JPS63208383A - Doorphone equipped with camera - Google Patents

Abstract

PURPOSE:To attain the same swing effect even with a stationary TV camera by storing an input picture with wide visual field tentatively and processing it to arrange the head of a visitor to a proper position on the screen and outputting the result on a picture display device. CONSTITUTION:A TV camera 3 is provided together with a handset 2 to a doorphone slave set 1 outdoor. A picture display device 6 is provided to a doorphone master set indoor together with a handset 5. A lens system with a wide visual field more than the display range of the display device 6 as the TV camera 3 and a half of the vertical width of the input picture, for example is displayed on the display device 6. The picture data digital-converted by the display transmitter 7 and received by the receiver 8 is stored tentatively in the storage device 10, processed by a data processing circuit 11, the position of the head of the object is calculated to generate a proper partial pattern and it is stored tentatively in the auxiliary storage device 12 and displayed on the display device 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field 1] The present invention relates to an improvement of a camera-equipped doorbell.

[Background Art 1] Fig. 3(a) shows a conventional door phone with a camera, in which a door phone sub unit 1 on the outdoor side is provided with a telephone receiver 2 and a television camera 3, and a V-phone main unit 4 on the indoor side is provided with a telephone receiver 2 and a television camera 3. An image display device 6 made of a CRT or the like is provided together with a transmitter/receiver device 5, and visitors can be monitored by operating a switch from inside the room. FIG. 2B shows a block diagram, in which the image signal is transmitted from the transmitting device 7 to the receiving device 8 via a transmission cable. Reference numeral 9 denotes a side sound protection circuit for compounding and separating the transmitting signal and the receiving signal.

Figure 4 shows how a conventional doorbell with a camera is used. Generally, the camera is installed at a height of 140 cm from the ground.
The height is -150cm, and the distance to subject A is approximately 50cm.
cm, as shown in the (a) figure, about 60 cm above and below
It is designed to be able to monitor subject A with a width of As shown in the figure, if you are taller than 1,180 cm, your face may be off the monitor screen, or you may not be able to see from the neck down.
There were some drawbacks.

In addition, if a wide-angle lens was used for the camera as a countermeasure, the field of view of the camera would be widened, but the visitor's face would become smaller, making it difficult to identify the visitor (1).

[Purpose of the Invention] The present invention has been made in view of the above points, and is a doorbell with a camera that automatically follows the height of the visitor, even though it is a fixed camera, and allows the image display to be adjusted appropriately. The purpose of the present invention is to provide a doorbell with a camera that can display a visitor's face at a certain location.

[Disclosure 1 of the Invention The present invention provides a camera-equipped doorphone that monitors visitors using a television camera attached to the doorphone slave unit and an image display attached to the doorphone master unit. As a TV camera, we use a lens system with a wider field of view than the display range of the image display, a storage device that digitally converts human image data and temporarily stores it, and a storage device that processes the stored data. It is equipped with a data processing circuit that places the head at the appropriate position on the screen and outputs it to the image display, and by setting the human image larger than the displayed image and displaying the desired part. The feature is that it can achieve the same effect as when a television camera is oscillated.

Embodiment FIG. 1 shows an embodiment of the present invention, in which a door intercom subunit 1 on the outside is equipped with a handset 2 consisting of a microphone and a speaker.
A television camera 3 is also provided, and an image display device 6 is provided on the door phone master unit 4 on the indoor side along with a handset rf15 consisting of, for example, a handheld F-type microphone and earphones. α is the same as the conventional example in the tiS3 diagram.

Further, in the present invention, a lens system having a wider field of view than the display range of the image display 6 is used as the television camera 3, so that, for example, 1/2 of the vertical width of the human-powered image is displayed on the image display 6. The image data that is gain-transformed and transmitted by the display transmitter 7 and received by the receiver M device 8 is temporarily stored in the storage device 10, and is processed by a data processing circuit 11 using a CPU, for example, to By calculating the position of the top of A's head, an appropriate partial screen is created, this is temporarily stored in the auxiliary storage device 12, and the image data in the auxiliary storage VCFF12 is displayed on the image display 6. be. Of course, the auxiliary storage device 12
The partial screen data may be stored in the storage device 10 without using the partial screen data.

FIG. 2 shows the relationship between the subject A and the display screen according to the present invention. (a) As shown in FIG. ), and in the case of figure (a), the top and bottom of the input image are cut off and displayed on the display screen.

In addition, if the subject A is a child as shown in (b), the upper part of the input image is cut off and the lower half is displayed, and (c) if the subject is a tall adult as shown in the figure, the input image is Only the top half of is displayed.

[Effects of the Invention] As described above, the present invention includes a storage device that creates data in a wider range than the display range of an image display as input image data from a television camera, converts it into digital data, and temporarily stores it; It is equipped with a data processing circuit that processes the stored data to place the visitor's head in the appropriate position on the screen and outputs it to the image display, so even though it is a fixed TV camera, it This has the advantage that it can achieve the same effect as adjusting the height of the visitor by swinging the head.

[Brief explanation of the drawing]

FIG. 1 (,) is a schematic system diagram showing one embodiment of the present invention, (
b) is a block diagram of the same as above, FIG. 2(a), (b), and (C) are operation explanatory diagrams of the same as above, FIG. 3(a) is a schematic system diagram of the conventional example, (b) is a block diagram of same as above, Figure 4(a)(b)(c)
) is an explanatory diagram of the same operation. DESCRIPTION OF SYMBOLS 1... Door phone slave, 2... Handset, 3... TV camera, 4... Door phone main unit, 5... Transceiver, 6... Image display, 7... Transmission VC placement, 8...
- Receiving device, 9... side sound protection circuit, 10... storage device, 11... data processing circuit, 12... auxiliary storage device. Agent Patent Attorney Ishi 1) Chief 771 Figure 3 L J Figure 4

Claims (1)

[Claims] (1) In a doorbell with a camera that monitors visitors using a TV camera attached to the doorphone slave unit and an image display attached to the doorphone main unit, the field of view of the TV camera is larger than the display range of the image display. Using a wide lens system, a storage device that digitally converts the input image data and temporarily stores it, and processes the stored data to place the visitor's head in the appropriate position on the screen and output it to the image display. A door intercom with a camera comprising a data processing circuit for processing data.