WO1992003799A1 - Method of motion compensation and elastic deformation in picture sequences - Google Patents
Method of motion compensation and elastic deformation in picture sequences Download PDFInfo
- Publication number
- WO1992003799A1 WO1992003799A1 PCT/SE1991/000529 SE9100529W WO9203799A1 WO 1992003799 A1 WO1992003799 A1 WO 1992003799A1 SE 9100529 W SE9100529 W SE 9100529W WO 9203799 A1 WO9203799 A1 WO 9203799A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- picture
- motion vectors
- triangles
- calculated
- motion
- Prior art date
Links
- 230000033001 locomotion Effects 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000005489 elastic deformation Effects 0.000 title abstract description 6
- 239000013598 vector Substances 0.000 claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 239000011159 matrix material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/12—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal
- H04N7/122—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal involving expansion and subsequent compression of a signal segment, e.g. a frame, a line
- H04N7/125—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal involving expansion and subsequent compression of a signal segment, e.g. a frame, a line the signal segment being a picture element
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/20—Analysis of motion
- G06T7/246—Analysis of motion using feature-based methods, e.g. the tracking of corners or segments
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
- H04N19/51—Motion estimation or motion compensation
- H04N19/537—Motion estimation other than block-based
- H04N19/54—Motion estimation other than block-based using feature points or meshes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
- H04N19/98—Adaptive-dynamic-range coding [ADRC]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/144—Movement detection
- H04N5/145—Movement estimation
Definitions
- the present invention relates to a method of motion compensation and elastic deformation in the picture sequences, that is a picture coding method in which the pixel values in a picture are determined using the pre ⁇ vious picture. It is assumed that the motion between two successive pictures is known, that is the motion vector field is known. The motion may include both translation and deformation.
- the present. invention provides a method of motion compensation and elastic deformation in picture sequences in transmission of moving pictures between a transmitter and a receiver.
- each picture in a pic ⁇ ture sequence is divided into triangles and the motion be ⁇ tween two successive pictures is estimated such that the motion vectors in the corner points of the triangles can be determined.
- Information about the corner points and/or the motion vectors is transmitted from the transmitter to the receiver.
- the motion vectors of the inter ⁇ nal points of the triangles are calculated using the three transmitted motion vectors associated with the respective triangle.
- the pixel values of the corner points of the re ⁇ spective triangles are calculated using the transmitted motion vectors and the previous picture and the internal pixel values are calculated using the calculated motion vectors and the previous picture.
- FIG. 1 shows translation, figure 2. rotation and figure 3. deformation.
- the purpose of the invention is to enable transmission of picture sequences by starting from one picture and only transmit motion vectors.
- a problem is that square blocks then may become visible in the picture because of discontinuities in the motion vec ⁇ tor field between adjacent blocks.
- the picture is divided into triangles .instead.
- the division may be fixed or may be adapted to the picture in question and the motion therein.
- the corner points of each triangle are estab ⁇ lished the motion vectors in the 'orner points are deter ⁇ mined relative to the previous picture in the sequence.
- Motion vectors are assigned to points within each triangle by interpolating the motion vectors in the corner points.
- contiguous triangles have the same motion vectors along the whole common side. Thereby no discontinuities occur.
- the pixel values are obtained from the previous picture using the motion vector fields obtained in this way.
- the motion vectors indicate undefined points in the previous picture.
- the pixel value is then obtained using an interpolation filter, preferably in accordance with our co-pending patent application titled "Method of moving a pixel a subpixel distance".
- Figure 1 shows a translation, figure 2 a rotation and figure 3 a deformation, in this case an en ⁇ largement .
- the movement of the triangle is a combination of these three basic types .
- the co-ordinates of the new triangle can be expressed in matrix form as
- Any point (x, y) may be expressed using the position vectors of the triangel Xt. Define a triangle having three corner points
- a set of positions X may be expressed as
- each line has nc positions and the values 1-a , ai-bi and bi are placed in the positions correspondning to the corner point that is to be used. All other positions are zero.
- the triangle division of the picture is performed in the transmitter and the corner points of the triangles are established. Thereafter, the motion vectors and the corner points are established.
- a complete picture is trans ⁇ mitted between the transmitter and receiver. Thereafter, only motion vectors and information about the corner point associated with each motion vector are transmitted.
- the present invention provides a method of motion compensation and elastic deformation in picture sequences which solves the above problem with discontinuities between blocks in the picture.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Television Systems (AREA)
- Image Analysis (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
The invention relates to a method of motion compensation and elastic deformation in picture sequences in transmission of moving pictures between a transmitter and a receiver, that is a picture coding method in which the pixel values of the picture are determined using a previous picture. In the transmitter, each picture in the picture sequence is divided into triangles by suitably choosing corner points, and the motion between two successive pictures is estimated such that the motion vectors of all the corner points can be established. Information about the corner points and/or the motion vectors is transmitted from the transmitter to the receiver, in which the motion vectors of the internal points of the triangles are calculated using the three transmitted motion vectors belonging to the respective triangle. The pixel values in the corner points of the triangles and in the internal points of the triangles are calculated using the trasmitted and the calculated motion vectors, respectively. Preferably, the motion vectors of the internal points of the triangles are calculated by interpolation.
Description
TITLE OF INVENTION: METHOD OF MOTION COMPENSATION AND
ELASTIC DEFORMATION IN PICTURE SEQUENCES
FIELD OF THE INVENTION
The present invention relates to a method of motion compensation and elastic deformation in the picture sequences, that is a picture coding method in which the pixel values in a picture are determined using the pre¬ vious picture. It is assumed that the motion between two successive pictures is known, that is the motion vector field is known. The motion may include both translation and deformation.
STATE OF THE ART
It is previously known to use motion vector fields for picture coding. In this connection, the picture is divided into rectangular blocks. In this division problems may occur with visible squares in the picture sequence because of dis¬ continuities at the edges of the block. According to the present invention this problem is solved by dividing the picture in triangles instead and interpolate the motion field.
SUMMARY OF THE INVENTION
Thus, the present. invention provides a method of motion compensation and elastic deformation in picture sequences in transmission of moving pictures between a transmitter and a receiver. According to the invention each picture in a pic¬ ture sequence is divided into triangles and the motion be¬ tween two successive pictures is estimated such that the motion vectors in the corner points of the triangles can be
determined. Information about the corner points and/or the motion vectors is transmitted from the transmitter to the receiver. In the receiver the motion vectors of the inter¬ nal points of the triangles are calculated using the three transmitted motion vectors associated with the respective triangle. The pixel values of the corner points of the re¬ spective triangles are calculated using the transmitted motion vectors and the previous picture and the internal pixel values are calculated using the calculated motion vectors and the previous picture.
Further features of the invention are set forth in detail in the accompanying claims.
BRIEF DESCRIPTION OF THE DRAWINGS The drawing is a schematic illustration of two successive pictures in which corresponding triangles have been drawn and the respective motion vectors, in which figure 1. shows translation, figure 2. rotation and figure 3. deformation.
The invention is described below in detail.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION The purpose of the invention is to enable transmission of picture sequences by starting from one picture and only transmit motion vectors. There already exists methods of dividing the pictures in rectangular blocks and of deter¬ mining the motion vectors applying within the blocks . A problem is that square blocks then may become visible in the picture because of discontinuities in the motion vec¬ tor field between adjacent blocks.
According to the present invention the picture is divided into triangles .instead. The division may be fixed or may be adapted to the picture in question and the motion therein. When the corner points of each triangle are estab¬ lished the motion vectors in the 'orner points are deter¬ mined relative to the previous picture in the sequence. Motion vectors are assigned to points within each triangle by interpolating the motion vectors in the corner points.
Thus, contiguous triangles have the same motion vectors along the whole common side. Thereby no discontinuities occur.
The pixel values are obtained from the previous picture using the motion vector fields obtained in this way. Generally, the motion vectors indicate undefined points in the previous picture. The pixel value is then obtained using an interpolation filter, preferably in accordance with our co-pending patent application titled "Method of moving a pixel a subpixel distance".
In the figures, various ways of how a triangle can be moved are shown. Figure 1 shows a translation, figure 2 a rotation and figure 3 a deformation, in this case an en¬ largement . Normally, the movement of the triangle is a combination of these three basic types . The co-ordinates of the new triangle can be expressed in matrix form as
Yt = Xt + Mt
where Xt is the co-ordinates of the old triangle, Yt is the new triangle and Mt contains the three motion vectors.
Any point (x, y) may be expressed using the position vectors of the triangel Xt. Define a triangle having three corner points
Create a base of vectors vi, V2, V3 using the corner points
Then an arbitrary point in the picture plane can be expressed as
(x, y) = vi + av2 + v3
For points within the triangle Xt the following relations apply
0 < a < 1 and 0 < b < a .
For a given point (x, y ) a and b can be calculated with the formulas
a =
(X3- 2) (y2-yι) - (y3-y2) (χ2-χι)
A set of positions X may be expressed as
X = BXt
where each line of X is a position (xi, yi) and
Several triangles can be processed at the same time with a matrix Xt containing all the triangle corners in¬ volved. With a number of corners = nc:
Then B is modified such that each line has nc positions and the values 1-a , ai-bi and bi are placed in the positions correspondning to the corner point that is to be used. All other positions are zero.
A continouos motion vector field in the triangle Yt is obtained if the motion vectors are calculated as
M = BMt where the positions in question within the respective triangle are inserted in B.
The triangle division of the picture is performed in the transmitter and the corner points of the triangles are established. Thereafter, the motion vectors and the corner points are established. First, a complete picture is trans¬ mitted between the transmitter and receiver. Thereafter, only motion vectors and information about the corner point associated with each motion vector are transmitted. In the receiver the motion vector of every point in the picture is calculated by interpolation of the motion vectors in the corner point (that is by the formula M = BMt) . Thereafter, all the pixel values can be calculated using the motion vectors and the previous picture.
Thus, the present invention provides a method of motion compensation and elastic deformation in picture sequences which solves the above problem with discontinuities between blocks in the picture. The invention is defined in the accompanying claims.
Claims
1. Method of motion compensation and elastic defor¬ mation in picture sequences in transmission of moving pic- tures between a transmitter and a receiver, characterized in that in the transmitter, each picture in a picture sequence is divided into triangles by suitable choice of corner points, the motion between two successive pictures is estimated, and the motion vectors in all the corner points is established, information about the motion vectors and, if necessary, the corner points is transmitted from the transmitter to the receiver, and in the receiver, the motion vectors of the internal points of the triangles are calculated using the three transmitted motion vectors of the respective triangle, the pixel values of the corner points of the triangles are calculated using the transmitted motion vectors and the previous picture, and the pixel values of the internal points of the tri¬ angles are calculated using the calculated motion vectors and the previous picture.
2. Method according to claim 1, characterized in that the motion vectors of the internal pixels of the triangles are calculated by interpolation.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP91915636A EP0543915B1 (en) | 1990-08-15 | 1991-08-12 | Method of motion compensation and elastic deformation in picture sequences |
DE69129031T DE69129031T2 (en) | 1990-08-15 | 1991-08-12 | METHOD FOR COMPENSATING MOTION AND ELASTIC DEFORMING IN IMAGE ROWS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9002647-7 | 1990-08-15 | ||
SE9002647A SE465394B (en) | 1990-08-15 | 1990-08-15 | METHOD FOR MOVEMENT COMPENSATION AND ELASTIC DEFORMATION IN IMAGE SEQUENCES |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992003799A1 true WO1992003799A1 (en) | 1992-03-05 |
Family
ID=20380153
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1991/000529 WO1992003799A1 (en) | 1990-08-15 | 1991-08-12 | Method of motion compensation and elastic deformation in picture sequences |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0543915B1 (en) |
JP (1) | JP3067207B2 (en) |
DE (1) | DE69129031T2 (en) |
SE (1) | SE465394B (en) |
WO (1) | WO1992003799A1 (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994006093A1 (en) * | 1992-09-09 | 1994-03-17 | Massachusetts Institute Of Technology | Computer method and apparatus for matching between line drawings |
EP0632657A1 (en) * | 1993-06-02 | 1995-01-04 | Oy Nokia Ab | Method of prediction of a video image |
WO1995034172A2 (en) * | 1994-06-03 | 1995-12-14 | Idt International Digital Technologies Deutschland Gmbh | Apparatus and method for decoding video images |
EP0720383A1 (en) * | 1994-12-30 | 1996-07-03 | Daewoo Electronics Co., Ltd | Method and apparatus for detecting motion vectors in a frame decimating video encoder |
EP0720381A1 (en) * | 1994-12-30 | 1996-07-03 | Daewoo Electronics Co., Ltd | Method and apparatus for encoding a video signal using pixel-by-pixel motion prediction |
FR2729266A1 (en) * | 1995-01-10 | 1996-07-12 | France Telecom | METHOD FOR INTERPOLATING IMAGES |
EP0740473A2 (en) * | 1995-04-29 | 1996-10-30 | Daewoo Electronics Co., Ltd | Apparatus for encoding a video signal using feature point based motion estimation |
EP0765087A2 (en) * | 1995-08-29 | 1997-03-26 | Sharp Kabushiki Kaisha | Video coding device |
EP0797357A2 (en) * | 1996-03-18 | 1997-09-24 | Hitachi, Ltd. | Method of image coding and decoding |
EP0734178A3 (en) * | 1995-03-18 | 1998-05-27 | Daewoo Electronics Co., Ltd | Method and apparatus for determining true motion vectors for selected pixels |
WO1998027515A1 (en) * | 1996-12-16 | 1998-06-25 | Sharp Kabushiki Kaisha | 2-d mesh geometry and motion vector compression |
GB2323993A (en) * | 1997-03-31 | 1998-10-07 | Samsung Electronics Co Ltd | Method for motion estimation in a moving picture |
GB2323992A (en) * | 1997-03-31 | 1998-10-07 | Samsung Electronics Co Ltd | Motion compensation using triangle patch wireframe model |
EP0771117A3 (en) * | 1995-10-28 | 1998-10-28 | Daewoo Electronics Co., Ltd | Method and apparatus for encoding and decoding a video signal using feature point based motion estimation |
CN1103166C (en) * | 1995-03-20 | 2003-03-12 | 大宇电子株式会社 | Method for encoding video signal using feature point based motion estimation |
CN1117482C (en) * | 1995-04-29 | 2003-08-06 | 大宇电子株式会社 | Method for encoding video signal using feature point based motion estimation |
CN1122421C (en) * | 1995-08-04 | 2003-09-24 | 株式会社大宇电子 | Improved motion vector estimation method and apparatus for use in image signal encoding system |
EP1725046A2 (en) | 1997-03-17 | 2006-11-22 | Mitsubishi Denki Kabushiki Kaisha | Video encoding and decoding |
CN113475081A (en) * | 2018-12-05 | 2021-10-01 | 高通股份有限公司 | Triangle motion information for video coding |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5684538A (en) | 1994-08-18 | 1997-11-04 | Hitachi, Ltd. | System and method for performing video coding/decoding using motion compensation |
JP4591495B2 (en) * | 2007-10-22 | 2010-12-01 | 株式会社日立製作所 | Image encoding method and image encoding apparatus |
JP4609602B2 (en) * | 2010-07-12 | 2011-01-12 | 株式会社日立製作所 | Image decoding method and image code decoding apparatus |
CN103839241B (en) * | 2014-03-21 | 2015-07-15 | 北京航空航天大学 | Interpolation triangle forming method and device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0280316A2 (en) * | 1987-02-25 | 1988-08-31 | Sony Corporation | Video image transforming method and apparatus |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4661849A (en) * | 1985-06-03 | 1987-04-28 | Pictel Corporation | Method and apparatus for providing motion estimation signals for communicating image sequences |
-
1990
- 1990-08-15 SE SE9002647A patent/SE465394B/en not_active IP Right Cessation
-
1991
- 1991-08-12 DE DE69129031T patent/DE69129031T2/en not_active Expired - Fee Related
- 1991-08-12 JP JP3514011A patent/JP3067207B2/en not_active Expired - Lifetime
- 1991-08-12 WO PCT/SE1991/000529 patent/WO1992003799A1/en active IP Right Grant
- 1991-08-12 EP EP91915636A patent/EP0543915B1/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0280316A2 (en) * | 1987-02-25 | 1988-08-31 | Sony Corporation | Video image transforming method and apparatus |
Cited By (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5325475A (en) * | 1992-09-09 | 1994-06-28 | Massachusetts Institute Of Technology | Computer method and apparatus for matching between line drawings |
WO1994006093A1 (en) * | 1992-09-09 | 1994-03-17 | Massachusetts Institute Of Technology | Computer method and apparatus for matching between line drawings |
EP0632657A1 (en) * | 1993-06-02 | 1995-01-04 | Oy Nokia Ab | Method of prediction of a video image |
US6046773A (en) * | 1994-06-03 | 2000-04-04 | Idt International Digital Technologies Deutschland Gmbh | Apparatus and method for decoding video images |
WO1995034172A2 (en) * | 1994-06-03 | 1995-12-14 | Idt International Digital Technologies Deutschland Gmbh | Apparatus and method for decoding video images |
WO1995034172A3 (en) * | 1994-06-03 | 1996-05-23 | Idt Deutschland Gmbh | Apparatus and method for decoding video images |
EP0720381A1 (en) * | 1994-12-30 | 1996-07-03 | Daewoo Electronics Co., Ltd | Method and apparatus for encoding a video signal using pixel-by-pixel motion prediction |
US5619281A (en) * | 1994-12-30 | 1997-04-08 | Daewoo Electronics Co., Ltd | Method and apparatus for detecting motion vectors in a frame decimating video encoder |
EP0720383A1 (en) * | 1994-12-30 | 1996-07-03 | Daewoo Electronics Co., Ltd | Method and apparatus for detecting motion vectors in a frame decimating video encoder |
FR2729266A1 (en) * | 1995-01-10 | 1996-07-12 | France Telecom | METHOD FOR INTERPOLATING IMAGES |
US5933547A (en) * | 1995-01-10 | 1999-08-03 | France Telecom | Method for interpolating images |
US6275532B1 (en) | 1995-03-18 | 2001-08-14 | Sharp Kabushiki Kaisha | Video coding device and video decoding device with a motion compensated interframe prediction |
EP0734178A3 (en) * | 1995-03-18 | 1998-05-27 | Daewoo Electronics Co., Ltd | Method and apparatus for determining true motion vectors for selected pixels |
CN1103166C (en) * | 1995-03-20 | 2003-03-12 | 大宇电子株式会社 | Method for encoding video signal using feature point based motion estimation |
US5751362A (en) * | 1995-04-29 | 1998-05-12 | Daewoo Electronics, Co., Ltd. | Apparatus for encoding a video signal using feature point based motion estimation |
EP0740473A3 (en) * | 1995-04-29 | 1997-07-30 | Daewoo Electronics Co Ltd | Apparatus for encoding a video signal using feature point based motion estimation |
CN1117482C (en) * | 1995-04-29 | 2003-08-06 | 大宇电子株式会社 | Method for encoding video signal using feature point based motion estimation |
EP0740473A2 (en) * | 1995-04-29 | 1996-10-30 | Daewoo Electronics Co., Ltd | Apparatus for encoding a video signal using feature point based motion estimation |
CN1122421C (en) * | 1995-08-04 | 2003-09-24 | 株式会社大宇电子 | Improved motion vector estimation method and apparatus for use in image signal encoding system |
EP2129133A3 (en) * | 1995-08-29 | 2012-02-15 | Sharp Kabushiki Kaisha | Video coding device and video decoding device with a motion compensated interframe prediction |
EP1274252A3 (en) * | 1995-08-29 | 2005-10-05 | Sharp Kabushiki Kaisha | Video coding device and video decoding device with a motion compensated interframe prediction |
EP1274253A3 (en) * | 1995-08-29 | 2005-10-12 | Sharp Kabushiki Kaisha | Video coding device and video decoding device with a motion compensated interframe prediction |
EP0765087A3 (en) * | 1995-08-29 | 1998-07-29 | Sharp Kabushiki Kaisha | Video coding device |
EP1274252A2 (en) * | 1995-08-29 | 2003-01-08 | Sharp Kabushiki Kaisha | Video coding device and video decoding device with a motion compensated interframe prediction |
EP0765087A2 (en) * | 1995-08-29 | 1997-03-26 | Sharp Kabushiki Kaisha | Video coding device |
EP0771117A3 (en) * | 1995-10-28 | 1998-10-28 | Daewoo Electronics Co., Ltd | Method and apparatus for encoding and decoding a video signal using feature point based motion estimation |
EP1646242A3 (en) * | 1996-03-18 | 2010-10-27 | Hitachi, Ltd. | Apparatus for decoding images |
EP1646242A2 (en) * | 1996-03-18 | 2006-04-12 | Hitachi, Ltd. | Apparatus for decoding images |
EP0797357A2 (en) * | 1996-03-18 | 1997-09-24 | Hitachi, Ltd. | Method of image coding and decoding |
EP0797357A3 (en) * | 1996-03-18 | 1999-11-24 | Hitachi, Ltd. | Method of image coding and decoding |
WO1998027515A1 (en) * | 1996-12-16 | 1998-06-25 | Sharp Kabushiki Kaisha | 2-d mesh geometry and motion vector compression |
US8098734B2 (en) | 1997-03-17 | 2012-01-17 | Mitsubishi Denki Kabushiki Kaisha | Video encoder, video decoder, video encoding method, video decoding method, and video encoding and decoding system |
US8170105B2 (en) | 1997-03-17 | 2012-05-01 | Mitsubishi Denki Kabushiki Kaisha | Video decoder and video decoding method |
US8194742B2 (en) | 1997-03-17 | 2012-06-05 | Mitsubishi Denki Kabushiki Kaisha | Video decoder |
EP1725046A2 (en) | 1997-03-17 | 2006-11-22 | Mitsubishi Denki Kabushiki Kaisha | Video encoding and decoding |
EP1725046A3 (en) * | 1997-03-17 | 2009-05-13 | Mitsubishi Denki Kabushiki Kaisha | Video encoding and decoding |
EP2252065A3 (en) * | 1997-03-17 | 2011-02-02 | Mitsubishi Denki Kabushiki Kaisha | Video decoding method |
EP2252065A2 (en) | 1997-03-17 | 2010-11-17 | Mitsubishi Denki Kabushiki Kaisha | Video decoding method |
EP2252067A2 (en) * | 1997-03-17 | 2010-11-17 | Mitsubishi Denki Kabushiki Kaisha | Video decoder and video decoding method |
EP2252067A3 (en) * | 1997-03-17 | 2011-02-02 | Mitsubishi Denki Kabushiki Kaisha | Video decoder and video decoding method |
EP2252068A3 (en) * | 1997-03-17 | 2011-02-02 | Mitsubishi Denki Kabushiki Kaisha | Video decoding method |
GB2323993B (en) * | 1997-03-31 | 1999-06-02 | Samsung Electronics Co Ltd | Method for motion estimation in a moving picture |
DE19756224C2 (en) * | 1997-03-31 | 2002-03-14 | Samsung Electronics Co Ltd | Method for determining the motion of a moving image using a two-dimensional triangular pattern grid model |
US6154578A (en) * | 1997-03-31 | 2000-11-28 | Samsung Electronics Co., Ltd. | Method for motion compensation of a moving image using two dimensional triangle patch wireframe model |
GB2323993A (en) * | 1997-03-31 | 1998-10-07 | Samsung Electronics Co Ltd | Method for motion estimation in a moving picture |
GB2323992A (en) * | 1997-03-31 | 1998-10-07 | Samsung Electronics Co Ltd | Motion compensation using triangle patch wireframe model |
CN113475081A (en) * | 2018-12-05 | 2021-10-01 | 高通股份有限公司 | Triangle motion information for video coding |
CN113475081B (en) * | 2018-12-05 | 2024-04-19 | 高通股份有限公司 | Triangle motion information for video coding |
Also Published As
Publication number | Publication date |
---|---|
SE9002647L (en) | 1991-09-02 |
SE465394B (en) | 1991-09-02 |
EP0543915B1 (en) | 1998-03-04 |
DE69129031T2 (en) | 1998-06-25 |
DE69129031D1 (en) | 1998-04-09 |
SE9002647D0 (en) | 1990-08-15 |
EP0543915A1 (en) | 1993-06-02 |
JPH06500212A (en) | 1994-01-06 |
JP3067207B2 (en) | 2000-07-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO1992003799A1 (en) | Method of motion compensation and elastic deformation in picture sequences | |
CN1098596C (en) | Method and apparatus for determining feature points | |
US6903735B2 (en) | Apparatus for synthesizing multiview image using two images of stereo camera and depth map | |
EP0502622B1 (en) | Image processing method | |
EP0172755A2 (en) | An apparatus for an efficient coding of television signals | |
EP0705027A2 (en) | Region-based image processing method, image processing apparatus and image communication apparatus | |
CA2126921A1 (en) | Apparatus and method for producing picture data based on two-dimensional and three-dimensional picture data producing instructions | |
EP0574251B1 (en) | Image processing method and apparatus | |
US5617482A (en) | Method of motion compensation and elastic deformation in picture sequences | |
EP0685790A3 (en) | Transporting a display object coupled to a viewpoint within or between navigable workspaces | |
GB2188510A (en) | Tv picture motion measurement | |
US6011863A (en) | Cylindrical rectification to minimize epipolar distortion | |
CN1133527A (en) | Method of adopting moveable self-adaption space filter to make time wave filter to video frequency signal | |
ES2015393A6 (en) | Document manipulation in a data processing system. | |
GB2222500A (en) | Picture motion measurement | |
US5933547A (en) | Method for interpolating images | |
EP0367310B1 (en) | Picture motion measurement | |
Abdel-Malek et al. | Feature cueing in the discrete cosine transform domain | |
US5379370A (en) | Method and apparatus for drawing lines, curves, and points coincident with a surface | |
ATE100953T1 (en) | METHOD AND DEVICE FOR ESTIMATING AND COMPENSATING MOTION IN AN IMAGE SEQUENCE AND IMAGE TRANSMISSION SYSTEM WITH SUCH DEVICE. | |
CA2043176A1 (en) | Z-buffer quantization of three-dimensional lines | |
EP1496476A1 (en) | Device and method for simulating movement in a virtual scene | |
JP2813211B2 (en) | Range image generation method | |
EP0456995B1 (en) | Video signal improving method | |
Takano et al. | 3D space coding using virtual object surface |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LU NL SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1991915636 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1991915636 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1991915636 Country of ref document: EP |