JP2005142673A5 - - Google Patents

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JP2005142673A5
JP2005142673A5 JP2003374819A JP2003374819A JP2005142673A5 JP 2005142673 A5 JP2005142673 A5 JP 2005142673A5 JP 2003374819 A JP2003374819 A JP 2003374819A JP 2003374819 A JP2003374819 A JP 2003374819A JP 2005142673 A5 JP2005142673 A5 JP 2005142673A5
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wavelet transform
frequency component
pixel
image
dimensional wavelet
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JP2003374819A
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２次元画像データに対し、ウェーブレット変換を行う画像処理装置であって、
前記２次元画像データを構成する縦画像ライン又は横画像ライン単位で１次元ウェーブレット変換を行う１次元ウェーブレット変換処理手段を有し、
前記１次元ウェーブレット変換処理手段が、
高域周波数成分と低域周波数成分とが交互に出現するように前記画素ラインを変換するとともに、
隣り合う画素ラインにおいては、前記高周波成分と前記低周波成分との出現順序を逆転させて変換を行うことを特徴とする画像処理装置。 An image processing apparatus that performs wavelet transform on two-dimensional image data,
One-dimensional wavelet transform processing means for performing one-dimensional wavelet transform in units of vertical image lines or horizontal image lines constituting the two-dimensional image data;
The one-dimensional wavelet transform processing means is
Converting the pixel line so that a high-frequency component and a low-frequency component appear alternately,
An image processing apparatus that performs conversion by reversing the order of appearance of the high-frequency component and the low-frequency component in adjacent pixel lines. 前記１次元ウェーブレット変換処理手段によって行なわれる演算が、高周波成分を得るための第１の演算と、低周波成分を得るための第２の演算とから構成され、前記１次元ウェーブレット変換処理手段が前記画素ライン毎に前記第１の演算と前記第２の演算の順序を入れ替えた演算を施すことを特徴とする請求項１記載の画像処理装置。 The calculation performed by the one-dimensional wavelet transform processing means is composed of a first calculation for obtaining a high-frequency component and a second calculation for obtaining a low-frequency component, and the one-dimensional wavelet transform processing means The image processing apparatus according to claim 1, wherein an operation in which the order of the first operation and the second operation is switched is performed for each pixel line. １つのインタレース画像を構成する２つのフィールド画像に独立してウェーブレット変換を行う画像処理装置であって、
前記フィールド画像データを構成する縦画像ライン又は横画像ライン単位で１次元ウェーブレット変換を行う１次元ウェーブレット変換処理手段と、
前記フィールド画像データの一方に対し、各画素の横方向のアドレスに奇数のオフセットを付加するオフセット付加手段とを有し、
前記１次元ウェーブレット変換処理手段が、
前記画素ラインに含まれる画素の横方向のアドレスが奇数である画素に対しては高域周波数成分又は低域周波数成分の一方が出現するように、偶数である画素に対しては高域周波数成分又は低域周波数成分の他方が出現するように前記画素ラインを変換することを特徴とする画像処理装置。 An image processing apparatus that performs wavelet transform independently on two field images constituting one interlaced image,
One-dimensional wavelet transform processing means for performing one-dimensional wavelet transform in units of vertical image lines or horizontal image lines constituting the field image data;
Offset adding means for adding an odd offset to the horizontal address of each pixel with respect to one of the field image data;
The one-dimensional wavelet transform processing means is
Wherein as address in the lateral direction of the pixel included in the pixel line is one of the high frequency component or the low frequency components appear for the pixel is odd, the high frequency components for the pixel is even Alternatively, the pixel line is converted so that the other of the low frequency components appears. ２次元画像データに対し、ウェーブレット変換を行う画像処理方法であって、
前記２次元画像データを構成する縦画像ライン又は横画像ライン単位で１次元ウェーブレット変換を行う１次元ウェーブレット変換処理ステップを有し、
前記１次元ウェーブレット変換処理ステップが、
高域周波数成分と低域周波数成分とが交互に出現するように前記画素ラインを変換するとともに、
隣り合う画素ラインにおいては、前記高周波成分と前記低周波成分との出現順序を逆転させて変換を行うことを特徴とする画像処理方法。 An image processing method for performing wavelet transform on two-dimensional image data,
A one-dimensional wavelet transform processing step for performing a one-dimensional wavelet transform in units of vertical image lines or horizontal image lines constituting the two-dimensional image data;
The one-dimensional wavelet transform processing step includes:
Converting the pixel line so that high frequency components and low frequency components appear alternately,
An image processing method comprising performing conversion by reversing the order of appearance of the high frequency component and the low frequency component in adjacent pixel lines. 前記１次元ウェーブレット変換処理ステップによって行なわれる演算が、高周波成分を得るための第１の演算と、低周波成分を得るための第２の演算とから構成され、前記１次元ウェーブレット変換処理ステップが前記画素ライン毎に前記第１の演算と前記第２の演算の順序を入れ替えた演算を施すことを特徴とする請求項４記載の画像処理方法。 The calculation performed by the one-dimensional wavelet transform processing step is composed of a first calculation for obtaining a high-frequency component and a second calculation for obtaining a low-frequency component, and the one-dimensional wavelet transform processing step comprises The image processing method according to claim 4, wherein an operation in which an order of the first operation and the second operation is exchanged is performed for each pixel line. １つのインタレース画像を構成する２つのフィールド画像に独立してウェーブレット変換を行う画像処理方法であって、
前記フィールド画像データを構成する縦画像ライン又は横画像ライン単位で１次元ウェーブレット変換を行う１次元ウェーブレット変換処理ステップと、
前記フィールド画像データの一方に対し、各画素の横方向のアドレスに奇数のオフセットを付加するオフセット付加ステップとを有し、
前記１次元ウェーブレット変換処理ステップが、
前記画素ラインに含まれる画素の横方向のアドレスが奇数である画素に対しては高域周波数成分又は低域周波数成分の一方が出現するように、偶数である画素に対しては高域周波数成分又は低域周波数成分の他方が出現するように前記画素ラインを変換することを特徴とする画像処理方法。 An image processing method for performing wavelet transform independently on two field images constituting one interlaced image,
A one-dimensional wavelet transform processing step for performing a one-dimensional wavelet transform in units of vertical image lines or horizontal image lines constituting the field image data;
An offset addition step of adding an odd offset to the horizontal address of each pixel with respect to one of the field image data;
The one-dimensional wavelet transform processing step includes:
The high frequency component is applied to a pixel that is an even number, such that one of a high frequency component or a low frequency component appears for a pixel that has an odd horizontal address in the pixel line. Alternatively, the pixel line is converted so that the other of the low frequency components appears. コンピュータに、請求項４乃至請求項６のいずれか１項に記載の画像処理方法に記載の各工程を実行させるためのプログラム。 The computer program for executing the steps according to the image processing method according to any one of claims 4 to 6. 請求項７記載のプログラムを記録したコンピュータ読み取り可能な記録媒体。 Computer read-capable recording medium recording the claim 7, wherein the program.
JP2003374819A 2003-11-04 2003-11-04 Image processing method and apparatus Expired - Fee Related JP4194472B2 (en)

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Publications (3)

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JP2005142673A5 true JP2005142673A5 (en) 2006-12-21
JP4194472B2 JP4194472B2 (en) 2008-12-10

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KR101442273B1 (en) 2007-05-17 2014-09-23 소니 주식회사 Information processing device and method
WO2008143157A1 (en) 2007-05-17 2008-11-27 Sony Corporation Information processing device and method
JP4821835B2 (en) * 2008-05-16 2011-11-24 ソニー株式会社 Information processing apparatus and method
CN101631243B (en) * 2009-08-07 2011-10-26 清华大学 Image encoding/decoding method based on wavelet transformation

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