device.

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