JP5594968B2 - ビデオ画像間の運動を確定するための方法と装置 - Google Patents
ビデオ画像間の運動を確定するための方法と装置 Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/20—Analysis of motion
- G06T7/223—Analysis of motion using block-matching
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- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
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- H04N19/423—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements
- H04N19/426—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements using memory downsizing methods
- H04N19/428—Recompression, e.g. by spatial or temporal decimation
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- 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
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- H—ELECTRICITY
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- 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
- H04N19/513—Processing of motion vectors
- H04N19/521—Processing of motion vectors for estimating the reliability of the determined motion vectors or motion vector field, e.g. for smoothing the motion vector field or for correcting motion vectors
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- 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
- H04N19/57—Motion estimation characterised by a search window with variable size or shape
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- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
- H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
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- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/144—Movement detection
- H04N5/145—Movement estimation
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Description
・ブロックマッチング技法: section II of De Haan, G.,Biezen, P.W.A.C. “An efficient true-motion estimator using candidate vectors from a parametric motion model” Circuits and Systems for Video Technology, IEEE Transaction on Vol.8, Issue 1, Feb 1998, pp 85-91 に記載されている。
・勾配に基づく技法:Horn, B.K.P. & B.G. Schunck, “Determining Optical Flow,” Artificial Intelligence, Vol.16, No.1-3, August 1981, pp.185-203 に記載されている。
・運動推定を最も正確に行う必要のある方向;
・画素の数を減らすために情報を失うのが許容されるか否か;
・ブロックの運動の強さ;
・比較ブロックとして使用されることになる検索区域内の画素のブロックの場所。
これは、水平及び垂直方向の挿間を必要とする画素の対する2段階演算処理へと僅かに拡張されている。
Claims (10)
- 第1及び第2のビデオ画像の間の運動を確定するための方法において、
複数の画素を備えている第1ビデオ画像を受け取る段階と、
前記第1ビデオ画像内の画素のブロックを選択する段階と、
複数の画素を備えている第2ビデオ画像を受け取る段階と、
前記第2ビデオ画像の少なくとも一部分を選択して検索区域を作る段階と、
前記検索区域の画素を、所定のパターンで標本採取する段階と、
前記第1ビデオ画像内の前記選択された画素のブロックを、前記検索区域の少なくとも1つの標本採取された画素のブロックを挿間処理することにより生成された画素のブロックと比較して、前記両画像の間の前記画素のブロックの運動を確定する段階と、から成り、
前記標本採取される画素のパターンは、前記検索区域によって異なり、
前記標本採取する段階は、前記検索区域の前記画素を副次採取する段階を更に含み、前記副次採取の程度は、前記検索区域の中心からの距離が遠くなると、上がり、
前記第2ビデオ画像内の前記検索区域の位置は、前記第1ビデオ画像の画素のブロックの位置上に、中心が合わせられ、
前記標本採取される画素のパターンは、運動推定が最も正確であることを要求される方向に依存している、
ことを特徴とする方法。 - 前記標本採取される画素のパターンは、画素情報の損失が受容される程度に依存している、請求項1に記載の方法。
- 前記標本採取される画素のパターンは、比較に使用される前記検索区域の副次標本採取される画素のブロックの位置に依存している、請求項1又は2に記載の方法。
- 前記パターンは、前記検索区域の中心に高い解像度の画素を含んでいる、請求項1、2又は3に記載の方法。
- 前記画素のパターンは、前記検索区域内で水平及び垂直方向に標本採取することを含んでいる、請求項1、2、3又は4に記載の方法。
- 第1及び第2のビデオ画像の間の運動を確定するための装置において、
複数の画素を備えている第1ビデオ画像を受け取るための手段と、
前記第1ビデオ画像内の画素のブロックを選択するための手段と、
複数の画素を備えている第2ビデオ画像を受け取るための手段と、
前記第2ビデオ画像の少なくとも一部分を選択して検索区域を作るための手段と、
前記検索区域の画素を、所定のパターンで標本採取するための手段と、
前記第1ビデオ画像内の前記選択された画素のブロックを、前記検索区域の少なくとも1つの標本採取された画素のブロックを挿間処理することにより生成された画素のブロックと比較して、前記両画像の間の前記画素のブロックの運動を確定するための手段と、を備えており、
前記標本採取する段階は、前記検索区域の前記画素を副次採取する段階を更に含み、前記副次採取の程度は、前記検索区域の中心からの距離が遠くなると、上がり、
前記第2ビデオ画像内の前記検索区域の位置は、前記第1ビデオ画像の画素のブロックの位置上に、中心が合わせられ、
前記標本採取される画素のパターンは、運動推定が最も正確であることを要求される方向に依存している、
ことを特徴とする装置。 - 前記標本採取される画素のパターンは、画素情報の損失が受容される程度に依存している、請求項6に記載の装置。
- 前記標本採取される画素のパターンは、比較に使用される前記検索区域の前記少なくとも1つの標本採取される画素のブロックの位置に依存している、請求項6又は7に記載の装置。
- 前記パターンは、前記検索区域の中心に高い解像度の画素を含んでいる、請求項6又は7に記載の装置。
- 前記画素のパターンは、前記検索区域内で水平及び垂直方向に標本採取することを含んでいる、請求項6に記載の装置。
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GB0603180.1 | 2006-02-16 | ||
GB0603180A GB2435360B (en) | 2006-02-16 | 2006-02-16 | Method and apparatus for determining motion between video images |
PCT/GB2007/000462 WO2007093768A1 (en) | 2006-02-16 | 2007-02-09 | Method and apparatus for determining motion between video images |
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GB2435360B (en) | 2009-09-23 |
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US8130837B2 (en) | 2012-03-06 |
US20070217517A1 (en) | 2007-09-20 |
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