WO2012056692A1 - Dispositif d'affichage d'image 3d et procédé d'affichage d'image 3d - Google Patents

Dispositif d'affichage d'image 3d et procédé d'affichage d'image 3d Download PDF

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Publication number
WO2012056692A1
WO2012056692A1 PCT/JP2011/005981 JP2011005981W WO2012056692A1 WO 2012056692 A1 WO2012056692 A1 WO 2012056692A1 JP 2011005981 W JP2011005981 W JP 2011005981W WO 2012056692 A1 WO2012056692 A1 WO 2012056692A1
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WO
WIPO (PCT)
Prior art keywords
image
display
radiation
stereoscopic image
displayed
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PCT/JP2011/005981
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English (en)
Japanese (ja)
Inventor
俊孝 阿賀野
孝夫 桑原
靖子 八尋
大田　恭義
玲 長谷川
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富士フイルム株式会社
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Publication of WO2012056692A1 publication Critical patent/WO2012056692A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/066—Adjustment of display parameters for control of contrast

Definitions

  • the present invention relates to a stereoscopic image display apparatus and a stereoscopic image display method for capturing a subject from two different shooting directions and displaying a stereoscopic image using two captured parallax images.
  • stereoscopic viewing can be performed using parallax by displaying a plurality of images in combination.
  • Such stereoscopic images that can be stereoscopically viewed are obtained by capturing a plurality of images by photographing the same subject from different positions using a plurality of cameras, and using the parallax of the subjects included in the plurality of images. Can be generated by synthesizing these images.
  • a plurality of images are superimposed by differentiating the colors of the plurality of images, such as red and blue, or overlapping the polarization directions of the plurality of images.
  • a visual image can be generated.
  • a stereoscopic image is displayed, and the stereoscopic image displayed using the stereoscopic glasses that separate the images such as red-blue glasses and polarized glasses is fused with the auto-focus function of the eyes, whereby the image is displayed.
  • Stereoscopic viewing is possible (anaglyph method, polarization filter method). It is also possible to display a stereoscopic image by using stereoscopic glasses and alternately displaying a parallax image for the left eye and a parallax image for the right eye (time division method).
  • Patent Document 1 and Patent Document 2 propose two-dimensional display of text boxes and characters in a stereoscopic image.
  • Patent Document 3 since there is a strong sense of incongruity at the boundary between the 3D stereoscopic image area and the 2D image area, a transparent area is provided to soften the boundary, or the boundary is gradually thinned. However, nothing is disclosed regarding 2D display of text boxes and contrast.
  • the present invention has been made in view of the above circumstances, and a stereoscopic image display device that can reduce the fatigue of an observer when observing a monitor on which a stereoscopic image that can be stereoscopically viewed by an observer is displayed. It is another object of the present invention to provide a stereoscopic image display method.
  • the stereoscopic image display device of the present invention includes a display unit that displays a stereoscopic image that can be stereoscopically viewed using a parallax image for each of the shooting directions acquired by shooting a subject from different shooting directions; Two-dimensional display box display control means for two-dimensionally displaying a two-dimensional display box on the display unit; Image processing means for gradually reducing the contrast as it approaches the two-dimensional display box in the stereoscopic image of a partial region adjacent to the two-dimensional display box displayed two-dimensionally by the two-dimensional display box display control means; It is characterized by having.
  • the “two-dimensional display box” refers to a rectangular character input or display area or layout frame on an operation screen of an application program or the like, and can also input or display symbols, pictograms, and the like. An image can also be displayed.
  • the two-dimensional display box is not limited to a rectangular shape, and may be an elliptical shape, a cloud shape, a polygonal shape, or the like.
  • “contrast” means a difference in density value or a brightness value between a bright part and a dark part represented by a density value or a brightness value.
  • the luminance value is a value indicating the degree of screen brightness customarily used in the display
  • the density value is a value indicating the degree of image brightness customarily used in the film.
  • the image processing means reduces the contrast so that the contrast of a partial region of the stereoscopic image in contact with the two-dimensional display box becomes zero. Also good.
  • the parallax image is a radiation image detected by a radiation image detector by irradiating a subject with radiation, and the stereoscopic image is displayed on the display unit based on the radiation image. It is preferable that the medical image is displayed on the screen.
  • the stereoscopic image display method of the present invention displays a stereoscopically viewable stereoscopic image on the display unit using a parallax image for each of the photographing directions acquired by photographing subjects from different photographing directions, and two-dimensionally.
  • a display box is displayed two-dimensionally on the display unit, In the stereoscopic image of a partial area adjacent to the two-dimensional display box displayed two-dimensionally, the contrast is gradually decreased as the two-dimensional display box is approached.
  • the contrast can be reduced so that the contrast of a partial region of the stereoscopic image in contact with the two-dimensional display box becomes zero.
  • the parallax image is a radiographic image detected by a radiographic image detector by irradiating a subject with radiation, It is preferable to display a medical image which is a stereoscopic image based on the radiation image on the display unit.
  • a stereoscopic image that can be stereoscopically viewed using a parallax image for each photographing direction acquired by photographing subjects from different photographing directions is displayed.
  • the contrast gradually decreases as the two-dimensional display box is approached. Since the contrast is reduced at the boundary portion between the three-dimensional display region and the two-dimensional display region, the step between the three-dimensional display region and the two-dimensional display region at the boundary portion can be reduced.
  • the boundary portion between the three-dimensional display region and the two-dimensional display region disappears, so the three-dimensional display region Therefore, it is possible to reduce fatigue when the observer observes the display unit without switching from the display area to the two-dimensional display area.
  • FIG. 1 is a schematic configuration diagram of a breast image photographing display system using an embodiment of a stereoscopic image display device of the present invention.
  • the figure which looked at the arm part of the mammography display system shown in FIG. 1 from the right direction of FIG. 1 is a block diagram showing a schematic configuration inside a computer of the breast image capturing and displaying system shown in FIG.
  • the figure which shows an example of the display of the breast and the text box in the radiographic image for the right eye and the radiographic image for the left eye Explanatory drawing explaining the image processing of one Embodiment of this invention
  • FIG. 1 is a diagram showing a schematic configuration of the entire breast image photographing display system of the present embodiment.
  • a breast image radiographing display system 1 includes a mammography apparatus 10, a computer 2 connected to the mammography apparatus 10, a monitor 3 connected to the computer 2, and an input unit. 4 is provided.
  • the mammography apparatus 10 includes a base 11, a rotary shaft 12 that can move in the vertical direction (Z direction) with respect to the base 11, and can rotate.
  • the arm part 13 connected with the base 11 is provided.
  • FIG. 2 shows the arm 13 viewed from the right direction in FIG.
  • the arm section 13 has an alphabet C shape, and a radiation table 16 is attached to one end of the arm section 13 so as to face the imaging table 14 at the other end.
  • the rotation and vertical movement of the arm unit 13 are controlled by an arm controller 31 incorporated in the base 11.
  • a radiation image detector 15 such as a flat panel detector, and a detector controller 33 for controlling reading of a charge signal from the radiation image detector 15 are provided.
  • a charge amplifier that converts the charge signal read from the radiation image detector 15 into a voltage signal
  • a correlated double sampling circuit that samples the voltage signal output from the charge amplifier
  • a circuit board provided with an AD conversion unit for converting a voltage signal into a digital signal is also installed.
  • the photographing table 14 is configured to be rotatable with respect to the arm unit 13, and even when the arm unit 13 rotates with respect to the base 11, the direction of the photographing table 14 is fixed to the base 11. can do.
  • the radiation image detector 15 can repeatedly perform recording and reading of a radiation image, and may use a so-called direct type radiation image detector that directly receives radiation and generates charges. Alternatively, a so-called indirect radiation image detector that converts radiation once into visible light and converts the visible light into a charge signal may be used.
  • a radiation image signal readout method a radiation image signal is read out by turning on / off a TFT (thin film transistor) switch, or by irradiating reading light. It is desirable to use a so-called optical readout system from which a radiation image signal is read out, but the present invention is not limited to this, and other systems may be used.
  • a radiation source 17 and a radiation source controller 32 are accommodated in the radiation irradiation unit 16.
  • the radiation source controller 32 controls the timing of irradiating radiation from the radiation source 17 and the radiation generation conditions (tube current, time, tube voltage, etc.) in the radiation source 17.
  • a compression plate 18 disposed above the imaging table 14 to press and compress the breast, a support portion 20 that supports the compression plate 18, and a support portion 20 in the vertical direction ( A moving mechanism 19 for moving in the Z direction) is provided.
  • the position of the compression plate 18 and the compression pressure are controlled by the compression plate controller 34.
  • the computer 2 includes a central processing unit (CPU), a semiconductor memory, a storage device such as a hard disk and an SSD, and the like. With these hardware, a control unit 8a, a radiation image storage unit 8b, an image, and the like shown in FIG. A processing unit 8c and a display control unit 8d are configured.
  • FIG. 3 is a block diagram showing a schematic configuration inside the computer of the breast image radiographing display system shown in FIG. 1
  • FIG. 4 is a flowchart for explaining the operation of the breast image radiographing display system shown in FIG. 3
  • FIG. FIG. 6 is a diagram showing an example of display of a breast and a text box in a right-eye radiographic image and a left-eye radiographic image
  • FIG. 6 is an explanatory diagram for explaining image processing according to an embodiment of the present invention.
  • the control unit 8a outputs predetermined control signals to the various controllers 31 to 35 to control the entire system. A specific control method will be described in detail later.
  • the radiation image storage unit 8b stores in advance two radiation image signals detected by the radiation image detector 15 by photographing from two different photographing directions.
  • the image processing unit 8c performs image processing for changing the contrast in the two radiation images, and the image processing by the image processing unit 8c will be described in detail later.
  • the display control unit 8d includes a radiation image display control unit 51 and a text box display control unit 52.
  • the radiographic image display control unit 51 performs a predetermined process on the two radiographic image signals read from the radiographic image storage unit 8b, and then displays a normal radiographic stereo image of the breast M on the monitor 3. It is.
  • the text box display control unit 52 displays a text box for inputting characters two-dimensionally on the monitor 3, and as shown in FIG. 5, the right-eye radiographic image and the left-eye radiographic image are placed at the same position in each image.
  • the observer displays the text box on the monitor 3 two-dimensionally. Can be observed.
  • the input unit 4 accepts input of photographing conditions and observation conditions by the observer, input of operation instructions, and the like, and is configured by an input device such as a keyboard and a mouse, for example.
  • the monitor 3 is configured to be able to display a stereo image using two radiation image signals output from the computer 2 at the time of photographing a stereo image.
  • a stereo image for example, a radiographic image based on two radiographic image signals is displayed using two screens, and one of the radiographic images is observed by using a half mirror or a polarizing glass. It is possible to adopt a configuration in which a stereo image is displayed by being incident on the right eye of the observer and the other radiation image is incident on the left eye of the observer.
  • two radiographic images may be displayed in a superimposed manner while being shifted by a predetermined amount of parallax, and this may be configured to generate a stereo image by observing with a polarizing glass, or a parallax barrier method and a lenticular method
  • a stereo image may be generated by displaying two radiation images on a stereoscopically viewable 3D liquid crystal.
  • the patient's breast M is placed on the imaging table 14, and the breast M is compressed with a predetermined pressure by the compression plate 18 (S10).
  • the first radiographic image of the two radiographic images constituting the stereo image of the breast M is captured (S12).
  • the control unit 8 a reads a convergence angle ⁇ for photographing a preset stereo image, and outputs the read information on the convergence angle ⁇ to the arm controller 31.
  • ⁇ ⁇ 2 ° is stored in advance as information on the convergence angle ⁇ at this time.
  • the present invention is not limited to this, and an arbitrary convergence angle is set by the photographer in the input unit 4. It can be set.
  • the arm controller 31 receives the information on the convergence angle ⁇ output from the control unit 8a.
  • the arm controller 31 captures the image of the arm unit 13 based on the information on the convergence angle ⁇ as shown in FIG.
  • a control signal is output so as to rotate + ⁇ ° with respect to a direction perpendicular to the table 14. That is, in the present embodiment, a control signal is output so that the arm unit 13 is rotated + 2 ° with respect to a direction perpendicular to the imaging table 14.
  • the control unit 8a applies radiation to the radiation source controller 32 and the detector controller 33 and the radiation.
  • a control signal is output so as to read out the image signal.
  • radiation is emitted from the radiation source 17
  • a radiation image obtained by photographing the breast from the + 2 ° direction is detected by the radiation image detector 15, and a radiation image signal is read by the detector controller 33.
  • the radiographic image signal is stored in the radiographic image storage unit 8 b of the computer 2.
  • the second radiographic image of the two radiographic images constituting the stereo image of the breast M is taken (S13).
  • the arm controller 31 outputs a control signal so as to rotate the arm unit 13 by ⁇ ° with respect to a direction perpendicular to the imaging table 14 as shown in FIG. That is, in the present embodiment, a control signal is output so that the arm unit 13 is rotated by ⁇ 2 ° with respect to a direction perpendicular to the imaging table 14.
  • the control unit 8 a applies radiation to the radiation source controller 32 and the detector controller 33, and the radiation.
  • a control signal is output so as to read out the image signal.
  • radiation is emitted from the radiation source 17
  • a radiation image obtained by imaging the breast from the ⁇ 2 ° direction is detected by the radiation image detector 15, and a radiation image signal is read by the detector controller 33.
  • predetermined signal processing is performed, it is stored in the radiation image storage unit 8b of the computer 2.
  • the two radiation image signals stored in the radiation image storage unit 8b as described above are input to the text box display control unit 52, and the text box display control unit 52 performs the right-eye radiation as described above.
  • Text boxes BR and BL are generated for the image and the left-eye radiation image, respectively.
  • the image signals of the right-eye radiation image and the left-eye radiation image in which the text boxes BR and BL are generated are input to the image processing unit 8c, and image processing is performed in the image processing unit 8c (S14).
  • the image processing by the image processing unit 8c is performed in a partial region adjacent to the text boxes BR and BL in the right-eye and left-eye radio images, specifically, in the text boxes BR and BL.
  • the contrast gradually decreases with respect to the 10 mm surrounding areas AR and AL (hereinafter referred to as three-dimensional parallax image areas AR and AL) as the text boxes BR and BL are approached. To be.
  • the density value for each pixel is converted so that the contrast in the three-dimensional parallax image areas AR and AL decreases in the direction of the arrow in FIG.
  • D is a density value before conversion
  • D ′ is a density value after conversion
  • D0 is a target density value
  • D ′ (x, y) A (L) ⁇ D (x, y) + D0
  • D (x, y) ⁇ D0 D ′ (x, y) A (L) ⁇ D (x, y) + (1 ⁇ A (L)) ⁇ D0
  • D0 may be set as appropriate, such as density 0, maximum density, or background density of a text box.
  • a (L) can be represented by a graph shown in FIG. 7, for example.
  • the radiographic image display control unit 51 is an image signal of two radiographic images stored in the radiographic image storage unit 8b, and the text box BR and BL are generated by the text box display control unit 52.
  • a stereo image of a breast that can be stereoscopically viewed on the monitor 3 and a text box that can be viewed two-dimensionally on the monitor 3 by performing predetermined processing on the image signal of the radiographic image for the left eye and the left eye and outputting it to the monitor 3 Is displayed (S15).
  • the contrast becomes closer to the text box. Since the contrast is reduced at the boundary between the 3D display area and the 2D display area, the step between the 3D display area and the 2D display area at the boundary can be reduced. This can reduce the recognition of the stereoscopic effect when the observer observes the text box, that is, the two-dimensional display area and the stereoscopic image, that is, the three-dimensional display area. Can be reduced.
  • the area subjected to image processing by the image processing unit 8c is 10 mm around the text box.
  • the present invention is not limited to this, and the observer inputs an arbitrary value from the input unit 4. This can be set as appropriate.
  • the text box is displayed on the monitor 3 two-dimensionally by the text box display control unit 52.
  • the present invention is not limited to this.
  • a two-dimensional display box display control unit is provided.
  • the two-dimensional image may be displayed on the monitor 3 by the two-dimensional display box display control unit.
  • the text box BR in the right-eye radiographic image and the left-eye radiographic image, the text box BR as shown by an arrow in FIG. , The contrast may be gradually reduced so that the contrast of the three-dimensional parallax image areas AR and AL in contact with BL becomes zero.
  • the density value for each pixel is converted so that the contrast in the three-dimensional parallax image areas AR and AL decreases in the direction of the arrow in FIG.
  • a (L) is a function of a distance (L) from a text box
  • D is a pixel value before conversion
  • D ′ is a pixel value after conversion
  • D ′ (x, y) A (L) ⁇ D (x, y)
  • a (L) can be represented by a graph shown in FIG. 7, for example.
  • the boundary portion between the three-dimensional display area and the two-dimensional display area is As a result, there is no sudden switching from the three-dimensional display area to the two-dimensional display area, and fatigue when the observer observes the display unit can be reduced.
  • one embodiment of the stereoscopic image display device of the present invention is applied to a breast image capturing and displaying system.
  • the subject of the present invention is not limited to the breast, and for example, a chest or a head.
  • the present invention can also be applied to a radiographic imaging display system that captures images such as.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

La présente invention aborde le problème consistant à permettre la réduction de la fatigue qu'un spectateur ressent lorsqu'il regarde un moniteur sur lequel une image 3D qui peut être vue en 3D est affichée. A cette fin, selon la présente invention, une image 3D qui peut être vue en 3D est affichée sur une unité d'affichage par utilisation d'images de parallaxe par direction d'imagerie acquises par imagerie d'un sujet à partir de directions d'imagerie mutuellement différentes ; une fenêtre d'affichage 2D est affichée sur l'unité d'affichage en 2D ; et dans des régions partielles (AR, AL) de l'image 3D adjacentes à la fenêtre d'affichage 2D (BR, BL) affichée en 2D, le contraste est réglé de sorte que plus la fenêtre d'affichage 2D (BR, BL) soit proche, plus le contraste est bas.
PCT/JP2011/005981 2010-10-28 2011-10-26 Dispositif d'affichage d'image 3d et procédé d'affichage d'image 3d WO2012056692A1 (fr)

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US40780010P 2010-10-28 2010-10-28
US61/407,800 2010-10-28

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0973049A (ja) * 1995-06-29 1997-03-18 Canon Inc 画像表示方法及びそれを用いた画像表示装置
WO2006054518A1 (fr) * 2004-11-18 2006-05-26 Pioneer Corporation Dispositif d’affichage 3d
JP2010193409A (ja) * 2009-02-20 2010-09-02 Nikon Corp 画像提示システム、画像処理装置、プログラムおよび画像提示方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0973049A (ja) * 1995-06-29 1997-03-18 Canon Inc 画像表示方法及びそれを用いた画像表示装置
WO2006054518A1 (fr) * 2004-11-18 2006-05-26 Pioneer Corporation Dispositif d’affichage 3d
JP2010193409A (ja) * 2009-02-20 2010-09-02 Nikon Corp 画像提示システム、画像処理装置、プログラムおよび画像提示方法

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