JPH01205673A - Picture synthesizing circuit - Google Patents

Abstract

PURPOSE:To display a portrait picture from plural districts on one screen by extracting a portrait picture data only from a picture data sent from each of plural points and inserting the data into a partial area assigned in the area of a background picture. CONSTITUTION:Only portrait picture data 421-42n are extracted from picture data 411-41n sent from each of plural points S1-Sn at corresponding to portrait picture extraction sections 11-1n. The portrait data 421-42n are stored in a display background storage section 2 by a picture synthesis section 3 and inserted into partial areas 431-43n, assigned to each of the plural points S1-Sn in the area of the background picture to be displayed at the receiver side. Thus, the portrait data in the picture data sent from each of the plural points S1-Sn is displayed on one screen.

Description

[Detailed Description of the Invention] [Summary] This invention relates to an image synthesis circuit that synthesizes image data from image data received from a plurality of transmission destinations, and aims to display human images from a plurality of points on one screen. a person image extraction unit that extracts only person image data from each of the image data transmitted from each of the plurality of points;
a display background image storage unit that stores a background image to be displayed on the receiving side; and a display background image storage unit that stores a background image to be displayed, and extraction of the person image in a partial area allocated to each of the plurality of points within the area of the background image to be displayed. and an image synthesis section into which human image data extracted in each section is inserted.

[Industrial application field]

The present invention relates to an image synthesis circuit that synthesizes image data from image data received from a plurality of transmission partners.

In recent years, there has been a demand for holding video conferences between multiple points.

In such cases, images of conference participants are transmitted from multiple locations via telephone lines, etc., but conventionally, these images are transmitted on separate monitors. It was displayed. however,
There are problems such as conference participants having to look at a large number of monitors, and there has been a need for a technology to display these images on a single screen.

[Prior art and problems to be solved by the invention]

Conventionally, when holding a multi-point video conference, etc., images of conference participants are sent from multiple locations via telephone lines, etc., and are displayed on separate monitors. It had been. However, in this case, there are problems such as the need for conference participants to view a large number of monitors and the need to provide a large number of image display devices such as CRTs.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an image synthesis circuit that displays images of people from a plurality of points on one screen.

[Means to solve the problem]

FIG. 1 is a basic configuration diagram of the present invention. In this figure, 1
8.1□,...1. , 2 is a display background image storage unit, and 3 is an image synthesis unit.

Person image extraction unit 1□1□,...1. is multiple points S I
+ S t+...S, , the image data 41, . 41! ,...417, the person image data 42. ．． 42□, ... Extract only 42fi. The display background image storage unit 2 stores a background image to be displayed on the receiving side.

Then, the image synthesizing section 3 places the person image extracting section in the partial areas 43□43□,...43n allocated to each of the plurality of points Sl+SZ+...Sfi within the area of the background image to be displayed. 11. Person image data 42. extracted in each of 1□,...1n. ．． Insert 42n.

[For production]

Image data 41. transmitted from each of the plurality of points Sl+SL+...S7. ．． 41□,...41. Only the person image data 421, 42n are extracted in the corresponding person image extraction units 11+Ig+...1, respectively. The person image data 421, 42n are processed in the image synthesis section 3 by
The plurality of points S l l in the area of the background image to be displayed on the receiving side, which is stored in the display background image storage unit 2
Partial area 4 allocated to each of S2+...S7
3. ．． 43□, ... is fitted into 437.

It is fitted into 437.

In this way, among the image data transmitted from each of the plurality of points S l+ S R+...S7, the human image data is
Displayed on one screen.

〔Example〕

FIG. 2 shows the person image extraction unit 1i (i=1~
An example of the configuration of n) is shown below. In Figure 2, 11
4 is a background frame memory, 12th is a reception frame memory, 13i is a pixel data comparison section, 144 is a human image extraction calculation section, and 15! is a changeover switch.

The background frame memory lli stores information S for each of the plurality of points.
The background image of each point sent from i is stored. The reception frame memory 12i stores images in which a person appears in front of the background image, which are transmitted from each of the points S.

The changeover switch 154 is switched to the fifth side of the background frame memory 11 before transmitting the image in which the person appears.
By transmitting the background image of each point from each of the points Si, the background image is stored in the background frame memory lli, and after the storage is completed, it is switched to the receiving frame memory 125 side. , it is possible to receive images of people appearing from each of the above points Si. Pixel data comparison section 13. is each of the above points S
, the area occupied by the person image in the person appearance image is detected by comparing the person appearance image and the background image pixel by pixel. The person image extraction calculation unit 144 extracts only a person image from the person appearance image based on the area occupied by the person image.

In particular, in the configuration shown in FIG. 2, the pixel data comparison section 13i subtracts the corresponding data of the background image from the data of the image in which the person appears for each pixel. In addition, corresponding to this, the human image extraction calculation unit 14 in FIG.
5. For pixels for which the output of the pixel data comparison section 13□ is zero (indicated by X=O in FIG. 3), the output of the pixel data comparison section 13i is output as is;
For pixels whose output in the pixel data comparison section 13 is not zero (indicated by X≠0 in FIG. 2), each output of the pixel data comparison section 134 and data of the corresponding pixel in the background frame memory Add and output.

Alternatively, although not shown, the human image extraction calculation section 1
4i is the pixel data comparison section 13! The gate circuit power ζ outputs only the data of the pixels in the area occupied by the human image detected by the pixel data comparison section 13i under the control of
It may also be made up of:

An example of operation as described above is shown in FIG. In FIG. 4, 41+41g and 41s are respectively points SI+S! This is an image of a person appearing sent from , and S. A person image extraction unit 11.1□ as described above,
and 1. After that, the above character appearance images 41+41g and 41. From these, only human images 42, 42□ and 423 are extracted.

FIG. 3 shows an example of the configuration of the image synthesis section 3 shown in FIG. 1. In FIG. 3, 31 is a control section, 32 and 33
1 shows the functions of the image composition section 3 under the control of the control section 31. That is, 32 is the image composition section 3
However, the pixel data comparing section 13. ．． 13□, . . . 13 degrees, the pixels in the area occupied by the human image (indicated by X≠0 in FIG. 3) are determined by the corresponding human image extraction calculation units 141, 14 □, . , and 33 indicates the output of other pixels (X in Fig. 3).
=0) indicates that the output of the background image storage section 2 constitutes the image to be displayed.

vinegar.

An example of the operation of the image composition section 3 is also shown in FIG. In FIG. 4, numeral 44 indicates a background image to be displayed on the receiving side, which is stored in the background image storage section 2, and numeral 45 indicates the entire image area to be displayed on the receiving side. The area 4
5, what is shown within the broken lines 43, 43□ and 433 is an example of the partial area allocated to each of the plurality of points S+ + S z and S3 described above. The above-mentioned person image data 421, 42□, and 423 are
The images are fitted into the partial areas 431°, 43□, and 433 by the image synthesis unit 3, respectively. Furthermore, as mentioned above, even within these partial areas 43, 43□ and 433, regarding pixels other than the area occupied by the human image,
The output of the background image storage section 2 constitutes an image to be displayed.

As described above, according to the present invention, only a person can be extracted from an image of a person appearing in a still background image transmitted from a plurality of points and displayed on one screen.

〔Effect of the invention〕

According to the present invention, images of people from multiple locations can be displayed on one screen.

[Brief explanation of the drawing]

FIG. 1 is a basic configuration diagram of the present invention. FIG. 2 is a diagram showing an example of the configuration of the human image extraction section in the configuration of FIG. 1. FIG. 3 is a diagram showing an example of the configuration of the image synthesis section in the configuration of FIG. 1. FIG. 4 is a functional explanatory diagram of the present invention. [Explanation of symbols] 11.1□, ~17...Person image extraction unit, 2...Display background image storage unit, 3...Image synthesis unit, 1.1. ．． 111,,
~ 11. , . . . background frame memory, 12, . 12□,
~ 121, . . . reception frame memory, 13, . 13□,
~ 13n...Pixel data comparison section, 141+14! +~1
4, . . . person image extraction calculation section, 15, . . changeover switch, 31 . . . control section, 41, . 41□, 41,...image of a person appearing, 42,. 42□, 423...Person image, 43,. 43□, 43... partial area, 44... background image to be displayed on the receiving side, 45... image area to be displayed on the receiving side. Basic configuration diagram of the present invention Part 1 Diagram showing an example of the configuration of the human image extraction unit in the configuration shown in Figure 1 Part 2

Claims (1)

[Claims] 1. Image data (41_1, 41_2,...41) transmitted from each of a plurality of points (S_1, S_2,...S_n)
_n), person image data (42_1, 42
_2,...42_n)
_1, 1_2,...1_n), a display background image storage unit (2) that stores a background image to be displayed on the receiving side, and a plurality of points (
Person image data (42_1 ,42_2
,...42_n). 2. The person image extraction unit (1_1, 1_2,...1_n)
are the plurality of points (S_1, S_2,...S
Background frame memories (11_1, 11_2) that store background images of respective points transmitted from each of
,...11_n), and a receiving frame memory (12_1,
12_2,...12_n), and for each of the plurality of points (S_1, S_2,...S_n), the image in which the person appears and the background image are compared pixel by pixel to determine the area occupied by the image of the person in the image in which the person appears. Pixel data comparison unit (13_1, 13_2,
...13_n), and a person image extraction calculation unit (14_n) that extracts only a person image from the image in which the person appears based on the area occupied by the person image.
_1, 14_2, . . . 14_n). 3. The pixel data comparison unit (13_1, 13_2,...1
3_n) subtracts the corresponding data of the background image from the data of the image in which the person appears for each pixel. 4. The human image extraction calculation unit (14_1, 14_2,...
14_n), each of the pixel data comparison units (13_1
, 13_2, . 5. The pixel data comparison unit (13_1, 13_2,...1
3_n) each of the pixel data comparison units (13_1,
13_2,...13_n) for which the output is zero, the pixel data comparison unit (13_1, 13_n)
_2,...13_n) are output as they are,
The pixel data comparison unit (13_1, 13_2,...13_n
), the output of each of the pixel data comparators (13_1, 13_2,...13_n) and the background frame memory (11_1, 11_n) are
4. The human image extracting circuit according to claim 3, wherein data of corresponding pixels in each of _2, . . . 11_n) are added and output. 6. The image synthesis section (3) includes the pixel data comparison section (
13_1, 13_2,...13_n), the pixels in the area occupied by the human image detected in each of the human image extraction calculation units (14_1, 14_2,...14_n)
6. The image synthesis circuit according to claim 2, wherein the image to be displayed is configured by the output of the background image storage section (2) for other pixels.