JPH0346468A - Moving picture transmission system - Google Patents
Moving picture transmission systemInfo
- Publication number
- JPH0346468A JPH0346468A JP1181797A JP18179789A JPH0346468A JP H0346468 A JPH0346468 A JP H0346468A JP 1181797 A JP1181797 A JP 1181797A JP 18179789 A JP18179789 A JP 18179789A JP H0346468 A JPH0346468 A JP H0346468A
- Authority
- JP
- Japan
- Prior art keywords
- chromakie
- superimposed
- chromakey
- image
- picture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims description 12
- 238000000034 method Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 abstract description 9
- 230000006835 compression Effects 0.000 abstract description 7
- 238000007906 compression Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000002123 temporal effect Effects 0.000 description 6
- 239000002131 composite material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ｉ！ｉｉ像を合成するクロマキー技術を応用
した動画像伝送方式に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to i! This invention relates to a moving image transmission system that applies chromakey technology to synthesize II images.
（従来の技術）
２枚の画体を台底する方法としてクロマキー処理を用い
るものがある。第３図はクロマキー処理を説明する図で
あり、一方のＷＪ倣を背景にし、他方の画像の特定色の
部分を除いた部分を背景画像の上に重畳する。第３図で
、前者を背景画像１０１、後者を重畳画像１０２．結果
として台底された画像を合成画像１０３１重畳画像のう
ち重畳する被写体の部分を重畳部分１０４．特定色の重
畳しない部分を非重畳部分１０５と呼ぶことにする。(Prior Art) There is a method that uses chromakey processing as a method for combining two images. FIG. 3 is a diagram illustrating chromakey processing, in which one WJ pattern is used as a background, and a portion of the other image excluding a specific color portion is superimposed on the background image. In FIG. 3, the former is a background image 101, and the latter is a superimposed image 102. The resulting bottomed image is a composite image 1031, and the part of the subject to be superimposed in the superimposed image is a superimposed part 104. The portion where the specific color does not overlap will be referred to as a non-overlapping portion 105.
重畳画像１０２を通信路を介した受信動画像とした場合
を考える。Consider a case where the superimposed image 102 is a moving image received via a communication channel.
クロマキー用背景板の色むらや照明系撮像系のノイズ等
の撮影条件により、非重畳部分１０５にも時間的な変化
が起きる。非重畳部分１０５はその特定色によって非重
畳部分であることしか示していないため、この時間的変
化はむだな情報である。Temporal changes also occur in the non-overlapping portion 105 due to photographing conditions such as uneven color of the chromakey background plate and noise of the illumination system and imaging system. Since the non-overlapping portion 105 only indicates that it is a non-overlapping portion by its specific color, this temporal change is useless information.
動画像の符号化復号化の方式においてはフレーム間の相
関を利用して圧縮するようにしているものであるため２
重畳画像１０２をそのまま動画として伝送すると、この
時間的変化により符号化器の伝送量の圧縮効果が低下す
るという欠点があった。Since the encoding/decoding method for moving images uses the correlation between frames for compression, 2
If the superimposed image 102 is directly transmitted as a moving image, there is a drawback that the compression effect of the encoder's transmission amount is reduced due to this temporal change.
また、多地点からの重畳画像１０２を受信する場合には
９重畳画像１０２の各送信側の撮影条件をそろえること
はむずかしく、これにより非重畳部分１０５の特定色が
異なってしまう、このため送信地点が変わるたびに、受
信側のクロマキー処理の調節が必要となる欠点があった
。Furthermore, when receiving superimposed images 102 from multiple points, it is difficult to align the shooting conditions for each transmitting side of the nine superimposed images 102, which causes the specific color of the non-superimposed portion 105 to be different. The drawback was that the chromakey processing on the receiving side had to be adjusted every time the data changed.
さらに、前記の送信地点による非重畳部分１０５の特定
色の違いにより、多地点からの重畳画像を同時に受信側
の背景画像に重畳する場合には、対送信地点ごとにクロ
マキー装置の調節をする必要がある。という欠点があっ
た。Furthermore, due to the difference in the specific color of the non-superimposed portion 105 depending on the transmission point, when superimposing images from multiple points are simultaneously superimposed on the background image of the receiving side, it is necessary to adjust the chromakey device for each transmission point. There is. There was a drawback.
本発明は１重畳画像の非重畳部分の時間的変化を抑え１
通信系の符号化器による圧縮効率を向上させること、ま
たは、受信側クロマキー処理の調節を軽減することを目
的としている。The present invention suppresses temporal changes in non-superimposed parts of one superimposed image.
The purpose is to improve the compression efficiency of a communication system encoder or to reduce the adjustment of chromakey processing on the receiving side.
〔課題を解決するための手段〕
本発明においては２重畳画像に対し送信前にクロマキー
処理を施し、これを送信することを最も主要な特徴とし
、この点が従来の技術とは異なる。[Means for Solving the Problems] The main feature of the present invention is to perform chroma key processing on a double-superimposed image before transmission, and to transmit this, and this point differs from conventional techniques.
第１図は本発明の第１の実施例を説明する図であって、
２０１はクロマキー用背量板、２０２は重畳する被写体
、２０３は重畳画像撮像用のカメラ。FIG. 1 is a diagram illustrating a first embodiment of the present invention,
201 is a back plate for chromakey, 202 is a subject to be superimposed, and 203 is a camera for capturing superimposed images.
２０４は送信側クロマキー装置、２０５は符号化器。204 is a transmitting side chromakey device, and 205 is an encoder.
２０６は通信路、２０７は復号化器、２０８は受信側ク
ロマキー装置ｔ、 ２０９は背景画像ファイル装置。206 is a communication path, 207 is a decoder, 208 is a receiving side chromakey device t, and 209 is a background image file device.
２１０は出力表示装置である。210 is an output display device.
第１図を用いて処理を説明する。カメラ２０３によって
背景板２０１とともに被写体２０２を撮る。この画像の
被写体部分が重畳画像１０２の重畳部分１０４になる。The process will be explained using FIG. A camera 203 photographs a subject 202 together with a background plate 201 . The subject part of this image becomes the superimposed part 104 of the superimposed image 102.
送信側クロマキー装置２０４を用いて。Using the transmitting side chromakey device 204.
背景板２０１の色によってクロマキー処理を施し。Chromakey processing is performed depending on the color of the background board 201.
非重畳部分１０５の抽出を行うと同時に、非重畳部分１
０５を送信側クロマキー装置２０４が発生する受（３ｍ
クロマキー装置２０８のためのクロマキー用色に置き換
える。この重畳画像を符号化器２０５１通信路２０６．
復号化器２０７の通信系によって受信側に伝送する。受
信画像を受信側クロマキー装置２０８により背景画像フ
ァイル装置２０９のファイルから得た背ａｍ像１０１に
重畳し出力表示装置２１０により出力する。At the same time as extracting the non-overlapping portion 105, the non-overlapping portion 1
05 generated by the transmitting side chromakey device 204 (3m
Replace with the chromakey color for the chromakey device 208. This superimposed image is sent to the encoder 2051 through the communication channel 206.
It is transmitted to the receiving side by the communication system of the decoder 207. The received image is superimposed on the back am image 101 obtained from the file in the background image file device 209 by the receiving side chromakey device 208 and outputted by the output display device 210.
従来の技術によれば、送信側クロマキー装置２０４の処
理を行わず、クロマキー用背景板２０１の画像を直接重
畳画像の非重畳部分１０５として符号化することになる
ため、撮影条件による非重畳部分１０５の時間的変化が
符号化器２０５の伝送量圧縮効果を低下させる。これに
対し本実施例によれば符号化器２０５に送られる画像の
うち非重畳部分１０５は電気的に発生された均一色とな
るため、非重畳部分１０５の時間的変化がなくなり、符
号化器２０５の圧縮効果を低下させることが無い、そし
て。According to the conventional technology, the image of the chromakey background plate 201 is directly encoded as the non-overlapping portion 105 of the superimposed image without performing any processing by the transmitting side chromakey device 204. This temporal change reduces the transmission amount compression effect of the encoder 205. In contrast, according to the present embodiment, the non-overlapping portion 105 of the image sent to the encoder 205 has a uniform color that is electrically generated, so there is no temporal change in the non-overlapping portion 105, and the encoder 205 205 compression effect is not reduced, and.
送信側の撮影条件に影響を受けず、受信側でのクロマキ
ー処理のｍｖが容易で安定する。という効果がある。The mv of chromakey processing on the receiving side is easy and stable without being affected by the shooting conditions on the transmitting side. There is an effect.
第２図は本発明の第２の実施例を説明する図であって、
３０１は＃ｌ背景板、３０２は＃２背景板。FIG. 2 is a diagram illustrating a second embodiment of the present invention,
301 is a #l background board, and 302 is a #2 background board.
３０３は＃１被写体、３０４は＃２被写体、３０５は＃
１カメラ、３０６は＃２カメラ５３０７は＃１送信側ク
ロマキー装置、３０８は＃２送信側クロマキー装置、３
０９は＃１符号化器、３１０は＃２符号化器。303 is #1 subject, 304 is #2 subject, 305 is #
1 camera, 306 is #2 camera 5307 is #1 transmitting side chromakey device, 308 is #2 transmitting side chromakey device, 3
09 is a #1 encoder, and 310 is a #2 encoder.
３１１は通信網、３１２は背景画像ファイル装置。311 is a communication network, and 312 is a background image file device.
３１３は＃ｌ復号化器、３１４は＃２復号化器、３１５
は＃ｌ受信側クロマキー装置、３１６は＃２受信側クロ
マキー装置、３１７はＣＲＴである。313 is a #l decoder, 314 is a #2 decoder, 315
is a #1 receiving side chromakey device, 316 is a #2 receiving side chromakey device, and 317 is a CRT.
第２図においては、２カ所の送信地点から送信された重
畳画像を受信して背景画像に重畳する例である。２枚の
各非重畳部分は＃ｌ送信側クロマキー装置３０７と＃２
送信側クロマキー装置３０８とで電気的に発生された均
一色であるため、容易に同一色にすることができる。こ
れにより＃ｌ受信側クロマキー装置３１５と＃２受信側
クロマキー装置３１６との調整は同しでよく、シかも送
信地点が変わるごとの調整も不要であり、調整の負担が
軽減される。FIG. 2 shows an example in which superimposed images transmitted from two transmission points are received and superimposed on a background image. Each of the two non-overlapping parts is #l transmitting side chromakey device 307 and #2
Since it is a uniform color that is electrically generated by the transmitting side chromakey device 308, it is easy to make it the same color. As a result, the #1 receiving side chromakey device 315 and the #2 receiving side chromakey device 316 only need to be adjusted in the same way, and there is no need to make adjustments every time the transmission point changes, reducing the burden of adjustment.
以上説明したように、受信側でクロマキー処理により合
成することを前提とした動画像を、送信側のクロマキー
処理により非重畳部分を均一色に置き換えるため、符号
化器の圧縮効果を低下させないという利点がある。As explained above, for moving images that are intended to be synthesized by chromakey processing on the receiving side, non-overlapping parts are replaced with uniform colors by chromakey processing on the transmitting side, which has the advantage of not reducing the compression effect of the encoder. There is.
受信側のクロマキー処理のためのクロマキー色は送信側
で電気的に発生した均一色であり送信側の撮影条件とは
無関係であるため、受信側でのクロマキー処理の調節が
軽減できるという利点がある。The chromakey color for chromakey processing on the receiving side is a uniform color that is electrically generated on the transmitting side and is unrelated to the shooting conditions on the sending side, which has the advantage of reducing the need to adjust chromakey processing on the receiving side. .
また本発明は、符号化器や復号化器に改造を加える必要
が無いため、既存の画像伝送システムとの親和性が良い
という利点がある。Furthermore, the present invention has the advantage of good compatibility with existing image transmission systems since there is no need to modify the encoder or decoder.
第１図は本発明の第１の実施例の説明図、第２図は本発
明の第２の実施例の説明図、第３図はクロマキー処理の
説明図である。
図中、１０１は背景画像、１０２は重畳画像、１０３は
合成画像、１０４は重畳画像の重畳部分、 １０５は
重畳画像の非重畳部分であり、２０１は背景板２０２は
重畳する被写体、２０３はカメラ、２０４は送信側クロ
マキー装置、２０５は符号化器、２０６は通信路、２０
７は復号化器、２０８は受信側クロマキー装置、２０９
は背景画像ファイル装置、２１０は出力表示装置である
。FIG. 1 is an explanatory diagram of a first embodiment of the present invention, FIG. 2 is an explanatory diagram of a second embodiment of the present invention, and FIG. 3 is an explanatory diagram of chromakey processing. In the figure, 101 is the background image, 102 is the superimposed image, 103 is the composite image, 104 is the superimposed part of the superimposed image, 105 is the non-superimposed part of the superimposed image, 201 is the background plate 202 is the subject to be superimposed, and 203 is the camera. , 204 is a transmitting side chromakey device, 205 is an encoder, 206 is a communication path, 20
7 is a decoder, 208 is a receiving side chromakey device, 209
210 is a background image file device, and 210 is an output display device.
Claims (1)
合成するに当って、前記重畳画像を伝送した上で合成す
るようにした動画像伝送方式において、 前記重畳画像を構成する動画像中の被写体以外の部分を
予め定められた均一色に置き換える手段をそなえ、 当該均一色に置き換えられた重畳画像を圧縮伝送する ことを特徴とする動画像伝送方式。[Scope of Claims] In a moving image transmission method in which a superimposed image is synthesized with a background image by chromakey processing, the superimposed image is transmitted and then synthesized, comprising: a moving image constituting the superimposed image; A moving image transmission method comprising means for replacing parts other than the subject with a predetermined uniform color, and compressing and transmitting a superimposed image replaced with the uniform color.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18179789A JP2878716B2 (en) | 1989-07-14 | 1989-07-14 | Video transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18179789A JP2878716B2 (en) | 1989-07-14 | 1989-07-14 | Video transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0346468A true JPH0346468A (en) | 1991-02-27 |
| JP2878716B2 JP2878716B2 (en) | 1999-04-05 |
Family
ID=16107030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18179789A Expired - Fee Related JP2878716B2 (en) | 1989-07-14 | 1989-07-14 | Video transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2878716B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5808682A (en) * | 1993-06-14 | 1998-09-15 | Sega Enterprises, Ltd. | Picture data processing system for processing picture data representing foreground and background |
| JP2003078589A (en) * | 2001-09-05 | 2003-03-14 | Aruze Corp | Communication equipment |
-
1989
- 1989-07-14 JP JP18179789A patent/JP2878716B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5808682A (en) * | 1993-06-14 | 1998-09-15 | Sega Enterprises, Ltd. | Picture data processing system for processing picture data representing foreground and background |
| JP2003078589A (en) * | 2001-09-05 | 2003-03-14 | Aruze Corp | Communication equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2878716B2 (en) | 1999-04-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |