JPH0447871A - Object extraction device - Google Patents
Object extraction deviceInfo
- Publication number
- JPH0447871A JPH0447871A JP2157165A JP15716590A JPH0447871A JP H0447871 A JPH0447871 A JP H0447871A JP 2157165 A JP2157165 A JP 2157165A JP 15716590 A JP15716590 A JP 15716590A JP H0447871 A JPH0447871 A JP H0447871A
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- 238000000605 extraction Methods 0.000 title claims abstract description 24
- 230000001678 irradiating effect Effects 0.000 claims description 6
- 239000000284 extract Substances 0.000 abstract description 7
- 230000000007 visual effect Effects 0.000 abstract 1
- 238000003384 imaging method Methods 0.000 description 23
- 230000003321 amplification Effects 0.000 description 22
- 238000003199 nucleic acid amplification method Methods 0.000 description 22
- 238000010586 diagram Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、背景・物体を含む画像信号から背景よりも前
面に位置している物体のみの画像情報を。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention obtains image information of only objects located in front of the background from an image signal including the background and objects.
簡便高精度に抽出する物体抽出装置に関するものである
。The present invention relates to an object extraction device that extracts objects easily and with high precision.
従来のこの種の装置は、背景・物体を含む画像信号から
背景を除去し、物体を抽出し、物体のみの画像を得るた
めに２非常にあざやかな青色のスクリーンなどの特殊な
背景を用い５色差信号に基づいたクロマキー処理を行う
ことにより、物体を抽出していた（共覧形画面電話にお
ける画像合成方法の検討、 １９９０年春期儒学全大Ｂ
−７９１）。Conventional devices of this kind remove the background from an image signal containing the background/object, extract the object, and use a special background such as a very bright blue screen to obtain an image of only the object. Objects were extracted by performing chromakey processing based on color difference signals.
-791).
また、特殊な背景を使用しないでもすむように背景画像
を保持するための背景メモリを有し、背景メモリないの
画像と背景・物体を含む画像信号との差分信号を用いる
ことにより背景を除去し物体を抽出し、物体のみの画像
を得ていた。In addition, it has a background memory to hold a background image so that there is no need to use a special background, and the background can be removed by using the difference signal between the image without the background memory and the image signal including the background/object. was extracted and an image of only the object was obtained.
従来の技術ではこのように特殊な背景を使用するために
２通常のオフィス内では使用できず、特別な場所を用い
る必要があった。また、背景メモリを使用した方式では
この欅な特殊な場所は必要ではないが、背景メモリに背
景画像を取り込んだ時点との環境の変化に弱（、とりわ
け物体と背景との境界部分において劣化が生じると言っ
た問題点があった。In the conventional technology, in order to use such a special background, it could not be used in a normal office, and a special place had to be used. In addition, although the method using background memory does not require this special location, it is vulnerable to changes in the environment from the time the background image is imported into the background memory (especially deterioration at the boundary between the object and the background). There were problems that were said to occur.
本発明は、この問題を解決するために、物体の領域を限
定し、背景・物体を含む画像信号から背景を除去し、物
体を抽出し、物体のみの画像を得る装置を提供すること
を目的としている。In order to solve this problem, the present invention aims to provide an apparatus that limits the area of the object, removes the background from an image signal containing the background/object, extracts the object, and obtains an image of only the object. It is said that
第１図は１本発明の詳細な説明図であり、背景とその前
面に位置している物体および物体抽出装置の構成を示す
配置を表している。１１は背景。FIG. 1 is a detailed explanatory diagram of the present invention, and shows a background, an object located in front of the background, and an arrangement showing the configuration of the object extraction device. 11 is the background.
１２は背景の前面に位置する物体、１３は不可視光源又
は変調された光を発する変調光源、１４は撮像装置であ
る。12 is an object located in front of the background; 13 is an invisible light source or a modulated light source that emits modulated light; and 14 is an imaging device.
〔作 用〕
先ず第１の発明について説明する。通常のオフィスなど
に於いては、可視光源が用いられており。[Function] First, the first invention will be explained. In normal offices, visible light sources are used.
背景１１および、物体１２は全体的に照らされている。Background 11 and object 12 are entirely illuminated.
このため、撮像装置１４で撮像した場合。Therefore, when the image is captured by the imaging device 14.
可視光源については背景と物体とは同時に撮像される。For visible light sources, the background and object are imaged simultaneously.
一方１例えば紫外線のような不可視な光線は存在してお
らず、特別な光源無しでは撮像装置１４では、不可視光
源については、何も撮像することができない。不可視光
源１３により、物体１２を照射すると、物体１２のみが
不可視光線に照らされ、撮像袋２１４で撮像される。こ
の結果。On the other hand, there are no invisible light rays such as ultraviolet rays, and the imaging device 14 cannot image any invisible light source without a special light source. When the object 12 is irradiated by the invisible light source 13, only the object 12 is illuminated by the invisible light and is imaged by the imaging bag 214. As a result.
不可視光線に対しては、物体１２のみが撮像され。For invisible light, only the object 12 is imaged.
背景１１は撮像されない。撮像装置１４は、可視光線と
不可視光線の両者を取り扱える必要がある。Background 11 is not imaged. The imaging device 14 needs to be able to handle both visible light and invisible light.
その構成を第２図で示す。Its configuration is shown in FIG.
第２図は、可視光線と不可視光線との両者を取り扱える
撮像装置の一構成例である。２１は対物レンズ、２２は
入力光線をある比率で分配するマジックミラー、２３は
可視光線にのみ反応する可視光線用カメラ、２４は不可
視光線にのみ反応する不可視光線用カメラ、２５は不可
視光線用カメラから出力された。物体の撮像されている
領域を抽出する物体領域抽出部、２６は物体領域抽出部
で抽出された物体領域を用いて、可視光線用カメラ２３
の出力を制御する物体抽出部である。FIG. 2 shows an example of the configuration of an imaging device that can handle both visible light and invisible light. 21 is an objective lens, 22 is a magic mirror that distributes input light at a certain ratio, 23 is a visible light camera that responds only to visible light, 24 is an invisible light camera that responds only to invisible light, and 25 is a camera for invisible light. was output from. An object region extraction section 26 extracts an imaged region of the object, and the visible light camera 23 uses the object region extracted by the object region extraction section.
This is an object extraction unit that controls the output of
普通のオフィスなどの環境で照明に用いられている可視
光線と、物体を抽出するために用意された不可視光線と
の両者は、対物レンズ２１を通して、撮像装置内に入る
。対物レンズ２１を通った光線はマジックミラー２２に
より、２つに分岐され可視光線用カメラ２３と不可視光
線用カメラ２４とに到達する。可視光線用カメラ２３で
は抽出処理に備え、背景と物体との両者を撮像する。Both visible light, which is used for illumination in an environment such as an ordinary office, and invisible light, which is prepared for extracting objects, enter the imaging device through the objective lens 21. The light beam passing through the objective lens 21 is split into two by a magic mirror 22 and reaches a camera 23 for visible light and a camera 24 for invisible light. The visible light camera 23 images both the background and the object in preparation for extraction processing.
不可視光線用カメラ２４では、不可視光線で照射された
物体のみを撮像する。物体領域抽出部２５では、不可視
光線用カメラ２４で撮像された物体の領域のみを１例え
ば２ｉｔＬ化処理を行うことにより抽出する。物体抽出
部２６では、物体領域抽出部２５の出力で物体領域であ
ると判定された画素について、可視光線用カメラ２３か
らの入力を出力することにより、物体の抽出処理を行う
。The invisible light camera 24 images only objects irradiated with invisible light. The object region extracting unit 25 extracts only the region of the object imaged by the invisible light camera 24 by performing 1, for example, 2 it L processing. The object extraction section 26 performs object extraction processing by outputting the input from the visible light camera 23 for pixels determined to be object regions based on the output of the object region extraction section 25.
以上の構成において、マジックミラー２２．可視光線用
カメラ２３．不可視光線用カメラ２４の配置は、一画素
の精度で対応づけを行い得るよう構成することが望まれ
る。物体領域抽出部２５は例えば、あらかじめ定められ
た闇値を越える画素については物体領域とみなし、闇値
に達しないものは背景領域とみなすような２値化処理に
より構成される。物体抽出部２６は例えば、物体領域抽
出部２５で物体領域であると判定された画素に対しては
、可視光線用カメラ２３からの入力信号をそのまま出力
し、物体領域抽出部２５で背景領域であると判定された
画素については、背景を表す特定の信号を出力するとい
うようなマスク処理により構成される。In the above configuration, the magic mirror 22. Visible light camera 23. It is desirable that the arrangement of the invisible light camera 24 be configured so that the correspondence can be made with one pixel precision. The object region extraction unit 25 is configured, for example, by a binarization process in which pixels exceeding a predetermined darkness value are regarded as object regions, and pixels that do not reach the darkness value are regarded as background regions. For example, the object extraction unit 26 outputs the input signal from the visible light camera 23 as is for a pixel determined to be an object area by the object area extraction unit 25, and the object area extraction unit 25 extracts the input signal from the background area. For pixels determined to be present, mask processing is performed such as outputting a specific signal representing the background.
次に第２の発明について説明する０通常のオフィスなど
に於いて用いられている光源は時間的に変調されておら
ず一定の強度で背景１１および物体１２を照射している
。ここで変調光を発する変調光源１３を、物体１２のみ
を照らすように配置した場合、背景１１は非変調光源の
みにより照らされており、物体１２は非変調光源と変調
光源１３の両者により照らされることになる。撮像装置
１４で撮像された映像信号には背景１１と物体１２が同
時に存在しており、物体１２から反射され、撮像装置１
４で撮像された物体を表している映像信号は変調光源に
よる変調成分を有しており。Next, the second invention will be explained.The light source used in ordinary offices and the like is not temporally modulated and illuminates the background 11 and the object 12 with a constant intensity. When the modulated light source 13 that emits modulated light is arranged so as to illuminate only the object 12, the background 11 is illuminated only by the non-modulated light source, and the object 12 is illuminated by both the non-modulated light source and the modulated light source 13. It turns out. The background 11 and the object 12 are simultaneously present in the video signal captured by the imaging device 14, and the video signal is reflected from the object 12 and transmitted to the imaging device 1.
The video signal representing the object imaged in step 4 has a modulated component due to the modulated light source.
背景１１を表す映像信号は変調成分を有していないとい
う特徴がある。変調成分のみを映像信号から分離するこ
とは、可変増幅度を有する増幅装置と低域通過フィルタ
を使用することにより構成される。その構成を第３図に
示す。また第２図の各部の波形を第４図に示す。The video signal representing the background 11 is characterized in that it does not have a modulation component. Separating only the modulation component from the video signal is achieved by using an amplifier with variable amplification and a low-pass filter. Its configuration is shown in FIG. Further, waveforms at various parts in FIG. 2 are shown in FIG. 4.
第３図は変調光源、可変増幅度を有する増幅装置と低域
通過フィルタとを具備する撮像装置の一構成例である。FIG. 3 shows an example of the configuration of an imaging device including a modulated light source, an amplifier with variable amplification, and a low-pass filter.
１２１は変調光源を変調する周波数を発する発振器、１
２２は発振器１２１で発振された周波数で変調光源を駆
動する変調光源制御装置。121 is an oscillator that emits a frequency that modulates a modulated light source;
22 is a modulated light source control device that drives the modulated light source at the frequency oscillated by the oscillator 121;
１２３は変調光源制御装置１２２により駆動され変調光
を発する変調光源、１２４は物体などにより反射された
変調光源１２３の発した変調光を撮影する撮像装置、１
２５は発振器１２１で発振された周波数で変調光源１２
３と同期した可変増幅度を有する可変増幅度増幅装置、
１２６は可変増幅度増幅装置１２５で増幅された映像信
号の変調成分を除去する低域通過フィルタである。123 is a modulated light source that is driven by the modulated light source control device 122 and emits modulated light; 124 is an imaging device that photographs the modulated light emitted by the modulated light source 123 reflected by an object; 1;
25 is a modulated light source 12 at a frequency oscillated by an oscillator 121.
a variable amplification amplifier device having a variable amplification degree synchronized with 3;
Reference numeral 126 denotes a low-pass filter that removes the modulation component of the video signal amplified by the variable amplification device 125.
第４図は変調光源、可変増幅度を有する増幅装置と低域
通過フィルタとを具備する撮像装置の一構成例の各部の
波形の説明図である。第４図（Ａ）は可変増幅度増幅装
置１２５の入力波形、第４図（Ｂ）は低域通過フィルタ
１２６の入力波形、第４図（Ｃ）は低域通過フィルタ１
２６の出力波形を表している。１３１は強度軸、１３２
は時間軸、１３３は可変増幅度増幅装置１２５０入力に
含まれる変調光源からの寄与分を表す変調光源成分、１
３４は可変増幅度増幅装置１２５の入力に含まれる非変
調光源からの寄与分を表す非変調光源成分、１３５は低
域通過フィルタの入力に含まれる非変調光源成分。FIG. 4 is an explanatory diagram of waveforms of various parts of an example of the configuration of an imaging device including a modulated light source, an amplifier device with variable amplification, and a low-pass filter. 4(A) shows the input waveform of the variable amplification device 125, FIG. 4(B) shows the input waveform of the low-pass filter 126, and FIG. 4(C) shows the input waveform of the low-pass filter 1.
26 output waveforms are shown. 131 is the strength axis, 132
is a time axis, 133 is a modulated light source component representing the contribution from the modulated light source included in the input of the variable amplification device 1250, 1
34 is a non-modulated light source component representing the contribution from the non-modulated light source included in the input of the variable amplification device 125, and 135 is a non-modulated light source component included in the input of the low-pass filter.
１３６は低域通過フィルタの入力に含まれる変調光源成
分、１３７は低域通過フィルタの出力に含まれる変調光
源成分、１３８は低域通過フィルタの出力に含まれる非
変調光源成分である。136 is a modulated light source component included in the input of the low-pass filter, 137 is a modulated light source component included in the output of the low-pass filter, and 138 is a non-modulated light source component included in the output of the low-pass filter.
第３図、第４図について説明する。変調された変調光を
発する変調光源１２３は発振器１２１により発生された
周波数に同期し、変調光源制御装置１２２により制御さ
れ変調された光を発する。第１図における物体１２は変
調光源１２３により発せられた変調光と普通のオフィス
などで照明に用いられている非変調光の両者により照ら
され１両者の成分を反射し撮像袋Ｎ１２４により撮像さ
れる。第１図に於ける背景１１は普通のオフィスなどで
照明に用いられている非変調光のみにより照射され。3 and 4 will be explained. A modulated light source 123 that emits modulated light is synchronized with the frequency generated by the oscillator 121, and is controlled by a modulated light source control device 122 to emit modulated light. The object 12 in FIG. 1 is illuminated by both the modulated light emitted by the modulated light source 123 and the unmodulated light used for lighting in ordinary offices, etc., and the components of both are reflected and imaged by the imaging bag N124. . The background 11 in FIG. 1 is illuminated only by unmodulated light, which is used for lighting in ordinary offices.
非変調光成分のみを反射し、撮像装置１２４により撮像
される。該撮像された映像信号の様子を第４図（Ａ）に
示す。第４図（Ａ）では変調光と非変調光の両者により
照射されている映像信号が示されている。非変調光成分
が除去され、変調光成分のみが抽出される様子は物体１
２から反射された光線成分に対しても、背景１１から反
射された光線成分に対しても同一であるので、以下物体
１２から反射された光線成分についてのみ説明を行う。Only the non-modulated light component is reflected and imaged by the imaging device 124. The state of the imaged video signal is shown in FIG. 4(A). FIG. 4A shows a video signal illuminated by both modulated light and non-modulated light. Object 1 shows how the non-modulated light component is removed and only the modulated light component is extracted.
Since the same applies to the light beam component reflected from the object 2 and the light beam component reflected from the background 11, only the light beam component reflected from the object 12 will be described below.
撮像装置１２４により撮像された映像信号には第４図（
Ａ）のように変調光源成分と非変調光源成分との両者が
混在している。該映像信号から非変調光源成分を除去し
、変調光源成分のみを抽出することにより、物体抽出を
行うために、該映像信号は発振器１２１で発振され、変
調光源制御装置１２２に供給されている周波数と同期し
かつ増幅度を可変する可変増幅度増幅装置１２５により
増幅される。The video signal captured by the imaging device 124 is shown in FIG.
As shown in A), both the modulated light source component and the non-modulated light source component coexist. In order to perform object extraction by removing the non-modulated light source component from the video signal and extracting only the modulated light source component, the video signal is oscillated by the oscillator 121 and is supplied to the modulated light source control device 122. The signal is amplified by a variable amplification amplification device 125 that synchronizes with the amplification rate and varies the amplification degree.
可変増幅度増幅装置１２５の増幅度は、第４図（Ａ）の
変調光源成分１３３の強度の強いときには小さな増幅度
となり、変調光源成分１３３の強度の小さなときには大
きな増幅度となり、低域通過フィルタ１２６の入力に於
ける非変調光源成分１３５が一定の強度を保つようにそ
の増幅度を発振器１２１に同期し可変する。このように
発振器１２１の出力に同期した増幅度を有する可変増幅
度増幅装置１２５で増幅された結果、可変増幅度増幅装
置１２５の入力の変調光源成分１３３は低域通過フィル
タ１２６の入力においては図示１３６のように時間によ
って変化しないものとなり、一方可変増幅度増幅装置１
２５の入力の非変調光源成分１３４は低域通過フィルタ
１２６の入力においては図示１３５のように時間によっ
て変化するものとなる。低域通過フィルタ１２６ノ入力
中の時変成分即ち非変調光源成分１３５を除去するため
に低域通過フィルタ１２６を使用し１時変成分の低減を
行う０時変成分即ち非変調光源成分の低減が行われた結
果である低域通過フィルタ１２６の出力信号は第４図（
Ｃ）となり、変調光源成分１３７は低域通過フィルタ入
力の大きさを保ち。The amplification degree of the variable amplification amplification device 125 becomes small when the intensity of the modulated light source component 133 in FIG. The amplification degree of the non-modulated light source component 135 at the input of the oscillator 126 is varied in synchronization with the oscillator 121 so as to maintain a constant intensity. As a result of being amplified by the variable amplification amplifier 125 having an amplification degree synchronized with the output of the oscillator 121, the modulated light source component 133 at the input of the variable amplification amplifier 125 is not shown at the input of the low-pass filter 126. 136, which does not change with time, while the variable amplification amplifier 1
At the input of the low-pass filter 126, the unmodulated light source component 134 at the input 25 changes with time as shown at 135 in the figure. The low-pass filter 126 is used to remove the time-varying component, ie, the non-modulated light source component 135, which is input to the low-pass filter 126. 1 Reduction of the time-varying component, ie, the non-modulated light source component The output signal of the low-pass filter 126, which is the result of this, is shown in Figure 4 (
C), and the modulated light source component 137 maintains the magnitude of the low-pass filter input.
非変調光源成分１３８は低域通過フィルタにより低減さ
れる。このように低域通過フィルタ１２６の出力には撮
像装置１２４の出力に含まれている変調光源成分のみが
出現するので、第１図背景１１には変調光線を照射せず
、物体１２には変調光線を照射することにより背景と物
体の混在した画像信号から物体のみの抽出を行うことが
可能となる。The unmodulated light source component 138 is reduced by a low pass filter. In this way, only the modulated light source component included in the output of the imaging device 124 appears in the output of the low-pass filter 126, so the background 11 in FIG. By irradiating the light beam, it becomes possible to extract only the object from an image signal containing a mixture of the background and the object.
以上説明したように９本発明によれば、特殊な光源によ
り対象物体を照射することにより、物体と背景とを分離
することが可能となる。なお、第１の発明における第２
図に示したような撮像装置は、撮像装置組立時に精度良
（構成しておけば。As explained above, according to the present invention, by irradiating the target object with a special light source, it is possible to separate the object and the background. Note that the second invention in the first invention
An imaging device like the one shown in the figure has good accuracy (if configured) when the imaging device is assembled.
以後調整の必要がない、また、不可視光線による対象物
体の照射は、物体領域抽出部が例えば２値化処理により
構成されるので、厳密な調整が必要なく、２値化で物体
と背景が分離できる程度の精度があれば良い。更に第２
の発明の場合には、変調周波数については普通のオフィ
スなどで用いるのであれば人間に近く知覚されないフリ
ッカ−以上に設定すればよく、また人間に影響を与えな
い工場内の様な特殊な環境において運用するのであれば
全く任意に選択することが可能である。There is no need for further adjustment.Also, since the object region extraction section is configured by, for example, binarization processing when irradiating the target object with invisible light, there is no need for strict adjustment, and the object and background can be separated by binarization. It is good as long as it is as accurate as possible. Furthermore, the second
In the case of the invention described above, the modulation frequency should be set at a level higher than flicker, which is close to human perception when used in a normal office, and in a special environment such as a factory where it does not affect humans. If you want to use it, you can select it completely arbitrarily.
第１図は本発明の詳細な説明図、第２図は可視光線と不
可視光線との両者を取り扱える撮像装置の一構成例、第
３図は第２の発明の場合の撮像系の一構成例、第４図は
撮像系の一構成例の各部の波形の説明図である。
１１・・・背景、１２・・・背景の前面に位置する物体
。
１３・・・不可視光源又は変調光源、１４・・・撮像装
置２１・・・対物レンズ、２２・・・マジックミラー
２３・・・可視光線用カメラ、２４・・・不可視光線用
カメラ２５・・・物体領域抽出部、２６・・・物体抽出
部、１２１・・・発振器、１２２・・・変調光源制御装
置、１２３・・・変調光源、１２４・・・撮像装置、１
２５・・・可変増幅度増幅装置、１２６・・・低域通過
フィルタ、１３１・・・強度軸。
１３２・・・時間軸、１３３・・・変調光源成分、１３
４・・・非変調光源成分、１３５・・・非変調光源成分
、１３６・・・変調光源成分、１３７・・・変調光源成
分、１３８・・・非変調光源成分。
特許出願人 日本電信電話株式会社FIG. 1 is a detailed explanatory diagram of the present invention, FIG. 2 is an example of the configuration of an imaging device that can handle both visible light and invisible light, and FIG. 3 is an example of the configuration of an imaging system in the case of the second invention. , FIG. 4 is an explanatory diagram of waveforms of each part of an example of the configuration of the imaging system. 11...Background, 12...Object located in front of the background. 13... Invisible light source or modulated light source, 14... Imaging device 21... Objective lens, 22... Magic mirror
23... Camera for visible light, 24... Camera for invisible light 25... Object area extraction section, 26... Object extraction section, 121... Oscillator, 122... Modulated light source control device, 123 ...Modulated light source, 124...Imaging device, 1
25...Variable amplification amplifier, 126...Low pass filter, 131...Intensity axis. 132... Time axis, 133... Modulated light source component, 13
4... Non-modulated light source component, 135... Non-modulated light source component, 136... Modulated light source component, 137... Modulated light source component, 138... Non-modulated light source component. Patent applicant Nippon Telegraph and Telephone Corporation
Claims (2)
置において、可視ではない光線を発生する光源を有し、
該不可視光線によって、背景と物体とのいずれか一方の
みが照射されることにより、背景・物体を含む画像信号
から物体を抽出することを特徴とする物体抽出装置。(1) A device for extracting objects located in front of the background, which has a light source that generates invisible light,
An object extraction device characterized in that an object is extracted from an image signal including a background and an object by irradiating only one of the background and the object with the invisible light beam.
置において、変調した光源を照射する手段を有し、物体
と背景とのいずれか一方に対し変調した光線を照射する
ことにより、背景・物体を含む画像信号から物体を抽出
することを特徴とする物体抽出装置。(2) A device for extracting an object located in front of a background, which has means for irradiating a modulated light source, and by irradiating either the object or the background with the modulated light beam, - An object extraction device characterized by extracting an object from an image signal containing the object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2157165A JPH0447871A (en) | 1990-06-15 | 1990-06-15 | Object extraction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2157165A JPH0447871A (en) | 1990-06-15 | 1990-06-15 | Object extraction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0447871A true JPH0447871A (en) | 1992-02-18 |
Family
ID=15643611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2157165A Pending JPH0447871A (en) | 1990-06-15 | 1990-06-15 | Object extraction device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0447871A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0797351A1 (en) * | 1996-03-18 | 1997-09-24 | Nippon Television Network Corporation | Picture replacement system and method |
| EP0809408A1 (en) * | 1996-05-24 | 1997-11-26 | THOMSON multimedia | Special effects camera |
| WO1999051023A1 (en) * | 1998-03-29 | 1999-10-07 | 3Dv Systems, Ltd. | Teleconferencing system |
| JP2009060162A (en) * | 2007-08-29 | 2009-03-19 | Fujikura Ltd | Object photographing method and device |
| WO2016076328A1 (en) * | 2014-11-10 | 2016-05-19 | 株式会社ニコン | Light detection device, image-capturing device, and image-capturing element |
-
1990
- 1990-06-15 JP JP2157165A patent/JPH0447871A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0797351A1 (en) * | 1996-03-18 | 1997-09-24 | Nippon Television Network Corporation | Picture replacement system and method |
| EP0809408A1 (en) * | 1996-05-24 | 1997-11-26 | THOMSON multimedia | Special effects camera |
| FR2749116A1 (en) * | 1996-05-24 | 1997-11-28 | Thomson Multimedia Sa | CAMERA WITH SPECIAL EFFECTS |
| US6124887A (en) * | 1996-05-24 | 2000-09-26 | Thomson Licensing S.A. | Specal effects camera and system including such a camera |
| WO1999051023A1 (en) * | 1998-03-29 | 1999-10-07 | 3Dv Systems, Ltd. | Teleconferencing system |
| JP2009060162A (en) * | 2007-08-29 | 2009-03-19 | Fujikura Ltd | Object photographing method and device |
| WO2016076328A1 (en) * | 2014-11-10 | 2016-05-19 | 株式会社ニコン | Light detection device, image-capturing device, and image-capturing element |
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