WO2012077319A1 - Stereovision image display method and apparatus therefor - Google Patents

Stereovision image display method and apparatus therefor Download PDF

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Publication number
WO2012077319A1
WO2012077319A1 PCT/JP2011/006765 JP2011006765W WO2012077319A1 WO 2012077319 A1 WO2012077319 A1 WO 2012077319A1 JP 2011006765 W JP2011006765 W JP 2011006765W WO 2012077319 A1 WO2012077319 A1 WO 2012077319A1
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image
eye
eye image
processed
display
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PCT/JP2011/006765
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French (fr)
Japanese (ja)
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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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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/346—Image reproducers using prisms or semi-transparent mirrors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/24—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type involving temporal multiplexing, e.g. using sequentially activated left and right shutters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/398—Synchronisation thereof; Control thereof

Definitions

  • the present invention relates to a stereoscopic image display method and apparatus for displaying a stereoscopic image captured by irradiating a subject with radiation from two different imaging directions.
  • stereoscopic viewing can be performed using parallax by displaying a plurality of images in combination.
  • a stereoscopically viewable image hereinafter referred to as a stereoscopic image or a stereo image
  • a stereoscopic image or a stereo image is displayed based on a plurality of images with parallax obtained by photographing the same subject from different directions.
  • Such generation of stereoscopic images is used not only in the fields of digital cameras and televisions, but also in the field of radiographic imaging.
  • a subject is irradiated with radiation from different imaging directions, the radiation transmitted through the subject is detected by a radiation detector, and a plurality of radiation images having parallax are obtained, and these radiation images are used.
  • displaying a stereoscopic image is performed.
  • the stereoscopic view of the radiation image is performed by displaying the above-described plurality of radiation images on a display device such as a three-dimensional monitor for performing the stereoscopic view.
  • a display device such as a three-dimensional monitor for performing the stereoscopic view.
  • a display device for example, in Patent Document 1 and Patent Document 2, a right-eye image and a left-eye image are displayed on two monitors, respectively, and an observer views these left and right images with both eyes.
  • various image processing is performed on the image for the right eye and the image for the left eye displayed for performing the stereoscopic observation as described above.
  • various image processing such as frequency processing, gradation processing, and density correction processing is performed in order to obtain an image suitable for a diagnostic image. It takes a relatively long processing time.
  • Patent Document 1 and Patent Document 2 no consideration is given to the existence of a display start time lag between the left-eye image and the right-eye image depending on the processing time of the image processing as described above.
  • the present invention has been made in view of the above circumstances, and in a stereoscopic image display method and apparatus for displaying a stereoscopic image by displaying a left-eye image and a right-eye image, stereoscopic viewing is facilitated.
  • An object of the present invention is to provide a stereoscopic image display method and apparatus that can continue stereoscopic viewing stably.
  • the stereoscopic image display apparatus of the present invention acquires an image for a right eye and an image for a left eye obtained by photographing a subject from different directions, and performs image processing on the image for the right eye and the image for the left eye, and image processing
  • a stereoscopic image display apparatus comprising a display unit that displays a processed right-eye image and a processed left-eye image that have been subjected to image processing in the unit and displays a stereoscopic image of a still image
  • the right-eye image A display control unit that controls the display unit to display the processed right-eye image and the processed left-eye image at the same display start timing after the time point when both the image processing for and the image processing for the left-eye image are completed. It is characterized by having.
  • the display control unit is configured to process the right eye that has been processed from the time when the image processing with the later end timing out of the image processing for the right-eye image and the image processing for the left-eye image ends.
  • the image for processing and the image for the processed left eye can be displayed.
  • an image processing change receiving unit that receives a change in image processing in the image processing unit is provided, and the display control unit has completed both the image processing after the change for the right-eye image and the image processing after the change for the left-eye image. After the time point, the display unit can be controlled to display the processed right-eye image and the processed left-eye image at the same display start timing.
  • the display control unit is configured to process the processed right-eye image and the processed image from the time when the later image processing of the image processing after change for the right-eye image and the image processing after change for the left-eye image ends. It can be displayed as an image for the left eye.
  • a right-eye image and a left-eye image obtained by photographing a subject from different directions are obtained, image processing is performed on the right-eye image and the left-eye image, and the image processing is performed.
  • image processing is performed on the right-eye image and the left-eye image
  • the image processing is performed.
  • a stereoscopic image display method of displaying a processed right-eye image and a processed left-eye image at the same time to display a stereoscopic image of a still image both image processing for the right-eye image and image processing for the left-eye image are performed.
  • the processed right-eye image and the processed left-eye image are displayed at the same display start timing after the end time.
  • “from the time when the image processing with the later end timing is completed” does not mean that it is strictly from the time when the image processing with the later end is completed, but the image processing with the later end is substantially completed. For example, in the case of performing signal processing for display after the later image processing is completed, it is also included from the time when the signal processing is completed.
  • a right-eye image and a left-eye image obtained by photographing a subject from different directions are acquired, and image processing is performed on the right-eye image and the left-eye image.
  • image processing for the right-eye image and image processing for the left-eye image Since both the processed image for the right eye and the processed image for the left eye are displayed at the same display start timing after the time of both ends, the observer can perform the right eye image and the left eye image at the same timing. And the left-eye image can be observed, and stereoscopic viewing can be easily performed.
  • the observer uses the right-eye and the left-eye that have been subjected to the image processing after the change at the same timing. Since the image and the left-eye image can be observed, stereoscopic vision can be continued stably.
  • 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 from the right direction in the mammography imaging display system shown in FIG. 1 is a block diagram showing a schematic configuration inside a computer of the breast image capturing and displaying system shown in FIG.
  • 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 breast image capturing apparatus 10 captures a stereo image by irradiating the breast M with radiation from mutually different capturing directions, acquires a stereo image of the breast M, and outputs the stereo image to the computer 2.
  • the mammography apparatus 10 includes a base 11, a rotary shaft 12 that is movable in the vertical direction (Z direction) with respect to the base 11, and is rotatable.
  • An arm portion 13 connected to the base 11 by a rotating shaft 12 is provided.
  • FIG. 2 shows the arm 13 viewed from the right direction in FIG.
  • the arm portion 13 has an alphabet C shape, and a radiation source unit 16 is attached to one end of the arm portion 13 so as to face the imaging table 14 at the other end.
  • the movement of the arm unit 13 in the vertical direction is controlled by an arm controller 31 incorporated in the base 11.
  • a radiographic image detector 15 such as a flat panel detector and a detector controller 33 that controls reading of a charge signal from the radiographic image detector 15 are provided inside the imaging table 14.
  • 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 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 reading method a radiation image signal is read 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 source 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 that is arranged above the imaging table 14 and presses against the breast, a support unit 20 that supports the compression plate 18, and a support unit 20 in the vertical direction.
  • a moving mechanism 19 for moving 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) and a storage device such as a semiconductor memory, a hard disk, and an SSD, and the control unit 2a, the radiation image storage unit 2b, the image as shown in FIG. A processing unit 2c and a display control unit 2d are configured.
  • CPU central processing unit
  • storage device such as a semiconductor memory, a hard disk, and an SSD
  • the controller 2a 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 radiographic image storage unit 2b stores a right-eye image and a left-eye image that constitute a stereo image of the breast M captured by the breast image capturing apparatus 10.
  • the image processing unit 2c performs various image processing on the right-eye image and the left-eye image read from the radiation image storage unit 2b.
  • Examples of the image processing include frequency processing, gradation processing, dynamic range compression processing, PEM (Pattern Enhancement Processing for Mammography) processing, density correction processing, and the like.
  • the image processing unit 2c sequentially performs the above-described image processing on the right-eye image and the left-eye image in this order, and sequentially outputs the right-eye image after the image processing to the display control unit 2d.
  • the display control unit 2d performs predetermined signal processing on the image for the right eye and the image for the left eye that have been subjected to image processing in the image processing unit 2c, and then simultaneously displays these images on the monitor 3 to display the breast M.
  • the still image of the stereo image is displayed.
  • the processed right eye image and the processed left eye image output from the image processing unit 2c are sequentially input to the display control unit 2d of the present embodiment, but the display control unit 2d performs image processing. Until the processed left-eye image is input, the processed right-eye image is not displayed until the processed left-eye image is input. That is, when the processed left-eye image is input, that is, when the image processing for the left-eye image is completed. The processed right-eye image and the processed left-eye image are displayed on the monitor 3 at the same display start timing.
  • the image processing unit 2c performs image processing on the left eye image after performing image processing on the right eye image.
  • the image processing may be performed on the right-eye image after the image processing is performed on the image.
  • the display control unit 2d does not display the processed left-eye image until the processed right-eye image is input, which has been delayed, and the processed right-eye image is input.
  • the processed right-eye image and the processed left-eye image are displayed on the monitor 3 at the same display start timing at the time, that is, from the time when the image processing for the right-eye image is completed.
  • the monitor 3 is configured to display a stereo image using the processed right-eye image and the processed left-eye image. Specifically, as shown in FIG. 4, the monitor 3 of the present embodiment displays a processed right-eye image GR and a processed left-eye image GL so as to stereoscopically display breasts in these images. It is. As shown in FIG. 4, the monitor 3 is configured by combining an upper display unit 40 and a lower display unit 41 inclined forward, and a half mirror 42 is provided between the two display units 40 and 41. Is arranged.
  • the upper display unit 40 displays the processed right-eye image GR on the display screen 40a
  • the lower display unit 41 displays the processed left-eye image GL on the display screen 41b.
  • the processed right-eye image GR displayed by the upper display unit 40 is reflected by the half mirror 42 as shown by the solid line in the figure
  • the processed left-eye image displayed by the lower display unit 41 is It passes through the half mirror 42 as shown by the middle broken line.
  • the half mirror 42 is arranged at an angle such that the processed right-eye image GR and the processed left-eye image GL overlap each other during observation.
  • the monitor 3 is comprised so that the display light of the display parts 40 and 41 can be made into the mutually orthogonally polarized light.
  • the observer wears polarizing glasses having a right-eye polarizing lens that deflects so that the processed right-eye image GR is incident only on the right eye and a left-eye polarizing lens that polarizes the processed left-eye image GL so that it is incident only on the left eye. By wearing, these images can be observed with the left and right eyes, and the breast M can be viewed stereoscopically.
  • the monitor 3 is not limited to such a configuration.
  • the processed right-eye image and the processed left-eye image are displayed on a 3D liquid crystal that can be viewed stereoscopically, as in the parallax barrier method and the lenticular method. It is good also as a structure which produces
  • the input unit 4 is configured by a pointing device such as a keyboard and a mouse, for example, and accepts input of imaging conditions and an imaging start instruction in the mammography apparatus 10, and an image in the image processing unit 2c.
  • the process change is accepted. Specifically, addition or deletion of predetermined image processing, or change of image processing conditions (such as image processing parameters) for predetermined image processing is accepted.
  • the breast M is set on the imaging table 14, and the breast M is compressed with a predetermined pressure by the compression plate 18.
  • the control unit 2 a in response to a shooting start instruction input from the input unit 4, the control unit 2 a reads a shooting angle ⁇ for shooting a preset stereo image and uses the read information on the shooting angle ⁇ as the arm controller 31. Output to.
  • the imaging angle ⁇ is an angle formed by a straight line perpendicular to the detection surface of the radiation image detector 15 and the optical axis of the radiation emitted from the radiation source 17, as shown in FIG. That means.
  • the present invention is not limited to this, and an arbitrary shooting angle can be set by the photographer in the input unit 4. .
  • the arm controller 31 receives information on the shooting angle ⁇ output from the control unit 2 a, and the arm controller 31 outputs a control signal corresponding to the shooting angle ⁇ to the arm unit 13.
  • the arm unit 13 rotates based on a control signal corresponding to the input shooting angle ⁇ , and as a result, the shooting angle of the arm unit 13 is set to 0 °.
  • the control unit 2a outputs a control signal to the radiation source controller 32 and the detector controller 33 so as to perform radiation irradiation and readout of the radiation image signal.
  • this control signal radiation is emitted from the radiation source 17, a radiation image obtained by photographing the breast from the 0 ° direction is detected by the radiation image detector 15, and the radiation image signal is read by the detector controller 33, so that the right eye It is stored in the radiation image storage unit 2b of the computer 2 as a radiation image signal representing the image for use GR.
  • the radiation image signal output from the image detector 15 is stored in the radiation image storage unit 2b of the computer 2 as a radiation image signal representing the left-eye image GL.
  • a display start instruction by an observer is received in the input unit 4 (S10).
  • the control unit 2a reads out the radiographic image signals of the right eye image and the left eye image stored in the radiographic image storage unit 2b and outputs them to the image processing unit 2c.
  • the image processing unit 2c first performs image processing on the input radiographic image signal of the right-eye image, and outputs the processed radiographic image signal of the right-eye image to the display control unit 2d (S14).
  • the display control unit 2d does not display the processed right eye image yet at this time.
  • the image processing unit 2c performs image processing on the input radiation image signal of the left-eye image, and outputs the processed radiation image signal of the left-eye image to the display control unit 2d (S16).
  • the display control unit 2d then displays the processed right-eye image and the processed left-eye image at the same display start timing when the processed left-eye image is input, that is, from the time when the image processing on the left-eye image is completed. It is displayed on the monitor 3 (S18). At this time, as shown in FIG. 4, the display control unit 2d displays the left-eye image GL and the right-eye image GR in a state where the images of the breasts M have a mirror image relationship and the chest wall MW is horizontal. .
  • the input unit 4 receives an instruction to change the image processing (S20, YES).
  • the image processing unit 2c When the image processing unit 2c receives an instruction to change the image processing in the input unit 4, the image processing unit 2c first performs the post-change image processing on the radiographic image signal of the right-eye image, and then performs the radiographic image signal of the processed right-eye image. Is output to the display control unit 2d (S22). The display control unit 2d does not display the processed right eye image yet at this time.
  • the image processing unit 2c performs post-change image processing on the radiation image signal of the left-eye image, and outputs the processed radiation image signal of the left-eye image to the display control unit 2d (S24).
  • the display control unit 2d displays the same processed right-eye image and processed left-eye image at the time when the processed left-eye image is input, that is, from the time when the modified image processing for the left-eye image is completed. It is displayed on the monitor 3 at the start timing (S18).
  • the image processing for the right-eye image and the image processing for the left-eye image are sequentially performed.
  • the present invention is not limited thereto, and the image processing for the right-eye image and the image processing for the left-eye image are performed. May be performed in parallel.
  • the display control unit 2d causes the monitor 3 to display the processed right-eye image and the processed left-eye image at the same display start timing from the later of the later image processing.
  • the stereoscopic image display apparatus of the present invention is applied to the mammography imaging display system.
  • the subject is not limited to the breast, and is a so-called imaging for breasts other than the breast. You may make it apply to the radiographic imaging display system for general imaging.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

[Objective] To make, in a stereovision image display apparatus wherein a stereovision image is displayed by displaying a left-eye image and a right-eye image, achievement of stereovision easy, and to enable continuance of the stereovision with stability. [Solution] Provided is a stereovision image display apparatus equipped with: an image processing unit (2c) for obtaining a right-eye image and a left-eye image that are images of a subject captured from mutually different directions, and implementing image processing onto the right-eye image and the left-eye image; and a display unit (3) for displaying, simultaneously, a processed right-eye image and a processed left-eye image that are the results of the image-processing implemented by the image processing unit (2c), to display a stereovision image of a still image. The stereovision image display apparatus has installed therein a display control unit (2d) for controlling the display unit so that the processed right-eye image and the processed left-eye image are displayed at the same display-start timing, on and after both the image processing for the right-eye image and the image processing for the left-eye image have been completed.

Description

立体視画像表示方法および装置Stereoscopic image display method and apparatus
 
本発明は、互いに異なる２つの撮影方向からの被写体への放射線の照射によって撮影された立体視画像を表示する立体視画像表示方法および装置に関するものである。
The present invention relates to a stereoscopic image display method and apparatus for displaying a stereoscopic image captured by irradiating a subject with radiation from two different imaging directions.
 
従来、複数の画像を組み合わせて表示することにより、視差を利用して立体視できることが知られている。このような立体視できる画像（以下、立体視画像またはステレオ画像という）は、同一の被写体を異なる方向から撮影して取得された互いに視差のある複数の画像に基づいて表示される。
Conventionally, it is known that stereoscopic viewing can be performed using parallax by displaying a plurality of images in combination. Such a stereoscopically viewable image (hereinafter referred to as a stereoscopic image or a stereo image) is displayed based on a plurality of images with parallax obtained by photographing the same subject from different directions.
 
このような立体視画像の生成は、デジタルカメラやテレビ等の分野だけでなく、放射線画像撮影の分野においても利用されている。すなわち、被検体に対して異なる撮影方向から放射線を照射し、その被検体を透過した放射線を放射線検出器によりそれぞれ検出して互いに視差のある複数の放射線画像を取得し、これらの放射線画像を用いて立体視画像を表示することが行われている。このような立体視画像を用いることにより、奥行き感のある放射線画像を観察することができるため、診断をより行いやすくすることができる。
Such generation of stereoscopic images is used not only in the fields of digital cameras and televisions, but also in the field of radiographic imaging. In other words, a subject is irradiated with radiation from different imaging directions, the radiation transmitted through the subject is detected by a radiation detector, and a plurality of radiation images having parallax are obtained, and these radiation images are used. Thus, displaying a stereoscopic image is performed. By using such a stereoscopic image, it is possible to observe a radiographic image with a sense of depth, so that diagnosis can be performed more easily.
 
そして、放射線画像の立体視は、上述した複数の放射線画像を、立体視を行うための３次元モニタ等の表示装置に表示することにより行われる。このような表示装置としては、たとえば、特許文献１および特許文献２には、２つのモニタにそれぞれ右目用画像と左目用画像とを表示し、観察者がこれらの左右画像を両眼視することによって立体視を可能とするものが提案されている。
The stereoscopic view of the radiation image is performed by displaying the above-described plurality of radiation images on a display device such as a three-dimensional monitor for performing the stereoscopic view. As such a display device, for example, in Patent Document 1 and Patent Document 2, a right-eye image and a left-eye image are displayed on two monitors, respectively, and an observer views these left and right images with both eyes. Has been proposed that enables stereoscopic viewing.
 
特開平１０－５２０６号公報 特開昭６１－１６３７０号公報
Japanese Patent Laid-Open No. 10-5206 Japanese Patent Laid-Open No. 61-16370
 
ここで、上述したような立体観察を行うために表示される右目用画像と左目用画像とには、種々の画像処理が施される。たとえば放射線画像である場合には、診断画像に適する画像とするために周波数処理や階調処理や濃度補正処理などの種々の画像処理が施されるが、これらの画像処理は演算処理が多く、比較的処理時間がかかるものである。特に、近年、放射線画像の高解像度化が望まれており、放射線画像の画素数は益々増加する傾向にあるため、そのような放射線画像に対する画像処理の時間は長くなる傾向にある。
Here, various image processing is performed on the image for the right eye and the image for the left eye displayed for performing the stereoscopic observation as described above. For example, in the case of a radiographic image, various image processing such as frequency processing, gradation processing, and density correction processing is performed in order to obtain an image suitable for a diagnostic image. It takes a relatively long processing time. In particular, in recent years, it has been desired to increase the resolution of a radiographic image, and the number of pixels of the radiographic image tends to increase more and more, so the time for image processing for such a radiographic image tends to become longer.
 
したがって、このような演算処理の重たい画像処理を高解像度な放射線画像に施す場合、右目用画像に対して施される画像処理が終了するタイミングと左目用画像に対して施される画像処理が終了するタイミングとの間に無視できない程度の時間差が生じる場合がある。
Therefore, when such heavy calculation processing is performed on a high-resolution radiographic image, the timing at which the image processing performed on the right-eye image ends and the image processing performed on the left-eye image are completed. There may be a time difference that cannot be ignored from the timing of the operation.
 
このような場合、画像処理が早く終了した方の画像から順次表示するようにすると、観察者の一方の目によって観察される画像のみが表示され、他方の目によって観察される画像はブラックアウトしている状態となって立体視することができず、その後に他方の目によって観察される画像が表示された際にも、立体視を即座に成立することが困難となる。
In such a case, if images are displayed sequentially from the image processing that has been completed earlier, only the image observed by one eye of the observer is displayed, and the image observed by the other eye is blacked out. It is difficult to achieve stereoscopic viewing even when an image observed by the other eye is displayed after that, even when an image observed by the other eye is displayed.
 
また、たとえば、複数の立体視画像を順次切り替えて観察する際、所定の立体視画像を観察した後、次の立体視画像を表示する際にも、観察者の一方の目によって観察される画像のみが次の画像に切り替わっている状態ができるため、左右の目で観察する画像が異なるものとなってしまい立体視が崩れてしまう問題がある。
In addition, for example, when a plurality of stereoscopic images are sequentially switched and observed, an image that is observed by one eye of the observer when a predetermined stereoscopic image is displayed and then the next stereoscopic image is displayed. Since only the next image can be switched to the next image, the images observed with the left and right eyes are different, and there is a problem that stereoscopic vision is lost.
 
また、たとえば、立体視画像を構成する右目用画像と左目用画像とに施される画像処理を変更した場合も、観察者の一方の目によって観察される画像のみが変更後の画像処理の施された画像に切り替わっている状態ができるため、やはり左右の目で観察する画像が異なるものとなってしまい立体視が崩れてしまう問題がある。
In addition, for example, when the image processing applied to the right eye image and the left eye image constituting the stereoscopic image is changed, only the image observed by one eye of the observer is subjected to the image processing after the change. Therefore, there is a problem that stereoscopic images are lost because the images observed with the left and right eyes are different.
 
なお、特許文献１および特許文献２においては、上述したように画像処理の処理時間によって左目用画像と右目用画像との間に表示開始のタイムラグが存在することについては一切考慮されていない。
In Patent Document 1 and Patent Document 2, no consideration is given to the existence of a display start time lag between the left-eye image and the right-eye image depending on the processing time of the image processing as described above.
 
本発明は、上記事情に鑑みなされたものであり、左目用画像と右目用画像とを表示することによって立体視画像を表示する立体視画像表示方法および装置において、立体視を容易にするとともに、かつ安定して立体視を継続することができる立体視画像表示方法および装置を提供することを目的とするものである。
The present invention has been made in view of the above circumstances, and in a stereoscopic image display method and apparatus for displaying a stereoscopic image by displaying a left-eye image and a right-eye image, stereoscopic viewing is facilitated. An object of the present invention is to provide a stereoscopic image display method and apparatus that can continue stereoscopic viewing stably.
 
本発明の立体視画像表示装置は、互いに異なる方向から被写体を撮影した右目用画像および左目用画像を取得し、右目用画像および左目用画像に対して画像処理を施す画像処理部と、画像処理部において画像処理の施された処理済右目用画像と処理済左目用画像とを同時に表示して静止画の立体視画像を表示する表示部とを備えた立体視画像表示装置において、右目用画像に対する画像処理と左目用画像に対する画像処理との両方が終了した時点以降に、処理済右目用画像と処理済左目用画像とを同じ表示開始タイミングで表示するよう表示部を制御する表示制御部を備えたことを特徴とする。
The stereoscopic image display apparatus of the present invention acquires an image for a right eye and an image for a left eye obtained by photographing a subject from different directions, and performs image processing on the image for the right eye and the image for the left eye, and image processing In a stereoscopic image display apparatus comprising a display unit that displays a processed right-eye image and a processed left-eye image that have been subjected to image processing in the unit and displays a stereoscopic image of a still image, the right-eye image A display control unit that controls the display unit to display the processed right-eye image and the processed left-eye image at the same display start timing after the time point when both the image processing for and the image processing for the left-eye image are completed. It is characterized by having.
 
また、本発明の立体視画像表示装置においては、表示制御部を、右目用画像に対する画像処理および左目用画像に対する画像処理のうちの終了タイミングが遅い方の画像処理が終了した時点から処理済右目用画像と処理済左目用画像と表示するものとすることができる。
In the stereoscopic image display apparatus of the present invention, the display control unit is configured to process the right eye that has been processed from the time when the image processing with the later end timing out of the image processing for the right-eye image and the image processing for the left-eye image ends. The image for processing and the image for the processed left eye can be displayed.
 
また、画像処理部における画像処理の変更を受け付ける画像処理変更受付部を設け、表示制御部を、右目用画像に対する変更後の画像処理と左目用画像に対する変更後の画像処理との両方が終了した時点以降に、処理済右目用画像と処理済左目用画像とを同じ表示開始タイミングで表示するよう表示部を制御するものとすることができる。
In addition, an image processing change receiving unit that receives a change in image processing in the image processing unit is provided, and the display control unit has completed both the image processing after the change for the right-eye image and the image processing after the change for the left-eye image. After the time point, the display unit can be controlled to display the processed right-eye image and the processed left-eye image at the same display start timing.
 
また、表示制御部を、右目用画像に対する変更後の画像処理および左目用画像に対する変更後の画像処理のうちの終了タイミングが遅い方の画像処理が終了した時点から処理済右目用画像と処理済左目用画像と表示するものとすることができる。
In addition, the display control unit is configured to process the processed right-eye image and the processed image from the time when the later image processing of the image processing after change for the right-eye image and the image processing after change for the left-eye image ends. It can be displayed as an image for the left eye.
 
本発明の立体視画像表示方法は、互いに異なる方向から被写体を撮影した右目用画像および左目用画像を取得して右目用画像および左目用画像に対して画像処理を施し、画像処理の施された処理済右目用画像と処理済左目用画像とを同時に表示して静止画の立体視画像を表示する立体視画像表示方法において、右目用画像に対する画像処理と左目用画像に対する画像処理との両方が終了した時点以降に、処理済右目用画像と処理済左目用画像とを同じ表示開始タイミングで表示することを特徴とする。
According to the stereoscopic image display method of the present invention, a right-eye image and a left-eye image obtained by photographing a subject from different directions are obtained, image processing is performed on the right-eye image and the left-eye image, and the image processing is performed. In a stereoscopic image display method of displaying a processed right-eye image and a processed left-eye image at the same time to display a stereoscopic image of a still image, both image processing for the right-eye image and image processing for the left-eye image are performed. The processed right-eye image and the processed left-eye image are displayed at the same display start timing after the end time.
 
ここで、上記「終了タイミングが遅い方の画像処理が終了した時点から」とは、厳密に遅い方の画像処理が終了した時点からのみと意味ではなく、実質的に遅い方の画像処理が終了した時点からという意味も含み、たとえば、遅い方の画像処理が終了した後、表示のための信号処理などを行う場合にはその信号処理が終了した時点からも含むものとする。
Here, “from the time when the image processing with the later end timing is completed” does not mean that it is strictly from the time when the image processing with the later end is completed, but the image processing with the later end is substantially completed. For example, in the case of performing signal processing for display after the later image processing is completed, it is also included from the time when the signal processing is completed.
 
本発明の立体視画像表示方法および装置によれば、互いに異なる方向から被写体を撮影した右目用画像および左目用画像を取得して右目用画像および左目用画像に対して画像処理を施し、画像処理の施された処理済右目用画像と処理済左目用画像とを同時に表示して静止画の立体視画像を表示する立体視画像表示方法において、右目用画像に対する画像処理と左目用画像に対する画像処理との両方が終了した時点以降に、処理済右目用画像と処理済左目用画像とを同じ表示開始タイミングで表示するようにしたので、観察者は、右目と左目とで同じタイミングで右目用画像と左目用画像とを観察することができ、立体視を容易に行うことができる。
According to the stereoscopic image display method and apparatus of the present invention, a right-eye image and a left-eye image obtained by photographing a subject from different directions are acquired, and image processing is performed on the right-eye image and the left-eye image. In the stereoscopic image display method for displaying the processed right-eye image and the processed left-eye image that have been subjected to display and displaying a stereoscopic image of a still image, image processing for the right-eye image and image processing for the left-eye image Since both the processed image for the right eye and the processed image for the left eye are displayed at the same display start timing after the time of both ends, the observer can perform the right eye image and the left eye image at the same timing. And the left-eye image can be observed, and stereoscopic viewing can be easily performed.
 
また、右目用画像と左目用画像との対する画像処理の変更を受け付けた際、右目用画像に対する変更後の画像処理と左目用画像に対する変更後の画像処理との両方が終了した時点以降に、処理済右目用画像と処理済左目用画像とを同じ表示開始タイミングで表示するようにした場合には、観察者は、右目と左目とで同じタイミングで変更後の画像処理の施された右目用画像と左目用画像とを観察することができるので、立体視を安定して継続することができる。
Further, when the image processing change for the right eye image and the left eye image is accepted, after both the image processing after the change for the right eye image and the image processing after the change for the left eye image are completed, When the processed right-eye image and the processed left-eye image are displayed at the same display start timing, the observer uses the right-eye and the left-eye that have been subjected to the image processing after the change at the same timing. Since the image and the left-eye image can be observed, stereoscopic vision can be continued stably.
 
本発明の立体視画像表示装置の一実施形態を用いた乳房画像撮影表示システムの概略構成図 図１に示す乳房画像撮影表示システムにおいてアーム部を右方向から見た図 図１に示す乳房画像撮影表示システムのコンピュータ内部の概略構成を示すブロック図 図１に示す乳房画像撮影表示システムのモニタの構成を示す図 本発明の立体視画像表示装置の一実施形態を用いた乳房画像撮影表示システムの作用を説明するためのフローチャート
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 from the right direction in the mammography imaging display system shown in 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 the structure of the monitor of the breast image radiographing display system shown in FIG. The flowchart for demonstrating the effect | action of the breast image radiographing display system using one Embodiment of the stereoscopic vision image display apparatus of this invention.
 
以下、図面を参照して本発明の立体視画像表示装置の一実施形態を用いた乳房画像撮影表示システムについて説明する。図１は、本実施形態の乳房画像撮影表示システム全体の概略構成を示す図である。
Hereinafter, a mammography display system using an embodiment of a stereoscopic image display apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of the entire breast image photographing display system of the present embodiment.
 
本実施形態の乳房画像撮影表示システム１は、図１に示すように、乳房画像撮影装置１０と、乳房画像撮影装置１０に接続されたコンピュータ２と、コンピュータ２に接続されたモニタ３および入力部４とを備えている。
As shown in FIG. 1, a breast image radiographing display system 1 according to this embodiment 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.
 
乳房画像撮影装置１０は、乳房Ｍに互いに異なる撮影方向から放射線を照射することでステレオ画像の撮影を行い、乳房Ｍのステレオ画像を取得し、そのステレオ画像をコンピュータ２に出力するものである。
The breast image capturing apparatus 10 captures a stereo image by irradiating the breast M with radiation from mutually different capturing directions, acquires a stereo image of the breast M, and outputs the stereo image to the computer 2.
 
具体的には、乳房画像撮影装置１０は、図１に示すように、基台１１と、基台１１に対し上下方向（Ｚ方向）に移動可能であり、かつ回転可能な回転軸１２と、回転軸１２により基台１１と連結されたアーム部１３を備えている。なお、図２には、図１の右方向から見たアーム部１３を示している。
Specifically, as shown in FIG. 1, the mammography apparatus 10 includes a base 11, a rotary shaft 12 that is movable in the vertical direction (Z direction) with respect to the base 11, and is rotatable. An arm portion 13 connected to the base 11 by a rotating shaft 12 is provided. FIG. 2 shows the arm 13 viewed from the right direction in FIG.
 
アーム部１３はアルファベットのＣの形をしており、その一端には撮影台１４が、その他端には撮影台１４と対向するように放射線源ユニット１６が取り付けられている。アーム部１３の上下方向の移動は、基台１１に組み込まれたアームコントローラ３１により制御される。
The arm portion 13 has an alphabet C shape, and a radiation source unit 16 is attached to one end of the arm portion 13 so as to face the imaging table 14 at the other end. The movement of the arm unit 13 in the vertical direction is controlled by an arm controller 31 incorporated in the base 11.
 
撮影台１４の内部には、フラットパネルディテクタ等の放射線画像検出器１５と、放射線画像検出器１５からの電荷信号の読み出しなどを制御する検出器コントローラ３３が備えられている。
A radiographic image detector 15 such as a flat panel detector and a detector controller 33 that controls reading of a charge signal from the radiographic image detector 15 are provided inside the imaging table 14.
 
また、撮影台１４の内部には、放射線画像検出器１５から読み出された電荷信号を電圧信号に変換するチャージアンプや、チャージアンプから出力された電圧信号をサンプリングする相関２重サンプリング回路や、電圧信号をデジタル信号に変換するＡＤ変換部などが設けられた回路基板なども設置されている。
Further, inside the imaging table 14, 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.
 
放射線画像検出器１５は、放射線画像の記録と読出しを繰り返して行うことができるものであり、放射線の照射を直接受けて電荷を発生する、いわゆる直接型の放射線画像検出器を用いてもよいし、放射線を一旦可視光に変換し、その可視光を電荷信号に変換する、いわゆる間接型の放射線画像検出器を用いるようにしてもよい。また、放射線画像信号の読出方式としては、ＴＦＴ（thin film transistor）スイッチをオン・オフされることによって放射線画像信号が読みだされる、いわゆるＴＦＴ読出方式のものや、読取光を照射することによって放射線画像信号が読み出される、いわゆる光読出方式のものを用いることが望ましいが、これに限らずその他のものを用いるようにしてもよい。
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. As a radiation image signal reading method, a radiation image signal is read 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.
 
放射線源ユニット１６の中には放射線源１７と、放射線源コントローラ３２が収納されている。放射線源コントローラ３２は、放射線源１７から放射線を照射するタイミングと、放射線源１７における放射線発生条件（管電流、時間、管電圧等）を制御するものである。
A radiation source 17 and a radiation source controller 32 are accommodated in the radiation source 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.
 
また、アーム部１３の中央部には、撮影台１４の上方に配置されて乳房を押さえつけて圧迫する圧迫板１８と、その圧迫板１８を支持する支持部２０と、支持部２０を上下方向に移動させる移動機構１９が設けられている。圧迫板１８の位置、圧迫圧は、圧迫板コントローラ３４により制御される。
Further, in the central part of the arm part 13, a compression plate 18 that is arranged above the imaging table 14 and presses against the breast, a support unit 20 that supports the compression plate 18, and a support unit 20 in the vertical direction. A moving mechanism 19 for moving is provided. The position of the compression plate 18 and the compression pressure are controlled by the compression plate controller 34.
 
コンピュータ２は、中央処理装置（ＣＰＵ）および半導体メモリやハードディスクやＳＳＤ等のストレージデバイスなどを備えており、これらのハードウェアによって、図３に示すような制御部２ａ、放射線画像記憶部２ｂ、画像処理部２ｃおよび表示制御部２ｄが構成されている。
The computer 2 includes a central processing unit (CPU) and a storage device such as a semiconductor memory, a hard disk, and an SSD, and the control unit 2a, the radiation image storage unit 2b, the image as shown in FIG. A processing unit 2c and a display control unit 2d are configured.
 
制御部２ａは、各種のコントローラ３１～３５に対して所定の制御信号を出力し、システム全体の制御を行うものである。具体的な制御方法については後で詳述する。
The controller 2a 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.
 
放射線画像記憶部２ｂは、乳房画像撮影装置１０によって撮影された乳房Ｍのステレオ画像を構成する右目用画像および左目用画像を記憶するものである。
The radiographic image storage unit 2b stores a right-eye image and a left-eye image that constitute a stereo image of the breast M captured by the breast image capturing apparatus 10.
 
画像処理部２ｃは、放射線画像記憶部２ｂから読み出された右目用画像および左目用画像に対して種々の画像処理を施すものである。画像処理としては、たとえば、周波数処理、階調処理、ダイナミックレンジ圧縮処理、ＰＥＭ（Pattern Enhancement Processing for Mammography）処理、濃度補正処理などがある。画像処理部２ｃは、上記のような画像処理を右目用画像と左目用画像とにこの順番で順次施し、画像処理が終了した右目用画像から順次、表示制御部２ｄに出力するものである。
The image processing unit 2c performs various image processing on the right-eye image and the left-eye image read from the radiation image storage unit 2b. Examples of the image processing include frequency processing, gradation processing, dynamic range compression processing, PEM (Pattern Enhancement Processing for Mammography) processing, density correction processing, and the like. The image processing unit 2c sequentially performs the above-described image processing on the right-eye image and the left-eye image in this order, and sequentially outputs the right-eye image after the image processing to the display control unit 2d.
 
表示制御部２ｄは、画像処理部２ｃにおいて画像処理の施された右目用画像および左目用画像に対して所定の信号処理を施した後、モニタ３にこれらの画像を同時に表示させることによって乳房Ｍのステレオ画像の静止画を表示させるものである。
The display control unit 2d performs predetermined signal processing on the image for the right eye and the image for the left eye that have been subjected to image processing in the image processing unit 2c, and then simultaneously displays these images on the monitor 3 to display the breast M. The still image of the stereo image is displayed.
 
ここで、本実施形態の表示制御部２ｄには、画像処理部２ｃから出力された処理済右目用画像と処理済左目用画像とが順次入力されるが、表示制御部２ｄは、画像処理の終了した時点が遅い処理済左目用画像が入力されるまでは処理済右目用画像の表示は行わず、処理済左目用画像が入力された時点において、すなわち左目用画像に対する画像処理が終了した時点から処理済右目用画像と処理済左目用画像とを同じ表示開始タイミングでモニタ３に表示させるものである。
Here, the processed right eye image and the processed left eye image output from the image processing unit 2c are sequentially input to the display control unit 2d of the present embodiment, but the display control unit 2d performs image processing. Until the processed left-eye image is input, the processed right-eye image is not displayed until the processed left-eye image is input. That is, when the processed left-eye image is input, that is, when the image processing for the left-eye image is completed. The processed right-eye image and the processed left-eye image are displayed on the monitor 3 at the same display start timing.
 
なお、本実施形態においては、画像処理部２ｃにおいて右目用画像に画像処理を施した後に左目用画像に画像処理を施すようにしたが、画像処理を施す順番はこの逆でもよく、左目用画像に画像処理を施した後に右目用画像に画像処理を施すようにしてもよい。その場合には、表示制御部２ｄは、画像処理の終了した時点が遅い処理済右目用画像が入力されるまでは処理済左目用画像の表示は行わず、処理済右目用画像が入力された時点において、すなわち右目用画像に対する画像処理が終了した時点から処理済右目用画像と処理済左目用画像とを同じ表示開始タイミングでモニタ３に表示させるものである。
In the present embodiment, the image processing unit 2c performs image processing on the left eye image after performing image processing on the right eye image. However, the order in which the image processing is performed may be reversed. The image processing may be performed on the right-eye image after the image processing is performed on the image. In that case, the display control unit 2d does not display the processed left-eye image until the processed right-eye image is input, which has been delayed, and the processed right-eye image is input. The processed right-eye image and the processed left-eye image are displayed on the monitor 3 at the same display start timing at the time, that is, from the time when the image processing for the right-eye image is completed.
 
モニタ３は、処理済右目用画像と処理済左目用画像とを用いてステレオ画像を表示可能なように構成されたものである。具体的には、本実施形態のモニタ３は、図４に示すように、処理済右目用画像ＧＲおよび処理済左目用画像ＧＬを表示することにより、これらの画像中の乳房を立体表示するものである。モニタ３は、図４に示すように、前方に傾斜した上方の表示部４０と下方の表示部４１とを組み合せて構成されており、この２台の表示部４０，４１の間にハーフミラー４２が配置されている。
The monitor 3 is configured to display a stereo image using the processed right-eye image and the processed left-eye image. Specifically, as shown in FIG. 4, the monitor 3 of the present embodiment displays a processed right-eye image GR and a processed left-eye image GL so as to stereoscopically display breasts in these images. It is. As shown in FIG. 4, the monitor 3 is configured by combining an upper display unit 40 and a lower display unit 41 inclined forward, and a half mirror 42 is provided between the two display units 40 and 41. Is arranged.
 
上方の表示部４０は表示画面４０ａに処理済右目用画像ＧＲ、下方の表示部４１は表示画面４１ｂに処理済左目用画像ＧＬをそれぞれ表示するものである。そして、上方の表示部４０により表示された処理済右目用画像ＧＲは、図中実線で示すようにハーフミラー４２で反射し、下方の表示部４１により表示された処理済左目用画像は、図中破線で示すようにハーフミラー４２を透過する。ハーフミラー４２は、観察の際に処理済右目用画像ＧＲと処理済左目用画像ＧＬとが重なるような角度で配置されている。
The upper display unit 40 displays the processed right-eye image GR on the display screen 40a, and the lower display unit 41 displays the processed left-eye image GL on the display screen 41b. Then, the processed right-eye image GR displayed by the upper display unit 40 is reflected by the half mirror 42 as shown by the solid line in the figure, and the processed left-eye image displayed by the lower display unit 41 is It passes through the half mirror 42 as shown by the middle broken line. The half mirror 42 is arranged at an angle such that the processed right-eye image GR and the processed left-eye image GL overlap each other during observation.
 
そして、モニタ３は、表示部４０、４１の表示光を互いに直交する偏光とすることが可能に構成されている。観察者は、処理済右目用画像ＧＲが右目のみに入射するように偏向する右目用偏光レンズと処理済左目用画像ＧＬが左目のみに入射するように偏光する左目用偏光レンズを有する偏光メガネを装着することにより、これらの画像を左右の目でそれぞれ観察することができ、乳房Ｍを立体視できる。
And the monitor 3 is comprised so that the display light of the display parts 40 and 41 can be made into the mutually orthogonally polarized light. The observer wears polarizing glasses having a right-eye polarizing lens that deflects so that the processed right-eye image GR is incident only on the right eye and a left-eye polarizing lens that polarizes the processed left-eye image GL so that it is incident only on the left eye. By wearing, these images can be observed with the left and right eyes, and the breast M can be viewed stereoscopically.
 
なお、モニタ３はこのような構成に限らず、たとえば、パララックスバリア方式およびレンチキュラー方式のように、処理済右目用画像と処理済左目用画像とを立体視可能な３Ｄ液晶に表示することによってステレオ画像を生成する構成としてもよい。
The monitor 3 is not limited to such a configuration. For example, the processed right-eye image and the processed left-eye image are displayed on a 3D liquid crystal that can be viewed stereoscopically, as in the parallax barrier method and the lenticular method. It is good also as a structure which produces | generates a stereo image.
 
入力部４は、たとえば、キーボードやマウスなどのポインティングデバイスから構成されるものであり、乳房画像撮影装置１０における撮影条件や撮影開始指示の入力などを受け付けるものであるとともに、画像処理部２ｃにおける画像処理の変更を受け付けるものである。具体的には、所定の画像処理の追加や削除、または所定の画像処理の画像処理条件（画像処理パラメータなど）の変更を受け付けるものである。
The input unit 4 is configured by a pointing device such as a keyboard and a mouse, for example, and accepts input of imaging conditions and an imaging start instruction in the mammography apparatus 10, and an image in the image processing unit 2c. The process change is accepted. Specifically, addition or deletion of predetermined image processing, or change of image processing conditions (such as image processing parameters) for predetermined image processing is accepted.
 
次に、本実施形態の乳房画像撮影表示システムの作用について説明する。
Next, the operation of the mammography / display system of the present embodiment will be described.
 
まずは、乳房画像撮影表示システムの乳房画像撮影装置１０によって乳房Ｍのステレオ画像の撮影を行う場合について図１および図２を参照しながら説明する。
First, a case where a stereo image of the breast M is captured by the breast image capturing apparatus 10 of the breast image capturing and displaying system will be described with reference to FIGS. 1 and 2.
 
まず、撮影台１４の上に乳房Ｍが設置され、圧迫板１８により乳房Ｍが所定の圧力で圧迫される。
First, the breast M is set on the imaging table 14, and the breast M is compressed with a predetermined pressure by the compression plate 18.
 
次に、入力部４において、撮影者による乳房Ｍのステレオ撮影の開始指示が入力され、ステレオ撮影が開始される。
Next, in the input unit 4, an instruction to start stereo photography of the breast M by the photographer is input, and stereo photography is started.
 
具体的には、入力部４における撮影開始指示入力に応じて制御部２ａは、予め設定されたステレオ画像の撮影のための撮影角度θを読み出し、その読み出した撮影角度θの情報をアームコントローラ３１に出力する。なお、本実施形態においては、撮影角度θとは、図２に示すように放射線画像検出器１５の検出面に対して垂直な直線と放射線源１７から出される放射線の光軸とがなす角のことをいう。そして、本実施形態においては、撮影角度θとして０°と４°とが予め記憶されているものとするが、これに限らず、撮影者によって入力部４において任意の撮影角度を設定可能である。
Specifically, in response to a shooting start instruction input from the input unit 4, the control unit 2 a reads a shooting angle θ for shooting a preset stereo image and uses the read information on the shooting angle θ as the arm controller 31. Output to. In the present embodiment, the imaging angle θ is an angle formed by a straight line perpendicular to the detection surface of the radiation image detector 15 and the optical axis of the radiation emitted from the radiation source 17, as shown in FIG. That means. In this embodiment, it is assumed that 0 ° and 4 ° are stored in advance as the shooting angle θ. However, the present invention is not limited to this, and an arbitrary shooting angle can be set by the photographer in the input unit 4. .
 
そして、アームコントローラ３１において、制御部２ａから出力された撮影角度θの情報が受け付けられ、アームコントローラ３１は、その撮影角度θに応じた制御信号をアーム部１３に出力する。
Then, the arm controller 31 receives information on the shooting angle θ output from the control unit 2 a, and the arm controller 31 outputs a control signal corresponding to the shooting angle θ to the arm unit 13.
アーム部１３は、入力された撮影角度θに応じた制御信号に基づいて回転し、その結果、アーム部１３の撮影角度が０°に設定される。続いて、制御部２ａは、放射線源コントローラ３２および検出器コントローラ３３に対して放射線の照射と放射線画像信号の読出しを行うよう制御信号を出力する。この制御信号に応じて、放射線源１７から放射線が射出され、乳房を０°方向から撮影した放射線画像が放射線画像検出器１５によって検出され、検出器コントローラ３３によって放射線画像信号が読み出され、右目用画像ＧＲを表す放射線画像信号としてコンピュータ２の放射線画像記憶部２ｂに記憶される。 The arm unit 13 rotates based on a control signal corresponding to the input shooting angle θ, and as a result, the shooting angle of the arm unit 13 is set to 0 °. Subsequently, the control unit 2a outputs a control signal to the radiation source controller 32 and the detector controller 33 so as to perform radiation irradiation and readout of the radiation image signal. In accordance with this control signal, radiation is emitted from the radiation source 17, a radiation image obtained by photographing the breast from the 0 ° direction is detected by the radiation image detector 15, and the radiation image signal is read by the detector controller 33, so that the right eye It is stored in the radiation image storage unit 2b of the computer 2 as a radiation image signal representing the image for use GR.
 
次に、アームコントローラ３１は、撮影角度θ＝４°の情報に基づいて、アーム部１３が放射線画像検出器１５の検出面に対して４°の方向となるように制御信号を出力する。
Next, the arm controller 31 outputs a control signal based on the information of the imaging angle θ = 4 ° so that the arm unit 13 is in the direction of 4 ° with respect to the detection surface of the radiation image detector 15.
そして、このアームコントローラ３１から出力された制御信号に応じてアーム部１３が撮影角度θ＝４°に設定された後、上記と同様にして放射線の照射と放射線画像の検出とが行われ、放射線画像検出器１５から出力された放射線画像信号が、左目用画像ＧＬを表す放射線画像信号としてコンピュータ２の放射線画像記憶部２ｂに記憶される。 Then, after the arm unit 13 is set to the imaging angle θ = 4 ° in accordance with the control signal output from the arm controller 31, radiation irradiation and radiation image detection are performed in the same manner as described above. The radiation image signal output from the image detector 15 is stored in the radiation image storage unit 2b of the computer 2 as a radiation image signal representing the left-eye image GL.
 
次に、上述したようにして記憶された右目用画像と左目用画像の放射線画像信号に基づいてモニタ３においてステレオ画像を表示する作用について、図５に示すフローチャートを参照しながら説明する。
Next, the operation of displaying a stereo image on the monitor 3 based on the radiographic image signals of the right-eye image and the left-eye image stored as described above will be described with reference to the flowchart shown in FIG.
 
まず、入力部４において観察者による表示開始指示が受け付けられる（Ｓ１０）。制御部２ａは、観察者による表示開始指示が受け付けられると放射線画像記憶部２ｂに記憶された右目用画像と左目用画像の放射線画像信号を読み出して画像処理部２ｃに出力する。
First, a display start instruction by an observer is received in the input unit 4 (S10). When the display start instruction by the observer is received, the control unit 2a reads out the radiographic image signals of the right eye image and the left eye image stored in the radiographic image storage unit 2b and outputs them to the image processing unit 2c.
 
そして、画像処理部２ｃは、まず、入力された右目用画像の放射線画像信号に対して画像処理を施し、その処理済右目用画像の放射線画像信号を表示制御部２ｄに出力する（Ｓ１４）。表示制御部２ｄは、この時点においてはまだ処理済右目用画像を表示しない。
The image processing unit 2c first performs image processing on the input radiographic image signal of the right-eye image, and outputs the processed radiographic image signal of the right-eye image to the display control unit 2d (S14). The display control unit 2d does not display the processed right eye image yet at this time.
 
次に、画像処理部２ｃは、入力された左目用画像の放射線画像信号に対して画像処理を施し、その処理済左目用画像の放射線画像信号を表示制御部２ｄに出力する（Ｓ１６）。
Next, the image processing unit 2c performs image processing on the input radiation image signal of the left-eye image, and outputs the processed radiation image signal of the left-eye image to the display control unit 2d (S16).
 
そして、表示制御部２ｄは、処理済左目用画像が入力された時点において、すなわち左目用画像に対する画像処理が終了した時点から処理済右目用画像と処理済左目用画像とを同じ表示開始タイミングでモニタ３に表示させる（Ｓ１８）。なお、このとき表示制御部２ｄは、図４に示すように、各乳房Ｍの画像が鏡像関係を有し、且つ胸壁ＭＷが水平となる状態で左目用画像ＧＬおよび右目用画像ＧＲを表示する。
The display control unit 2d then displays the processed right-eye image and the processed left-eye image at the same display start timing when the processed left-eye image is input, that is, from the time when the image processing on the left-eye image is completed. It is displayed on the monitor 3 (S18). At this time, as shown in FIG. 4, the display control unit 2d displays the left-eye image GL and the right-eye image GR in a state where the images of the breasts M have a mirror image relationship and the chest wall MW is horizontal. .
 
次いで、観察者が画像処理を変更したいと思った場合には、入力部４において画像処理の変更の指示が受け付けられる（Ｓ２０，ＹＥＳ）。
Next, when the observer wants to change the image processing, the input unit 4 receives an instruction to change the image processing (S20, YES).
 
画像処理部２ｃは、入力部４において画像処理の変更指示が受け付けられると、まず、右目用画像の放射線画像信号に対して変更後の画像処理を施し、その処理済右目用画像の放射線画像信号を表示制御部２ｄに出力する（Ｓ２２）。表示制御部２ｄは、この時点においてはまだ処理済右目用画像を表示しない。
When the image processing unit 2c receives an instruction to change the image processing in the input unit 4, the image processing unit 2c first performs the post-change image processing on the radiographic image signal of the right-eye image, and then performs the radiographic image signal of the processed right-eye image. Is output to the display control unit 2d (S22). The display control unit 2d does not display the processed right eye image yet at this time.
 
次に、画像処理部２ｃは、左目用画像の放射線画像信号に対して変更後の画像処理を施し、その処理済左目用画像の放射線画像信号を表示制御部２ｄに出力する（Ｓ２４）。
Next, the image processing unit 2c performs post-change image processing on the radiation image signal of the left-eye image, and outputs the processed radiation image signal of the left-eye image to the display control unit 2d (S24).
 
そして、表示制御部２ｄは、処理済左目用画像が入力された時点において、すなわち左目用画像に対する変更後の画像処理が終了した時点から処理済右目用画像と処理済左目用画像とを同じ表示開始タイミングでモニタ３に表示させる（Ｓ１８）。
Then, the display control unit 2d displays the same processed right-eye image and processed left-eye image at the time when the processed left-eye image is input, that is, from the time when the modified image processing for the left-eye image is completed. It is displayed on the monitor 3 at the start timing (S18).
 
そして、Ｓ２０において、画像処理の変更がなく、次のステレオ画像に切り替えて表示する場合には（Ｓ２６，ＹＥＳ）、再びＳ１０に戻り、次のステレオ画像の表示開始指示の受け付けが行われる。
In S20, when there is no change in image processing and the display is switched to the next stereo image (S26, YES), the process returns to S10 again, and an instruction to start displaying the next stereo image is accepted.
 
なお、上記実施形態においては、右目用画像に対する画像処理と左目用画像に対する画像処理とを順番に行うようにしたが、これに限らず、右目用画像に対する画像処理と左目用画像に対する画像処理とを並列に行うようにしてもよい。その場合においても、表示制御部２ｄは、いずれか遅い方の画像処理が終了した時点から処理済右目用画像と処理済左目用画像とを同じ表示開始タイミングでモニタ３に表示させる。
In the above embodiment, the image processing for the right-eye image and the image processing for the left-eye image are sequentially performed. However, the present invention is not limited thereto, and the image processing for the right-eye image and the image processing for the left-eye image are performed. May be performed in parallel. Even in such a case, the display control unit 2d causes the monitor 3 to display the processed right-eye image and the processed left-eye image at the same display start timing from the later of the later image processing.
 
また、上記実施形態においては、本発明の立体視画像表示装置を乳房画像撮影表示システムに適用するようにしたが、被写体は乳房に限定されるものではなく、乳房以外の胸部撮影用などのいわゆる一般撮影用の放射線画像撮影表示システムに適用するようにしてもよい。
In the above embodiment, the stereoscopic image display apparatus of the present invention is applied to the mammography imaging display system. However, the subject is not limited to the breast, and is a so-called imaging for breasts other than the breast. You may make it apply to the radiographic imaging display system for general imaging.

Claims (5)

  1. 　互いに異なる方向から被写体を撮影した右目用画像および左目用画像を取得し、該右目用画像および左目用画像に対して画像処理を施す画像処理部と、該画像処理部において画像処理の施された処理済右目用画像と処理済左目用画像とを同時に表示して静止画の立体視画像を表示する表示部とを備えた立体視画像表示装置において、
    　前記右目用画像に対する画像処理と前記左目用画像に対する画像処理との両方が終了した時点以降に、前記処理済右目用画像と前記処理済左目用画像とを同じ表示開始タイミングで表示するよう前記表示部を制御する表示制御部を備えたことを特徴とする立体視画像表示装置。     An image processing unit that obtains a right-eye image and a left-eye image obtained by photographing a subject from different directions and performs image processing on the right-eye image and the left-eye image, and image processing is performed in the image processing unit In a stereoscopic image display device including a display unit that displays a processed right-eye image and a processed left-eye image simultaneously to display a stereoscopic image of a still image,
    The display so that the processed right-eye image and the processed left-eye image are displayed at the same display start timing after both the image processing for the right-eye image and the image processing for the left-eye image are completed. A stereoscopic image display device comprising a display control unit for controlling the unit.
  2. 　前記表示制御部が、前記右目用画像に対する画像処理および前記左目用画像に対する画像処理のうちの終了タイミングが遅い方の画像処理が終了した時点から前記処理済右目用画像と前記処理済左目用画像と表示するものであることを特徴とする請求項１記載の立体視画像表示装置。 The processed right eye image and the processed left eye image from the point in time when the display control unit ends the later image processing of the image processing for the right eye image and the image processing for the left eye image. The stereoscopic image display device according to claim 1, wherein the stereoscopic image display device is displayed.
  3. 　前記画像処理部における画像処理の変更を受け付ける画像処理変更受付部を備え、
    　前記表示制御部が、前記右目用画像に対する前記変更後の画像処理と前記左目用画像に対する前記変更後の画像処理との両方が終了した時点以降に、前記処理済右目用画像と前記処理済左目用画像とを同じ表示開始タイミングで表示するよう前記表示部を制御するものであることを特徴とする請求項１または２記載の立体視画像表示装置。     An image processing change receiving unit for receiving a change in image processing in the image processing unit;
    The processed right eye image and the processed left eye after the time point when the display control unit finishes both the changed image processing for the right eye image and the changed image processing for the left eye image. The stereoscopic image display apparatus according to claim 1, wherein the display unit is controlled so as to display an image for use at the same display start timing.
  4. 　前記表示制御部が、前記右目用画像に対する前記変更後の画像処理および前記左目用画像に対する前記変更後の画像処理のうちの終了タイミングが遅い方の画像処理が終了した時点から前記処理済右目用画像と前記処理済左目用画像と表示するものであることを特徴とする請求項３記載の立体視画像表示装置。 The display control unit performs the processing for the right eye after the end of the later image processing of the image processing after the change for the image for the right eye and the image processing after the change for the image for the left eye. The stereoscopic image display device according to claim 3, wherein the stereoscopic image display device displays an image and the processed left-eye image.
  5. 　互いに異なる方向から被写体を撮影した右目用画像および左目用画像を取得して該右目用画像および左目用画像に対して画像処理を施し、該画像処理の施された処理済右目用画像と処理済左目用画像とを同時に表示して静止画の立体視画像を表示する立体視画像表示方法において、
    　前記右目用画像に対する画像処理と前記左目用画像に対する画像処理との両方が終了した時点以降に、前記処理済右目用画像と前記処理済左目用画像とを同じ表示開始タイミングで表示することを特徴とする立体視画像表示方法。

          A right-eye image and a left-eye image obtained by photographing subjects from different directions are obtained, image processing is performed on the right-eye image and left-eye image, and the processed right-eye image and the processed image are processed. In a stereoscopic image display method for displaying a left-eye image and displaying a stereoscopic image of a still image at the same time,
    The processed right-eye image and the processed left-eye image are displayed at the same display start timing after both the image processing for the right-eye image and the image processing for the left-eye image are completed. A stereoscopic image display method.

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