JPS62109485A - Image centering method for video conferencing system - Google Patents

Abstract

PURPOSE:To correctly arrange a prescribed human image at the center of a television a screen by installing at a transmission side a human image centering part which can be fine-adjusted, and remote-controlling the centering part from a control part on a reception side. CONSTITUTION:This system is a facility in which a human image centering part 16 is additionally installed in No.1 conference room 1 at the transmission side. First, the rough adjustment of motor driven turning type universal head 12 of a television camera 11 is performed according to a selection signal SEL from the control part 22 of No.2 conference room 2 on the reception side by an existing preset servomotor 15. Next, the human image centering part 16 is started according to a start signal from the preset servomotor 15, and finally a fine adjustment is made so that the prescribed human image can be arranged at the center of the screen of a monitor television 21.

Description

[Detailed Description of the Invention] [Summary] This is a person image centering method for a video conferencing system, in which one of multiple attendees is selected by a television camera in a conference room on the transmitting side (if The image of the attendee can be automatically controlled to appear in the center of the TV screen in the conference room on the side.

[Industrial application field]

The present invention relates to a human image centering method for a video conference system.

Nowadays, when people from far-off points have a meeting about important matters, the participants of the meeting are photographed by a TV camera on the transmitting side, and the images are received on a monitor TV on the receiving side to listen to what the participants have to say. Videoconferencing systems that can do this are widely used, helping to overcome time and geographical burdens and improving the efficiency of meetings.

[Conventional technology]

Generally, when sending a human image taken by a television camera from a conference room on the transmitting side to a conference room on the receiving side, it is compressed via an image signal compression device on the transmitting side to save the cost of the transmission line. The image signal was expanded again using an image signal expansion device and displayed on a television monitor screen.

[Problem that the invention seeks to solve]

Conventionally, because of the image signal compression device, there was a delay time between the actual movement of a person on the transmitting side and the movement of the person displayed on the television screen on the receiving side.

Therefore, when the receiving side wants to remotely control the electric rotating pan head on which the transmitting side's TV camera is mounted to display a desired person, the presence of this delay time causes the camera to display a desired person in the center of the TV screen. I can't project an image,
There was a problem.

In order to solve this problem, a method was developed in which the seating positions of attendees were fixed and a preset servo motor was remotely controlled from the receiving side to move the preset television camera.

However, this method has the problem that attendees are forced to sit, resulting in a low degree of freedom and unnatural operation.

[Means for solving problems]

An object of the present invention is to solve the above-mentioned problems, and when a predetermined image of a person is selected by remotely controlling a television camera on the transmitting side from the receiving side of a video conference system, the image of the person is displayed in the center of the television screen on the receiving side. The reason is that it is placed automatically.

As shown in FIG. 1, the method is to add a human image centering section I6 to the first conference room 1 on the transmitting side, and first use the selection signal SEL from the operating section 22 in the second conference room 2 on the receiving side to TV camera 1 with preset servo motor 15
1. Perform coarse adjustment of the pan head 12 (■), then use the activation signal from the preset servo motor 15 to (■) activate the human image centering section. This allows it to be placed in the center of the screen.

[For production]

As described above, according to the present invention, since a human image centering section that can perform fine adjustments is provided on the transmitting side, this can be remotely controlled from the operation section on the receiving side, so that a predetermined human image can be displayed on the television screen. It can be placed exactly in the center. Furthermore, there is no need to fix the seating positions of the attendees.

〔Example〕

The invention will now be explained by way of example with reference to the accompanying drawings.

FIG. 2 is a diagram showing an embodiment of the present invention.

The apparatus shown in FIG. 2 consists of a first conference room 1 and a second conference room 2. In this embodiment, the first conference room 1 is explained as the transmitting side of the human image, and the second conference room 2 is explained as the receiving side. There is.

The first conference room I is comprised of a television camera 11, an electric rotating percentage type % device 14, a preset servo motor 15, and a human image centering section 16.

The television camera 11 photographs a person selected from a plurality of people.

The electric rotating pan head 12, on which the television camera 11 is mounted, is moved by a predetermined amount by signals a and b2 from the preset servo motor 15 and the human image centering section 16.

The image signal compression device 13 performs band compression on the image of the person captured by the television camera 11 and sends the compressed image to the transmission path.

The control signal receiving device 14 receives the person selection signal SEL from the second conference room 2 and transmits it to the preset servo motor 15 .

The preset servo motor 15 moves the pan head 12 by an initially set amount in response to the rough adjustment signal a.

The human image centering section 16 is activated by the adjustment end signal b1, calculates a fine adjustment amount, generates a fine adjustment signal b2, and moves the pan head I2 by the calculated amount.

The second conference room 2 includes a monitor television 21, an operation section 22, an image signal expansion device 23, and a control signal transmission device 24.

The monitor television 21 displays images of people sent from the first conference room 1.

The operation unit 22 inputs a selection signal of a person to be selected from among the plurality of people present in the first conference room 1.

The image signal expansion device 23 expands the band of the compressed human image and restores it to a video signal.

The control signal transmitting device 24 transmits the selection signal from the operation unit 22 to the first conference room 1.

Hereinafter, the operation of the apparatus shown in FIG. 2 having the above configuration will be explained based on FIG. 3.

The background 18 of the first conference room l (Fig. 3 (
A)) is a solid color (e.g. blue) wall or curtain;
On the monitor TV 21 in the second conference room 2! It is easy to get contaminated.

Now, on table 17 in the first conference room L is Pl.

Three people named Pz and Pz are seated.

In the second conference room 2, the person P is watching the monitor TV 21.
In order to switch the video to P2, the selection signal SEL of P2 is input from the operation section 22.

This signal SEL is received by the receiving device 14 in the first conference room 1 via the control signal transmitting device 24 and transmitted to the present servo motor 15.

A coarse adjustment signal a is sent from the motor 15 to the pan head 12, and the coarse adjustment is completed after moving by the initial setting amount. At this time, the television camera 11 is directed toward the person P2 as shown by the dashed line in FIG. 3(A).

Next, a rough adjustment end signal bl is sent from the motor 15 to the centering section 16. At this time, the centering unit 16 receives the video signal I2 from the television camera 11, calculates the movement iX for setting the person P2 at the center l, and converts it into the movement amount X of the pan head 12 (third Figure (B)).

The centering unit 16 sends a fine adjustment signal b2 composed of this movement amount x to the pan head 12. Panhead 1 that received this
2 is moved by a moving amount X, and control is performed so that the person P2 is located on the center β when viewed on the monitor television 21. This amount of movement x is determined, for example, by the shift between the center of a signal change point (changes at the boundary between the background and the face) on a certain scanning line SC and the center point of the screen.

Thereby, the fine adjustment is completed, and the person's image from the television camera If is displayed on the monitor television 21 via the compression device I3 and the expansion device 23.

〔Effect of the invention〕

As described above, according to the present invention, a human image centering section that can perform fine adjustments is provided on the transmitting side, and by remotely controlling this from the operating section on the receiving side, a predetermined human image can be displayed on the TV. It can be placed exactly in the center of the screen. Furthermore, since there is no need to fix the seating positions of the attendees, a natural video conference can be realized.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing an embodiment of the present invention, and FIG. 3 is a diagram explaining the operation of the present invention. ■... 1st conference room, 2... 2nd conference room, 11... TV camera, 12 electric rotating pan head, 13... image signal compression device, 14... control signal receiving device, 15... Preset servo motor, 16... Human image centering unit, 21... Monitor television, 22... Operation unit, 23... Image signal expansion device, 24... Control signal transmitting device.

Claims (1)

[Claims] One of the plurality of people is photographed by a television camera in either the first conference room or the second conference room, and the person's image is displayed on the television screen in the other conference room. In the human image centering method of the video conference system, a selection signal of the person to be photographed is transmitted from the other conference room to one conference room, and the selection signal causes a preset servo motor to move the electric motor in which the television camera is mounted. A coarse adjustment signal is sent to the rotating pan head, and when the rough adjustment is completed, the person centering section sends a fine adjustment signal to the pan head, so that the photographed image is placed in the center of the TV screen in the other conference room. A human image centering method for a video conference system characterized by arranging human images.