JP2011028640A5 - - Google Patents
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- JP2011028640A5 JP2011028640A5 JP2009175543A JP2009175543A JP2011028640A5 JP 2011028640 A5 JP2011028640 A5 JP 2011028640A5 JP 2009175543 A JP2009175543 A JP 2009175543A JP 2009175543 A JP2009175543 A JP 2009175543A JP 2011028640 A5 JP2011028640 A5 JP 2011028640A5
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Claims (12)
入力画像において補間画素に対応する補間注目座標の近傍に存在する複数の入力画素である補間周辺画素を抽出し、前記補間周辺画素に含まれるエッジの角度である検出角度、および、前記補間周辺画素が前記エッジを含むことの信頼度を示す検出信頼度を検出する角度検出部と、
前記補間周辺画素を構成する入力画素のそれぞれについて、当該入力画素を中心とする領域に含まれるエッジの角度である補間注目周辺角度を検出し、当該補間注目周辺角度の種類数である多様度を検出する多様度検出部と、
前記補間注目周辺角度のうち、最も個数の多い角度を最頻角として検出する最頻角検出部と、
前記多様度と前記最頻角を用いて前記補間注目座標の検出角度を修正して修正角度を求める角度修正部と、
前記補間周辺画素のそれぞれについて、前記補間注目座標から見て前記修正角度の方向にある補間周辺画素に適用される値が大きくなるような第１の補間係数と、前記修正角度の方向に関わりなく値が定まる第２の補間係数を決定し、前記検出信頼度が大きいほど前記第１の補間係数が前記第２の補間係数より大きくなるように重みづけを行い、前記第１の補間係数、前記第２の補間係数および前記補間周辺画素の画素値に基づいて前記補間画素の画素値を算出する演算部と、
を備える解像度変換装置。 A resolution conversion device that generates an interpolation pixel based on a pixel value of an input pixel included in an input image and creates an output image having a resolution different from that of the input image,
In the input image, a plurality of input peripheral pixels that are present in the vicinity of the interpolation target coordinate corresponding to the interpolation pixel are extracted, a detection angle that is an angle of an edge included in the interpolation peripheral pixel, and the interpolation peripheral pixel An angle detector for detecting a detection reliability indicating a reliability of including the edge;
For each of the input pixels constituting the interpolation peripheral pixel, an interpolation attention peripheral angle that is an angle of an edge included in a region centered on the input pixel is detected, and the diversity that is the number of types of the interpolation attention peripheral angle is determined. A diversity detector to detect;
Of the interpolated attention peripheral angles, the most frequent angle detection unit that detects the most frequent angle as the most frequent angle;
An angle correction unit for correcting a detection angle of the interpolated attention coordinate using the diversity and the mode angle to obtain a correction angle;
For each of the interpolation peripheral pixels, a first interpolation coefficient that increases the value applied to the interpolation peripheral pixels in the direction of the correction angle as viewed from the interpolation attention coordinate, regardless of the direction of the correction angle. Determining a second interpolation coefficient whose value is determined, weighting the first interpolation coefficient to be larger than the second interpolation coefficient as the detection reliability increases, and the first interpolation coefficient, A calculation unit that calculates a pixel value of the interpolation pixel based on a second interpolation coefficient and a pixel value of the interpolation peripheral pixel;
A resolution conversion apparatus comprising:
請求項１に記載の解像度変換装置。 The resolution conversion according to claim 1, wherein the angle correction unit uses the mode angle as a correction angle if the diversity is smaller than a predetermined value and the detection angle is different from the mode angle. apparatus.
前記多様度と前記最頻角の信頼度を用いて検出信頼度を修正し、修正信頼度を求める信頼度修正部と、
をさらに備え、
前記演算部は、前記検出信頼度に替えて前記修正信頼度を使用して補間画素の画素値を
算出する
請求項１または２に記載の解像度変換装置。 A mode angle reliability detection unit for determining the reliability of the mode angle;
A reliability correction unit for correcting the detection reliability using the diversity and the reliability of the most frequent angle, and obtaining a correction reliability;
Further comprising
The resolution conversion apparatus according to claim 1, wherein the calculation unit calculates a pixel value of an interpolation pixel using the correction reliability instead of the detection reliability.
前記最頻角信頼度検出部は、前記補間注目周辺信頼度の和を、前記最頻角と前記補間注目周辺角度が一致した数で除算して、前記最頻角の信頼度を求め、
前記信頼度修正部は、前記多様度が所定の値より小さく、かつ、前記検出角度と前記最頻角が異なっていれば、修正信頼度として前記最頻角の信頼度を使用する
請求項３に記載の解像度変換装置。 The diversity detection unit further detects an interpolation attention peripheral reliability which is a probability that an edge is included in the region where the interpolation attention peripheral angle is detected,
The most frequent angle reliability detection unit divides the sum of the interpolated attention peripheral reliability by the number of coincidence of the most frequent angle and the interpolated attention peripheral angle to obtain the reliability of the most frequent angle,
4. The reliability correction unit uses the reliability of the most frequent angle as a correction reliability when the diversity is smaller than a predetermined value and the detected angle is different from the most frequent angle. The resolution converter described in 1.
前記一致数に基づいて前記修正信頼度をさらに修正し、再修正信頼度を求める信頼度再修正部と、
をさらに備え、
前記演算部は、前記修正信頼度に替えて前記再修正信頼度を使用して補間画素の画素値を算出する
請求項３または４に記載の解像度変換装置。 An angle verification unit that compares the correction angle with the interpolation attention peripheral angle that is present in the direction of the correction angle as seen from the interpolation attention coordinate, and obtains the number of matches;
A reliability recorrection unit that further corrects the correction reliability based on the number of matches and obtains a recorrection reliability;
Further comprising
The resolution conversion apparatus according to claim 3 or 4, wherein the calculation unit calculates a pixel value of an interpolation pixel using the re-correction reliability instead of the correction reliability.
請求項５に記載の解像度変換装置。 The angle verification unit obtains the number of coincidence by comparing the correction angle with a correction angle obtained for an input pixel corresponding to an interpolation target peripheral angle existing in the direction of the correction angle. The resolution converter described.
入力画像において補間画素に対応する補間注目座標の近傍に存在する複数の入力画素である補間周辺画素を抽出し、前記補間周辺画素に含まれるエッジの角度である検出角度、および、前記補間周辺画素が前記エッジを含むことの信頼度を示す検出信頼度を検出する角度検出工程と、
前記補間周辺画素を構成する入力画素のそれぞれについて、当該入力画素を中心とする領域に含まれるエッジの角度である補間注目周辺角度を検出し、当該補間注目周辺角度の種類数である多様度を検出する多様度検出工程と、
前記補間注目周辺角度のうち、最も個数の多い角度を最頻角として検出する最頻角検出工程と、
前記多様度と前記最頻角を用いて前記補間注目座標の検出角度を修正して修正角度を求める角度修正工程と、
前記補間周辺画素のそれぞれについて、前記補間注目座標から見て前記修正角度の方向にある補間周辺画素に適用される値が大きくなるような第１の補間係数と、前記修正角度の方向に関わりなく値が定まる第２の補間係数を決定し、前記検出信頼度が大きいほど前記第１の補間係数が前記第２の補間係数より大きくなるように重みづけを行い、前記第１の補間係数、前記第２の補間係数および前記補間周辺画素の画素値に基づいて前記補間画素の画素値を算出する演算工程と、
を有する解像度変換方法。 A resolution conversion method for generating an interpolation pixel based on a pixel value of an input pixel included in an input image, and creating an output image having a resolution different from that of the input image,
In the input image, a plurality of input peripheral pixels that are present in the vicinity of the interpolation target coordinate corresponding to the interpolation pixel are extracted, a detection angle that is an angle of an edge included in the interpolation peripheral pixel, and the interpolation peripheral pixel An angle detection step of detecting a detection reliability indicating the reliability of including the edge;
For each of the input pixels constituting the interpolation peripheral pixel, an interpolation attention peripheral angle that is an angle of an edge included in a region centered on the input pixel is detected, and the diversity that is the number of types of the interpolation attention peripheral angle is determined. A diversity detection process to detect ;
Of the interpolation attention peripheral angles, the most frequent angle detection step of detecting the most frequent angle as the most frequent angle ;
An angle correction step of determining a correction angle by correcting a detection angle of the interpolation attention coordinate using the diversity and the mode angle;
For each of the interpolation peripheral pixels, a first interpolation coefficient that increases the value applied to the interpolation peripheral pixels in the direction of the correction angle as viewed from the interpolation attention coordinate, regardless of the direction of the correction angle. Determining a second interpolation coefficient whose value is determined, weighting the first interpolation coefficient to be larger than the second interpolation coefficient as the detection reliability increases, and the first interpolation coefficient, A calculation step of calculating a pixel value of the interpolation pixel based on a second interpolation coefficient and a pixel value of the interpolation peripheral pixel;
A resolution conversion method.
請求項７に記載の解像度変換方法。The resolution conversion method according to claim 7.
前記多様度と前記最頻角の信頼度を用いて検出信頼度を修正し、修正信頼度を求める信頼度修正工程と、 A reliability correction step for correcting a detection reliability using the diversity and the reliability of the most frequent angle to obtain a correction reliability;
をさらに有し、Further comprising
前記演算工程では、前記検出信頼度に替えて前記修正信頼度を使用して補間画素の画素値を算出する In the calculation step, the pixel value of the interpolation pixel is calculated using the correction reliability instead of the detection reliability.
請求項７または８に記載の解像度変換方法。The resolution conversion method according to claim 7 or 8.
前記最頻角信頼度検出工程では、前記補間注目周辺信頼度の和を、前記最頻角と前記補間注目周辺角度が一致した数で除算して、前記最頻角の信頼度を求め、 In the most frequent angle reliability detection step, the sum of the interpolated attention peripheral reliability is divided by the number of coincidence of the most frequent angle and the interpolated attention peripheral angle to obtain the reliability of the most frequent angle,
前記信頼度修正工程では、前記多様度が所定の値より小さく、かつ、前記検出角度と前記最頻角が異なっていれば、修正信頼度として前記最頻角の信頼度を使用する In the reliability correction step, if the diversity is smaller than a predetermined value and the detected angle is different from the most frequent angle, the reliability of the most frequent angle is used as a modified reliability.
請求項８に記載の解像度変換方法。The resolution conversion method according to claim 8.
前記一致数に基づいて前記修正信頼度をさらに修正し、再修正信頼度を求める信頼度再修正工程と、 A reliability recorrection step of further correcting the correction reliability based on the number of matches and obtaining a recorrection reliability;
をさらに有し、Further comprising
前記演算工程では、前記修正信頼度に替えて前記再修正信頼度を使用して補間画素の画素値を算出する In the calculation step, the pixel value of the interpolation pixel is calculated using the re-correction reliability instead of the correction reliability.
請求項９または１０に記載の解像度変換方法。The resolution conversion method according to claim 9 or 10.
請求項１１に記載の解像度変換方法。The resolution conversion method according to claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009175543A JP5322824B2 (en) | 2009-07-28 | 2009-07-28 | Resolution conversion apparatus and resolution conversion method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009175543A JP5322824B2 (en) | 2009-07-28 | 2009-07-28 | Resolution conversion apparatus and resolution conversion method |
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| Publication Number | Publication Date |
|---|---|
| JP2011028640A JP2011028640A (en) | 2011-02-10 |
| JP2011028640A5 true JP2011028640A5 (en) | 2012-09-13 |
| JP5322824B2 JP5322824B2 (en) | 2013-10-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101937163B1 (en) * | 2012-07-10 | 2019-04-09 | 삼성전자주식회사 | Method for directional adaptive image interpolation and an electronic device thereof |
| JP6009903B2 (en) * | 2012-10-24 | 2016-10-19 | シャープ株式会社 | Image processing device |
| JP6469398B2 (en) * | 2014-09-19 | 2019-02-13 | 株式会社デンソーテン | Image processing apparatus, image processing method, and program |
| JP6473608B2 (en) | 2014-11-27 | 2019-02-20 | 三星ディスプレイ株式會社Ｓａｍｓｕｎｇ Ｄｉｓｐｌａｙ Ｃｏ．，Ｌｔｄ． | Image processing apparatus, image processing method, and program |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11191861A (en) * | 1997-12-25 | 1999-07-13 | Canon Inc | Image processing unit and image processing system |
| JP2000057355A (en) * | 1998-08-06 | 2000-02-25 | Nippon Telegr & Teleph Corp <Ntt> | Area extracting device and image processor |
| JP4150947B2 (en) * | 2000-08-23 | 2008-09-17 | ソニー株式会社 | Image processing apparatus and method, and recording medium |
| JP2003196651A (en) * | 2001-12-25 | 2003-07-11 | Mitsubishi Electric Corp | Image compression restoration method |
| JP4487179B2 (en) * | 2004-03-16 | 2010-06-23 | ソニー株式会社 | Image processing apparatus and method, recording medium, and program |
| JP4635652B2 (en) * | 2005-03-08 | 2011-02-23 | ソニー株式会社 | Image processing apparatus, image processing method, program for image processing method, and recording medium recording program for image processing method |
| JP4710635B2 (en) * | 2006-02-07 | 2011-06-29 | ソニー株式会社 | Image processing apparatus and method, recording medium, and program |
| JP4898531B2 (en) * | 2007-04-12 | 2012-03-14 | キヤノン株式会社 | Image processing apparatus, control method therefor, and computer program |
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