WO1993017525A1 - Motion compensated video image processing - Google Patents

Motion compensated video image processing Download PDF

Info

Publication number
WO1993017525A1
WO1993017525A1 PCT/GB1993/000403 GB9300403W WO9317525A1 WO 1993017525 A1 WO1993017525 A1 WO 1993017525A1 GB 9300403 W GB9300403 W GB 9300403W WO 9317525 A1 WO9317525 A1 WO 9317525A1
Authority
WO
WIPO (PCT)
Prior art keywords
producing
assigning
technique
image processing
motion compensated
Prior art date
Application number
PCT/GB1993/000403
Other languages
French (fr)
Inventor
Michael Burl
Original Assignee
British Broadcasting Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by British Broadcasting Corporation filed Critical British Broadcasting Corporation
Priority to GB9417278A priority Critical patent/GB2279200B/en
Priority to DE69320461T priority patent/DE69320461T2/en
Priority to EP93904265A priority patent/EP0628234B1/en
Priority to JP5514672A priority patent/JPH07504304A/en
Publication of WO1993017525A1 publication Critical patent/WO1993017525A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0135—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving interpolation processes
    • H04N7/014—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving interpolation processes involving the use of motion vectors
    • 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
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/103—Selection of coding mode or of prediction mode
    • H04N19/105—Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
    • 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
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/103—Selection of coding mode or of prediction mode
    • H04N19/112—Selection of coding mode or of prediction mode according to a given display mode, e.g. for interlaced or progressive display mode
    • 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
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/136—Incoming video signal characteristics or properties
    • H04N19/137—Motion inside a coding unit, e.g. average field, frame or block difference
    • 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
    • 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
    • H04N19/587—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal sub-sampling or interpolation, e.g. decimation or subsequent interpolation of pictures in a video sequence
    • 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

  • This invention relates to video image processing and in particular to motion compensated image processing.
  • Various motion compensation techniques may be used when it is desired to calculate a frame intermediate of two frames in a video sequence. This may be necessary in slow motion simulation or in standards conversion. The positions of moving objects within these fields are calculated with reference to a plurality of the other fields in the sequence.
  • An example of such a motion compensation system is given in our British Patent Application No. 9111348.0.
  • Each elementary area may be as small as a pixel or may comprise a block of many pixels.
  • Phase correlation has been found to work very well for linear movements in objects and is very rarely confused by detail in the scene. It has not been found, however, to be particularly effective when used on rotating objects or on scenes where small picture elements move in different directions.
  • 'block matching' The other commonly used technique for motion estimation is known as 'block matching'.
  • n pixels by m pixels is compared with a corresponding block in a previous field and with each of a plurality of equally sized blocks within a predetermined range in that previous field. For a pair of interleaved video fields this range might be +/- 8 field lines vertically and +/- 16 pixels horizontally.
  • the block which gives the best match to the original block is then used to derive a motion vector for that block.
  • a method for motion compensated image processing comprising the steps of producing vectors assigned to elementary areas of input video fields from at least two fields in a sequence of video images by means of a first technique and producing vectors assigned to elementary areas of input video fields by means of a second technique in response to an error signal produced by the first technique.
  • a motion compensated image processing system which uses a phase correlation technique to derive motion vectors.
  • the motion estimation comprises phase correlating the input images and from this deriving a phase correlation surface.
  • the peaks in this correspond to motion peaks and a list of a predetermined number of these above a certain threshold is selected as a trial menu for assigning vectors to elementary areas of the picture for deriving an. output field.
  • a vector is assigned to an elementry area when its match error (calculated by applying the vector to an elementary area of an input field and summing the differences at a second input field ⁇ is below a certain level.
  • a block matcher is used on that picture area and a best fit vector derived. If the match error for this vector is lower than, that for the phase correlation derived vector and preferably also below the match error then it is assigned to that picture area.
  • the combined system uses the strengths of each method, a correctly assigned vector from the phase correlation has a very high confidence of being true motion and hence a dual system would have a priority for building pictures by this method. Where no good assignment can be made from the phase correlation technique the system will look at the match error of a block match derived vector.
  • the dual system will exploit the natural strengths of each technique and be less complex and more certain than current methods.
  • a simulation using the parameters of a currently available block match integrated circuit confirms that the technique works for those regions of the picture that phase correlation finds difficult.
  • the work to date has been carried out using a block size of 16 pixels and 8 field lines.
  • the range of detected motions are approx +/- 16 pixels and +/- 8 field lines. Over this range of linear displacements either technique will work.
  • the phase correlator 4 is of the type described in British Patent No. 2188510B and produces a correlation surface 8 at its output. This forms the input to a peak hunter circuit 10 which searches the correlation surface for the highest values thereon. These correspond to the peak motion vectors between a pair of input fields and these trial vectors are provided on outputs V 1 -V n which form inputs to assignment units 12. Typically the five highest peaks will be used as the set of trial vectors provided at the outputs.
  • Each assignment circuit 12 receives a single vector and tests each elementary area of an input field with that vector and produces an error signal in dependence on the error that vector generates in deriving one field from that input field. These errors 14 are provided in parallel to an error detector 16 for each elementary area in turn.
  • the minimum error signal detected by the error detector 16 is provided at an output coupled to an input A of a thresholding circuit 18.
  • a second input B receives a threshold level. If the error A ⁇ B then a control signal for a vector selection 20 is generated which will then select the best assigned vector as determined by the error detection 20 for assignment to that particular elementary area of an input video field.
  • thresholding circuit 26 the operation of which will be described below.
  • the second thresholding circuit 26 receives an error signal from the block matcher circuit 6.
  • This block matcher circuit operates on the same input video fields 2 as the phase correlator 4. It generates a best block match, vector 30 which is provided at an input of the vector selection circuit 20.
  • the block match error C is compared with a threshold D. If the error C ⁇ D then an output is generated which is coupled to the second output of AND gate 22. Thus if the phase correlation generates an error A greater than threshold B and the block matcher produces an error C less than a threshold D a logical 1 will be generated at the output of AND gate 22. This output is used to control selection circuit 20 to assign the best block match vector to the particular elementary area.
  • the block matches are overlapped 2:1 in both directions and the best vector assigned to the central 1/4 area of the block. It is also proposed to determine an estimate of subpixel movements by matching a 'V shape to the lower match error in the distortion map from the block matcher.
  • the vectors (probably only three plus a pan vector) from the phase correlator are assigned in a well known manner. A good match gives high confidence of being true motion. If the match is above some threshold then the block matcher is left to assign. If the block matcher also shows a high match error then a fallback method is used as before. This would comprise assiging a zero vector to that elementary area. In essence the block matcher is a more sophisticated fallback mode that will allow the processor to cope with most kinds of motion.
  • the match error is normalised by dividing it by the luminance gradient for the picture element in question. It is then compared with the threshold level to decide whether or not to use the block matcher.
  • the reason for this normalisation is that a good match error for a picture with a lot of motion in it will be substantially different to a good match error for a picture with very little motion in it.
  • the normalisation by dividing by the luminance gradient will enable the same threshold level to be used for each picture.
  • the luminance gradient used for normalisation is the greatest value of luminance gradient at a picture element. It is calculated from a combination of the vertical and horizontal gradients.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Image Analysis (AREA)
  • Television Systems (AREA)
  • Color Television Systems (AREA)

Abstract

Motion compensated image processing is performed by producing vectors assigned to elementary areas of video fields. These are produced from at least two video fields in a sequence. A first technique is used to produce the vectors. If an error signal is produced by the first technique then a second technique is used for the production of vectors.

Description

Motion Compensated Video Image Processing
This invention relates to video image processing and in particular to motion compensated image processing.
Various motion compensation techniques may be used when it is desired to calculate a frame intermediate of two frames in a video sequence. This may be necessary in slow motion simulation or in standards conversion. The positions of moving objects within these fields are calculated with reference to a plurality of the other fields in the sequence. An example of such a motion compensation system is given in our British Patent Application No. 9111348.0.
There are two commonly used motion estimation techniques used to produce motion vectors representing the differences between a pair of video images and further techniques exist.
The first of these is phase correlation and a technique for implementing this is described in our British Patent Number
2188510B. This produces a list of motion vectors which are applicable over the whole area of the image and over each
elementary area of the image. To use the vectors it is necessary to select which of them will apply to a given elementary area of the picture. Each elementary area may be as small as a pixel or may comprise a block of many pixels.
Phase correlation has been found to work very well for linear movements in objects and is very rarely confused by detail in the scene. It has not been found, however, to be particularly effective when used on rotating objects or on scenes where small picture elements move in different directions.
The other commonly used technique for motion estimation is known as 'block matching'. In this a block of video data n pixels by m pixels is compared with a corresponding block in a previous field and with each of a plurality of equally sized blocks within a predetermined range in that previous field. For a pair of interleaved video fields this range might be +/- 8 field lines vertically and +/- 16 pixels horizontally. The block which gives the best match to the original block is then used to derive a motion vector for that block. When block matching systems are used they can easily break down in the matching stage and consequently can introduce
inaccuracies when, for example, there is a camera pan.
In motion compensation systems the choice has usually been between phase correlation techniques and block matching techniques. The chosen, technique has then been, developed as far as possible to attempt to eliminate any failings caused by particular types of motion.
According to the present invention there is provided a method for motion compensated image processing comprising the steps of producing vectors assigned to elementary areas of input video fields from at least two fields in a sequence of video images by means of a first technique and producing vectors assigned to elementary areas of input video fields by means of a second technique in response to an error signal produced by the first technique.
A preferred embodiment of the invention will now be described in detail by way of example with reference to the sole figure.
In British Patent Application No. 9111348.0 there is described a motion compensated image processing system which uses a phase correlation technique to derive motion vectors. The motion estimation comprises phase correlating the input images and from this deriving a phase correlation surface. The peaks in this correspond to motion peaks and a list of a predetermined number of these above a certain threshold is selected as a trial menu for assigning vectors to elementary areas of the picture for deriving an. output field. A vector is assigned to an elementry area when its match error (calculated by applying the vector to an elementary area of an input field and summing the differences at a second input field} is below a certain level.
This embodiment of the present invention comes into operation when the match error for an elementary area exceeds this
predetermined level. In such a situation a block matcher is used on that picture area and a best fit vector derived. If the match error for this vector is lower than, that for the phase correlation derived vector and preferably also below the match error then it is assigned to that picture area.
The combined system uses the strengths of each method, a correctly assigned vector from the phase correlation has a very high confidence of being true motion and hence a dual system would have a priority for building pictures by this method. Where no good assignment can be made from the phase correlation technique the system will look at the match error of a block match derived vector.
The dual system will exploit the natural strengths of each technique and be less complex and more certain than current methods. A simulation using the parameters of a currently available block match integrated circuit confirms that the technique works for those regions of the picture that phase correlation finds difficult. The work to date has been carried out using a block size of 16 pixels and 8 field lines. The range of detected motions are approx +/- 16 pixels and +/- 8 field lines. Over this range of linear displacements either technique will work.
In the sole figure an embodiment of the invention is shown in which input video fields 2 are provided to a phase correlator 4 and a block matcher circuit 6.
The phase correlator 4 is of the type described in British Patent No. 2188510B and produces a correlation surface 8 at its output. This forms the input to a peak hunter circuit 10 which searches the correlation surface for the highest values thereon. These correspond to the peak motion vectors between a pair of input fields and these trial vectors are provided on outputs V1 -Vn which form inputs to assignment units 12. Typically the five highest peaks will be used as the set of trial vectors provided at the outputs.
Each assignment circuit 12 receives a single vector and tests each elementary area of an input field with that vector and produces an error signal in dependence on the error that vector generates in deriving one field from that input field. These errors 14 are provided in parallel to an error detector 16 for each elementary area in turn.
The minimum error signal detected by the error detector 16 is provided at an output coupled to an input A of a thresholding circuit 18. A second input B receives a threshold level. If the error A < B then a control signal for a vector selection 20 is generated which will then select the best assigned vector as determined by the error detection 20 for assignment to that particular elementary area of an input video field.
If the error A > B then a second output signal is generated by the thresholding circuit 18. This is an input to two AND gates 22 and 24 which receive their other inputs from a second
thresholding circuit 26, the operation of which will be described below.
The second thresholding circuit 26 receives an error signal from the block matcher circuit 6. This block matcher circuit operates on the same input video fields 2 as the phase correlator 4. It generates a best block match, vector 30 which is provided at an input of the vector selection circuit 20.
In the thresholding circuit 26 the block match error C is compared with a threshold D. If the error C < D then an output is generated which is coupled to the second output of AND gate 22. Thus if the phase correlation generates an error A greater than threshold B and the block matcher produces an error C less than a threshold D a logical 1 will be generated at the output of AND gate 22. This output is used to control selection circuit 20 to assign the best block match vector to the particular elementary area.
If the block match error C > D then a second output of the thresholding circuit 26 provides a signal on the second input of AND gate 24. Thus if both errors A > B and C > D neither the phase correlated vector nor the block match vector will be selected. Instead AND gate 24 will control selection circuit 20 to use a fallback mode for assigning a vector to the particular elementary area. This fallback mode could be a further vector generation and assignment technique.
It will be appreciated that there are not two motion estimators feeding trial vectors to competing assignment units in the circuit described above. This is because the vectors from the block matcher are generally less reliable than that of the phase correlator. Instead the block matcher is switched into use when the match error from the phase correlation derived vectors exceeds a predetermined level. The block size of the block matcher is fairly small and good results have been shown without any
assignment at all. It is also proposed that for improved
resolution in the image the block matches are overlapped 2:1 in both directions and the best vector assigned to the central 1/4 area of the block. It is also proposed to determine an estimate of subpixel movements by matching a 'V shape to the lower match error in the distortion map from the block matcher.
The vectors (probably only three plus a pan vector) from the phase correlator are assigned in a well known manner. A good match gives high confidence of being true motion. If the match is above some threshold then the block matcher is left to assign. If the block matcher also shows a high match error then a fallback method is used as before. This would comprise assiging a zero vector to that elementary area. In essence the block matcher is a more sophisticated fallback mode that will allow the processor to cope with most kinds of motion.
In a preferred system the match error is normalised by dividing it by the luminance gradient for the picture element in question. It is then compared with the threshold level to decide whether or not to use the block matcher. The reason for this normalisation is that a good match error for a picture with a lot of motion in it will be substantially different to a good match error for a picture with very little motion in it. Thus the normalisation by dividing by the luminance gradient will enable the same threshold level to be used for each picture.
The luminance gradient used for normalisation is the greatest value of luminance gradient at a picture element. It is calculated from a combination of the vertical and horizontal gradients.

Claims

1. A method for motion compensated image processing comprising the steps of producing vectors assigned to elementary areas of video fields from at least two fields in a sequence of video images by means of a first technique and switching to a second technique in response to an error signal produced by the first technique.
2. A method according to claim 1 in which the first technique comprises the steps of deriving a set of motion vectors from a phase correlation between input fields and assigning to an elementary area of a field the vector that gives the best fit in deriving one field from another.
3. A method according to claim 1 or 2 in which the second technique comprises a block matching technique.
4. A method according to claim 1, 2 or 3 including the step of switching to a third technique in response to error signals produced by the first and second techniques.
5. A method according to claim 4 in which the third technique comprises assigning a zero vector to an elementary area.
6. A method according to claim 3 in which the block matching means performs overlapping block matches.
7. A method according to claims 2 in which a predetermined number of motion vectors are used in the assigning step.
8. A method according to any preceding claim including the step of normalising the error in the derivation of an elementary area in the output.
9. A method according to claim 8 in which the normalising step comprises dividing the error for that elementary area by the luminance gradient for that elementary area.
10. Apparatus for motion compensated image processing comprising first means for producing and assigning vectors to elementary areas of video fields, second means for producing and assigning vectors to elementary areas of video fields, means for producing an error signal from the first producing and assigning means, and means for switching from the first to the second producing and assigning means in response to the error signal.
11. Apparatus for motion compensated image processing according to claim 10 in which the first producing and assigning means comprises phase correlation means.
12. Apparatus for motion compensated image processing according to claim 10 or 11 in which the second producing and assigning means comprises block matching means.
13. Apparatus for motion compensated image processing according to claim 10, 11 or 12 including third vector producing and assigning means and in which the switching means switches to the third vector producing and assigning means in response to error signals from the first and second producing and assigning means.
14. Apparatus for motion compensated image processing according to claim 10, 11, 12 or 13 including means for normalising errors in the derivation of an elementry area in an output field.
PCT/GB1993/000403 1992-02-26 1993-02-26 Motion compensated video image processing WO1993017525A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB9417278A GB2279200B (en) 1992-02-26 1993-02-26 Motion compensated video image processing
DE69320461T DE69320461T2 (en) 1992-02-26 1993-02-26 Motion compensated video image processing
EP93904265A EP0628234B1 (en) 1992-02-26 1993-02-26 Motion compensated video image processing
JP5514672A JPH07504304A (en) 1992-02-26 1993-02-26 Motion compensated video image processing method and apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB929204117A GB9204117D0 (en) 1992-02-26 1992-02-26 Video image processing
GB9204117.7 1992-02-26

Publications (1)

Publication Number Publication Date
WO1993017525A1 true WO1993017525A1 (en) 1993-09-02

Family

ID=10711092

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1993/000403 WO1993017525A1 (en) 1992-02-26 1993-02-26 Motion compensated video image processing

Country Status (8)

Country Link
US (1) US5940145A (en)
EP (1) EP0628234B1 (en)
JP (1) JPH07504304A (en)
CN (1) CN1078340A (en)
AU (1) AU3572293A (en)
DE (1) DE69320461T2 (en)
GB (2) GB9204117D0 (en)
WO (1) WO1993017525A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0695096B1 (en) * 1994-07-27 2000-03-22 Sony Corporation Apparatus for detecting motion vector

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07250328A (en) * 1994-01-21 1995-09-26 Mitsubishi Electric Corp Moving vector detector
KR100224752B1 (en) * 1997-06-11 1999-10-15 윤종용 Target tracking method and apparatus
US6496184B1 (en) * 1998-11-30 2002-12-17 William T. Freeman Method for inferring scenes from test images and training data using probability propagation in a markov network
US6473460B1 (en) * 2000-03-31 2002-10-29 Matsushita Electric Industrial Co., Ltd. Method and apparatus for calculating motion vectors
US6665450B1 (en) * 2000-09-08 2003-12-16 Avid Technology, Inc. Interpolation of a sequence of images using motion analysis
JP4106874B2 (en) * 2001-02-05 2008-06-25 ソニー株式会社 Image processing apparatus and method, and recording medium
US7043058B2 (en) * 2001-04-20 2006-05-09 Avid Technology, Inc. Correcting motion vector maps for image processing
US7545957B2 (en) * 2001-04-20 2009-06-09 Avid Technology, Inc. Analyzing motion of characteristics in images
US7194676B2 (en) 2002-03-01 2007-03-20 Avid Technology, Inc. Performance retiming effects on synchronized data in an editing system
AU2003265075A1 (en) * 2002-10-22 2004-05-13 Koninklijke Philips Electronics N.V. Image processing unit with fall-back
US7136506B2 (en) * 2003-03-03 2006-11-14 Lockheed Martin Corporation Correlation based in frame video tracker
US7751482B1 (en) * 2004-02-27 2010-07-06 Vbrick Systems, Inc. Phase correlation based motion estimation in hybrid video compression
US8000392B1 (en) 2004-02-27 2011-08-16 Vbrick Systems, Inc. Phase correlation based motion estimation in hybrid video compression
US8265145B1 (en) 2006-01-13 2012-09-11 Vbrick Systems, Inc. Management and selection of reference frames for long term prediction in motion estimation
US8488007B2 (en) * 2010-01-19 2013-07-16 Sony Corporation Method to estimate segmented motion
US8285079B2 (en) * 2010-03-19 2012-10-09 Sony Corporation Method for highly accurate estimation of motion using phase correlation
US8896759B2 (en) 2010-10-26 2014-11-25 Sony Corporation Method to increase the accuracy of phase correlation motion estimation in low-bit-precision circumstances
US8842735B2 (en) * 2010-10-26 2014-09-23 Sony Corporation Method to improve detection of motion with phase correlation
US8792559B2 (en) 2010-10-26 2014-07-29 Sony Corporation Method to improve accuracy and reliability of motion estimated with phase correlation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0322956A1 (en) * 1987-12-22 1989-07-05 Koninklijke Philips Electronics N.V. Video encoding and decoding using an adpative filter
US4980764A (en) * 1988-06-24 1990-12-25 Etat Francais (Cnet) Method for the encoding of data for assistance in the reconstruction of a sub-sampled moving electronic image
WO1991014340A1 (en) * 1990-03-15 1991-09-19 Thomson Consumer Electronics S.A. Digital image processing including block edges filtering

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987005769A1 (en) * 1986-03-19 1987-09-24 British Broadcasting Corporation Tv picture motion measurement
GB2222500A (en) * 1988-09-05 1990-03-07 Philips Electronic Associated Picture motion measurement
FR2638874B1 (en) * 1988-11-10 1994-07-01 Thomson Csf METHOD FOR ESTIMATING THE MOVEMENT OF AT LEAST ONE TARGET IN A SUITE OF IMAGES, AND DEVICE FOR CARRYING OUT SAID METHOD
US5081531A (en) * 1989-01-11 1992-01-14 U.S. Philips Corporation Method and apparatus for processing a high definition television signal using motion vectors representing more than one motion velocity range
GB2231747B (en) * 1989-04-27 1993-07-07 Sony Corp Motion dependent video signal processing
GB2231745B (en) * 1989-04-27 1993-07-07 Sony Corp Motion dependent video signal processing
US5043807A (en) * 1989-05-23 1991-08-27 Zenith Electronics Corporation Three dimensional composite video motion detection
US5072293A (en) * 1989-08-29 1991-12-10 U.S. Philips Corporation Method of estimating motion in a picture signal
JP2860702B2 (en) * 1990-10-16 1999-02-24 シャープ株式会社 Motion vector detection device
US5175618A (en) * 1990-10-31 1992-12-29 Victor Company Of Japan, Ltd. Compression method for interlace moving image signals
JPH04207788A (en) * 1990-11-30 1992-07-29 Sony Corp Band compression device
JP3103894B2 (en) * 1991-02-06 2000-10-30 ソニー株式会社 Apparatus and method for correcting camera shake of video data
JP2677312B2 (en) * 1991-03-11 1997-11-17 工業技術院長 Camera work detection method
US5278663A (en) * 1991-06-28 1994-01-11 Samsung Electronics Co. Ltd. Method for compensating the vibration of an image and device therefor in a video camera
JP2507204B2 (en) * 1991-08-30 1996-06-12 松下電器産業株式会社 Video signal encoder
US5227878A (en) * 1991-11-15 1993-07-13 At&T Bell Laboratories Adaptive coding and decoding of frames and fields of video
SE469412B (en) * 1992-04-13 1993-06-28 Dv Sweden Ab MAKE ADAPTIVE ESTIMATES UNUSUAL GLOBAL IMAGE INSTABILITIES IN IMAGE SEQUENCES IN DIGITAL VIDEO SIGNALS
GB9217098D0 (en) * 1992-08-12 1992-09-23 British Broadcasting Corp Derivation of studio camera position and motion from the camera image
EP0697788A3 (en) * 1994-08-19 1997-03-26 Eastman Kodak Co Adaptive, global-motion compensated deinterlacing of sequential video fields with post processing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0322956A1 (en) * 1987-12-22 1989-07-05 Koninklijke Philips Electronics N.V. Video encoding and decoding using an adpative filter
US4980764A (en) * 1988-06-24 1990-12-25 Etat Francais (Cnet) Method for the encoding of data for assistance in the reconstruction of a sub-sampled moving electronic image
WO1991014340A1 (en) * 1990-03-15 1991-09-19 Thomson Consumer Electronics S.A. Digital image processing including block edges filtering

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Signal Processing: Image Communication, Volume 3, 1991, (Colchester), H.M. Ahmad Fadzil et al, "VIDEO SUBBAND VQ AT 64 kbit/s USING SHORT-KERNEL FILTER BANKS WITH AN IMPROVED MOTION ESTIMATION TECHNIQUE" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0695096B1 (en) * 1994-07-27 2000-03-22 Sony Corporation Apparatus for detecting motion vector

Also Published As

Publication number Publication date
CN1078340A (en) 1993-11-10
EP0628234B1 (en) 1998-08-19
GB9204117D0 (en) 1992-04-08
EP0628234A1 (en) 1994-12-14
DE69320461D1 (en) 1998-09-24
JPH07504304A (en) 1995-05-11
AU3572293A (en) 1993-09-13
US5940145A (en) 1999-08-17
DE69320461T2 (en) 1998-12-24
GB2279200A (en) 1994-12-21
GB2279200B (en) 1995-09-13
GB9417278D0 (en) 1994-10-19

Similar Documents

Publication Publication Date Title
US5940145A (en) Method and apparatus for motion compensated image processing using two separate motion measurement techniques
US5436674A (en) Method of detecting motion vector, apparatus therefor, and picture signal processing system utilizing the apparatus
US5748247A (en) Refinement of block motion vectors to achieve a dense motion field
EP0181215B1 (en) Apparatus for detecting motion of television images
EP0513047B1 (en) Three-frame technique for analyzing two motions in successive image frames dynamically
US5742710A (en) Computationally-efficient method for estimating image motion
US7010039B2 (en) Motion estimator for reduced halos in MC up-conversion
US4663665A (en) TV system conversion apparatus
WO1992019068A1 (en) A method for estimating motion contents in video signals
JPS6152084A (en) Highly efficient encoder
CA2212013A1 (en) Method for estimating the location of an image target region from tracked multiple image landmark regions
EP0722252B1 (en) Boundary matching motion estimation apparatus
KR20050089886A (en) Background motion vector detection
JPS61269475A (en) Detection system for dynamic vector
EP0734175A1 (en) Hierarchical motion vector estimation using multiple block sizes
KR20060083978A (en) Motion vector field re-timing
KR20050012766A (en) Unit for and method of estimating a motion vector
EP0632915B1 (en) A machine method for compensating for non-linear picture transformations, e.g. zoom and pan, in a video image motion compensation system
EP0367310B1 (en) Picture motion measurement
WO2004082294A1 (en) Method for motion vector determination
JPH09182077A (en) Image encoding method and device
US6044114A (en) Method of image segmentation
WO1995024096A1 (en) Motion estimation
JPS6225587A (en) Detector circuit for moving vector
JPH06350972A (en) Motion detector for picture signal

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU BG BR CA CZ FI GB HU JP KR NO RU SK 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 IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 1993904265

Country of ref document: EP

ENP Entry into the national phase

Ref country code: US

Ref document number: 1994 290969

Date of ref document: 19940929

Kind code of ref document: A

Format of ref document f/p: F

WWP Wipo information: published in national office

Ref document number: 1993904265

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: CA

WWG Wipo information: grant in national office

Ref document number: 1993904265

Country of ref document: EP