JP2009527059A - 画像ぼかし処理 - Google Patents
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- JP2009527059A JP2009527059A JP2008555442A JP2008555442A JP2009527059A JP 2009527059 A JP2009527059 A JP 2009527059A JP 2008555442 A JP2008555442 A JP 2008555442A JP 2008555442 A JP2008555442 A JP 2008555442A JP 2009527059 A JP2009527059 A JP 2009527059A
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- 238000004458 analytical method Methods 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 claims 5
- 230000005540 biological transmission Effects 0.000 claims 2
- 238000011946 reduction process Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 6
- 230000011218 segmentation Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/18—Focusing aids
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/20—Image enhancement or restoration using local operators
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/50—Image enhancement or restoration using two or more images, e.g. averaging or subtraction
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/73—Deblurring; Sharpening
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/90—Dynamic range modification of images or parts thereof
- G06T5/94—Dynamic range modification of images or parts thereof based on local image properties, e.g. for local contrast enhancement
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/741—Circuitry for compensating brightness variation in the scene by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10141—Special mode during image acquisition
- G06T2207/10144—Varying exposure
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20004—Adaptive image processing
- G06T2207/20012—Locally adaptive
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20172—Image enhancement details
- G06T2207/20208—High dynamic range [HDR] image processing
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Image Processing (AREA)
- Studio Devices (AREA)
Abstract
Description
畳み込みの結果、結果物であるぼかされた画像は背景中のコントラストとシャープネスを欠くこととなり、それゆえに魅力に乏しい視覚的効果が生成される。このようなぼかし技術は単に実際に近い結果物を得ることができないだけでなく、所望される浅いDOFの画像とも類似しない。
また、それらが組み合わされてもよい。
Claims (20)
- 取得画像のぼかしを実行可能であるデジタル画像処理デバイスであって、
制御部と、プロッセッサが読み取り可能なコードを有する1つ以上のプロセッサ読み取り可能な格納デバイスとを備え、
前記プロセッサが読み取り可能なコードは、1つ以上のプロセッサについてデジタル画像中にぼかしを生成する方法を実行するようにプログラムし、
前記方法は、
(a)第1の露出レベルで撮像された被写体の第1の画像を取得することと;、
(b)みかけ上同じ被写体について第2の露出レベルで撮像され、少なくとも1つの領域が飽和輝度値を有する1つ以上のピクセルを含む第2の画像を取得することと;、
(c)前記飽和したピクセルの少なくとも1つについて、前記第1の画像から1つ以上の値を推定することと;、
(d)不飽和値を有する前記第2の画像のピクセルと、前記1つ以上の推定された値を有するピクセルとを含む第3の画像を生成することと;、
(e)前記第3の画像の少なくとも一部分をぼかすことと;、
(f)前記第3の画像のぼかされた部分を再拡大縮小することと;を備えることを特徴とするデジタル画像処理デバイス。 - 前記第1の画像はフラッシュなしで取得され、前記第2の画像はフラッシュ露出レベルで取得されることを特徴とする請求項1に記載のデジタル画像処理デバイス。
- 飽和したピクセルの値の推定処理は、
前記第1の画像中のピクセルの輝度の、少なくとも1つの不飽和ピクセルの輝度に対する少なくとも1つの比率を算出することと、
前記輝度の比率に基づいて、選択されたピクセルについての前記推定値を提供することとを備える請求項1に記載のデジタル画像処理デバイス。 - 前記不飽和ピクセルは、飽和クリッピングが実行されていない前記第2の画像中のピクセルに相当する前記第1の画像中のピクセルを含むことを特徴とする請求項3に記載のデジタル画像処理デバイス。
- 前記方法が、
画像の前景に相当する前記第3の画像の1つ以上の部分と、画像の背景に相当する部分とを決定することと;、
前記背景部分をぼかすこととをさらに備えることを特徴とする請求項1に記載のデジタル画像処理デバイス。 - 前記第3の画像のぼかし処理が、前記少なくとも1つの部分に少なくとも1つの畳み込みカーネルを適用することを含むことを特徴とする請求項1に記載のデジタル画像処理デバイス。
- 前記カーネルが円形カーネルを含むことを特徴とする請求項6に記載のデジタル画像処理デバイス。
- 前記第3の画像が、前記飽和した輝度値を前記推定値に置き換えることにより修正された前記第2の画像のコピーを含むことを特徴とする請求項1に記載のデジタル画像処理デバイス。
- 前記第3の画像が、前記飽和した輝度値を前記推定値に置き換えることにより修正された前記第2の画像を含むことを特徴とする請求項1に記載のデジタル画像処理デバイス。
- 前記再拡大縮小処理が、前記第3の画像の前記ぼかされた部分を前記第2の画像と関連するレンジ(range)に拡大縮小することを含むことを特徴とする請求項1に記載のデジタル画像処理デバイス。
- 取得画像のぼかしを実行可能なデジタル画像処理デバイスであって、
制御部と、プロッセッサが読み取り可能なコードを有する1つ以上のプロセッサ読み取り可能な格納デバイスとを備え、
前記プロセッサが読み取り可能なコードは、1つ以上のプロセッサについてデジタル画像を生成する方法を実行するようにプログラムし、
前記方法は、
(a)輝度値が飽和した1つ以上のピクセルを有する最大解像度の画像を含む少なくとも2つの画像を取得することと;、
(b)少なくとも2つの取得画像のうちの他方の画像の不飽和ピクセルから1つ以上の輝度ピクセルを決定することと;、
(c)前記他方の取得画像の不飽和ピクセルから決定された1つ以上の輝度比率を復元することを含むように最大解像度の画像を修正することと;、
(d)前記修正画像の一部分をぼかすことと;、
(e)修正画像、またはその組み合わせを、プリント、画像処理、または電気的格納、電気的伝送あるいは電気的表示をすることと;を含むことを特徴とするデジタル画像処理デバイス。 - 前記修正処理は、前記1つ以上の飽和したピクセルに輝度を付加することを含むことを特徴とする請求項11に記載のデジタル画像デバイス。
- 前記修正処理は、1つ以上の不飽和ピクセルから輝度を減じることをさらに含むことを特徴とする請求項12に記載のデジタル画像デバイス。
- 前記修正処理は、1つ以上の不飽和ピクセルから輝度を減じることをさらに含むことを特徴とする請求項11に記載のデジタル画像デバイス。
- 前記ぼかし処理は、
画像の前景に相当する前記修正画像の1つ以上の部分と、画像の背景に相当する部分とを決定することと、
前記背景部分をぼかすこととを含むことを特徴とする請求項11に記載のデジタル画像デバイス。 - 前記修正画像のぼかされた部分を再拡大縮小することをさらに備える請求項11に記載のデジタル画像デバイス。
- プリント、画像処理あるいは分析、または電気的格納、電気的伝送あるいは電気的表示、またはその組み合わせのためにデジタルカメラにより取得された画像のぼかしを生成するための方法であって、
前記方法が、
(a)第1の露出レベルで撮像された被写体の第1の画像を取得することと;
(b)みかけ上同じ被写体について第2の露出レベルで撮像され、少なくとも1つの領域が飽和輝度値を有する1つ以上のピクセルを含む第2の画像を取得することと;、
(c)前記飽和したピクセルの少なくとも1つについて、前記第1の画像から1つ以上の値を推定することと;
(d)不飽和値を有する前記第2の画像のピクセルと、前記1つ以上の推定された値を有するピクセルとを備える第3の画像を生成することと;
(e)前記第3の画像の少なくとも一部分をぼかすことと;
(f)前記第3の画像のぼかされた部分を再拡大縮小することと;を備えることを特徴とする方法。 - 画像の前景に相当する前記第3の画像の1つ以上の部分と、画像の背景に相当する部分とを決定することと、
前記背景部分をぼかすこととをさらに備えることを特徴とする請求項17に記載の方法。 - 前記第3の画像の前記ぼかし処理は、前記少なくとも1つの部分に少なくとも1つの畳み込みカーネルを適用することにより実行されることを特徴とする請求項17に記載の方法。
- 前記第3の画像が、前記飽和した輝度値を前記推定値に置き換えることにより修正された前記第2の画像を含むことを特徴とする請求項17に記載の方法。
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US77371406P | 2006-02-14 | 2006-02-14 | |
US60/773,714 | 2006-02-14 | ||
US11/673,560 | 2007-02-10 | ||
PCT/US2007/061956 WO2007095477A2 (en) | 2006-02-14 | 2007-02-10 | Image blurring |
US11/673,560 US7469071B2 (en) | 2006-02-14 | 2007-02-10 | Image blurring |
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JP2009527059A true JP2009527059A (ja) | 2009-07-23 |
JP4970468B2 JP4970468B2 (ja) | 2012-07-04 |
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US (2) | US7469071B2 (ja) |
EP (1) | EP1987436B1 (ja) |
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WO (1) | WO2007095477A2 (ja) |
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EP1987436A4 (en) | 2009-06-24 |
EP1987436B1 (en) | 2015-12-09 |
US20090040342A1 (en) | 2009-02-12 |
WO2007095477A3 (en) | 2008-07-24 |
JP4970468B2 (ja) | 2012-07-04 |
US7469071B2 (en) | 2008-12-23 |
WO2007095477A2 (en) | 2007-08-23 |
EP1987436A2 (en) | 2008-11-05 |
US20070189748A1 (en) | 2007-08-16 |
US7953287B2 (en) | 2011-05-31 |
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