JP5720561B2 - Image processing apparatus, image processing method, and image processing program - Google Patents

Description

The present invention relates to an image processing apparatus , an image processing method, and an image processing program , and more specifically, an image that can reduce the burden on an observer when outputting image data in which 2D image data and 3D image data are mixed. The present invention relates to a processing device , an image processing method, and an image processing program .

  In recent years, two images having a parallax in the horizontal direction are displayed on the same display as a left-eye image and a right-eye image, and an observer uses the left-eye image as the left eye and the right-eye image as the right eye. Development of technologies relating to 3D images that can be perceived as if the images displayed on the display exist three-dimensionally by observing them independently has been actively conducted.

  As a 3D image display and observation method, a left-eye image and a right-eye image having linearly polarized light that are orthogonal to each other are displayed on the same display, and each image is displayed by an observer using glasses with a polarization filter. A method of independently observing the image with the left and right eyes is well known.

  In addition, the left-eye image and the right-eye image are alternately displayed on the display, and the viewer uses the glasses with liquid crystal shutters that alternately shield the left and right fields of view to make each image independent with the left and right eyes. The observation method is well known.

  In these 3D image technologies, it is perceived as if the subject image is projected forward from the display surface when viewed by the observer, or how far the subject image is viewed from the display surface when viewed from the viewer. The parallax in the horizontal direction between the subject image in the left-eye image and the subject image in the right-eye image (hereinafter sometimes simply referred to as “parallax”). .)

  Hereinafter, as described above, an image having a stereoscopic visual effect that is perceived as if the subject image is popped out or pulled back due to the parallax between the left eye image and the right eye image. In contrast to a 3D image, an image without such a three-dimensional visual effect is called a 2D image.

  Here, when image content in which 2D images and 3D images are mixed is sequentially reproduced and displayed on a display or the like, the 3D image is displayed immediately after the displayed image is switched from the 2D image to the 3D image. If there is an image in the image that is perceived as being projected too far from the viewer, or an image that is perceived as being pulled in too much, there is a problem that the viewer may be burdened.

  Until then, 3D images that are used to observation of 2D images and perceived by popping out excessively when the observer is not used to viewing 3D images, or 3D images that are perceived by being drawn too much, that is, a stereoscopic effect. This is because if an image that is too strong is displayed, the observer's eyes may be burdened.

  As means for solving the above problem, for example, in Patent Document 1, when switching from a channel that broadcasts a 2D image to a channel that broadcasts a 3D image, an image for the left eye that configures the 3D image and There is described a stereoscopic video display device that suppresses a sudden change and realizes natural switching by controlling the amount of parallax with the right-eye image to increase sequentially over time. .

  Further, in Patent Document 2, when an image in which 2D images and 3D images are mixed is sequentially input and reproduced, and it is determined that the input image is a 2D image, the input 2D image is displayed. Generate and display multiple parallax images that are uniformly shifted in the left-right direction by a predetermined amount of parallax, and reproduce only images that have a three-dimensional visual effect to reduce observer fatigue. A three-dimensional image display device is described.

JP-A-11-164328 JP 2010-183267 A

  However, in the stereoscopic image display device described in Patent Literature 1, when the 2D image is switched to the 3D image, the parallax amount of the original 3D image is increased by increasing the parallax amount of the 3D image over a predetermined time. It has returned to. Therefore, for example, when the parallax amount of the original 3D image after switching changes so as to decrease over a predetermined time, the change in the parallax magnitude between the original 3D image and the controlled 3D image changes. Depending on how the parallax amount of the original 3D image changes, such as the reverse, there is a problem that the displayed 3D image becomes uncomfortable.

  In the 3D image display device described in Patent Document 2, since all images that should be reproduced as 2D images are converted into pseudo 3D images, the observer converts all 2D images as 3D images. There is a problem that can only be observed.

Therefore, the present invention detects a switching point from 2D image data to 3D image data when outputting image data in which 2D image data and 3D image data are mixed, and performs predetermined 2D before the switching point. An image processing apparatus , an image processing method, and an image that can reduce the burden of the observer by making the observer accustomed to observing the 3D image by converting the image data into 3D image data that increases toward the point where the parallax is switched. An object is to provide a processing program .

In the data, a switching point detection unit (201) for detecting a switching point at which the image data switches from 2D image data to 3D image data, and a predetermined point after the switching point detected by the switching point detection unit (201). The parallax amount deriving unit (202) for deriving the parallax amount between the left-eye image data and the right-eye image data in the 3D image data, and the parallax amount derived by the parallax amount deriving unit (202) has a predetermined value. When the parallax amount determination unit (203) for determining whether or not the parallax amount exceeds the predetermined value when the parallax amount determination unit (203) determines that the parallax amount derived by the parallax amount derivation unit exceeds a predetermined value An image conversion unit (103) that converts predetermined 2D image data before the switching point detected by the switching point detection unit (201) into 3D image data in which the amount of parallax increases toward the switching point; The And, wherein the parallax amount determination unit (203) is the parallax amount deriving unit image area corresponding to the image regions in the 3D image data derived parallax amount is determined to exceed the predetermined value (202), the switching An area specifying unit (205) for specifying from 2D image data of a predetermined time before the switching point detected by the point detecting unit (201) is further provided, and the image converting unit (103) is configured to include the area specifying unit (205). The image processing apparatus (1) is characterized in that the subject image data included in the image area in the 2D image data specified by is converted to 3D image data in which the parallax amount increases toward the switching point .

  In the image processing apparatus (1), the image conversion unit (103) converts the 2D image data from the switching point detected by the switching point detection unit (201) to a predetermined time before the switching point of the parallax amount. Alternatively, it may be converted into 3D image data that increases toward.

In order to solve the above problems, the present invention further provides switching point detection for detecting a switching point at which the image data is switched from 2D image data to 3D image data in image data in which 2D image data and 3D image data are mixed. A parallax amount derivation step for deriving a parallax amount between a left-eye image and a right-eye image in predetermined 3D image data after the switching point detected in the switching point detection step; and the parallax amount In the parallax amount determining step for determining whether or not the parallax amount derived in the deriving step exceeds a predetermined value, and in the parallax amount determining step, the parallax amount derived in the parallax amount deriving step exceeds a predetermined value When it is determined that the predetermined 2D image data before the switching point detected in the switching point detection step is detected, the parallax amount is switched. 3D image data Ri Do from the image conversion step of converting the 3D image data increases toward the point, the derived parallax amount of the parallax amount determination step parallax amount deriving step is determined to exceed the predetermined value A region specifying step of specifying an image region corresponding to the image region from 2D image data of a predetermined time before the switching point detected by the switching point detecting step, and the image converting step includes the region specifying step The image processing method is characterized in that the subject image data included in the image area in the 2D image data specified by is converted to 3D image data in which the amount of parallax increases toward the switching point .
In order to solve the above problems, the present invention further provides switching point detection for detecting a switching point at which the image data is switched from 2D image data to 3D image data in image data in which 2D image data and 3D image data are mixed. A parallax amount derivation step for deriving a parallax amount between a left-eye image and a right-eye image in predetermined 3D image data after the switching point detected in the switching point detection step; and the parallax amount In the parallax amount determining step for determining whether or not the parallax amount derived in the deriving step exceeds a predetermined value, and in the parallax amount determining step, the parallax amount derived in the parallax amount deriving step exceeds a predetermined value When it is determined that the predetermined 2D image data before the switching point detected in the switching point detection step is detected, the parallax amount is switched. 3D in which the computer performs an image conversion step of converting into 3D image data that increases toward a point, and the parallax amount determination step determines that the parallax amount derived by the parallax amount derivation step exceeds a predetermined value The image conversion step further causes the second computer to execute an area specifying step for specifying an image area corresponding to the image area in the image data from the 2D image data for a predetermined time before the switching point detected by the switching point detecting step. Has the computer execute conversion of the subject image data included in the image area in the 2D image data specified by the area specifying step into 3D image data in which the amount of parallax increases toward the switching point. An image processing program is provided.

1 is a block diagram showing a schematic internal configuration of an image processing apparatus 1 according to an embodiment of the present invention. 6 is a conceptual diagram for explaining derivation of parallax amounts of a left-eye image and a right-eye image by a parallax amount deriving unit 202 of the image processing apparatus 1. FIG. It is a conceptual diagram which shows the relationship between the parallax between the photographic subject image in the image for left eyes, and the photographic subject image in the image for right eyes, and the projection of the photographic subject image to the front or the drawing back. It is a schematic diagram of the basic depth model used when the image conversion part 103 of the image processing apparatus 1 converts 2D image data into 3D image data. 4 is a flowchart for explaining image processing performed by the image processing apparatus 1 according to an embodiment of the present invention. 3 is a conceptual diagram of image data temporarily stored in a temporary storage unit 102 of the image processing apparatus 1. FIG. It is a schematic diagram of a mode that the image displayed switches from 2D image to 3D image. It is a conceptual diagram for demonstrating the image process in which the image conversion part 103 of the image processing apparatus 1 converts the whole 2D image for the predetermined time before a switching point into a 3D image. FIG. 5 is a conceptual diagram for explaining image processing in which the image conversion unit 103 of the image processing apparatus 1 converts a subject image in a 2D image for a predetermined time before a switching point specified by the subject specifying unit 204 into a 3D image. is there.

According to the image processing apparatus, the image processing method, and the image processing program of the present invention, when outputting image data in which 2D image data and 3D image data are mixed, the switching point from 2D image data to 3D image data is output. Is detected, and the predetermined 2D image data before the switching point is converted into 3D image data that increases toward the switching point, thereby reducing the burden on the observer. Can be made.
Exemplary embodiments of an image processing apparatus and an image processing method according to the present invention will be described below with reference to the drawings. Specific numerical values and the like shown in the embodiment are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(Image processing apparatus 1)
The image processing apparatus 1 according to the present embodiment can output image data in which 2D image data and 3D image data are mixed. When outputting the mixed image data, the image processing apparatus 1 converts 2D image data to 3D image data. A switching point can be detected, and predetermined 2D image data before the switching point can be converted into 3D image data in which the parallax increases toward the switching point. Hereinafter, the image processing apparatus 1 will be described in detail.

  FIG. 1 is a block diagram illustrating a schematic internal configuration of the image processing apparatus 1. In FIG. 1, the processing signal is indicated by a solid line and the data flow is indicated by a broken line.

  As shown in FIG. 1, the image processing apparatus 1 includes an image data input unit 101, a temporary storage unit 102, an image conversion unit 103, an image data output unit 104, an operation unit 110, and a central control unit 200. .

  The central control unit 200 includes a semiconductor integrated circuit including a CPU (Central Processing Unit), a ROM (Read Only Memory) in which various programs are stored, a RAM (Random Access Memory) as a work area, and the like. Input / output processing, detection processing of switching points from 2D image data to 3D image data, derivation and determination processing of 3D image parallax, conversion processing of 2D image data into 3D image data, etc. .

  The operation unit 110 includes a power switch, an operation key, a cross key, a joystick, and the like, and accepts a user operation input. The operation unit 110 may be provided in the main body of the 3D image processing apparatus, or a remote controller that performs infrared communication with the main body.

  The image data input unit 101 receives 2D image data and 3D images from various recording media such as DVD, BD (Blu-ray Disc) or flash memory, a digital TV tuner, or an external imaging device (digital camera), for example. Image data with mixed data is input.

  The image data input unit 101 includes, for example, an HDMI (High-Definition Multimedia Interface) terminal, a USB (Universal Serial Bus) terminal, various input terminals conforming to the IEEE 1394 standard, and the like.

  The image data input to the image data input unit 101 is a scene (scene) for specifying at least a switching point from 2D image data to 3D image data (hereinafter simply referred to as “switching point”). Includes control information that is information indicating whether the scene is a 2D image scene or a 3D image scene.

  The image data input to the image data input unit 101 is sent to the temporary storage unit 102 and temporarily stored in the temporary storage unit 102. The temporary storage unit 102 is configured by a storage medium such as an EEPROM (Erasable Programmable Read Only Memory), an EEPROM (Electrically Erasable PROM), a nonvolatile RAM, a flash memory, or an HDD (Hard Disk Drive).

  The image data temporarily stored in the temporary storage unit 102 is an image in which the image conversion unit 103 converts predetermined 2D image data before a switching point, which will be described later, into 3D image data that increases toward the switching point. When the process is performed, the image data output unit 104 performs a predetermined decoding process as the 3D image data subjected to the process, or as the 2D image data or 3D image data temporarily stored when the image process is not performed. Is output.

  Similar to the image data input unit 101, the image data output unit 104 includes an HDMI (High-Definition Multimedia Interface) terminal, a USB (Universal Serial Bus) terminal, various output terminals conforming to the IEEE 1394 standard, and the like.

  The central control unit 200 also includes a switching point detection unit 201 that detects a switching point from 2D image data to 3D image data, a parallax amount deriving unit 202 that derives a parallax amount of 3D image data, and a derived parallax amount Functions as a parallax amount determination unit 203 that determines whether or not the image size exceeds a predetermined size, a subject specification unit 204 that specifies a subject in the image, and a region specification unit 205 that specifies a predetermined region in the image. The function of each part will be described below.

  The switching point detection unit 201 detects, from the image data temporarily stored in the temporary storage unit 102, a time point when the image data to be output is switched from 2D image data to 3D image data as a switching point.

  As described above, the image data includes control information indicating whether each scene is a 2D image scene or a 3D image scene. Based on this control information, the switching point detector 201 detects a time point when the image data is switched from 2D image data to 3D image data as a switching point.

  The switching point detection unit 201 also detects a switching point at which the 2D image data is switched to the 3D image data from the difference in data structure between the 2D image data and the 3D image data when the image data does not have the control information. You can also.

  The parallax amount deriving unit 202 derives the parallax amount between the left-eye image and the right-eye image in the 3D image data.

  Various known methods can be adopted for deriving the parallax amount by the parallax amount deriving unit 202. For example, the parallax amount deriving unit 202 performs pattern matching on the frame of the left eye image and the frame of the right eye image. Execute to derive the amount of parallax between both frames. Here, the frame refers to still image data arranged in time series constituting the image data of the left-eye image data and the right-eye image data.

  Derivation of the parallax amount based on pattern matching by the parallax amount deriving unit 202 will be described with reference to FIG. FIG. 2 is a conceptual diagram for explaining the derivation of the parallax amount of the image for the left eye and the image for the right eye by the parallax amount derivation unit 202 of the imaging device 1.

  The parallax amount deriving unit 202 divides one of the two frames of the left-eye image frame and the right-eye image frame into blocks having a predetermined size. In FIG. 2A, a frame L200 of a left-eye image of 1,920 pixels × 1,080 pixels is divided into a total of 64 blocks of a block L201 of 240 pixels × 135 pixels.

  For each block of the divided image frame, the parallax amount deriving unit 202 extracts a block having the same size and a high correlation value from the other image frame. In FIG. 2B, R202 is extracted from the frame of the right-eye image as a block having the same size and high correlation value as the block L202 in FIG. 2A (the block indicated by hatching in the drawing). Yes.

  The disparity amount deriving unit 202 calculates a difference vector (hereinafter referred to as “disparity vector”) from the positional relationship between the block of the frame of the divided image and the block of the frame of the other image corresponding to the block. . In FIG. 2, the disparity vector 203 is calculated from the block L202 in the left-eye image L200 and the corresponding block R202 in the right-eye image.

  As a pattern matching method as described above, for example, an SAD (Sum of Absolute Difference) that takes a difference in luminance value, an SSD (Sum of Squared Intensity Difference) that uses the difference squared, or a luminance value of each pixel. Various existing methods such as NCC (Normalized Cross Correlation) that takes the similarity of the variance value obtained by subtracting the average value can be employed.

  Here, since the calculated disparity vector is generated only in the horizontal direction in principle, the direction can be simply represented by a positive or negative sign (+ or −). Here, the direction of the parallax vector when the subject image is perceived to be projected forward from the display surface when viewed from the observer is positive (+), and the subject image is viewed from the viewer with respect to the display surface. The direction of the disparity vector when it is perceived as if it is pulled backward is negative (−).

  As described above, the parallax amount deriving unit 202 calculates a parallax vector from a plurality of blocks obtained by dividing an image frame into a grid pattern. Further, the parallax amount deriving unit 202 identifies object (subject image) data from each image from data relating to the spatial frequency of the left-eye image data and the right-eye image data, and calculates a parallax vector for each identified object. To do.

  Further, the parallax amount deriving unit 202 specifies an object from the spatial frequency or the like of the image data for the left eye and the image data for the right eye, and calculates the disparity vector by directly performing pattern matching for each specified object. Also good.

  The parallax amount deriving unit 202 derives the magnitude of the parallax vector calculated as described above as the parallax amount between the left-eye image and the right-eye image.

Returning to FIG. 1, the parallax amount determination unit 203 determines whether or not the parallax amount between the right-eye image and the left-eye image in the 3D image exceeds a predetermined size.
First, referring to FIG. 3, the parallax between the subject image in the left-eye image and the subject image in the right-eye image displayed on the display surface such as a display, The degree of pull-in will be described. FIG. 3 is a conceptual diagram showing the relationship between the parallax between the subject image in the left-eye image and the subject image in the right-eye image, and the projection of the subject image to the display surface or the forward pull-in. It is.

  3, the display surface of the external display device or the like that displays the left-eye image data and the right-eye image data output from the image data output unit 104 is DP30, the left eye of the observer is LE30, and the right side of the observer Assume that the eye is RE30 and the distance between the observer and the display surface DP30 is D.

(When perceived as jumping forward)
In FIG. 3A, when the position of the subject image in the image for the left eye on the display surface DP30 is L _f and the position of the subject image in the image for the right eye is R _f , the observer is L with the left eye LE30. _f , When R _f is observed with the right eye RE30, the subject image is formed at the position of P _f . As a result, the viewer perceives the subject image as if it jumps forward with respect to the display surface DP30.

Here, the distance of the observer's left eye LE30 and right eye RE 30 E, the amount of parallax of the image L _f and R _f and V _f, the distance Z _f from the display surface DP30 to the imaging position following formula ( 1) As follows.

(E + V _f ) Z _f = D · V _f (1)

Here, the observer perceives the subject image at a position P _f different from the display surface D30. On the other hand, the eyes of the observer are in focus on the display surface DP30. Therefore, if the difference between the two is large, there is a risk of giving a burden to the eyes of the observer or causing discomfort to the observer.

  A distance E between the left eye LE30 and the right eye RE30 of the observer is 6.5 cm which is a general human pupil distance, and a viewing distance D from the observer to the display surface DP30 is a standard viewing distance. As the parallax amount between the left eye image and the right eye image that can be comfortably recognized as a 3D image without imposing a burden on the observer's eyes, It has been reported that it is desirable to make the short side (width) 2.9% or less (about 1 degree in parallax angle) ("3DC safety guidelines for 3D dissemination that is kind to humans") 3D Consortium Safety Guidelines Committee (Revised on April 20, 2010).

Therefore, the parallax amount determination unit 203 determines that the parallax amount of the parallax vector in the forward projection direction, that is, in the positive direction, when the V _f exceeds the threshold value VS _f expressed by the following equation (2), It is determined that the size is likely to put a burden on the eyes.

VS _f = 0.029 × DW (2)

Here, as the width DW of the display surface, the size of the width of an external monitor such as a TV display owned by the user is input from the operation unit 110, and the value of the size is adopted. Further, by adjusting the value and the threshold value VS _f in advance from the operation unit 110, the value may be further changed as a favorite value.

(When perceived as if it is on the display surface)
In FIG. 3B, when the position of the subject in the left-eye image on the display surface DP30 and the position of the subject in the right-eye image are the same, the subject image is _Pc on the display surface D30. The image is formed at the position. As a result, the viewer perceives the subject image as if it is on the display surface DP30.

(When perceived as if pulling backward)
In FIG. 3C, when the position of the subject image in the left-eye image on the display surface DP30 is L _b and the position of the subject image in the right-eye image is R _b , the observer uses the left eye LE30 to set L _b, when observing the R _b in the right eye RE 30, subject imaged at the position of P _b. As a result, the observer perceives the subject image as if it was drawn backward with respect to the display surface DP30.

Here, the distance of the observer's left eye LE30 and right eye RE 30 E, the amount of parallax of the image L _b and R _b and V _b, the distance Z _b from the display surface DP30 to the imaging position to the following formula ( 3) As follows.

(E−V _b ) Z _b = D · V _b (3)

Here, whether the subject image even if it is perceived as if by drawing the rear, the viewer will perceive a different position P _b is a display surface D30 of the subject image is jumping out forward It is the same as the case where it is perceived. Therefore, similarly to the case where it is perceived as if it is jumping out forward, there is a risk that the observer's eyes may be burdened or the viewer may feel uncomfortable.

Therefore, the parallax amount determination unit 203 determines that the parallax of the parallax vector in the backward pull-in direction, that is, in the negative direction is the observer's disparity when V _b exceeds the threshold value VS _b represented by the following equation (4). It is determined that the size is likely to put a strain on the eyes.

VS _b = 0.029 × DW (4)

Here, the width DW of the display surface is inputted from the operation unit 110 as the width of an external monitor such as a TV display owned by the user, and the value of the size is adopted as the front It is the same as when it is perceived as if it is jumping out. The user uses the operation unit 110 in advance may be allowed to be changed as a further preference value by adjusting the value or the threshold VS _b, if they pop out the value to the forward Thus, it may be set to a value different from the case where it is perceived.

  In addition, in a 3D image that is perceived as if it is drawn backward from the display surface, it is desired that the horizontal parallax on the display surface should not exceed 5 cm. 3DC Safety Guidelines for 3D Dissemination ”Published by 3D Consortium Safety Guidelines Committee, revised April 20, 2010). Since both eyes of a person do not open outward, observing a subject that is more than the pupil distance between both eyes independently with the left eye and the right eye may put a greater burden on the eyes of the observer. Because there is.

Therefore, VS _b derived by the above equation (4) may be set to 5 cm. The determination whether VS _b is 5 cm or more and the setting to 5 cm are performed by calculating the number of pixels corresponding to 5 cm from the DW value set or input in advance.

  As described above, the parallax amount determination unit 203 sets the predetermined amount of parallax between the left-eye image and the right-eye image in the 3D image that may put a burden on the observer's eyes. Judgment is made whether or not it exceeds.

  Here, the parallax amount determination unit 203 determines the amount of parallax derived with respect to the 3D image data at that time when the switching point detection unit 201 detects the switching point from the 2D image data to the 3D image data. Alternatively, the determination of the amount of parallax derived for the 3D image data from the switching point to a predetermined time point (for example, a time point after 3 seconds) can be continued.

  Returning to FIG. 1, when it is determined that the derived amount of parallax exceeds a predetermined size, the image conversion unit 103 switches the predetermined 2D image data before the switching point to the switching point of the parallax amount. A process of converting into 3D image data that increases toward is performed. This processing by the image conversion unit 103 will be described below.

  The image conversion unit 103 performs image projection and image extraction based on a plurality of pre-recorded image models having a sense of depth (hereinafter referred to as “basic depth model”) and high frequency components of the luminance signal of 2D image data. Depth estimation data regarding pull-in is generated, image data for the left eye and image data for the right eye are generated from the 2D image data based on the depth estimation data, and the 2D image data is converted into 3D image data.

  As the basic depth model, the three models illustrated in FIG. 4 are recorded in the ROM of the central control unit 200 or the recording unit (not shown) of the image processing apparatus 1. The basic depth model a shown in FIG. 4A is a depth model with a spherical concave surface. The basic depth model b shown in FIG. 4B is a model in which the upper part of the basic depth model a is replaced with an arched cylindrical surface instead of a spherical shape, and the upper part is a cylindrical surface and the lower part is a concave surface. The basic depth model c shown in FIG. 4 (c) has a cylindrical surface shape in which the upper part is a plane, the lower part is continuous from the plane, and toward the near side as it goes down. The upper part is a plane and the lower part is a cylindrical surface. It is a model.

  The image conversion unit 103 calculates a high frequency component of the luminance signal of 2D image data. Then, a synthesis ratio of the three types of basic depth models is determined from the calculated values, and depth estimation data is generated from the synthesis ratio.

  Next, the image conversion unit 103 generates 2D image data of a viewpoint (for the left eye or for the right eye) different from the original 2D image data based on the depth estimation data. That is, based on the depth estimation data, the texture of the original 2D image is shifted and arranged in the left direction or the right direction, and a new 2D image having parallax with respect to the original 2D image is generated. Then, the image data relating to the new 2D image is set as 2D image data of another viewpoint.

  By using the original 2D image data and the newly generated 2D image data of another viewpoint as image data for left eye or image data for right eye, 2D image data can be converted into a 3D image.

  Here, the image conversion unit 103 can shift the texture of the entire 2D image based on the depth estimation data, or can shift only the texture of a specific subject image based on the depth estimation data.

  In addition to the above method, the image conversion unit 103 may simply shift the original 2D image in the right direction or the left direction to generate 2D image data of another viewpoint. The above-described method for converting 2D image data into 3D image data is merely an example, and other known methods may be employed.

  At this time, the image conversion unit 103 does not immediately convert the original 2D image data into a 3D image having a parallax amount based on the depth estimation data at that time, but newly generated 2D image data of another viewpoint. The arrangement of shifting the texture of the original 2D image in the left direction or the right direction is sequentially performed so that the amount of parallax between the two reaches the magnitude of the parallax amount of the depth estimation data over a predetermined time.

  By doing as described above, the image conversion unit 103 starts from a time point (for example, a point 3 seconds before) a predetermined time after the switching point detection unit 201 detects the switching point to immediately before the switching point. The amount of parallax between the original 2D image data and the newly generated 2D image data of another viewpoint gradually increases, and arrives at the 3D image having the parallax based on the depth estimation data immediately before the switching point. Can be converted sequentially.

  Here, when the image conversion unit 103 performs the above-described conversion process, only the subject image specified by the subject specifying unit 204 or the subject image included in the specific image region specified by the region specifying unit 205 is subjected to the parallax amount. Can be gradually increased. The functions of the subject specifying unit 204 and the region specifying unit 205 in FIG. 1 will be described below.

  The subject specifying unit 204 specifies a subject image that gradually increases the parallax amount from among the subject images in the 2D image that the image conversion unit 103 converts into a 3D image.

  The subject specifying unit 204 first compares the 2D image data immediately before or a predetermined time before the switching point detected by the switching point detection unit 201 and the 3D image data after the switching point or a predetermined time, and the same for both. When there is subject image data, the subject image data is specified from the 2D image data.

  This identification is performed based on a known subject recognition technique. For example, the feature value of the face image data of the subject in the 2D image data and the feature value of the face image data of the subject in the 3D image data are calculated and compared by a known technique such as face detection. If these feature values are within a predetermined similar range, the same person is the subject in the 2D image data immediately before or at a predetermined time before the switching point and at the switching point or 3D image data after the predetermined time. Assuming that the image exists as an image, the image data of the person is specified from the 2D image data.

  If the subject image data in the 3D image data corresponding to the specified subject image data is determined by the parallax amount determination unit 203 to exceed the predetermined amount of parallax, the subject specifying unit 204 is extracted. The subject image related to the subject image data is specified as a target for gradually increasing the parallax amount.

  The image conversion unit 103 performs conversion from the above-described 2D image data to 3D image data so that the specified subject image has a predetermined amount of parallax over a predetermined time.

  If a specific subject image is perceived as an image that is excessively popping out or drawn in at the timing immediately after switching from 2D image data to 3D image data, there is a possibility that it becomes a burden on the observer. When the subject specifying unit 204 performs the above-described subject specifying processing, the same subject image as the possible subject image should be displayed in 2D, and gradually toward the switching point. It can be popped out or pulled in, and the burden on the observer can be reduced by getting used to the observer.

  The area specifying unit 204 specifies an image area including a subject image that gradually increases the amount of parallax from the 2D images that the image conversion unit 103 converts into 3D images.

  The area specifying unit 204 is determined by the parallax amount determination unit 203 to exceed the predetermined amount of parallax immediately after the switching point detected by the switching point detection unit 201 or from the 3D image data for a predetermined time. An image area having a specified amount of parallax is identified.

  Then, the region corresponding to the identified region on the display coordinates (position) is identified from the 2D image data for a predetermined time before the switching point, and the subject image included in the region is gradually increased in parallax amount. Specify as the target to increase.

  The image conversion unit 103 performs the conversion from the 2D image data to the 3D image data so that the subject image included in the image region specified in the 2D image has a predetermined amount of parallax over a predetermined time. .

  If an image in a specific area is perceived as an image that is excessively popping out or pulled in immediately after switching from 2D image data to 3D image data, there is a possibility of burdening the viewer. The area specifying unit 205 performs the above-described area specifying process to display a display area corresponding to such a display area when switching to the 3D image at the stage where the 2D image should be displayed. The included subject image can be gradually jumped out or drawn toward the switching point, and the burden on the observer can be reduced by getting used to the observer.

(Image processing)
Next, when outputting image data in which 2D image data and 3D image data are mixed by the image processing apparatus 1 according to the present embodiment, a switching point from 2D image data to 3D image data is detected and switched. Image processing for converting predetermined 2D image data before a point to 3D image data that increases toward the point when the parallax is switched will be described.

  FIG. 5 is a flowchart for explaining image processing according to the embodiment of the present invention performed by the image processing apparatus 1.

  In accordance with the operation of the operation unit 110, image data in which 2D image data and 3D image data are mixed is sequentially input to the image data input unit 101 from various recording media, a digital television tuner, an imaging device, or the like (step S101). ).

  When image data is input to the image data input unit 101, the temporary storage unit 102 sequentially stores the image data in sequence (step S102). FIG. 6 shows a conceptual diagram of image data temporarily stored in the temporary storage unit 102.

  FIG. 6 shows 2D image data D601 until time t1, 3D image data D602 after time t1 and until time t2, 2D image data D603 after time t2 and until time t3, and 3D image data D604 after time t3. FIG. 2 shows a state temporarily stored in the temporary storage unit 102. As described above, the temporary storage unit 102 sequentially and temporarily stores images in which 2D image data and 3D image data are mixed.

  Returning to FIG. 5, when the image data is temporarily stored in step S <b> 102, the switching point detection unit 201 detects a time point when the temporarily stored image data is switched from 2D image data to 3D image data as a switching point. (Step S103).

  The switching point detection unit 201 detects a switching point from control information indicating whether each scene is a 2D image scene or a 3D image scene included in the image data. Alternatively, the switching point is detected from the difference in data structure between 2D image data and 3D image data.

  In FIG. 6, a time point t1 at which the 2D image data D601 is switched to the 3D image data D602 is detected as a switching point P1. Similarly, a time point t3 when the 2D image data D603 is switched to the 3D image data 604 is detected as a switching point P2.

  When the switching point detection unit 201 does not detect a switching point from 2D image data to 3D image data (NO in step S103), the image processing apparatus 1 does not perform the subsequent processing.

  When the switching point detection unit 201 detects a switching point from 2D image data to 3D image data (YES in step S103), the parallax amount deriving unit 202 is for a predetermined time at or after the switching point. The amount of parallax between the left-eye image and the right-eye image in the 3D image data is derived (step S104). The parallax amount is derived by a method using template matching or the like as described above.

  In FIG. 6, the parallax amount deriving unit 202 derives the parallax amount of the 3D image data D602 at the time point t1 or between the time point t1 and a predetermined time later (for example, 5 seconds). Similarly, the parallax amount deriving unit 202 derives the parallax amount of the 3D image data D604 at t3 or between t3 and a predetermined time.

  When the parallax amount deriving unit 202 derives the parallax amount in step S104 of FIG. 5, the parallax amount determining unit 203 determines whether or not the derived parallax amount exceeds a predetermined size (step S105). .

  If a 3D image displayed immediately after the switching point or within a predetermined time from the switching point includes a subject image having a large amount of parallax that may impose a burden on the observer, When the 3D image is displayed, there is a possibility that a burden may be placed on an observer who has been observing the 2D image until then and is not accustomed to observing the 3D image.

  FIG. 7 shows a schematic diagram of how the displayed image is switched from a 2D image to a 3D image. In FIG. 7, the left eye of the observer is LE30 and the right eye is RE30.

  FIG. 7A schematically shows a state in which D71 as a 2D image is displayed until time t1, and the left-eye image LD71 and right-eye image RD71 are displayed as 3D images at time t1.

Here, the observer perceives the subject image G71 as a 2D image in the display image D71 until time t1. However, at time t1, the image is switched to a 3D image, and based on the parallax between the left-eye image LD71 and the right-eye image RD71, the subject image TG71 jumps out of the display surface by Z _f 701 and is perceived.

When the amount of parallax related to the pop-out size Z _f 701 of the subject image TG71 exceeds the threshold value VS _f described above, there is a possibility of placing a burden on the eyes of an observer who has not yet perceived a 3D image.

At this time, the parallax amount determination unit 203 may exceed the predetermined threshold VS _f between the left-eye image and the right-eye image at the time point t1 when switching to the 3D image, that is, may impose a burden on the observer. It is determined that there is a certain amount of parallax.

  In FIG. 7B, D72 which is a 2D image is displayed until time t3, left eye image LD72 and right eye image RD72 are displayed as 3D images at time t3, and after a predetermined time Δt from time t3, A state in which the left-eye images LD73 and RD73 are displayed as 3D images is schematically shown.

Here, the observer perceives the subject image G72 as a 2D image in the display image D72 until time t3. At time t3, the image is switched to a 3D image, and it is perceived that the subject image TG72 is projected from the display surface by Z _f 702 based on the parallax between the left-eye image LD72 and the right-eye image RD72.

At the time point t3 that is the switching point, when the parallax amount related to the pop-out size Z _f 702 of the subject image TG72 is below the threshold value VS _f described above, the parallax amount determination unit 203 and the left-eye image LD72 It is not determined that there is a parallax amount that may impose a burden on the viewer between the right-eye image RD72.

On the other hand, the subject image TG73 appears to protrude by Z _f 703 larger than Z _f 702 between the left-eye image LD73 and the right-eye image RD73 that are displayed after Δt has elapsed from time t3. Perceived.

When the parallax amount related to the pop-out size Z _f 703 of the subject image TG73 exceeds the threshold value VS _f described above, the parallax amount determination unit 203 indicates that there is a parallax amount that may impose a burden on the observer. Make a decision.

At the time when the 2D image is switched to the 3D image, even if an image having a parallax amount that may impose a burden on the observer is not included, the observer who has observed the 2D image until then has changed the 3D image. This is because _if a subject image that exceeds the threshold value VS _f described above is displayed before getting used to perception, it may put a burden on the eyes of the observer.

  It should be noted that the parallax amount determination unit 203 has a parallax amount of a size that may cause a burden on the observer in a 3D image displayed immediately after the switching point or within a predetermined time from the switching point. If it is not determined that an image is included (NO in S105), the image processing apparatus 1 does not perform the subsequent processing.

  Returning to FIG. 5, when the parallax amount determination unit 203 determines in step S105 that the parallax amount between the left-eye image and the right-eye image exceeds a predetermined value (YES in step S105), the image conversion unit. Reference numeral 103 denotes 2D image data from the time point a predetermined time before the switching point to the switching point in the image data temporarily stored in the temporary storage unit, and the amount of parallax increases toward the switching point. The image is converted into a 3D image (S106).

  The method for converting a 2D image into a 3D image by the image conversion unit 103 is as described above. Below, the image conversion unit 103 converts the entire 2D image into a 3D image, the conversion processing that converts the subject image specified by the subject specifying unit 204 into a 3D image by providing parallax, and the region specifying unit 205 specifies Each of the conversion processes for converting the subject image included in the region into a 3D image by providing parallax will be described.

(Conversion processing for converting the entire 2D image into a 3D image)
The image conversion unit 103 performs image processing for converting the entire 2D image for a predetermined time before the switching point into a 3D image. FIG. 8 is a conceptual diagram for explaining conversion processing by the image conversion unit 103.

  FIG. 8 is a diagram schematically illustrating the progress of the 2D image before conversion and the 3D image obtained by converting the 2D image from time t81 to time t84 immediately before the switching point. FIG. 8A shows a 2D image before conversion, and FIG. 8B shows a 3D image after conversion.

  At time t81, 2D image data that is image data temporarily stored in the temporary storage unit 102 is output as it is as a 2D image D81 to an external display or the like via the image output unit 104.

  Next, the image conversion unit 103 converts 2D image data into 3D image data at a time t82 that is one second after the time t81. That is, if this conversion is not performed, the image data output as the 2D image D82 is converted into two images having parallax by the image conversion unit 103 as the 3D image data TD82.

  At this time, the parallax amount between the subject image LG821 in the left-eye image and the subject image RG821 in the right-eye image is V821, the subject image LG822 in the left-eye image, and the subject image RG822 in the right-eye image The conversion is performed so that the amount of parallax between is V822. Here, the textures related to the subject images G821 and G822 in the 2D image D82 so that the parallax amounts V821 and V822 have a size of 1/3 of the parallax amount based on the depth estimation data generated by the image conversion unit 103. It is generated by arranging.

  Subsequently, the image conversion unit 103 converts the 2D image data into 3D image data at a time t83 one second after the time t82. That is, if this conversion is not performed, the image data output as the 2D image D83 is converted by the image conversion unit 103 into two images having parallax as the 3D image data TD83.

  At this time, the parallax amount between the subject image LG831 in the left-eye image and the subject image RG831 in the right-eye image is V831, and the subject image LG832 in the left-eye image and the subject image RG832 in the right-eye image Conversion is performed so that the amount of parallax between is V832. Here, the parallax amounts V831 and V832 have the textures related to the subject images G831 and G832 in the 2D image D83 so that the parallax amounts V831 and V832 have a size of 2/3 of the parallax based on the depth estimation data generated by the image conversion unit 103. Generated by placing.

  Then, the image conversion unit 103 converts the 2D image data into 3D image data at a time t4 one second after the time t83. That is, if this conversion is not performed, the image data output as the 2D image D84 is converted by the image conversion unit 103 into two images having parallax as the 3D image data TD84. Note that this time point t4 corresponds to immediately before the switching point detected by the switching point detector 201.

  At this time, the parallax amount between the subject image LG841 in the left-eye image and the subject image RG841 in the right-eye image is V841, the subject image LG842 in the left-eye image, and the subject image RG842 in the right-eye image The conversion is performed so that the amount of parallax between is V822. Here, these parallax amounts V841 and V842 are generated by arranging the textures related to the subject images G841 and G842 in the 2D image D84 so as to have a size based on the depth estimation data generated by the image conversion unit 103. The

  As described above, the image conversion unit 103 switches the ratio of the parallax amount of the converted 3D image to the parallax amount based on the depth estimation data at each time point for the entire 2D image at a predetermined time before the switching point. Conversion from a 2D image to a 3D image is performed so as to gradually increase toward the point.

  As a result, at the timing immediately after the displayed image is switched from the 2D image to the 3D image, the 3D image is perceived as being projected too far from the observer or perceived as being pulled too much. When there is an image to be observed, the observer's eyes can be accustomed to the 3D image in advance, and the burden can be greatly reduced.

  In the above description, the case where the image conversion unit 103 converts 2D image data into 3D image data based on the depth estimation data is described. However, the image conversion unit 103 simply converts the original 2D image to the right or left direction. It is also possible to convert 2D image data into 3D image data by generating an image of another viewpoint by shifting to.

  In this case, conversion is performed so that the amount of parallax at each time point up to the switching point increases toward the switching point by gradually increasing the size to be shifted.

(Conversion processing based on the subject)
When a subject image determined by the parallax amount determination unit 203 to have a parallax amount equal to or greater than a predetermined threshold is also present in the 2D image before the switching point, the subject image is displayed when the 2D image is displayed. Is converted into a 3D image in which the amount of parallax gradually increases toward the switching point, it is possible to accustom the eyes of the observer and reduce the burden.

  Therefore, the subject specifying unit 204 first compares the 2D image data immediately before the switching point or for a predetermined time with the 3D image data immediately after the switching point or for the predetermined time, and determines whether or not the same subject image data exists. to decide.

  If the same subject image data exists, the subject image data of the 2D image data is specified as a target for increasing the amount of parallax.

  Then, the image conversion unit 103 converts the subject image specified by the subject specifying unit 204 from 2D image data to 3D image data. FIG. 9 is a conceptual diagram for explaining conversion processing by the image conversion unit 103.

  FIG. 9 is a diagram schematically illustrating the progress of the 2D image before conversion and the 3D image obtained by converting the 2D image from time t91 to time t94 immediately before the switching point. FIG. 9A shows a 2D image before conversion, and FIG. 9B shows a 3D image after conversion.

  At time t91, 2D image data, which is image data temporarily stored in the temporary storage unit 102, is output as it is as a 2D image D91 to an external display or the like via the image data output unit 104.

  Next, at time t92, which is one second after time t91, the subject specifying unit 204 specifies the subject image G921 in the 2D image D92 as a subject image that increases the amount of parallax. Then, the image conversion unit 103 converts the subject image G921 into a 3D image TD92 having the subject images LG921 and RG921 having a parallax amount in the left-eye image data and the right-eye image data, respectively.

  At this time, the parallax amount V921 between the subject image LG921 and the subject image RG921 has a size of 1/3 of the parallax amount based on the depth estimation data generated by the image conversion unit 103, and the subject image in the 2D image D92. It is generated by arranging textures related to G921.

  Next, at time point t93 one second after time point t92, the subject specifying unit 204 increases the parallax amount of the subject image G931 in the 2D image D93, which is the same subject image as the subject image G921 in the 2D image D92. It is specified as a subject image to be used as a reference. At this time, the image conversion unit 103 converts the subject image G931 into a 3D image TD93 having the subject images LG931 and RG931 having a parallax amount in the left-eye image data and the right-eye image data.

  At this time, the subject image in the 2D image D93 is such that the parallax amount V931 between the subject image LG931 and the subject image RG931 has a size of 2/3 of the amount of parallax based on the depth estimation data generated by the image conversion unit 103. It is generated by arranging textures related to G931.

  Then, at time point t84 one second after time point t83, the subject specifying unit 204 increases the amount of parallax for the subject image G941 in the 2D image D94, which is the same subject image as the subject image G921 in the 2D image D92. It is specified as a subject image to be used as a reference. At this time, the image conversion unit 103 converts the subject image G941 into a 3D image having the subject images LG941 and RG941 having a parallax amount in the left-eye image data and the right-eye image data. Note that this time point t4 corresponds to immediately before the switching point detected by the switching point detector 201.

  At this time, the texture related to the subject image G941 in the 2D image D94 is arranged so that the parallax amount V941 between the subject image LG941 and the subject image RG941 has a size based on the depth estimation data generated by the image conversion unit 103. Is generated.

  As described above, according to the subject specifying unit 204, when a subject image determined to have a parallax amount larger than a predetermined threshold is also present in a 2D image within a predetermined time before the switching point, the 2D image 2D image so that the ratio of the parallax amount of the converted 3D image to the parallax amount based on the depth estimation data at each time point gradually increases toward the switching point. To 3D images.

  As a result, at the timing immediately after the displayed image is switched from the 2D image to the 3D image, the subject image is perceived as being projected too far as viewed by the observer from the 3D image, or perceived as being drawn too much. When the subject image to be displayed exists, the observer's eyes on the subject can be accustomed to the 3D image in advance, and the burden can be greatly reduced.

(Conversion processing based on area)
The subject image included in the region in the 2D image corresponding to the region in the 3D image corresponding to the region in the 3D image including the subject image determined by the parallax amount determination unit 203 to have a parallax amount equal to or greater than the predetermined threshold is displayed. If it is converted to a 3D image in which the amount of parallax gradually increases toward the switching point, the observer's eyes can be used and the burden can be reduced.

  Accordingly, the region specifying unit 205 first specifies a region including a subject image having a parallax amount determined by the parallax amount determining unit 203 to exceed the predetermined parallax amount from the 3D image, and a 2D image corresponding to the region. Identify the area within.

  Then, the image conversion unit 103 converts the 2D image data into 3D image data so that the amount of parallax of the subject image included in the specified region increases.

  The conversion of the subject image itself is performed in the same manner as the conversion of the subject image specified by the subject specification 204 described above from the 2D image to the 3D image.

  According to the region specifying unit 205, the subject image included in the region in the 2D image corresponding to the region including the subject image determined to have the parallax amount equal to or greater than the predetermined threshold is displayed at the stage where the 2D image is displayed. It can be converted into a 3D image in which the amount of parallax gradually increases. Therefore, it is possible to reduce the burden by accustoming the eyes of the observer.

  As a result, at the timing immediately after the displayed image is switched from the 2D image to the 3D image, with respect to the image area (display area) perceived as jumping out too much when viewed by the observer in the 3D image, The observer's eyes for the image area can be accustomed to the 3D image in advance, and the burden can be greatly reduced.

  Returning to FIG. 5, when the image conversion unit 103 converts the original 2D image data into 3D image data as described above, the image data for the left eye and the image data for the right eye related to the converted 3D image data are respectively images. The data is output from the data output unit 104 to an external display device (step S107).

  As described above, according to the image processing apparatus 1 of the present embodiment, when outputting image data in which 2D image data and 3D image data are mixed, a switching point from 2D image data to 3D image data is detected. Then, the predetermined 2D image data before the switching point can be converted into 3D image data in which the parallax increases toward the switching point.

  As a result, when a subject image that may impose a burden on the observer is displayed at the timing immediately after the 2D image data is switched to the 3D image data, the 2D image is displayed without image processing. At this stage, a 3D image in which parallax gradually increases can be displayed in advance, and the burden can be greatly reduced by accustoming the eyes of the observer.

DESCRIPTION OF SYMBOLS 1 Image processing apparatus 101 Image data input part 102 Temporary memory | storage part 103 Image conversion part 104 Image data output part 110 Operation part 200 Central control part 201 Switching point detection part 202 Parallax amount derivation part 203 Parallax amount determination part 204 Subject specification part 205 Area | region Specific part

Claims (4)

A switching point detecting unit for detecting a switching point at which the image data is switched from 2D image data to 3D image data in image data in which 2D image data and 3D image data are mixed;
A parallax amount deriving unit for deriving a parallax amount between left-eye image data and right-eye image data in predetermined 3D image data after the switching point detected by the switching point detection unit;
A parallax amount determination unit that determines whether or not the parallax amount derived by the parallax amount deriving unit exceeds a predetermined value;
When the parallax amount determining unit determines that the parallax amount derived by the parallax amount deriving unit exceeds a predetermined value, predetermined 2D image data before the switching point detected by the switching point detecting unit and possess an image converter for converting the 3D image data parallax amount increases towards the switched-point,
The switching point detecting unit detects an image area corresponding to the image area in the 3D image data that the parallax amount determining unit determines that the parallax amount derived by the parallax amount deriving unit exceeds a predetermined value. An area specifying unit that specifies from 2D image data of a predetermined time before the point;
The image conversion unit converts the subject image data included in the image region in the 2D image data specified by the region specifying unit into 3D image data in which a parallax amount increases toward the switching point. Image processing device.   The image conversion unit converts 2D image data from a switching point detected by the switching point detection unit to a predetermined time before the 3D image data in which the amount of parallax increases toward the switching point. The image processing apparatus according to claim 1. A switching point detecting step for detecting a switching point at which the image data is switched from 2D image data to 3D image data in image data in which 2D image data and 3D image data are mixed;
A parallax amount derivation step for deriving a parallax amount between the image for the left eye and the image for the right eye in the predetermined 3D image data after the switching point detected in the switching point detection step;
A parallax amount determining step for determining whether or not the parallax amount derived in the parallax amount deriving step exceeds a predetermined value;
In the parallax amount determining step, when it is determined that the parallax amount derived in the parallax amount deriving step exceeds a predetermined value, a predetermined amount before the switching point detected in the switching point detecting step is determined. the 2D image data, Ri Do from the image conversion step of converting the 3D image data parallax amount increases towards the switched-point,
The switching point detecting step detects the image region corresponding to the image region in the 3D image data in which the parallax amount determining step has determined that the parallax amount derived by the parallax amount deriving step exceeds a predetermined value. A region specifying step of specifying from 2D image data of a predetermined time before the point,
The image conversion step converts the subject image data included in the image region in the 2D image data specified by the region specifying step into 3D image data in which the amount of parallax increases toward the switching point. Image processing method.   A switching point detecting step for detecting a switching point at which the image data is switched from 2D image data to 3D image data in image data in which 2D image data and 3D image data are mixed;
  A parallax amount derivation step for deriving a parallax amount between the image for the left eye and the image for the right eye in the predetermined 3D image data after the switching point detected in the switching point detection step;
  A parallax amount determining step for determining whether or not the parallax amount derived in the parallax amount deriving step exceeds a predetermined value;
  In the parallax amount determining step, when it is determined that the parallax amount derived in the parallax amount deriving step exceeds a predetermined value, a predetermined amount before the switching point detected in the switching point detecting step is determined. Causing the computer to execute an image conversion step of converting the 2D image data into 3D image data in which the amount of parallax increases toward the switching point;
  The switching point detecting step detects the image region corresponding to the image region in the 3D image data in which the parallax amount determining step has determined that the parallax amount derived by the parallax amount deriving step exceeds a predetermined value. Causing the two computers to execute an area specifying step for specifying the 2D image data for a predetermined time before the point;
  In the image conversion step, the subject image data included in the image area in the 2D image data specified by the area specifying step is converted into 3D image data in which the amount of parallax increases toward the switching point. An image processing program characterized in that

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