JP2001298754A - Crosstalk cancellation method and system for stereoscopic image - Google Patents

Crosstalk cancellation method and system for stereoscopic image

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Publication number
JP2001298754A
JP2001298754A JP2000109312A JP2000109312A JP2001298754A JP 2001298754 A JP2001298754 A JP 2001298754A JP 2000109312 A JP2000109312 A JP 2000109312A JP 2000109312 A JP2000109312 A JP 2000109312A JP 2001298754 A JP2001298754 A JP 2001298754A
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Japan
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image
images
stereoscopic
pixel
left
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JP2000109312A
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Japanese (ja)
Inventor
Tomohiko Hattori
知彦 服部
Original Assignee
Tomohiko Hattori
Tokyo System Fukugo Gijutsu Kenkyusho:Kk
知彦 服部
株式会社東京システム複合技術研究所
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Priority to JP2000109312A priority Critical patent/JP2001298754A/en
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Abstract

PROBLEM TO BE SOLVED: To realize an image processing method or an image processing system with which a crosstalk caused in a stereoscopic vision by both eyes eliminated or reduced y applying gradation processing to images for left and right eyes and using images resulting from a weighted difference of the images for left and right eyes for respective stereoscopic images. SOLUTION: The image processing method or the image processing system employs a linear image conversion and weight difference processing sections that display images R', L' on a stereoscopic image display screen, which images are obtained by substituting images R, L to an expression R'=(R-aL)÷(1-a2) as a right eye image and an expression L'=(L-aR)÷(1-a2) as a left eye image, wherein R, L are images subjected to linear gradation conversion under the conditions of a<=R<=1 and a<=L<=1 and 'a' is the minimum luminance of the images R, L.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は両眼立体視の際のクロストークの減弱または消去させる画像処理方式および画像処理装置に関する。 The present invention relates to an image processing method and image processing apparatus for attenuating or erased crosstalk during binocular stereopsis.

【0002】 [0002]

【従来技術】従来、混在したステレオ像を各々の差分像を用いて純粋なステレオ像を取り出す試みを内視鏡に関する記述として特開平08ー240778、特開平09 BACKGROUND ART Conventionally, JP 08 over 240 778 attempts to retrieve the pure stereo image stereo image mixed with each difference image as description of an endoscope, JP 09
ー090241、特開平10ー048538、特開平1 Over 090,241, JP 10 over 048 538, JP-A-1
0ー216082に於いて本発明者が示したが、ここで示された方法では立体ディスプレイ上で生じる該混在を示すクロストークを消去させることは、該ディスプレイ上での負の輝度表示ができないため不可能であった。 0 The present inventors at the over 216,082 showed, wherein in the illustrated method thereby erasing the crosstalk showing the mix produced on the three-dimensional display, because it can not negative intensity displayed on the display It was impossible.

【0003】 [0003]

【発明が解決しようとする課題】本発明は上述の点に鑑み為されたものであり、両眼立体視の際のクロストーク減弱または消去させる画像処理方式および画像処理装置を提供するものである。 [0008] The present invention has been made in view of the above points, there is provided an image processing method and image processing apparatus for crosstalk attenuation or erased during binocular stereopsis .

【0004】 [0004]

【課題を解決するための手段】そこで、本発明は、第一に、クロストーク分の画像成分の差分を予め行えるように立体映像信号を線形階調変換し、かつ該重み付け差分を行うことにより、立体視の際のクロストークを消去または減じることを特徴とする立体画像表示用画像処理方式および画像処理装置とすることによる。 Therefore SUMMARY OF THE INVENTION The present invention is primarily a stereoscopic video signal to allow the difference between the image component of the crosstalk component in advance linearly gradation conversion, and by performing the weighting difference due to the fact that a stereoscopic image display image and said erase or reduce possible crosstalk processing method and image processing apparatus when stereoscopic. 第二に、立体映像信号の各視差画像の画素毎の輝度の表示を規格化表現して、0から1の範囲で示すと、該視差画像輝度の最暗輝度0を、0より大きく1より小さい係数の値に変更することにより該視差画像の輝度に関する階調を線形変換させ、かつ該線形変換後の各視差画像のうちの一対のステレオ画像の左右眼用画像の各画素輝度と、該左右眼用画像と反対の眼用画像の各画素輝度に該係数を乗じた輝度の差を各画素毎にとり、1から該係数の2乗を差し引いた値を各画素毎にさらに乗じた画素輝度群により再構成された画像を左右眼用ステレオ像として用いる際に、該係数を最適化し定めることにより立体視の際に生じるクロストークを減じるまたは消去させることを特徴とする請求項1記載の立体画像表示用画像処理方式および画像 Secondly, normalized representation an indication of the brightness of each pixel of each parallax image of the stereoscopic video signal, indicating the range of 0 to 1, the darkest luminance 0 of parallax image brightness, from greater than 0 1 each pixel intensity of the left and right eye images of a pair of stereo images of the parallax luminance gradation is linearly converts the related image, and the parallax images after the linear conversion by changing the value of the coefficients less, the the difference between the luminance multiplied by the coefficient to each pixel intensity with the left and right eye images opposite eye image taken for each pixel, further pixel luminance by multiplying a value obtained by subtracting the square of the coefficient from 1 for each pixel when using the image reconstructed by the group as a stereo image for the right and left eyes, stereoscopic according to claim 1, wherein reducing the cross-talk or be erased occurring during stereoscopic by determining optimize the coefficient image display for image processing method and image 理装置とすることによる。 Due to the fact that the management apparatus.

【0005】 [0005]

【作用】本発明では、両眼立体視の際のクロストークを、左右眼用画像の階調処理し、さらに左右眼用画像同士の重み付け差分をとった画像を各々のステレオ像とすることにより消去または減じることができる。 According to the present invention, the cross-talk at the time of binocular stereopsis, and gradation processing of the left and right eye images by further images taken weighted difference between the images for the right and left eyes with each of the stereo image it can be erased or reduced.

【0006】 [0006]

【実施例】以下引き続き、本発明の請求項1および2に基づく立体画像におけるクロストーク消去方式および装置の要旨をさらに明確にするため、図面を利用して実施例を説明する。 EXAMPLES The following continue, in order to further clarify the subject matter of the crosstalk canceller method and apparatus in the stereoscopic image based on claims 1 and 2 of the present invention, an embodiment using the drawings. 図1は本実施例における立体画像におけるクロストーク消去方式の階調変換を示す説明図であり、図2は前記該階調変換を含むクロストーク消去方式のブロック図であり、実際にステレオ像観察者に観察される画素群は、各画素ごとにR+aLに示される右眼画像Rに左眼画像Lが混じったクロストーク状態とL+a Figure 1 is an explanatory diagram showing a gradation conversion crosstalk erase method in the three-dimensional image in this embodiment, FIG. 2 is a block diagram of a crosstalk canceller system comprising the grayscale conversion, actually stereoscopic image observation group of pixels observed person, cross-talk state and L + a left eye image L is mixed in the right eye image R shown in R + aL each pixel
Rに示される左眼画像Lに右眼画像Rが混じったクロストーク状態である。 On the left-eye image L shown in R is crosstalk closed mixed the right eye image R. ただし、0<a<1とする。 However, and 0 <a <1. ここでこのクロストークを無くすためには、R'+aL'= Here in order to eliminate this crosstalk, R '+ aL' =
R、L'+aR'=Lというように、立体映像表示画面に特別なR'、L'を入力することによりRやLを作りたい。 R, L '+ aR' = and so on L, want to make the R and L by special R ', L' be the input to a three-dimensional image display screen. 理論的には右眼用画像としてR'=(R−aL) R theoretically as the right-eye image '= (R-aL)
÷(1−a 2 )、左眼用画像としてL'=(L−aR)÷ ÷ (1-a 2), L as the left-eye image '= (L-aR) ÷
(1−a 2 )を立体画像表示面に表示できればよいが、R (1-a 2) Although it suffices displayed on the stereoscopic image display plane, R-
=0、画像としては真っ黒でL≠0のときR'<0であり、このような負の輝度は物理的に表示不可能である。 = 0, the image is R '<0 when the pitch black at L ≠ 0, such negative intensity is physically impossible display.
よって、図1に示す如く、RやLの最低輝度をaとしたa Therefore, as shown in FIG. 1, and the minimum luminance of the R and L as a a
≦R≦1、a≦L≦1である線形階調変換を行ったR、 ≦ R ≦ 1, a ≦ L ≦ 1 R a linear gradation conversion went is,
Lを用いて図2に示す前記アルゴリズムにそって、R' Along the algorithm shown in FIG. 2 by using the L, R '
およびL'を求めると、0≦R'≦1、0≦L'≦1であり表示可能である。 And 'the seek, 0 ≦ R' L can display a ≦ 1,0 ≦ L '≦ 1. よって該R'、該L'を立体画像表示面に各々右眼用画像および左眼用画像として表示すればクロストークは消滅する。 Thus the R ', wherein L' crosstalk by displaying as each right-eye and left-eye images to the stereoscopic image display surface disappears. 本実施例では立体映像の観察の際のクロストーク消去方式を示したが、本方式は画像変換装置として用いても良い。 Showed crosstalk canceller system during observation of a stereoscopic image in the present embodiment, this method may be used as the image conversion apparatus. なお同様の効果を奏するアルゴリズムであればどの様に構成されたアルゴリズムを用いて良いことは言うまでもない。 Incidentally it goes without saying that with How You configured algorithm if the algorithm to obtain the same effect.

【0007】 [0007]

【発明の効果】本発明は、上述の如く構成されているので、両眼立体視の際のクロストークを、左右眼用画像の階調処理し、さらに左右眼用画像同士の重み付け差分をとった画像を各々のステレオ像とすることにより消去または減じることができる独特の効果を奏するものである。 According to the present invention, which is configured as described above, the cross-talk at the time of binocular stereopsis, and gradation processing of the left and right eye images, further taking the weighted difference between the images for the right and left eyes it is intended to achieve the unique advantage of being able to erase or reduced by the image with each of the stereo images were.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】請求項1および2に基づく発明の立体画像におけるクロストーク消去方式の階調変換を示す説明図である。 FIG. 1 is an explanatory diagram showing a gradation conversion crosstalk erase method in the three-dimensional image of the invention based on claim 1 and 2.

【図2】請求項1および2に基づく発明の立体画像におけるクロストーク消去方式のアルゴリズム示すブロック図である。 2 is a block diagram showing the algorithm of the crosstalk canceller system in the stereoscopic image of the invention based on claim 1 and 2.

【符号の説明】 DESCRIPTION OF SYMBOLS

A 階調変換前の規格化表現された輝度信号 B 階調変換後の規格化表現された輝度信号 a クロストークを示すパラメータ C aを切片とした線形階調変換 D R'=(R−aL)÷(1−a 2 )である重み付け差分処理 E L'=(L−aR)÷(1−a 2 )である重み付け差分処理 R 処理前の右眼用画像信号 L 処理前の左眼用画像信号 R' 処理後の右眼用画像信号 L' 処理後の左眼用画像信号 Linear tone conversion as a parameter C a sections showing a normalized representation luminance signal a crosstalk after the luminance signal B gradation conversion normalized representation before A gradation converting D R '= (R-aL ) ÷ (1-a 2) a is the weighted difference processing E L '= (L-aR ) ÷ (1-a 2) a is the weighted difference processing R preprocessing of the right image signal L pre-processing of the left-eye-eye image signal R 'processed right-eye image signal L' left-eye image signal after processing

Claims (2)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 クロストーク分の画像成分の差分を予め行えるように立体映像信号を線形階調変換し、かつ該重み付け差分を行うことにより、立体視の際のクロストークを消去または減じることを特徴とする立体画像表示用画像処理方式および画像処理装置。 1. A stereoscopic video signal to allow the difference between the image component of the crosstalk component in advance linearly gradation conversion, and by performing the weighting difference, the reducing erase or cross-talk during stereoscopic image display stereoscopic images, wherein the processing method and image processing apparatus.
  2. 【請求項2】 立体映像信号の各視差画像の画素毎の輝度の表示を規格化表現して、0から1の範囲で示すと、 2. A normalized representation an indication of the brightness of each pixel of each parallax image of the stereoscopic video signal, indicating the range of 0 to 1,
    該視差画像輝度の最暗輝度0を、0より大きく1より小さい係数の値に変更することにより該視差画像の輝度に関する階調を線形変換させ、かつ該線形変換後の各視差画像のうちの一対のステレオ画像の左右眼用画像の各画素輝度と、該左右眼用画像と反対の眼用画像の各画素輝度に該係数を乗じた輝度の差を各画素毎にとり、1から該係数の2乗を差し引いた値を各画素毎にさらに乗じた画素輝度群により再構成された画像を左右眼用ステレオ像として用いる際に、該係数を最適化し定めることにより立体視の際に生じるクロストークを減じるまたは消去させることを特徴とする前記請求項1記載の立体画像表示用画像処理方式および画像処理装置。 The darkest luminance 0 of parallax image brightness, the gradation relating to the luminance of the parallax image by changing the value of the increase coefficient smaller than 1 from 0 to linear conversion, and out of the parallax images after the linear transformation each pixel intensity of the left and right eye images of a pair of stereo images, taken for each pixel the difference between the luminance multiplied by the coefficient to each pixel brightness of the opposite eye image and left and right-eye images, one to the number of engagement crosstalk caused the value obtained by subtracting the square when using the reconstructed image as a stereo image for the right and left eyes by further multiplying the pixel luminance group for each pixel, during stereoscopic by determining optimize the coefficient the reduced or claim 1 stereoscopic image display image processing method and image processing apparatus, wherein the to erase.
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Cited By (11)

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JP2009251098A (en) * 2008-04-02 2009-10-29 Mitsubishi Electric Corp Image display
JP2010200213A (en) * 2009-02-27 2010-09-09 Sony Corp Image processing apparatus, image processing method, program, and three-dimensional image display apparatus
CN101895778A (en) * 2010-07-15 2010-11-24 华映视讯(吴江)有限公司;中华映管股份有限公司 Method and system for reducing stereo image ghost
CN102045579A (en) * 2009-10-15 2011-05-04 索尼公司 Image signal processing device and method, image display device, method and system
US8106940B2 (en) 2006-09-29 2012-01-31 Kabushiki Kaisha Toshiba Stereoscopic image display apparatus and stereoscopic image producing method
CN102420997A (en) * 2010-09-28 2012-04-18 承景科技股份有限公司 Image processing method
CN102790899A (en) * 2011-05-14 2012-11-21 杜比实验室特许公司 Crosstalk cancellation in 3d displays
US8339333B2 (en) 2008-01-02 2012-12-25 3M Innovative Properties Company Methods of reducing perceived image crosstalk in a multiview display
US8400492B2 (en) 2005-05-26 2013-03-19 Reald Inc. Projection of stereoscopic images using linearly polarized light
EP2693759A2 (en) 2012-07-31 2014-02-05 NLT Technologies, Ltd. Stereoscopic image display device, image processing device, and stereoscopic image processing method
US8681148B2 (en) 2010-01-12 2014-03-25 Mitsubishi Electric Corporation Method for correcting stereoscopic image, stereoscopic display device, and stereoscopic image generating device

Cited By (15)

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US9288465B2 (en) 2005-05-26 2016-03-15 ReaID Inc. Ghost-compensation for improved stereoscopic images
US8400492B2 (en) 2005-05-26 2013-03-19 Reald Inc. Projection of stereoscopic images using linearly polarized light
US8106940B2 (en) 2006-09-29 2012-01-31 Kabushiki Kaisha Toshiba Stereoscopic image display apparatus and stereoscopic image producing method
US8339333B2 (en) 2008-01-02 2012-12-25 3M Innovative Properties Company Methods of reducing perceived image crosstalk in a multiview display
JP2009251098A (en) * 2008-04-02 2009-10-29 Mitsubishi Electric Corp Image display
JP2010200213A (en) * 2009-02-27 2010-09-09 Sony Corp Image processing apparatus, image processing method, program, and three-dimensional image display apparatus
CN102045579A (en) * 2009-10-15 2011-05-04 索尼公司 Image signal processing device and method, image display device, method and system
US8681148B2 (en) 2010-01-12 2014-03-25 Mitsubishi Electric Corporation Method for correcting stereoscopic image, stereoscopic display device, and stereoscopic image generating device
CN101895778A (en) * 2010-07-15 2010-11-24 华映视讯(吴江)有限公司;中华映管股份有限公司 Method and system for reducing stereo image ghost
CN102420997A (en) * 2010-09-28 2012-04-18 承景科技股份有限公司 Image processing method
CN102790899A (en) * 2011-05-14 2012-11-21 杜比实验室特许公司 Crosstalk cancellation in 3d displays
US9148645B2 (en) 2011-05-14 2015-09-29 Dolby Laboratories Licensing Corporation Crosstalk cancellation in 3D displays
US9769451B2 (en) 2011-05-14 2017-09-19 Dolby Laboratories Licensing Corporation Crosstalk cancellation in 3D displays
EP2693759A2 (en) 2012-07-31 2014-02-05 NLT Technologies, Ltd. Stereoscopic image display device, image processing device, and stereoscopic image processing method
US9280951B2 (en) 2012-07-31 2016-03-08 Nlt Technologies, Ltd. Stereoscopic image display device, image processing device, and stereoscopic image processing method

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