WO2005088966A1 - Procede de substitution pour la modification d'un programme tv numerique - Google Patents
Procede de substitution pour la modification d'un programme tv numerique Download PDFInfo
- Publication number
- WO2005088966A1 WO2005088966A1 PCT/CN2005/000299 CN2005000299W WO2005088966A1 WO 2005088966 A1 WO2005088966 A1 WO 2005088966A1 CN 2005000299 W CN2005000299 W CN 2005000299W WO 2005088966 A1 WO2005088966 A1 WO 2005088966A1
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- WIPO (PCT)
- Prior art keywords
- head
- character
- replaced
- digital
- image
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
- H04N7/165—Centralised control of user terminal ; Registering at central
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/21805—Source of audio or video content, e.g. local disk arrays enabling multiple viewpoints, e.g. using a plurality of cameras
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
Definitions
- the present invention relates to a method for replacing a character head of a digital video program, and more particularly, to a method for replacing a character head of a digital video program, and in particular, by inputting it to a computer or other image processing device according to a user's wishes
- the multi-angle two-dimensional plane or three-dimensional three-dimensional still digital image information or image digital model of the character's head to be replaced can be obtained by using a pixel matching algorithm in the mathematical transformation matching algorithm, such as critical point filtering (English full name is Critical Point Filter (CPF for short) algorithm to determine the character that can be replaced in the original video program from the original still digital image or digital image model of the character's head to the actual image of the character's head in each frame of the video program
- CPF Critical Point Filter
- the present invention is to provide a method for replacing a character head of a digital video program.
- the method is to input multiple characters to be replaced to a computer or other image processing device.
- CPF algorithm critical point filtering algorithm
- image processing such as stepless scaling, angle and brightness chroma adjustment, contour processing, etc.
- the digital image information of the character that can be replaced in the original video program works can be easily and quickly fitted to the digital image information of another replacement character (also called the object character) according to the user ’s wishes, and the replacement
- the character has a head posture and a facial expression consistent with the replaced character in the original video program work.
- This method uses multiple digital still image information or image models of different angles of characters that can be replaced in a video program work, by using a pixel matching algorithm in a mathematical transformation matching algorithm, such as critical point filtering (full name in English) It is a Critical Point Filter (CPF for short) algorithm and image processing technologies such as stepless scaling, angle and light chroma adjustment, contour processing, and conventional digital image processing software, to obtain that the character head of the replaced character in the video program is in the above multiple frames.
- Still digital image information or image digital models of different angles are continuously rotated between digital images or image digital models of various angles and their corresponding digital image information and image positioning parameters.
- This method uses the digital information of the initial reference image of the character that can be replaced, and uses mathematical transformation matching algorithms and image processing techniques such as stepless scaling, angle and light chroma adjustment, and round library processing to obtain the character that can be replaced.
- the method utilizes multiple pieces of digital image information or image digital models of characters (also called object characters) to be replaced, by using a mathematical transformation matching algorithm and stepless scaling, angle and brightness chroma adjustment, contour processing And other mathematical processing parameters such as image processing technology and conventional digital image processing software, and using the initial reference image of the replaceable character to change to a matching transformation of the actual image of the character ’s head posture and facial expression in the video program,
- the digital image information of the head posture, facial expression, and the like of the character to be replaced and the replaced character in the original video program work are obtained, and image positioning parameters thereof are obtained.
- a method for replacing a character head of a digital video program includes the following steps: a. Obtaining and storing still digital image information of multiple angles of a character head being replaced in a digital video program and determining The step of locating parameters of the digital image of the head of the replaced character; b.
- the dynamic digital images of the head of the replaced character synthesized in the above step b are established with the digital images of the head of the replaced character in each frame of the video program respectively.
- the still digital image information of the multiple angles of the character's head that is replaced or replaced may be two-dimensional flat still digital image information, or three-dimensional three-dimensional still digital image information.
- the continuously changing dynamic digital image of the replaced or replaced character head synthesized in step b or e is the Dynamic digital image information that continuously rotates and infinitely zooms between the digital images of adjacent angles during the replacement or replacement of the character's head. It can also be the digital image of the replaced or replaced character's head generated by digital image processing technology. model.
- the present invention has the following beneficial effects: As a replacement method for a digital video program character head of the present invention, it uses a mathematical transformation matching algorithm and stepless scaling, angle and brightness chroma adjustment, Image processing technologies such as gallery and boundary processing, so you only need to input a computer or other image processor to replace the head posture of the character (also called the object character), the two-dimensional plane or the three-dimensional three-dimensional face expression at multiple angles.
- a computer or other image processor to replace the head posture of the character (also called the object character), the two-dimensional plane or the three-dimensional three-dimensional face expression at multiple angles.
- FIG. 1 is a schematic flowchart of the main steps in a method for replacing a character head of a digital video program according to the present invention.
- FIG. 1 a method for replacing a character head of a digital video program according to the present invention.
- the main steps included in the technical solution adopted to achieve the purpose of the invention are: 'a.
- CPF algorithm a step of synthesizing a dynamic digital image of the replaced character's head continuously rotating from left to right (or vice versa); c.
- a dynamic digital image of the replaced character's head continuously rotated in the above step b A step of establishing a mathematical transformation parameter corresponding to the digital image of the replaced character head in each frame of the video program by using a mathematical transformation codec and a decoder; in step c, a step of establishing a mathematical transformation parameter corresponding to each other
- the method further includes: cl.
- Extracting a frame of a digital image of the replaced character's head from the dynamic digital image of the replaced character's head or multiple digital still images of the replaced character's head is used as the initial state reference image and the head of the replaced character is used
- the reference image of the initial state of the department is specially marked, and stored with the original video program on a storage medium And c2.
- a mathematical transformation matching algorithm such as the CPF algorithm
- digital image processing technology and software for adjusting the image angle are used to pass the dynamic digital image of the head of the replaced character through three steps.
- the specific implementation can be performed in the following order:
- a mathematical transformation matching algorithm (such as a CPF algorithm) is used to adjust the angle of the dynamic digital image of the replaced character's head generated in step b left and right to make it conform to the Digital animation program in the n-th frame of the replaced head image of the left and right rotation angle, the digital image pnl is recorded;
- step c Use image processing software (such as photoshop software) to adjust the horizontal rotation angle of the head image pn2 of the replaced character so that it conforms to the horizontal rotation of the head image of the replaced character in the n-th frame of the digital animation program.
- the angle of the posture, the digital image pn3 is recorded; thereby obtaining a digital image that is consistent with the angle of the rotational posture of the digital image of the head of the replaced character in the n-th frame of the digital video program in the three dimensions pn3.
- step c the step of establishing corresponding mathematical transformation parameters further includes: c3.
- the mathematical transformation decoder using a mathematical transformation matching algorithm and stepless scaling, brightness and chroma adjustment, etc.
- Digital image processing technology and software establish the size, brightness, chromaticity, posture, and expression of the digital image of the frame captured in step c2 above and the digital image of the replaced character's head in the nth frame of the video program.
- the stepless scaling function of the mathematical transformation matching algorithm (such as the CPF algorithm) is used to adjust the size of the digital image pn3 of the character head replaced by the frame generated in the above step c2 to make it Adjusting and changing the digital image pn4 to match the size of the head image of the replaced character in the n-th frame of the digital animation program, recording the digital image pn4 and the mathematical transformation parameters of the size from the image pn3 to the image pn4;
- step c2 Use image processing software (such as photoshop software) to adjust the brightness of the digital image pn4 to conform to the design concept of the brightness of the head image of the replaced character in the n-th frame of the digital animation program, so as to finally obtain
- the mathematical transformation parameters of the digital image pn3 of the frame generated in the above step c2 are changed to the size, brightness, chromaticity, posture, and expression of the digital image of the head of the replaced character in the nth frame of the digital animation program, and step c2 is determined
- This frame generated by the replacement is replaced by the position parameter corresponding to the overall and local (five features) image positioning parameters of the digital image pn3 on the character's head in the n-th frame of the digital animation program.
- the step of establishing corresponding mathematical transformation parameters further includes:
- step C 4 In the mathematical transformation decoder, use the mathematical transformation matching algorithm and conventional digital image processing software (digital image processing software that can adjust and rotate the angle of the digital image plane) to the digital image of the frame captured in step c2 above. Compare with the initial state reference image determined in step cl, and establish the digital image of the replaced character's head in the frame digital image and the initial state reference image. The step of changing the mathematical transformation parameters of the three-dimensional angle changes corresponding to the digital images of the character's head.
- conventional digital image processing software digital image processing software that can adjust and rotate the angle of the digital image plane
- the specific implementation thereof may be:
- a mathematical transformation matching algorithm such as a CPF algorithm
- conventional digital image processing software variant digital image processing software that can adjust and rotate the angle of a digital image plane, such as software such as photoshop, illustrator, etc.
- step c the step of establishing corresponding mathematical transformation parameters further includes: according to the foregoing technical solution and steps, from the first frame to the last frame of the video program (that is, the video program 1 frame to the n-th frame) step of establishing corresponding mathematical transformation parameters on a frame-by-frame basis; comparing the created digital image of the replaced character head with the video program (digital animation program) in each frame of the replaced character head
- the mathematical transformation parameters corresponding to the digital images of each department are stored in a storage medium together with the original video program according to the serial number of each frame of the video program (digital animation program).
- Each character completes the steps of establishing corresponding mathematical transformation parameters separately or simultaneously; and
- the steps of obtaining and storing multiple digital still image information of the head of the replacement character and determining the digital image positioning parameters of the head of the replacement character for example, using various digital camera equipment (such as a digital camera) (Digital cameras, digital cameras, digital scanners, etc.) to obtain a front digital photo of the replacement character's head at the same size ratio and same head-up normal expression as the replaced character's head in step a, with a few left and right sides each Several digital photos at different angles (for example, one for each of the left and right sides at 45 degrees and two for each), and determine the digital image between the front of the character ’s head and the left and right sides
- the angle parameters of the head rotation 45 degrees interval between each sheet), the overall contour of the front image and the position coordinate parameters of the facial features, and the set of digital images and the determined parameters are stored in the storage medium; e.
- Step d Multi-angle still digital images (digital photos) of the replacement character's head obtained and stored are synthesized in a mathematical transformation encoder through a mathematical transformation matching algorithm (such as the CPF algorithm) from left to right (or vice versa) Steps of continuously rotating a changing dynamic digital image; f.
- a mathematical transformation matching algorithm such as the CPF algorithm
- the mathematical transformation codec and decoder replace the digital image information of the character head synthesized in step e with the digital image signal.
- Information using the digital image positioning parameters of the replaced character and the head of the replacement character determined in steps a and d and the mathematical transformation parameters established in step c, to generate a mathematical transformation with each frame of the video program through a mathematical transformation matching algorithm.
- the digital image of the head of the replaced character corresponds to a matching replacement image, and the character replacement step is performed.
- the processing step regarding the character replacement further includes: fl, extracting the storage record in the above step cl in the storage medium.
- the initial state reference image of the head of the replaced character in the image and extracting a frame from the dynamic digital image of the head of the replaced character through three-dimensional angle adjustment to match the initial state reference image of the head of the replaced character
- the digital image determine the digital image as the initial state reference image of the replacement character's head, and refer to the size, brightness, posture, expression of the digital image, and the positioning parameters of the overall and partial image of the replacement character's head
- the reference image of the initial state of the head of the replaced character is calibrated and corrected,
- the calibration and the correction parameter extracting step and stored in the storage medium specific embodiment the following steps may be performed sequentially: (1) Extracting the initial state reference image of the head of the replaced character stored in the storage medium and recorded in step cl;
- the replacement character head obtained from step e using the mathematical transformation matching algorithm (such as the CPF algorithm) and the digital image processing technology and software that adjusts the image angle from left to right (or On the contrary, a digital image tr that matches the initial state reference image of the head of the character being replaced is extracted from the digital images that are continuously rotated and changed.
- the mathematical transformation matching algorithm such as the CPF algorithm
- the digital image processing technology and software that adjusts the image angle from left to right
- the angles of the two dimensions should be consistent with the angles of the three dimensions of the initial state reference image of the replaced character's head), and the digital image tr is determined as the initial state reference image of the replaced character's head, and the specificity of the digital image tr is
- the generating step is the same as the specific generating step of the digital image pn3 described in step c2, and details are not described herein again;
- stepless scaling function of the mathematical transformation matching algorithm such as the CPF algorithm
- the conventional digital image processing software (such as photoshop software) is used to adjust the brightness of the digital image tr so that the adjustment changes to the brightness of the reference image of the initial state of the character head replaced in step cl above.
- a mathematical transformation matching algorithm (such as a CPF algorithm) and an initial state reference image of the replaced character head and the digital image trc are used to determine a change from the digital image trc to the replaced character head.
- the initial state reference image generates a replacement image consistent with the angles of the three dimensions of the head image of the replaced character in the above-mentioned video program (digital animation program) and corrects the replacement image as a whole and partly (five features).
- Parameter step; ⁇ in the mathematical transformation encoder, using the above-mentioned step c3
- the mathematical transformation parameters of the vertical size, brightness, attitude, and expression, as well as the calibration and correction parameters stored in step fl, are matched by the mathematical transformation matching algorithm in step n with the video program (digital animation program) in the nth frame.
- the replacement image whose three-dimensional angles of the head image of the replaced character are consistent with each other is matched with the size, brightness, posture, and expression of the head image of the replaced character in the video program (digital animation program).
- a step of replacing the image and correcting the positioning parameters of the entire and partial (five features) images of the replacement image; f4, using the replacement image generated in the step and the positioning parameters of the whole and partial (five features) image of the modified image, and determining in step c3 A step of replacing the replaced character in the frame with the position parameter corresponding to the positional parameter of the entire and partial (five features) digital image of the head of the replaced character in the n-th frame of the video program (digital animation program).
- the processing step related to role replacement further includes: Using conventional digital image contour and boundary processing techniques and software to perform image contour boundary and occlusion processing steps for the generated replacement image of the replacement character's head and the corresponding background in the video program; according to the above technical solutions and steps Steps of performing a character image replacement process frame by frame from the first frame to the last frame of the video program (that is, the first frame to the nth frame of the video program); using the above technical solution and steps, Each character completes the replacement step or the replacement step at the same time.
- the steps of replacing and transforming the two-dimensional digital image or replacing and transforming the three-dimensional digital image are examples of the steps of replacing and transforming the two-dimensional digital image or replacing and transforming the three-dimensional digital image.
- Steps of performing sequential playback on the display through a storage medium storing the video program after the character replacement is completed the video program after the character replacement may also be stored first and reserved for later playback.
- the implementation steps of the method for replacing a character head of a digital video program of the present invention are all completed.
- the multiple-angle still digital image information of the replaced character head obtained and stored in step a may be from the original digital video program or from other digital video programs with the replaced character image. Multiple still digital images at different angles of the head of the replaced character are selected and intercepted according to the needs; it may also be a variety of digital image equipment, such as digital video cameras, digital cameras, digital scanners and other devices for the replaced character.
- the multiple-angle still digital image information of the replacement character's head described in step d above may be the replacement character selected and intercepted from the digital video program with the replacement character image as required
- Multiple still digital images at different angles of the head can also be taken and taken by various digital image devices, such as digital video cameras, digital cameras, digital scanners and other devices, to replace multiple characters at different angles Or it can be obtained by scanning and interception or selection. It can also be still digital image information generated by computer-generated or hand-drawn multiple angle portraits of the replacement character's head.
- the multiple-angle still digital image information of the character head that is replaced or replaced may be the front, back, left, and right of the head obtained by the replaced or replaced character head in the head-up state. Still digital image information at various angles; or digital still image information at the front, back, left, and right angles of the head obtained by the head of the character being replaced or replaced in the top and bottom views. If the above-mentioned static digital image information of multiple angles of the character head to be replaced or replaced is intended to be obtained by digital camera equipment, it is recommended but not limited to head-up shooting records under normal lighting conditions.
- Digital images with multiple angles of the face in a normal expression posture (no expressions and no postures), from the left side to the front to the right side of not less than seven frames, the sides behind and the front behind no less than three frames, the top surface No less than one frame, take this as the digital information of the still digital image of the character's head at multiple angles, and try to make the illumination brightness and shooting mode of the digital still image of the character's head at different angles as much as possible.
- Which includes the head posture and facial expression of the replacement character when shooting), the shooting angle and focal length, and the distance of the shooting distance are the same as when taking still digital images of the replaced character's head at multiple angles.
- the still digital image information of multiple angles of the character's head that is replaced or replaced may be two-dimensional flat still digital image information or three-dimensional three-dimensional still digital image. information.
- the determined digital image positioning parameters of the head of the character to be replaced or replaced Refers to: (1) Positioning parameters of the digital image of the whole or part of the head of the character being replaced or replaced, such as the digital image of the whole or part of the head of the character being replaced or replaced (including the figure of the entire head and the features of the facial features) Image) coordinate parameters of the positioning contour curve and the positioning point; (2), the positioning parameters of the relative positions between the digital images of the character head with multiple angles that are replaced or replaced, in short, the different deflection angles
- the continuously changing dynamic digital image of the head of the replaced or replaced character is the continuous rotation and stepless scaling of the head of the replaced or replaced character between the digital images of various adjacent angles.
- Dynamic digital image information; or an image digital model of the replaced or replaced character head generated by using digital image processing technology the image digital model is a bright color of the digital image of the replaced or replaced character head
- Digital image processing technologies such as adjustment generate digital image models that only have the contour lines of the entire or part of the head of the character being replaced or replaced (including the entire head and individual features).
- the present invention uses such image digital models, which is not only beneficial to simplifying the character
- the replacement step between images facilitates the acquisition of the digital image positioning parameters of the head of the character being replaced and replaced, and the mathematical transformation parameters therebetween, and makes the fitting replacement more accurate, and the digital video program works after replacement are smoother, lifelike.
- the mathematical transformation matching algorithm in steps 13, e, and f above is a pixel matching algorithm.
- the pixel matching algorithm may be a critical point filtering (Critical Point Filter in English) algorithm, which is referred to as a CPF algorithm for short.
- the critical point filtering (CPF) algorithm is a pixel matching algorithm that can transform still images into dynamic images. This method can use several still digital images of an object to generate the object continuously between several still digital images.
- the mathematical transformation parameters of the image are extracted and applied to other similar
- a still digital image of the object preferably a front still digital image whose size, color, brightness, and color are consistent with the original object under the standard state of no expression and no posture, so that the still digital of the similar object
- the image follows the original object's image change trajectory defined by the mathematical transformation function (which includes three dimensions of the digital image: angle change, size change, brightness chroma change, especially the trajectory of attitude and expression changes).
- the critical point filtering (CPF) algorithm is an existing technology, and its detailed and detailed transformation method and functional principle are not described herein again.
- the storage medium for storing digital image information and mathematical transformation parameters in the steps may be a magnetic disk, or a magnetic tape, or an optical disk, or other electronic storage device.
- the method for replacing a character head of a digital video program according to the present invention can be widely used in the production of various multimedia video programs, animations and other video programs and after production.
- the method for replacing a character head of a digital video program according to the present invention can be widely applied to T / CN2005 / 000299
- the specific implementations mentioned above are only some of the preferred implementations of the present invention.
- the specific implementation and application scope of the present invention cannot be limited by them, that is, the equal changes and modifications made in accordance with the scope of the claims of the present invention , Shall all fall within the protection scope of the invention patent.
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- Engineering & Computer Science (AREA)
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- Processing Or Creating Images (AREA)
Description
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Application Number | Priority Date | Filing Date | Title |
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CN200410008616.X | 2004-03-12 | ||
CNB200410008616XA CN1311677C (zh) | 2004-03-12 | 2004-03-12 | 一种数字视像节目角色头部的替换方法 |
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WO2005088966A1 true WO2005088966A1 (fr) | 2005-09-22 |
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PCT/CN2005/000299 WO2005088966A1 (fr) | 2004-03-12 | 2005-03-11 | Procede de substitution pour la modification d'un programme tv numerique |
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WO (1) | WO2005088966A1 (zh) |
Families Citing this family (7)
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WO2007032075A1 (ja) * | 2005-09-15 | 2007-03-22 | Dentsu Inc. | アトラクションシステムおよびアトラクション提供方法 |
CN102196245A (zh) * | 2011-04-07 | 2011-09-21 | 北京中星微电子有限公司 | 一种角色互动的视频播放方法和视频播放装置 |
CN102447869A (zh) * | 2011-10-27 | 2012-05-09 | 天津三星电子有限公司 | 一种角色替代方法 |
JP5578186B2 (ja) * | 2012-02-16 | 2014-08-27 | カシオ計算機株式会社 | キャラクター画像の作成方法、画像処理装置及び画像処理プログラム並びに画像変換ネットワークシステム |
CN104657974A (zh) * | 2013-11-25 | 2015-05-27 | 腾讯科技(上海)有限公司 | 一种图像处理方法及装置 |
CN103984738B (zh) * | 2014-05-22 | 2017-05-24 | 中国科学院自动化研究所 | 一种基于搜索匹配的角色标注方法 |
CN109936775A (zh) * | 2017-12-18 | 2019-06-25 | 东斓视觉科技发展(北京)有限公司 | 宣传影片的制作方法及设备 |
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JPH09219836A (ja) * | 1996-02-14 | 1997-08-19 | Matsushita Electric Ind Co Ltd | 画像情報記録方法と画像合成装置 |
JPH09238301A (ja) * | 1996-02-29 | 1997-09-09 | Toshiba Corp | デジタルビデオ編集方法 |
CN1188372A (zh) * | 1996-12-19 | 1998-07-22 | 德国汤姆逊-布朗特公司 | 替换数字编码图像的局部的方法及实现该方法的装置 |
CN1324185A (zh) * | 2000-04-26 | 2001-11-28 | 朗迅科技公司 | 动态修改数字视频图像的方法和装置 |
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US6539099B1 (en) * | 1999-08-30 | 2003-03-25 | Electric Planet | System and method for visual chat |
KR20010090308A (ko) * | 2000-03-24 | 2001-10-18 | 박선은 | 극중 얼굴 이미지 변환 서비스 방법 및 그 시스템 |
US6771303B2 (en) * | 2002-04-23 | 2004-08-03 | Microsoft Corporation | Video-teleconferencing system with eye-gaze correction |
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2004
- 2004-03-12 CN CNB200410008616XA patent/CN1311677C/zh not_active Expired - Fee Related
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- 2005-03-11 WO PCT/CN2005/000299 patent/WO2005088966A1/zh active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH09219836A (ja) * | 1996-02-14 | 1997-08-19 | Matsushita Electric Ind Co Ltd | 画像情報記録方法と画像合成装置 |
JPH09238301A (ja) * | 1996-02-29 | 1997-09-09 | Toshiba Corp | デジタルビデオ編集方法 |
CN1188372A (zh) * | 1996-12-19 | 1998-07-22 | 德国汤姆逊-布朗特公司 | 替换数字编码图像的局部的方法及实现该方法的装置 |
CN1324185A (zh) * | 2000-04-26 | 2001-11-28 | 朗迅科技公司 | 动态修改数字视频图像的方法和装置 |
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CN1311677C (zh) | 2007-04-18 |
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