WO2011043022A1 - 画像表示装置および画像表示方法 - Google Patents
画像表示装置および画像表示方法 Download PDFInfo
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- WO2011043022A1 WO2011043022A1 PCT/JP2010/005701 JP2010005701W WO2011043022A1 WO 2011043022 A1 WO2011043022 A1 WO 2011043022A1 JP 2010005701 W JP2010005701 W JP 2010005701W WO 2011043022 A1 WO2011043022 A1 WO 2011043022A1
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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
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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
-
- 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
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
- G09G5/39—Control of the bit-mapped memory
- G09G5/393—Arrangements for updating the contents of the bit-mapped memory
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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
- H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
- H04N13/106—Processing image signals
- H04N13/111—Transformation of image signals corresponding to virtual viewpoints, e.g. spatial image interpolation
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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
- H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
- H04N13/305—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using lenticular lenses, e.g. arrangements of cylindrical lenses
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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
- H04N13/349—Multi-view displays for displaying three or more geometrical viewpoints without viewer tracking
- H04N13/351—Multi-view displays for displaying three or more geometrical viewpoints without viewer tracking for displaying simultaneously
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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
- G09G2340/00—Aspects of display data processing
- G09G2340/04—Changes in size, position or resolution of an image
- G09G2340/0464—Positioning
- G09G2340/0478—Horizontal positioning
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
- G09G5/363—Graphics controllers
Definitions
- the present invention relates to an image display device and an image display method.
- Patent Document 1 Japanese Patent Laid-Open No. 5-210181
- an object of one aspect of the present invention is to provide an image display device and an image display method that can solve the above-described problems. This object is achieved by a combination of features described in the independent claims.
- the dependent claims define further advantageous specific examples of the present invention.
- an image display device that displays a plurality of sets of images for the right eye and images for the left eye toward the corresponding viewpoints, and the right corresponding to the two predetermined viewpoints.
- a multi-viewpoint image generation unit that generates a right-eye image and a left-eye image for a plurality of viewpoints by receiving the image and the left image, and shifting the entire received right image and left image, respectively, and multi-viewpoint image generation
- An image display device including a display unit that displays a right-eye image and a left-eye image generated by the unit toward a corresponding viewpoint, and an image display method using the image display device are provided.
- FIG. 2 is a diagram illustrating a configuration example of an image processing unit 10.
- FIG. It is a figure which shows an example of the left image and right image which the image acquisition part 12 acquired.
- 6 is a diagram illustrating an operation example of a multi-viewpoint image generation unit 14.
- FIG. 6 is a diagram illustrating an operation example of the display unit 50.
- FIG. 3 is a diagram illustrating a configuration example of a display unit 50.
- FIG. 3 is a diagram illustrating another configuration example of the image processing unit 10.
- 3 is a diagram illustrating a configuration example of a multi-viewpoint image generation unit 14.
- FIG. 11 is a diagram illustrating another configuration example of the display unit 50.
- 3 is a diagram illustrating another configuration example of the image processing unit 10.
- FIG. 3 is a diagram illustrating another configuration example of the image processing unit 10.
- FIG. 3 is a diagram illustrating another configuration example of the
- FIG. 1 is a diagram illustrating a configuration example of an image display device 100 according to one embodiment.
- the image display apparatus 100 displays a plurality of sets of right images and left images from the corresponding viewpoint 1 to viewpoint n.
- One viewpoint corresponds to the position of the user's right eye or left eye, for example. That is, the image display apparatus 100 displays a set of right image and left image with respect to two adjacent viewpoints. Further, the image display device 100 generates a right image or a left image corresponding to each viewpoint from a given two-dimensional image.
- the image display device 100 of this example includes an image processing unit 10 and a display unit 50.
- the image processing unit 10 acquires a two-dimensional image.
- the image processing unit 10 may acquire one two-dimensional image corresponding to one viewpoint, or may acquire two two-dimensional images corresponding to two viewpoints. In the latter case, the two two-dimensional images may be stereo images obtained by capturing the subject from two positions corresponding to the positions of both eyes of a human.
- the image processing unit 10 generates n images corresponding to n (for example, an even number of 4 or more) viewpoints from the acquired two-dimensional image.
- n for example, an even number of 4 or more
- the image processing unit 10 generates n / 2 right-eye images and n / 2 left-eye images.
- the right-eye image is an image to be displayed on the user's right eye
- the left-eye image may be an image to be displayed on the user's left eye.
- the display unit 50 displays n images generated by the image processing unit 10 toward n viewpoints.
- the display unit 50 displays n images toward n viewpoints by a lenticular method or a parallax barrier method.
- the display unit 50 of this example displays a stereoscopic image for multiple viewpoints by displaying the corresponding right-eye image and left-eye image toward the adjacent viewpoints.
- FIG. 2 is a diagram illustrating a configuration example of the image processing unit 10.
- the image processing unit 10 in this example acquires a right image and a left image for two predetermined viewpoints.
- the two predetermined viewpoints may be viewpoints corresponding to the right eye and the left eye of the user. That is, the right image and the left image may be the above-described stereo image.
- the image processing unit 10 of this example includes an image acquisition unit 12 and a multi-viewpoint image generation unit 14.
- the image acquisition unit 12 acquires a right image and a left image for two predetermined viewpoints.
- the image acquisition unit 12 may acquire the right image and the left image from an external device, and may acquire the right image and the left image by imaging the subject from two different positions.
- the multi-viewpoint image generation unit 14 receives a right image and a left image for two predetermined viewpoints from the image acquisition unit 12, and shifts the received right image and the entire left image, respectively, so that a predetermined two viewpoints are obtained. Generates an image for the right eye and an image for the left eye for different viewpoints. That is, the display unit 50 displays a stereoscopic image in which the position of the subject is shifted for each viewpoint. Thereby, a stereoscopic image corresponding to each viewpoint can be displayed.
- the multi-viewpoint image generation unit 14 of this example supplies the right-eye image and the left-eye image for the n viewpoints to the display unit 50 together with the right image and the left image received from the image acquisition unit 12. More specifically, the multi-viewpoint image generation unit 14 supplies the display unit 50 with right-eye images for n / 2 viewpoints and left-eye images for n / 2 viewpoints.
- the display unit 50 receives the right image and the left image received by the image acquisition unit 12 and the image generated by the multi-viewpoint image generation unit 14 and displays them for the corresponding viewpoints.
- the display unit 50 may display each image in parallel.
- FIG. 3 is a diagram illustrating an example of the left image and the right image acquired by the image acquisition unit 12.
- the left image and the right image in this example are stereo images obtained by capturing the same subject from two different positions corresponding to both human eyes. Note that the subject in the left image and the right image has a parallax corresponding to the distance from the imaging device to the subject.
- the subject 62 has a parallax d1 between the left and right images
- the subject 64 has a parallax d2 between the left and right images.
- FIG. 4 is a diagram illustrating an operation example of the multi-viewpoint image generation unit 14.
- n / 2 left-eye images are generated based on the left image received from the image acquisition unit 12 will be described.
- n / The same applies when two right-eye images are generated.
- the multi-viewpoint image generation unit 14 generates n / 2 left-eye images by sequentially shifting the entire received left image by a predetermined shift amount.
- the multi-viewpoint image generation unit 14 includes a plurality of right-shifted left-eye images that are sequentially shifted rightward by shift amounts da and a plurality of left images that are sequentially shifted leftward by shift amounts da. A shifted left-eye image is generated.
- the multi-viewpoint image generation unit 14 generates three right-shifted left eye images and three left-shifted left eye images in addition to the original left image. It's okay.
- the multi-viewpoint image generation unit 14 may generate six right-shifted left eye images, or may generate six left-shifted left eye images.
- FIG. 5 is a diagram illustrating an operation example of the display unit 50.
- the display unit 50 of this example displays a plurality of right-eye images and a plurality of left-eye images generated by the multi-viewpoint image generation unit 14 in parallel in the same frame.
- the display unit 50 includes a plurality of left-eye images in which the entire original left image is sequentially shifted in the x-axis direction. L (3)) is extracted from (-3).
- the display unit 50 displays the pixel columns at the same position on the x-axis (in this example, R ( ⁇ 3) to R ( 3)) is extracted.
- the pixel column may have a width in the x-axis direction of one pixel or a plurality of pixels.
- the display unit 50 displays a region at the same position on the x-axis in the plurality of left-eye images and right-eye images in a predetermined arrangement in a region corresponding to the position on the x-axis on the display surface. .
- the display unit 50 alternately displays each pixel column in the plurality of left-eye images and right-eye images by a predetermined number of columns.
- the display unit 50 alternately displays the pixel columns of the left eye image and the right eye image one by one.
- corresponding regions in the plurality of right-eye images and left-eye images are displayed in a predetermined arrangement.
- FIG. 6 is a diagram illustrating a configuration example of the display unit 50.
- the display unit 50 of this example includes a lens array 54 and a display element 52. As described with reference to FIG. 5, the display element 52 displays each pixel column of the plurality of left-eye images and right-eye images in a predetermined arrangement.
- the lens array 54 has a plurality of lenses arranged in a predetermined pattern.
- the lens array 54 may be a lenticular lens array having a plurality of semi-cylindrical lenses arranged at a predetermined pitch along the x-axis direction.
- a multi-viewpoint left-eye image and right-eye image can be easily generated from a given set of right and left images. Further, the generated left-eye image and right-eye image for multiple viewpoints can be displayed at the corresponding viewpoints.
- the display unit 50 of this example is a lenticular method has been described, the display unit 50 may be a parallax barrier method.
- the multi-viewpoint image generation unit 14 has a maximum shift amount between images generated from the right image and the left image acquired by the image acquisition unit 12 smaller than the maximum parallax amount between the right image and the left image. It is preferable to generate a shift image for each viewpoint. For example, referring to the examples of FIGS. 3 and 4, the multi-viewpoint image generation unit 14 determines that the shift amount 6da between the left-eye image at the left end and the left-eye image at the right end is the maximum parallax amount d1.
- the unit shift amount da is set so as to be sufficiently smaller than that.
- the multi-viewpoint image generation unit 14 sets the unit shift amount da so that the maximum shift amount 6da in the right-eye image is sufficiently smaller than the maximum parallax amount d1.
- the unit shift amount da is the same in the right-eye image and the left-eye image.
- the multi-viewpoint image generation unit 14 generates the left-eye image and the right-eye image obtained by sequentially shifting the original left image and the right image by the uniform shift amount da.
- the multi-viewpoint image generation unit 14 may generate a left-eye image and a right-eye image obtained by sequentially shifting the original image with a non-uniform shift amount.
- the shift amount with respect to the adjacent left-eye image and right-eye image is relatively small, and the end portion
- the shift amount with respect to the adjacent left-eye image and right-eye image is relatively large.
- the difference in displayed images is small, so that the images can be switched smoothly.
- the shift amount with respect to the adjacent left-eye image and right-eye image is relatively increased, and the end portion For the left-eye image and the right-eye image corresponding to the nearby viewpoint, the shift amount with respect to the adjacent left-eye image and right-eye image may be relatively small.
- the images can be switched smoothly.
- FIG. 7 is a diagram illustrating another configuration example of the image processing unit 10.
- the image processing unit 10 of this example includes an image acquisition unit 12, a left / right image generation unit 16, and a multi-viewpoint image generation unit 14.
- the image acquisition unit 12 acquires one two-dimensional image.
- the image acquisition unit 12 may acquire a two-dimensional image from an external device, or may acquire a two-dimensional image by imaging a subject.
- the left and right image generation unit 16 generates a right image and a left image for two adjacent viewpoints among a plurality of viewpoints by shifting the entire two-dimensional image acquired by the image acquisition unit 12, and a multi-viewpoint image generation unit 14
- the left and right image generation unit 16 may shift the entire two-dimensional image by an eye width shift amount corresponding to the distance between human eyes.
- the left and right image generation unit 16 shifts the entire two-dimensional image so that the shift amount between the generated right image and the left image becomes an eye width shift amount of about 6.5 cm, thereby shifting the right image and the left image. Is generated.
- the multi-viewpoint image generation unit 14 generates n / 2 right eye images and left eye images based on the right image and the left image received from the left and right image generation unit 16.
- the process in which the multi-view image generation unit 14 generates a plurality of right-eye images and left-eye images may be the same as that of the multi-view image generation unit 14 described with reference to FIG. With such a configuration, a multi-viewpoint left-eye image and a right-eye image can be easily generated from one two-dimensional image.
- FIG. 8 is a diagram illustrating a processing example in the left and right image generation unit 16.
- the left and right image generation unit 16 generates a left image and a right image in which the entire image is relatively shifted in the x-axis direction by a predetermined eye width shift amount d based on the received two-dimensional image.
- a stereoscopic image in which each subject exists at infinity can be provided.
- the multi-viewpoint image generation unit 14 has a maximum shift amount of each of the left-eye image and the right-eye image generated from the right image and the left image that is larger than the eye width shift amount d in the left-right image generation unit 16. It is preferable to generate a right image and a left image for each viewpoint so as to be smaller. Similarly to the multi-viewpoint image generation unit 14 described with reference to FIG. 2, the multi-viewpoint image generation unit 14 outputs the left-eye image and the right-eye image obtained by sequentially shifting the left and right images with a non-uniform shift amount. It may be generated.
- FIG. 9 is a diagram illustrating a configuration example of the multi-viewpoint image generation unit 14.
- the multi-viewpoint image generation unit 14 of this example includes a memory 30, a plurality of delay units 32, an output unit 34, and a control unit 36. 9 illustrates a configuration for processing either the left image or the right image in the configuration of the multi-viewpoint image generation unit 14, but the multi-viewpoint image generation unit 14 has the same configuration as that of FIG. Or further to process the other of the right images.
- the memory 30 stores the right image or the left image, and outputs data in units of pixel columns in order from the end pixel column.
- the pixel column refers to a pixel column along a direction perpendicular to the above-described x-axis direction.
- a number of delay units 32 (n / 2 in this example) corresponding to the number of viewpoints are provided in cascade connection. That is, the plurality of delay units 32 correspond to n / 2 left-eye images or right-eye images output from the multi-viewpoint image generation unit 14 with respect to the left image or the right image.
- the control unit 36 sets the delay amount in each delay unit 32 according to the shift amount in the corresponding left-eye image and right-eye image. For example, with respect to the delay unit 32 corresponding to the left-eye image or the right-eye image whose shift amount with respect to the immediately previous left-eye image or right-eye image is a 10-pixel array, the control unit 36 uses the memories 30 to 10. The time for reading out the pixel column is set as the delay time. As described above, the control unit 36 may set a uniform delay amount corresponding to the uniform shift amount, or may set a non-uniform delay amount corresponding to the non-uniform shift amount.
- the output unit 34 receives the data of the pixel columns output from the plurality of delay units 32 in parallel. As described above, since each delay unit 32 delays data from the memory 30 by a delay amount corresponding to the shift amount, the output unit 34 outputs the pixel columns L (3) and L (2) shown in FIG. ..,... Are received in parallel such that the positions in the image are shifted in the x-axis direction.
- the output unit 34 supplies the display unit 50 with composite data in which pixel columns received in parallel are arranged in a predetermined order.
- the display unit 50 displays a large number of viewpoint images on one screen, a pixel row is thinned out for an image for one viewpoint compared to the original image.
- the output unit 34 generates one composite data and supplies it to the display unit 50 for each period in which the number of pixel columns corresponding to the number of viewpoints is read from the memory 30, so that the pixel columns correspond to the number of viewpoints. Data obtained by thinning out may be generated.
- FIG. 10 is a diagram illustrating another configuration example of the display unit 50.
- the display unit 50 of this example includes a display element 52 and a barrier unit 56.
- a transmission unit that transmits light and a shielding unit that blocks light are arranged in a predetermined arrangement pattern.
- shutter elements for controlling whether or not to transmit light are formed in a matrix, and the arrangement pattern can be changed by controlling whether or not each shutter element transmits light.
- the barrier unit 56 may include a liquid crystal panel.
- the display element 52 may be the same as the display element 52 described with reference to FIG.
- the display element 52 displays an area corresponding to the arrangement pattern of the transmission part and the shielding part in the barrier unit 56 of each shift image toward the barrier unit 56.
- strip-shaped transmission portions and shielding portions having a predetermined width from the upper end to the lower end of the display element 52 may be alternately arranged in a region facing the display element 52.
- the display element 52 extracts a strip-like pixel column having a width obtained by dividing the width of the transmission part of the barrier unit 56 by the number of viewpoints from each shift image, and the pixel column of each shift image is previously stored. Display in a defined sequence.
- the display element 52 may change the pattern of the region extracted from the left-eye image and the right-eye image in accordance with the change in the arrangement pattern of the transmission part and the shielding part in the barrier part 56. For example, when the width of the strip-shaped transmission part in the barrier unit 56 is changed, the width of the pixel column extracted from each of the left-eye image and the right-eye image is adjusted according to the changed width of the transmission part To do.
- the arrangement pattern of the transmission part and the shielding part of the barrier part 56 can have various patterns.
- the transmission part and the shielding part of the barrier part 56 may be provided obliquely from the upper end to the lower end of the display element 52, or may be provided from the right end to the left end of the display element 52.
- the transmission part and the shielding part of the barrier part 56 may be arranged in a staggered manner. That is, the transmission part and the shielding part of the barrier part 56 may be alternately arranged in both the vertical direction and the horizontal direction of the display element 52.
- the display element 52 may determine the shape of the region to be extracted from the left-eye image and the right-eye image in accordance with the arrangement pattern of the transmission part and the shielding part of the barrier part 56.
- FIG. 11 is a diagram illustrating another configuration example of the image processing unit 10.
- the image processing unit 10 of this example further includes a viewpoint setting unit 20 in addition to the configuration of any one of the image processing units 10 described with reference to FIGS.
- a configuration in which the viewpoint setting unit 20 is added to the configuration of the image processing unit 10 described with reference to FIG. 2 will be described.
- the viewpoint setting unit 20 sets the number of viewpoints n for the multi-viewpoint image generation unit 14.
- the viewpoint setting unit 20 may set the number of viewpoints n in the multi-viewpoint image generation unit 14 according to the number of viewpoints set by the user or the like.
- the multi-viewpoint image generation unit 14 generates a shift image corresponding to each viewpoint according to the set number of viewpoints n. Further, the multi-viewpoint image generation unit 14 may change the shift amount in the left-eye image and the right-eye image according to the set number of viewpoints n. For example, the multi-viewpoint image generation unit 14 calculates the shift amounts of the left-eye image and the right-eye image by dividing a preset total shift amount by a number corresponding to the set number of viewpoints. To do.
- the viewpoint setting unit 20 may include a subject determination unit 22 that sets the number of viewpoints in the multi-viewpoint image generation unit 14 based on subjects included in the image acquired by the image acquisition unit 12.
- the subject determination unit 22 may relatively reduce the number of viewpoints in the multi-viewpoint image generation unit 14 when a subject that preferably displays an image with higher resolution is included in the image. More specifically, the subject determination unit 22 may reduce the number of viewpoints in the multi-viewpoint image generation unit 14 when the spatial frequency of the subject included in the image acquired by the image acquisition unit 12 is higher.
- the viewpoint setting unit 20 acquires distance information of the subject included in the image acquired by the image acquisition unit 12, and sets the number of viewpoints in the multi-viewpoint image generation unit 14 according to the acquired distance information.
- a portion 24 may be included.
- the distance acquisition unit 24 may acquire shooting condition data attached to the image.
- the distance acquisition unit 24 may acquire subject distance information based on the amount of parallax of the subject included in the right image and the left image. .
- the distance acquisition unit 24 may increase the number of viewpoints in the multi-viewpoint image generation unit 14 when the distance to the subject is closer.
- the viewpoint setting unit 20 may set the number of viewpoints in the multi-viewpoint image generation unit 14 by combining the subject determination unit 22 and the distance acquisition unit 24.
- the multi-viewpoint image generation unit 14 may change the shift amount of the left-eye image and the right-eye image with respect to the adjacent left-eye image and right-eye image based on the position of the user. For example, for the left-eye image and the right-eye image corresponding to the viewpoint closer to the user's position, the shift amount is made smaller. Thereby, the motion of the image can be smoothed from the viewpoint near the user's position.
- the image processing unit 10 may further include a position detection unit that detects the position of the user and notifies the multi-viewpoint image generation unit 14.
- the position detection unit includes an imaging device such as a CCD element.
- FIG. 12 is a diagram illustrating another configuration example of the image processing unit 10.
- the image processing unit 10 of this example further includes an image evaluation unit 40 and an interpolated image generation unit 38 in addition to the configuration of any one of the image processing units 10 described with reference to FIGS.
- FIG. 12 shows a configuration in which an image evaluation unit 40 and an interpolated image generation unit 38 are added to the configuration of the image processing unit 10 described with reference to FIG.
- Other configurations may be the same as any one of the image processing units 10 described with reference to FIGS. 1 to 11.
- the interpolated image generation unit 38 separates the right-eye image and the left image for a plurality of viewpoints separately from the multi-view image generation unit 14 based on the relationship between corresponding points in the right image and the left image given to the multi-view image generation unit 14. An ophthalmic image is generated.
- the interpolated image generation unit 38 may calculate a motion vector between corresponding points in the right image and the left image, and may calculate parallax.
- the interpolated image generation unit 38 calculates a motion vector or parallax that each viewpoint image should have with respect to the right image or the left image based on the position of each viewpoint.
- the interpolation includes a process of interpolating values at the viewpoints inside the two viewpoints based on the values of the two viewpoints, and a process of extrapolating values at the viewpoints outside the two viewpoints based on the values of the two viewpoints. .
- the interpolation image generation unit 38 calculates the ratio between the difference between the viewpoint positions of the right image and the left image and the difference between the viewpoints of the right image and the other viewpoints between the right image and the left image.
- An interpolation vector or interpolation parallax obtained by multiplying the motion vector or parallax is calculated.
- the interpolation image generation unit 38 generates an image having an interpolation vector or interpolation parallax for the right image as an image for the other viewpoint.
- the interpolation image generation unit 38 can generate images for a plurality of viewpoints from the given right image and left image.
- the image evaluation unit 40 evaluates the right-eye image and the left-eye image generated by the interpolation image generation unit 38.
- evaluation refers to evaluation of whether or not an appropriate stereoscopic image can be provided by the right-eye image and the left-eye image.
- the image evaluation unit 40 may perform the evaluation based on the right image and the left image given to the interpolation image generation unit 38, and based on the right eye image and the left eye image generated by the interpolation image generation unit 38. Evaluation may be performed, and the evaluation may be performed based on parameters detected in the course of image processing in the interpolated image generation unit 38.
- the interpolated image generation unit 38 detects a plurality of corresponding points where the same subject is imaged in the given right image and left image, and calculates the motion vector of the entire image from the motion vector or parallax between the corresponding points. Alternatively, the parallax is estimated. For this reason, the larger the number of corresponding points detected by the interpolated image generation unit 38, the more accurately the motion vector or parallax of the entire image can be estimated.
- the interpolation image generation unit 38 may detect corresponding points by comparing edge components and the like of the right image and the left image. For this reason, it is not always possible to detect a sufficient number of corresponding points.
- the image evaluation unit 40 determines that the right eye image and the left eye image generated by the interpolation image generation unit 38 are appropriate. It may be determined that a simple stereoscopic image cannot be provided.
- the image evaluation unit 40 may evaluate the right eye image and the left eye image generated by the interpolation image generation unit 38 based on the distribution of corresponding points detected by the interpolation image generation unit 38. For example, the image evaluation unit 40 determines that the right eye image and the left eye image generated by the interpolation image generation unit 38 when the maximum value of the distance between the corresponding points is equal to or greater than a predetermined value, Assess that an appropriate stereoscopic image cannot be provided.
- the display unit 50 displays the right-eye image and the left-eye image generated by the multi-viewpoint image generation unit 14 when the evaluation result in the image evaluation unit 40 is equal to or lower than a predetermined level. Moreover, the display part 50 displays the image for right eyes and the image for left eyes which the interpolation image generation part 38 produced
- the multi-viewpoint image generation unit 14 and the interpolation image generation unit 38 may generate images in parallel.
- the multi-viewpoint image generation unit 14 may generate a right-eye image and a left-eye image when the evaluation result in the image evaluation unit 40 is equal to or lower than the level. That is, when it is evaluated that the right-eye image and the left-eye image generated by the interpolation image generation unit 38 can provide an appropriate stereoscopic image, the multi-viewpoint image generation unit 14 selects the right-eye image. And the image for the left eye may not be generated.
- the interpolation image generation unit 38 does not generate the right eye image and the left eye image when the evaluation based on the number or distribution of corresponding points in the right image and the left image is equal to or lower than a predetermined level. Good.
- the multi-viewpoint image generation unit 14 provides the display unit 50 with the right-eye image and the left-eye image for multiple viewpoints.
- the image evaluation unit 40 may control whether the multi-viewpoint image generation unit 14 and the interpolation image generation unit 38 generate the right-eye image and the left-eye image.
- the image evaluation unit 40 compares the maximum value of the parallax between the plurality of sets of right-eye images and left-eye images generated by the interpolation image generation unit 38 with a predetermined value, and determines the right You may evaluate the image for eyes, and the image for left eyes.
- the maximum value of the parallax is calculated by calculating the parallax of each corresponding point in the corresponding image for the right eye and the image for the left eye for each combination of the image for the right eye and the image for the left eye. Refers to the maximum value.
- the image evaluation unit 40 may evaluate that the right-eye image and the left-eye image cannot provide an appropriate stereoscopic image when the parallax maximum value is equal to or greater than a predetermined value. Further, the image evaluation unit 40 may receive information on the evaluation result by the user.
- the image acquisition unit 12 described with reference to FIGS. 1 to 12 may acquire a moving image including a plurality of images.
- the image processing unit 10 generates a plurality of left-eye images and right-eye images by performing the processing described in relation to FIGS. 1 to 12 for each frame image of the moving image. Since the image processing unit 10 can generate a plurality of left-eye images and right-eye images by a simple process, a plurality of images in each frame of the moving image can be obtained even when the moving image is distributed by streaming. The left-eye image and the right-eye image can be sequentially generated.
- the multi-viewpoint image generation unit 14 described with reference to FIGS. 1 to 12 uses the same shift amount between the left image and the right image, respectively, and the left-eye image and the right-eye image. Was generated.
- the multi-viewpoint image generation unit 14 may generate the left-eye image and the right-eye image using different shift amounts between the left image and the right image. That is, in the left-eye image and the right-eye image, the shift amount between the images corresponding to the left and right may be varied depending on the viewpoint position. Thereby, it is possible to display an image in which a sense of depth changes according to the viewpoint position.
Abstract
Description
特許文献1 特開平5-210181号公報
Claims (19)
- 複数組の右眼用画像および左眼用画像を、それぞれ対応する視点に向けて表示する画像表示装置であって、
予め定められた2視点に対応する右画像および左画像を受け取り、受け取った前記右画像および前記左画像の全体をそれぞれシフトすることで、複数の視点に対する前記右眼用画像および前記左眼用画像を生成する多視点画像生成部と、
前記多視点画像生成部が生成した前記右眼用画像および前記左眼用画像を、それぞれ対応する視点に向けて表示する表示部と
を備える画像表示装置。 - 前記多視点画像生成部は、異なる位置から撮像された2次元画像を、前記予め定められた2視点に対する前記右画像および前記左画像として取得する
請求項1に記載の画像表示装置。 - 前記多視点画像生成部は、前記左眼用画像および前記右眼用画像のシフト量の最大値が、前記予め定められた2視点に対する前記右画像および前記左画像の間の最大視差量より小さくなるように、前記左眼用画像および前記右眼用画像を生成する
請求項2に記載の画像表示装置。 - 与えられる2次元画像の全体をシフトすることで、前記予め定められた2視点に対する前記右画像および前記左画像を生成し、前記多視点画像生成部に入力する左右画像生成部を更に備える
請求項1に記載の画像表示装置。 - 前記左右画像生成部は、前記2次元画像の全体を予め定められた眼幅シフト量でシフトすることで、複数の視点のうちの隣接する2視点に対する前記右画像および前記左画像を生成し、
前記多視点画像生成部は、前記左眼用画像および前記右眼用画像のシフト量の最大値が、前記眼幅シフト量より小さくなるように、前記左眼用画像および前記右眼用画像を生成する
請求項4に記載の画像表示装置。 - 前記多視点画像生成部は、前記予め定められた2視点に対する前記右画像および前記左画像の全体を、非均一なシフト量で順次シフトした前記左眼用画像および前記右眼用画像を生成する
請求項1から5のいずれか1項に記載の画像表示装置。 - 前記多視点画像生成部は、利用者の位置に基づいて、それぞれの前記左眼用画像および前記右眼用画像のシフト量を変化させる
請求項6に記載の画像表示装置。 - 前記表示部は、
光を透過する透過部および光を遮蔽する遮蔽部が予め定められた配列パターンで配列されたバリア部と、
それぞれの前記左眼用画像および前記右眼用画像の、前記配列パターンに応じた領域を、前記バリア部に向けて表示する表示素子と
を有する請求項1から7のいずれか1項に記載の画像表示装置。 - 前記バリア部は、光を透過するか否かを制御するシャッタ素子がマトリクス状に形成され、それぞれの前記シャッタ素子に、光を透過させるか否かを制御することで前記配列パターンが変更でき、
前記表示素子は、それぞれの前記左眼用画像および前記右眼用画像について表示する領域の形状を、前記配列パターンの変更に応じて変更する
請求項8に記載の画像表示装置。 - 前記多視点画像生成部は、設定される視点数に応じて、それぞれの視点に対応する前記左眼用画像および前記右眼用画像を生成する
請求項1から9のいずれか1項に記載の画像表示装置。 - 画像に含まれる被写体に基づいて、前記多視点画像生成部に前記視点数を設定する被写体判定部を更に備える
請求項10に記載の画像表示装置。 - 画像に含まれる被写体の距離情報を取得して、取得した前記被写体の距離情報に応じて、前記多視点画像生成部に前記視点数を設定する距離取得部を更に備える
請求項10に記載の画像表示装置。 - 前記右画像および前記左画像における対応点の関係に基づいて、前記多視点画像生成部とは別に、前記複数の視点に対する前記右眼用画像および前記左眼用画像を生成する補間画像生成部と、
前記補間画像生成部により生成される前記右眼用画像および前記左眼用画像を評価する画像評価部と
を更に備え、
前記表示部は、前記画像評価部における評価結果が予め定められたレベル以下の場合に、前記多視点画像生成部が生成した前記右眼用画像および前記左眼用画像を表示する
請求項1から12のいずれかに記載の画像表示装置。 - 前記多視点画像生成部は、前記画像評価部における評価結果が前記予め定められたレベル以下の場合に、前記右眼用画像および前記左眼用画像を生成する
請求項13に記載の画像表示装置。 - 前記補間画像生成部は、前記右画像および前記左画像において同一の被写体が撮像された前記対応点を複数検出し、それぞれの前記対応点に基づいて、前記複数の視点に対する前記右眼用画像および前記左眼用画像を生成し、
前記画像評価部は、前記補間画像生成部が検出した前記対応点の数に基づいて、前記補間画像生成部により生成される前記右眼用画像および前記左眼用画像を評価する
請求項13または14に記載の画像表示装置。 - 前記補間画像生成部は、前記右画像および前記左画像において同一の被写体が撮像された前記対応点を複数検出し、それぞれの前記対応点に基づいて、前記複数の視点に対する前記右眼用画像および前記左眼用画像を生成し、
前記画像評価部は、前記補間画像生成部が検出した前記対応点の分布に基づいて、前記補間画像生成部により生成される前記右眼用画像および前記左眼用画像を評価する
請求項13または14に記載の画像表示装置。 - 前記補間画像生成部は、前記画像評価部における評価結果が前記予め定められたレベル以下の場合には、前記右眼用画像および前記左眼用画像を生成しない
請求項15または16に記載の画像表示装置。 - 前記画像評価部は、前記補間画像生成部が生成した複数組の前記右眼用画像および前記左眼用画像の間の視差の最大値と、予め定められた値とを比較して、前記補間画像生成部が生成した前記右眼用画像および前記左眼用画像を評価する
請求項13または14に記載の画像表示装置。 - 複数組の右眼用画像および左眼用画像を、それぞれ対応する視点に向けて表示する画像表示方法であって、
予め定められた2視点に対する右画像および左画像を受け取り、受け取った前記右画像および前記左画像の全体をそれぞれシフトすることで、複数の視点に対する前記左眼用画像および前記右眼用画像を生成する多視点画像生成段階と、
前記多視点画像生成段階で生成した前記左眼用画像および前記右眼用画像を、それぞれ対応する視点に向けて表示する表示段階と
を備える画像表示方法。
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