JP4783817B2 - Stereoscopic image display device - Google Patents

Description

  The present invention relates to a stereoscopic image display device for stereoscopically viewing an electronic video.

  Conventionally, in a device that displays a stereoscopic image using a CRT (Cathode Ray Tube) or a liquid crystal display (LCD), two images are shifted in the eye width direction to give parallax on the screen. They are displayed and presented separately for the left and right eyes for stereoscopic viewing.

  In such an apparatus, for example, Patent Document 1 discloses a stereoscopic display gaming machine that forcibly switches a stereoscopic image to a normal planar image when an allowable gaming time for stereoscopic vision has elapsed. In Patent Document 2, a timer is installed inside the apparatus so as not to continuously use the apparatus for a long time, and the power is forcibly turned off after a first predetermined time since the power is turned on. Then, an image display apparatus is disclosed in which the power is not turned on until a second predetermined time elapses thereafter.

Japanese Patent Laid-Open No. 7-16351 JP-A-6-333479

  However, in the technique disclosed in Patent Document 1, even when the ability to sense parallax is reduced due to eye fatigue due to long-time observation, since the stereoscopic display is continued without adjusting the parallax, the parallax is gradually reduced. It is impossible to make fine adjustments such as reducing the burden on the viewer's eyes. Further, in the technique disclosed in Patent Document 2, once the power is turned off, the power is not turned on until a predetermined time elapses, and for example, it is possible to adaptively switch between flat display and three-dimensional display of an image for display. If you want to turn off the power only when you use a stereoscopic display that is burdensome on your eyes for a long time on an observable display, and once the power is forcibly turned off, until the specified time has passed In other words, it becomes impossible to use a flat display that is less burdensome on the eyes.

  In addition, when a stereoscopic image is broadcast by digital broadcasting or the like, there is a request that the broadcasting station wants to set a time limit for continuous stereoscopic display of the stereoscopic image to be broadcast according to the intention of the content creator or content distribution company. There is, however, the conventional technology could not respond to this.

  In general, the amount of pop-out and retraction of a stereoscopic image (herein referred to as “stereoscopic effect”) varies from image to image. It is not appropriate to limit the allowable play time. This is because the burden given to the eyes varies depending on the strength of the three-dimensional effect. Furthermore, when broadcasting stereoscopic images by digital broadcasting, etc., conventional studies have been conducted on how to limit stereoscopic vision when continuously viewing stereoscopic images with different stereoscopic effects by switching the receiver channel. There was a problem that was not done.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the prior art, and it is an object of the present invention to provide a user-friendly stereoscopic image display device that enables more flexible control in protecting the eyes of an observer.

  In order to achieve the above object, a stereoscopic image display device according to the present invention for displaying images according to the left and right eyes of an observer includes a stereoscopic image creating means for creating a stereoscopic image from a plurality of images, and a stereoscopic image for the stereoscopic image creating means. A parallax adjusting unit that adjusts the parallax of the stereoscopic image, and when the stereoscopic image display time exceeds the first predetermined time, the parallax of the stereoscopic image created by the parallax adjusting unit with respect to the stereoscopic image creating unit is reduced And

  According to this configuration, the observer's eyes can be protected with a simple configuration by adjusting the parallax of the stereoscopic image displayed according to the fatigue of the viewer's eyes.

  A storage unit that stores the parallax of the stereoscopic image, and when the second predetermined time is exceeded after the parallax adjustment unit reduces the parallax of the stereoscopic image created by the stereoscopic image creation unit, the parallax adjustment unit stores the parallax; Based on the parallax stored in the means, the parallax of the stereoscopic image created for the stereoscopic image creating means may be restored.

  A stereoscopic image display apparatus according to another aspect of the present invention includes a stereoscopic image creating unit that creates a stereoscopic image from a plurality of images, and a warning display control unit that creates a warning display for the stereoscopic image creating unit. When the display time exceeds the first predetermined time, the warning display control means creates the warning display for the stereoscopic image creation means.

  According to this configuration, by displaying a warning message when a stereoscopic image is displayed for a long time, the observer can receive a warning that he / she has observed for a long time, so that the eyes of the observer can be used for protection. it can.

  The warning display is preferably three-dimensionally displayed. The warning display may be three-dimensionally displayed, and a plane other than the warning display may be displayed. Further, the warning display may be three-dimensionally displayed at a limit position where the observer can perceive it as a three-dimensional image. As a result, the observer can quickly feel the warning message, which can be used to protect the eyes of the observer.

  A stereoscopic image display apparatus according to another aspect of the present invention includes a stereoscopic image creating unit that creates a stereoscopic image from a plurality of images, a planar image creating unit that creates a planar image from a plurality of images, and a stereoscopic image creating unit. Display means for displaying a stereoscopic image or a planar image created by the planar image creation means, and automatically shuts off the power including at least the power of the display means when the stereoscopic image display time exceeds the first predetermined time. After the automatic power shutoff of the display means, when an operation to restore the power that has been shut off before the time when the stereoscopic image is not displayed exceeds the second predetermined time is performed on the display means by the plane image creating means The created planar image is displayed.

  If the operation of restoring the power supply that is automatically shut off is not performed even when the stereoscopic image is not displayed exceeds the second predetermined time, the entire apparatus is turned off. Therefore, when the power is turned on after the time when the stereoscopic image is not displayed exceeds the second predetermined time, the stereoscopic image display device returns to the normal state and displays the stereoscopic image.

  According to this configuration, when a stereoscopic image is continuously displayed for a long time, the stereoscopic image display device is forcibly turned off, and a predetermined time elapses even when the observer turns on the power again. Until then, the display of stereoscopic images is prohibited, so the eyes of the observer can be reliably protected, and even if the power is turned on again after a predetermined time has passed, the burden on the eyes of the observer is small The stereoscopic image display device can be used continuously by permitting the display of the planar image.

  The stereoscopic image display apparatus of the present invention further includes a stereoscopic image decoding means for decoding the stereoscopic image format data, and a separating means for separating the stereoscopic image data decoded by the stereoscopic image decoding means into image data for the left and right eyes. You may make it prepare. The format of the stereoscopic image format data is at least one including at least one stereoscopic image identification information indicating whether or not the data is for stereoscopic image display, and at least one of a first predetermined time and a second predetermined time. One stereoscopic image control information and at least one image data can be included. The image data can be compressed image data. The stereoscopic image decoding unit can include a stereoscopic image control information analyzing unit that analyzes the stereoscopic image control information of the stereoscopic image format data, and an image data unit decoding unit that decodes the stereoscopic image data of the stereoscopic image format data.

  According to this configuration, the information that is included in the stereoscopic image control information of the stereoscopic image format data and that represents the time during which an observer can view a stereoscopic image without changing the parallax or the time that can be continuously viewed as a stereoscopic image. In order to adjust the time that can be viewed without reducing parallax and the time that can be continuously viewed in units of data having stereoscopic image control information by decoding, for example, when the parallax is large and burdensome data In such a case, it is possible to reduce the burden on the eyes of the observer by changing those times.

  Further, according to the stereoscopic image format data, when transmitting stereoscopic image format data, the observer can change the stereoscopic image without changing the parallax depending on whether the parallax is large and burdensome data or not. Because information that represents the time that can be viewed and the time that can be continuously viewed as a three-dimensional image can be recorded and transmitted in advance on the transmission side, it cannot be viewed continuously for a long time so that it does not place a heavy burden on the eyes of the observer Data can be provided.

  Further, according to the stereoscopic image format data, information indicating the time during which an observer can view a stereoscopic image without changing the parallax or the time during which a viewer can continuously appreciate a stereoscopic image is displayed as the stereoscopic image control information of the stereoscopic image format data. By including it, it is not necessary to transmit it separately from the image data, and it is easy to use.

  As described above, according to the present invention, the parallax of the stereoscopic image displayed according to the eye fatigue of the observer is adjusted, a warning message is displayed when the stereoscopic image is displayed for a long time, For example, when a stereoscopic image is displayed continuously for a period of time, the display is forcibly stopped, and even if the observer performs an operation to display again, the display of the stereoscopic image is prohibited until a predetermined time elapses. By means, it is possible to protect the eyes of the observer with a simple configuration.

  In addition, a difference between a stereoscopic image having a strong stereoscopic effect and a stereoscopic image having a weak stereoscopic effect can be expressed using the stereoscopic strength, and the stereoscopic display can be limited by the magnitude of the stereoscopic strength. Furthermore, when a plurality of stereoscopic images are observed continuously, the cumulative intensity is calculated, and the stereoscopic display is restricted by comparing the cumulative intensity with a predetermined threshold value. Even when viewing stereoscopic images with different intensities continuously, it is possible to easily limit the stereoscopic display.

  Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram illustrating a configuration example of a first embodiment of a stereoscopic image display device according to the present invention.
First, a case where there are two input image data will be described.

The stereoscopic image display device according to the first embodiment of the present invention is based on either one of the stereoscopic image creation means 1 that creates stereoscopic image data by using the image data for left and right eyes and the image data for left and right eyes. A plane image creating means 6 for creating a plane image, switches 11, 12, 13, and 14 for switching input / output image data, and these switches are used for left and right eye image data (left eye image data L, Created by the switch control means 10 for controlling according to display mode information M1 indicating whether to perform stereoscopic display or planar display using the right-eye image data R), and the stereoscopic image creation means 1 or the planar image creation means 6 The frame memory 2 for storing the processed image or the input image as it is, stereoscopic display and planar display are possible, and the image data of the frame memory 2 is displayed according to the display mode information M1. Display means 3 for displaying a three-dimensional image as a three-dimensional image or a two-dimensional image, a time measurement determining means 4 for measuring the display time of a three-dimensional image when displaying a three-dimensional image, and a three-dimensional image display time exceeding a predetermined time The parallax control unit 5 instructs the stereoscopic image creation unit 1 to create a stereoscopic image by adjusting the parallax of the images for the left and right eyes. The display mode information M1 will be described later.
Further, the display means 3 is a twin-lens display means for displaying left and right eye-specific images (bi-viewpoint images).

Hereinafter, a first embodiment of the present invention will be described in detail.
Image data L for the left eye is input as the input image A1, and image data R for the right eye is input from the outside to the apparatus as the input image A2. Further, display mode information M1 is input to the switch control means 10 from the outside. Here, the display mode information M1 will be described. The display mode information M1 includes a stereoscopic image display mode (or stereoscopic display mode), a planar image display mode for left eye (or planar display mode for left eye), a planar image display mode for right eye (or a planar display mode for right eye). ), There are four types of input image through display mode (or through display mode), and this apparatus displays a stereoscopic image, a planar image display using an image for the left eye, and a right according to the input display mode information M1. Switching between planar image display using an ophthalmic image and input image through display in which an input image is planarly displayed as it is is switched. Table 1 summarizes the value of the display mode information M1, the mode name, and the image displayed in each mode.

  First, the operation of the present display device when the display mode information M1 is the input image through display mode will be described. In this case, for example, the input image A1 is displayed through. The switch control means 10 turns off the switches 11 and 12 and switches the switches 13 and 14 so that the input image A1 is through and is connected to the frame memory 2. The input image A1 is written into the frame memory 2 through the switches 13 and 14. An input image A1 is input from the frame memory 2 to the display means 3. The display means 3 displays the input image A1 on a plane. Further, A2 may be used instead of the input image A1, and which input image is used may be arbitrarily set.

  Next, the operation of the display device when the display mode information M1 is the left-eye planar image display mode will be described. The switch control means 10 is connected to the switch 13 so that the left eye image data L is input to the planar image creating means 6 by turning off the switches 11 and 12, and the frame memory 2 and the planar image creating means 6 are connected. Each switch 14 is switched as described above. Left-eye image data L is input to the planar image creating means 6 through the switch 13. Planar image data using the left-eye image is created by the planar image creation means 6 and is written into the frame memory 2 through the switch 14. Plane image data is input from the frame memory 2 to the display means 3. The display means 3 displays the input plane image data on a plane.

  FIG. 2 is a diagram showing an example of the structure of data created by the planar image creating means 6 and its display method when the display mode information M1 is a mode for displaying the left eye image L as a planar image. Assuming L1, L2, L3, L4, L5, L6, L7, and L8 are images obtained by separating the left-eye image data L into vertical strips, the planar image data created by the planar image creating means 6 is the left eye. A part of the image data L for use (the thick frame portion of the image data L for the left eye in FIG. 2) is used as it is. Here, L2, L3, L4, L5, L6, and L7 are displayed. FIG. 2 shows two types of a frame to be displayed: a view seen from the front and a view seen from above. In the view of the frame from above, for the sake of simplicity, slits (details will be described later) used in the stereoscopic display mode are not shown. As can be seen from this figure, L2 to L7 of the planar image data 201 are observed with the right and left eyes of the observer. Thus, the observer can observe the image created from the left-eye image L as a planar image.

  The display means 3 has been described above as a display means capable of three-dimensional display and two-dimensional display. However, only the three-dimensional display may be performed. FIG. 3 shows a method of creating data created by the planar image creating means 6 when the display means 3 is capable of displaying only the stereoscopic display and the display mode information M1 is a mode for displaying the left eye image L as a planar image. It is a figure which shows an example of the display method. In this case, the image used for display by the display means 3 is the same as that described in FIG. A slit 300 is provided on the display surface of the display means 3, and the images L2, L4, and L6 displayed on the frame 301 are on the left eye of the observer, and the images L3, L5, and L7 are on the right of the observer. By being sent to the eye, the observer can observe the image created from the left-eye image L as a planar image. A lens may be provided on the display surface of the display means 3 instead of the slit.

  When the display mode information M1 is the right-eye planar image display mode, a planar image is created from the right-eye image and displayed in the same manner as the left-eye planar image display mode.

  Next, the operation of the display device when the display mode information M1 is the stereoscopic image display mode will be described. When the display mode information M1 is the stereoscopic image display mode, the switch control means 10 turns on the switches 11 and 12 and controls the switch 14 so that the stereoscopic image creation means 1 and the frame memory 2 are connected. The left-eye image data L and the right-eye image data R are input from the outside to the stereoscopic image creating means 1 through the switch 11 and the switch 12, respectively. Next, stereoscopic image data is created in the stereoscopic image creating means 1 and written into the frame memory 2. Finally, stereoscopic image data is input from the frame memory 2 to the display means 3. The display means 3 stereoscopically displays the input stereoscopic image data.

  FIG. 4 is a diagram showing an example of creation and display of stereoscopic image data. L1, L2, L3, L4, L5, L6, L7, L8, and the image obtained by decomposing the right-eye image data R into vertical strips. R1, R2, R3, R4, R5, R6, R7, R8. The horizontal size of the image displayed at this time is assumed to be smaller than the horizontal size of the left-eye image data L and the right-eye image data R. For example, if the image within the range indicated by the thick frame in the image for each of the left and right eyes in FIG. 4 is actually displayed, the stereoscopic image data uses L2, R3, L4, R5, L6, and R7 as shown in FIG. Created. A slit 300 or a lens is provided on the display surface of the stereoscopic image display device, and the images L2, L4, and L6 displayed in the stereoscopic image data 301 are displayed on the left eye of the observer, and the images R3, R5, and R7. Is sent to the right eye of the observer, the observer can observe the stereoscopic image.

  In the example of FIG. 4, the method of synthesizing a stereoscopic image by thinning and synthesizing input image data has been described. In the stereoscopic image creating means 1 of FIG. 1, both the thinning and the synthesis may be performed, but the thinning process may be performed externally and only the synthesis may be performed internally. In the latter case, the left-eye image data L and the left-eye image data R input to the stereoscopic image creating means 1 from the outside are only L2, L4, L6, and L8, and only R1, R3, R5, and R7, respectively. The data is composed of

  In the present embodiment, the stereoscopic image is adjusted so that the parallax of the stereoscopic image is reduced when the stereoscopic display is continued for a predetermined time. The parallax of the stereoscopic image and how the image is seen will be described with reference to FIG.

  In FIG. 18, the distance between the left eye and the right eye of the observer is e, and the distance between the observer and the display is L. In FIG. 18A, the image observed with the right eye and the image observed with the left eye are at the same point (P1) on the display. At this time, the image is sensed as being on the display surface.

  Next, as shown in FIG. 18B, the image observed with the right eye is moved leftward from P1 by w. The image observed with the right eye is at the position P2. At this time, the image is observed to be at the position S1, and it is sensed that the image is projected from the display surface to the viewer side by d.

  Next, as shown in FIG. 18C, the image observed with the right eye is moved from P1 to the right by w. The image observed with the right eye is at the position P3. At this time, the image is observed to be at the position of S2, and it is sensed that the image is located d behind the display surface.

  In general, each pixel of a stereoscopic image has different parallax, but here, the stereoscopic effect that the observer receives from the entire image is referred to as “parallax”. Further, the parallax adjustment is performed by changing the relative position in the horizontal direction between the left-eye image and the right-eye image, as will be described later.

  Here, the processing operation of the stereoscopic image display by the stereoscopic image display apparatus shown in FIG. 1 will be described using the flowchart shown in FIG.

  In the initial state, the stereoscopic image display apparatus performs stereoscopic image display with a predetermined parallax A (S11). The time measurement determination unit 4 measures the time during which the stereoscopic image display is performed with the parallax A. At this time, the time measurement determination unit 4 performs measurement from the time when the stereoscopic display is started. While the stereoscopic image is being displayed, the stereoscopic image creation means 1 sends a stereoscopic image display notification signal to the time measurement determination means 4, and the time measurement determination means 4 measures the time t 1 when the stereoscopic image display notification signal is input. .

  The time measurement determination means 4 determines whether or not the measured time t1 exceeds the determined time TIME1 (S12), and if not, returns to step 11 and continues displaying the stereoscopic image by the parallax A. When the measured time t1 exceeds the determined time TIME1, the time measurement determination unit 4 outputs a time measurement end signal T1 to the parallax control unit 5.

  When the time measurement end signal T1 is input to the parallax control unit 5, the parallax control unit 5 sends a signal instructing the stereoscopic image creating unit 1 to create a stereoscopic image with a reduced parallax. The stereoscopic image creating unit 1 creates a stereoscopic image by reducing the parallax, and simultaneously sends a reset signal to the time measurement determination unit 4. At this time, the stereoscopic image creating unit 1 stores information indicating the parallax (parallax A) before the parallax is reduced. In this way, a stereoscopic image with a parallax B smaller than the parallax A is displayed on the display means 3 (S13).

  The “information indicating parallax” stored here is expressed by the relative position of the right-eye image data R with respect to the left-eye image data L arranged on the stereoscopic image data when the stereoscopic image data is created, for example. Is done.

  At this time, when it is desired to reduce the parallax of the stereoscopic image sensed in front of the display surface, the stereoscopic image is recreated so that the stereoscopic image is withdrawn to the back and brought closer to the display surface. Specifically, the right-eye image data R may be shifted horizontally with respect to the left-eye image data L in the right direction. Conversely, when it is desired to increase the parallax, the stereoscopic image is recreated so as to bring the stereoscopic image to the front. Specifically, the right-eye image data R may be shifted horizontally to the left with respect to the left-eye image data L.

  In addition, if you want to reduce the parallax of a stereoscopic image that is sensed deeper than the display surface, recreate the stereoscopic image so that the stereoscopic image comes out toward you and bring it closer to the display surface. Can be recreated. At this time, the shift direction of the right-eye image data R is opposite to that in the case where the stereoscopic image is sensed in front of the display surface.

  Next, an example of a method for creating a stereoscopic image by shifting the right-eye image L in the horizontal direction in order to adjust the parallax of the stereoscopic image will be described with reference to Table 2.

  When a stereoscopic image created from a part of each of the left-eye image data L and the right-eye image data R is to be displayed in front of the current display position, the image data are arranged in the order of L and R, respectively. A stereoscopic image is created using a region outside the image data. Conversely, when it is desired to retract the stereoscopic image from the display surface, the image data is arranged in the order of L and R, and a stereoscopic image is created using the inner area of each image data. For example, in FIG. 4, the upper left corner of the image is the origin of coordinates (0, 0), the horizontal direction is x, and the vertical direction is y. When the upper left coordinate of the thick frame portion in FIG. 4 is (1, 0) on both the left and right sides, if it is desired to put out the created stereoscopic image, these coordinates are newly added, and the left side is (0, 0). The right side is (2, 0), and the stereoscopic image may be recreated. Conversely, if the user wants to withdraw from the display surface, the left coordinate is (2, 0) and the right coordinate is (0, 0).

  A method of creating stereoscopic image data with reduced parallax will be described with reference to FIG. FIG. 6 is a diagram illustrating an example of creation and display of stereoscopic image data when it is desired to display a stereoscopic image that is visible in front of the display surface with a reduced parallax. For example, the stereoscopic image data in FIG. 4 is data for displaying a stereoscopic image that can be seen in front of the display surface. At this time, in order to display a stereoscopic image with a reduced parallax, the stereoscopic image may be recreated so as to be retracted. That is, as described in Table 2, as shown in FIG. 6, the upper left coordinates of the thick frame portion are (0, 0) for the left eye image data L and (2, 2) for the right eye image data R. 0). At this time, the data L1, L3, and L5 of the left-eye image data L are arranged at the positions of the data L2, L4, and L6 on the stereoscopic image data in FIG. Similarly, R4, R6, and R8 data of the right-eye image data R are arranged at positions R3, R5, and R7 on the stereoscopic image data in FIG. In the stereoscopic image data 301, L1, L3, and L5 are observed with the left eye, and R4, R6, and R8 are observed with the right eye, and the observer recognizes the stereoscopic image data as a stereoscopic.

  As described above, when it is desired to reduce the parallax, the thick frame portion in FIG. 4 is shifted to the left in the left-eye image data L and to the right in the right-eye image data R to create stereoscopic image data. If it is desired to increase the parallax, the stereoscopic image data may be created by reversing the shift direction of the thick frame portion.

  In this manner, when the displayed stereoscopic image is changed to a small stereoscopic image with a small parallax B because the display time of the stereoscopic image with the parallax A exceeds the determined time TIME1, the time measurement determination unit 4 is measuring. And the measurement of the time t2 when the stereoscopic image after the parallax change is displayed is started.

  Next, the time measurement determination means 4 compares the measured time t2 with the determined time TIME2 (S14), and returns to step 13 while the time t2 does not reach the determined time TIME2, and returns to the small parallax B stereoscopic image. Continue to be displayed. When the measured time t2, that is, the stereoscopic image display time at the parallax B, reaches the determined time TIME2, the time measurement determination unit 4 outputs a time measurement end signal T2 to the parallax control unit 5. When the time measurement end signal T <b> 2 is input to the parallax control unit 5, the parallax control unit 5 generates a signal for instructing to return the parallax of the stereoscopic image to the parallax stored in the stereoscopic image creation unit 1. Output to means 1. When a signal instructing the stereoscopic image creating unit 1 to return to the original parallax is input, the stereoscopic image creating unit 1 creates a stereoscopic image by returning the parallax to the original parallax, and at the same time, a reset signal to the time measurement determining unit 4 Send. At this time, the parallax may be immediately returned to the original parallax A, but a stereoscopic image may be created and displayed so that the parallax increases step by step.

  As described above, when the parallax is changed, the stereoscopic image creation unit 1 outputs a reset signal to the time measurement determination unit 4. When the reset signal is input, the time measurement determination unit 4 resets the measurement time to 0 and starts measurement again. By the operation as described above, a time for performing stereoscopic display with a predetermined parallax is measured, and a stereoscopic image is created while adjusting the parallax according to the time.

  Next, signals transmitted between the stereoscopic image creation means 1, the time measurement determination means 4, and the parallax control means 5 will be described with reference to Table 3.

  The state [1-1] is a state when the time measurement determination unit 4 starts measurement, and a stereoscopic image display notification signal indicating that the apparatus is displaying a stereoscopic image at this time is a stereoscopic image creation unit. 1 is output to the time measurement determination means 4.

  The state [1-2] is a state when the time TIME1 for which the measurement time of the time measurement determination unit 4 has been determined has elapsed. The state [1-2] indicates that the time TIME1 has passed from the time measurement determination unit 4 to the parallax control unit 5. A time measurement end signal T1 is output, and a signal instructing to create a stereoscopic image with a reduced parallax is output from the parallax control unit 5 to the stereoscopic image creation unit 1 accordingly. When a signal instructing to create a stereoscopic image with a reduced parallax is input to the stereoscopic image creating unit 1, a reset signal instructing to reset the time measurement determination unit 4 is received from the stereoscopic image creating unit 1. It is output to the time measurement determination means 4.

  The state [1-3] is a state when the time TIME2 for which the measurement time of the time measurement determination unit 4 is determined has elapsed. The state [1-3] indicates that the time TIME2 has passed from the time measurement determination unit 4 to the parallax control unit 5. A time measurement end signal T2 is output, and in response thereto, a signal instructing to return the parallax from the parallax control means 5 to the stereoscopic image creation means 1 and create a stereoscopic image is output. At the same time, a stereoscopic image display notification signal is output from the stereoscopic image creation means 1 to the time measurement determination means 4.

  The state [1-4] is a state when the parallax used when creating the stereoscopic image is returned to the original parallax in the stereoscopic image creating unit 1, and at this time, the reset signal is sent from the stereoscopic image creating unit 1 to the time. It is output to the measurement determination means 4.

  In this way, by observing a stereoscopic image for a long time, even if the observer's eyes are fatigued and the ability to sense the parallax of the observer has declined, by displaying the stereoscopic image with reduced parallax, The eyes of the observer can be protected. In addition, as the fatigue of the observer's eyes is recovered and the viewer's ability to sense parallax is restored, the stereoscopic image is displayed with the parallax restored, so that a stereoscopic image with less discomfort can be displayed. Each of the times TIME1 and TIME2 described above can store a preset value in a memory inside the stereoscopic image display device.

  In addition, the preset values of time TIME1 and TIME2 are not one each, but for example, the screen size of the input image or the total playback time of the input image if it is a movie, etc. A certain element may be set as a parameter, and a number corresponding to the combination of these parameters may be set. The observer may be able to set or change these times TIME1 and TIME2.

  In addition, the stereoscopic image decoding unit 500 for decoding the stereoscopic image format data F1 as shown in FIG. 7 and the stereoscopic image data decoded by the stereoscopic image decoding unit 500 are arranged on the left and right sides of the stereoscopic image display device of FIG. Separation means 504 for separating the image data for each eye may be arranged. At this time, values corresponding to the above-described times TIME1 and TIME2 may be stored in advance in the stereoscopic image format data F1, and these values may be substituted and used for TIME1 and TIME2 in the stereoscopic image display device. . The operation of the stereoscopic image decoding unit 500 at this time will be described next. The stereoscopic image decoding unit 500 includes a stereoscopic image control information analysis unit 501, an image data unit decoding unit 502, and a switch 503, and decodes the stereoscopic image format data F1.

  Here, the stereoscopic image format data F1 will be described. FIG. 8 is a diagram illustrating an example of the stereoscopic image format data F1. The illustrated stereoscopic image format data F1 includes a stereoscopic image control information portion and an image data portion. Among these, the stereoscopic image control information part is from stereoscopic image identification information I1 and control information I2 indicating whether or not the stereoscopic image format data F1 is data for stereoscopic image display, and the image data part is from encoded data D, respectively. It is configured. Here, the control information I2 is information indicating the above-described times TIME1 and TIME2. Also, the encoded data in the image data portion is, for example, an image obtained by arranging corresponding left-eye image data L and right-eye image data R side by side using an encoding method such as JPEG or MPEG. Can be. Data is stored in the stereoscopic image format data F1 in the order of I1, I2, and D.

  When the stereoscopic image control information analyzing unit 501 analyzes the stereoscopic image identification information I1 and determines that the stereoscopic image format data F1 is data for displaying a stereoscopic image, the control information I2 is set as a value indicating time TIME1 and TIME2. The stereoscopic image display mode shown in Table 1 is output as the display mode information M1 to the stereoscopic image display device, and the switch 503 is switched so that the image data part decoding unit 502 and the separation unit 504 are connected. At the same time, the encoded data D is output to the image data part decoding means 502. The image data part decoding unit 502 decodes the encoded data D to generate stereoscopic image data W2, and outputs the stereoscopic image data W2 to the separation unit 504 through the switch 503. The separation unit 504 separates the input stereoscopic image data W2 into left-eye image data L and right-eye image data R, and outputs them to the stereoscopic image display device as output image data O1 and O2, respectively. The output image data O1 and O2 are input to the stereoscopic image display device of FIG. 1 as input images A1 and A2, respectively.

  In addition, the value stored in the control information I2 in the stereoscopic image format data F1 may be one of the values of TIME1 and TIME2, and a pre-set value is used for unsaved data. Also good.

  In addition, the value stored in the control information I2 in the stereoscopic image format data F1 may be one of the values of TIME1 and TIME2, and a pre-set value is used for unsaved data. Also good.

For example, when reproducing the stereoscopic image format data F1 storing only TIME1, when the measured value of the stereoscopic display time reaches TIME1, the display control of the stereoscopic image is performed so as to reduce the parallax. It can be freely performed for each playback device. In other words, after the 3D display time has passed TIME1,
(I) The stereoscopic display is continued while reducing the parallax until the power is next turned off. (Ii) The playback apparatus uniquely sets a time corresponding to TIME2, and returns the parallax to the original state by the method already described.
(Iii) The playback device uniquely sets a predetermined time, and switches the stereoscopic display to the flat display when the stereoscopic display time reaches the predetermined time.
Etc. can be performed.

  In the above description, an example in which the parallax is reduced when the measurement value of the stereoscopic display time reaches TIME1 is described. However, the stereoscopic display may be switched to the flat display when TIME1 is reached. As a result, the intention of the creator of the stereoscopic image content can be reflected, and the eye fatigue of the observer can be recovered more quickly.

  When the stereoscopic image identification information I1 indicates that the stereoscopic image format data F1 is not data for displaying a stereoscopic image, the control information I2 is not output. Information indicating the input image through display mode is output to the stereoscopic image display device as display mode information M1. At the same time, the switch 503 is switched so that the output of the image data part decoding means 502 is output as the output image data O1. At the same time, the encoded data D is output to the image data part decoding means 502. The image data part decoding means 502 decodes the encoded data D. Assuming that the decoded data is plane image data W1, the plane image data W1 is output as output image data O1 and input as an input image A1 to the stereoscopic image display apparatus of FIG.

  Further, the data of the image data portion of the stereoscopic image format data F1 described above may not be encoded data. For example, uncompressed data may be used.

  In the above description, the display mode information M1 is obtained from the stereoscopic image identification information I1. However, the display mode information M1 may be input from the outside, and the value input from the outside may be used preferentially. However, only when the stereoscopic image identification information I1 indicates that the stereoscopic image format data F1 is not stereoscopic image display data, the display mode information M1 is forcibly set to a value indicating the input image through display mode.

  Further, the stereoscopic image control information part of the stereoscopic image format data F1 described above may be repeatedly inserted in the data F1. FIG. 9 is a diagram illustrating an example when receiving stereoscopic image content by broadcasting. For example, the mobile reception terminal 22 receives a broadcast wave of stereoscopic image content broadcast from the broadcast satellite 21. The broadcast content broadcast at this time is composed of a plurality of program arrangement information and stereoscopic image content, and the stereoscopic image control information section may be inserted as a part of this program arrangement information.

  In the stereoscopic image format data F1, the stereoscopic image control information part may be inserted in the image data part. For example, when the image data portion is data encoded by MPEG-4, the stereoscopic image control information portion may be inserted at a predetermined position defined in the MPEG-4 encoded data.

  In addition, it has been described above that the time measurement determination unit 4 performs the measurement starting from the time when the stereoscopic display is started. However, in the case of broadcasting, the data of the stereoscopic image control information section is first obtained after the reception of the broadcast content is started. If the data of the stereoscopic image control information part is included in the program arrangement information, the time measurement determination means 4 measures the display time from the time of receiving the program arrangement information first. You can start. If the time information necessary for program reproduction is included in the program arrangement information received first, the time created using the information may be used as the starting point of the measurement performed by the time measurement determination means 4. .

  In the above description, the case where the stereoscopic image format data F1 is transmitted by broadcast waves has been described. For example, a network such as a cable or the Internet may be used as a transmission path. It may be recorded on a recording medium such as

  FIG. 10 is a diagram illustrating an example of a data flow when the stereoscopic image format data F1 is recorded on a recording medium and used. For example, stereoscopic image data is input to the stereoscopic image encoding unit 510. The stereoscopic image encoding means 510 encodes the input stereoscopic image data, creates stereoscopic image format data F1, and outputs it to the recording medium 511. The recording medium 511 includes a hard disk, an optical disk, and the like, and can record input digital data. The stereoscopic image format data F1 is output from the recording medium 511 to the stereoscopic image decoding unit 512. The stereoscopic image decoding unit 512 decodes the stereoscopic image format data F1 in the same manner as the stereoscopic image decoding unit 500 described above, and outputs control information I2, display mode information M1, and stereoscopic image data.

  FIG. 11 is a diagram for explaining an example of a data flow when a network is used as a transmission path of the stereoscopic image format data F1. For example, stereoscopic image data is input to the stereoscopic image encoding unit 520. The stereoscopic image encoding means 520 encodes the input stereoscopic image data and creates stereoscopic image format data F1. The stereoscopic image format data F1 is transmitted to the stereoscopic image decoding unit 523 through the network 522. The stereoscopic image decoding unit 523 decodes the stereoscopic image format data F1 in the same manner as the stereoscopic image decoding unit 500 described above, and outputs control information I2, display mode information M1, and stereoscopic image data.

  The stereoscopic image format data F1 may be converted into data used for broadcasting such as BS and CS and transmitted. For example, stereoscopic image data is input to the stereoscopic image creation unit 520. The stereoscopic image creation means 520 encodes the inputted stereoscopic image data, creates stereoscopic image format data F1, and outputs it to the BS data creation means 521. The BS data creating unit 521 creates BS data using the stereoscopic image format data F 1 and outputs the BS data to the BS data decoding unit 524 through the network 522. The BS data decoding unit 524 generates the stereoscopic image format data F1 by decoding the input BS data, and outputs it to the stereoscopic image decoding unit 523. The stereoscopic image decoding unit 523 decodes the stereoscopic image format data F1 in the same manner as the stereoscopic image decoding unit 500 described above, and outputs control information I2, display mode information M1, and stereoscopic image data.

  In this way, the stereoscopic image display apparatus can acquire and use the times TIME1 and TIME2 used for processing from the value of the control information I2, respectively, and can conveniently set the times TIME1 and TIME2 according to individual data to be stereoscopically displayed. It is.

  Next, a case where there are three input image data will be described. FIG. 12 is a diagram illustrating a configuration example of the stereoscopic image display apparatus according to the first embodiment when the number of input image data is three.

  The stereoscopic image display apparatus generates stereoscopic image data by using multi-viewpoint image data (input images X, Y, Z) photographed from three viewpoints, and outputs the stereoscopic image data to the frame memory 2; A planar image creating means 6 for creating a planar image from any one of the multi-viewpoint image data, switches 11, 12, 601, 602, 603 for switching input / output image data, and those switches Created by the switch control means 604 for controlling according to the display mode information M′1 indicating whether to perform stereoscopic display or planar display using the viewpoint image data, and the stereoscopic image creation means 600 or the planar image creation means 6. A frame memory 2 for storing an image or an input image as it is, display means capable of stereoscopic display and planar display, and display mode information M′1 Accordingly, display means 3 for displaying the image data of the frame memory 2 as a stereoscopic image or a flat image, a time measurement determining means 4 for measuring the display time of the stereoscopic image at the time of stereoscopic image display, and display of the stereoscopic image When the time exceeds a predetermined time, the stereoscopic image creating unit 600 is configured to include a parallax control unit 5 that instructs to create a stereoscopic image by adjusting the parallax of the multi-viewpoint image. The display mode information M′1 will be described later.

  Here, the frame memory 2, the display unit 3, the time measurement determination unit 4, the parallax control unit 5, the planar image creation unit 6, and the switches 11 and 12 are the first implementations when the above-described two images are input. In order to perform the same operation as the three-dimensional image display device of the embodiment, the numbers in FIG. Hereinafter, the first embodiment of the present invention in the case of three input image data will be described with reference to FIG.

  Display mode information M ′ 1 is input to the switch control means 604 from the outside. There are eight types of display mode information M′1, three-dimensional image display modes 1 to 4, planar image display modes 1 to 3, and input image through display mode. This apparatus matches the input display mode information M′1. 3D image display using any two or three of the input images, flat image display using any one of the input images, and input image through display for displaying the input image as it is Switch each of the.

  Table 4 summarizes the relationship between the value of the display mode information M′1, the mode name, and the image displayed in each mode.

  In the stereoscopic image display mode 1, a stereoscopic image (two viewpoints) is created using the input image data X and Y, and is stereoscopically displayed. In the stereoscopic image display mode 2, a stereoscopic image (two viewpoints) is created using the input image data Y and Z, and is stereoscopically displayed. In the stereoscopic image display mode 3, a stereoscopic image (two viewpoints) is created using the input image data X and Z, and is stereoscopically displayed. In the stereoscopic image display mode 4, a stereoscopic image (three viewpoints) is created using the input image data X, Y, and Z, and is stereoscopically displayed.

  In the planar image display mode 1, a planar image is created using the input image X and displayed in a planar manner. In the planar image display mode 2, a planar image is created using the input image data Y and displayed in a planar manner. In the planar image display mode 3, a planar image is created using the input image data Z and displayed in a planar manner. In the input image through display mode, any one of the input image data X, Y, and Z is directly displayed as it is.

  The operation of the display device in the eight display modes will be described. First, the operation of this apparatus when the display mode information M′1 is any one of the stereoscopic image display modes 1 to 3 will be described.

  Any one of the stereoscopic image display modes 1 to 3 is input to the switch control means 604. The switch control means 604 turns off the switch 602, and referring to Table 4, the image data (two of the input images X, Y, Z) necessary for creating a stereoscopic image in each mode is The switches 11, 12, and 601 are controlled so as to be input to the stereoscopic image creating unit 600, and the switch 603 is controlled so that the stereoscopic image creating unit 600 and the frame memory 2 are connected. Next, the stereoscopic image creation means 600 creates stereoscopic image data (two viewpoints) in the same manner as the stereoscopic image display mode of the display mode information M1 described in the case where there are two pieces of input image data. Output to 2. Finally, stereoscopic image data is input from the frame memory 2 to the display means 3. The display means 3 stereoscopically displays the input stereoscopic image data (two-viewpoint image data).

  Further, the time measuring unit 4 and the parallax control unit 5 perform the same operation as in the case of two input image data, and adjust the parallax to perform stereoscopic display.

  In the above description, the display unit 3 is a binocular display unit that displays images for the left and right eyes (bi-viewpoint image). However, the display unit 3 is provided with a multi-view display unit that displays a 3-viewpoint image. In this case, the stereoscopic image display mode 4 can be selected.

  Next, the operation of this apparatus when the display mode information M′1 is the stereoscopic image display mode 4 will be described.

  The stereoscopic image display mode 4 is input to the switch control unit 604. The switch control means 604 turns off the switch 602 and inputs image data (input images X and Y, Z) necessary for creating a stereoscopic image in each mode with reference to Table 4 to the stereoscopic image creating means 600. Thus, the switches 11, 12, 601 are controlled, and the switch 603 is controlled so that the stereoscopic image creating means 600 and the frame memory 2 are connected. Next, stereoscopic image data (three viewpoints) is generated in the stereoscopic image generating means 600 and written into the frame memory 2. Finally, stereoscopic image data is input from the frame memory 2 to the display means 3. The display means 3 stereoscopically displays the input stereoscopic image data (three viewpoints).

  The stereoscopic image data (three viewpoints) created by the stereoscopic image creation means 600 at this time will be described with reference to FIG. FIG. 13 is a diagram showing an example of creation and display of stereoscopic image data when there are three input image data.

  X1, X2, X3, X4, X5, X6, X7, and X8 are images obtained by decomposing input image data X into vertical strips, and Y1, Y2, and X1 are images obtained by decomposing input image data Y into vertical strips. Images obtained by decomposing Y3, Y4, Y5, Y6, Y7, Y8 and the input image data Z into strips in the vertical direction are denoted as Z1, Z2, Z3, Z4, Z5, Z6, Z7, and Z8. It is assumed that the horizontal size of the image displayed at this time is smaller than the horizontal size of each of the input image data X, Y, and Z.

  For example, if the image within the range indicated by the thick frame in the input image data X, Y, and Z in FIG. 13 is actually displayed, the stereoscopic image data (three viewpoints) is X2, Y3, and Z4 as shown in FIG. , X5, Y6, Z7. A slit 300 is provided on the display surface of the stereoscopic image display device, and images X2 and X5 displayed on the display are sent to the left eye of the observer, and images Y3 and Y6 are sent to the right eye of the observer. Thus, the observer can observe the stereoscopic image from the observation position 1. Also, when the observer moves to the right, the images Y3 and Y6 are sent to the left eye of the observer, and the images Z4 and Z7 are sent to the right eye of the observer, so that the observer can view the stereoscopic image from the observation position 2. Can be observed.

  The parallax adjustment is performed in the same manner as the method described in the case of two input image data with respect to the parallax between two viewpoint images that reach the observer's eyes among images of three or more viewpoints.

  For example, first, the parallax at the observation position 1 is adjusted. The parallax at the observation position 1 is adjusted by moving the thick frames of the input image data X and Y to create a stereoscopic image. At this time, the thick frame of the input image data Z is moved and arranged by the same amount as the thick frame of Y that is the input image data of the adjacent viewpoint to create a stereoscopic image. In this case, the parallax at the observation position 1 changes, but the parallax at the observation position 2 does not change.

  Next, the parallax at the observation position 2 may be adjusted. For example, as described in the adjustment of the parallax at the observation position 1 above, after moving the thick frame of the input image Z by the same amount as the thick frame of Y which is the input image data, the thick frame of the input image Z is further moved to move the stereoscopic image To adjust the parallax parallax at the observation position 2.

  In this way, even with a multi-view display unit that displays images from three viewpoints, the method described in the case of two input image data for each of the observation position 1 and the observation position 2 is used. The parallax can be adjusted.

  Next, the operation of this apparatus when the display mode information M′1 is the planar image display mode 1 to 3 will be described. Any one of the planar image display modes 1 to 3 is input to the switch control means 604. The switch control means 604 turns off the switches 11, 12, and 601 and refers to Table 4 to generate image data (any one of the input images X, Y, and Z necessary for creating a planar image in each mode). The switch 602 controls the switch 602 so that it is input to the planar image creating means 6 and controls the switch 603 so that the planar image creating means 6 and the frame memory 2 are connected. The planar image creation means 6 creates planar image data in the same manner as the planar image display mode for the left eye (or right eye) of the display mode information M1 described in the case where there are two pieces of input image data described above. Output to 2. Finally, planar image data is input from the frame memory 2 to the display means 3. The display means 3 displays the input plane image data on a plane.

  The operation of this apparatus when the display mode information M′1 is the input image through display mode will be described. The input image through display mode is input to the switch control means 604. The switch control unit 604 turns off the switches 11, 12, and 601, and switches the switch 602 and the switch 603 so that the input image X (any one of the input images X, Y, and Z) is input to the frame memory 2. Control. An input image is output to the frame memory 2. Finally, planar image data is input from the frame memory 2 to the display means 3. The display means 3 displays the input plane image data on a plane.

  The operation of the present apparatus with respect to the display mode information M′1 has been described above. In this way, even when there are three input images, the eyes of the observer are the same as in the case of two input image data. It is possible to display the stereoscopic image by adjusting the parallax according to the fatigue of the camera. At this time, a plane image can be displayed as necessary.

  Furthermore, even when the number of input images is m (m is an integer of 4 or more), the number of inputs, the number of switches connecting the input and the stereoscopic image creating means 600, the number of contacts with the input of the switch 602, By expanding the type of the display mode information M′1 in the same way as when the input image data is expanded from 2 to 3, the display of the stereoscopic image and the parallax thereof can be adjusted.

  Further, the image data portion of the stereoscopic image format data F1 may be configured from n (n ≧ 1) viewpoints. In this case, the control information I2 includes the number of viewpoints included in the stereoscopic image format data F1. In this case, for example, in the stereoscopic image decoding unit 500 of FIG. 7, data indicating the number of viewpoints included in the stereoscopic image format data F1 is transmitted from the stereoscopic image control information analyzing unit 501 to the separating unit 504, and the stereoscopic image data W Are output by separating them by the number of viewpoints.

Next, a second embodiment of the present invention will be described.
FIG. 14 is a diagram illustrating a configuration example of the second embodiment of the stereoscopic image display apparatus according to the present invention.
The stereoscopic image display apparatus according to the second embodiment of the present invention is based on either one of the stereoscopic image creation means 100 that creates stereoscopic image data by inputting the image data for the left and right eyes, and the image data for the left and right eyes. Planar image creating means 6 for creating a planar image, switches 11, 12, 13, and 14 for switching input / output image data, switch control means 10 for controlling these switches in accordance with display mode information M1, and stereoscopic image The frame memory 2 that stores the image or input image created by the creation means 100 or the planar image creation means 6 as it is, and the image data in the frame memory 2 is displayed as a stereoscopic image or a planar image according to the display mode information M1. Display means 3, time measurement determination means 101 for measuring the display time of a stereoscopic image, and display of a stereoscopic image If during exceeds a predetermined time, and a warning display control means 102 for instructing to display a warning message on the three-dimensional image that is currently displayed on the stereoscopic image creating unit 100. Here, since the frame memory 2, the display means 3, the plane image creation means 6, the switch control means 10, and the switches 11, 12, 13, and 14 operate in the same manner as the stereoscopic image display apparatus of the first embodiment described above, FIG. The number in 14 is the same.

  Similarly to the first embodiment, display mode information M1 is input to the switch control means 10 from the outside. Here, the display mode information M1 is the same as that described in the first embodiment. Here, the operation of the display device when the display mode information M1 is the input image through display mode and when the display mode information M1 is the planar image display using the left-eye image or the right-eye image has been described in the first embodiment. This is the same as the display device.

Next, an operation when the display mode information M1 is the stereoscopic image display mode will be described.
The left-eye image data L and the right-eye image data R are input as the input image A1 and the input image A2 from the outside to the stereoscopic image creating unit 100, respectively.

  When the display mode information M1 is the stereoscopic image display mode, the switch control unit 10 turns on the switches 11 and 12 and controls the switch 14 so that the stereoscopic image creation unit 100 and the frame memory 2 are connected. The left-eye image data L and the right-eye image data R are input from the outside to the stereoscopic image creating means 100 through the switch 11 and the switch 12, respectively. Next, stereoscopic image data is generated in the stereoscopic image generating means 100 and written into the frame memory 2. Finally, stereoscopic image data is input from the frame memory 2 to the display means 3. The display means 3 displays the input stereoscopic image in three dimensions.

  Here, the processing operation of the stereoscopic image display by the stereoscopic image display apparatus shown in FIG. 14 will be described using the flowchart shown in FIG.

  In the initial state, the stereoscopic image display apparatus performs stereoscopic image display (S21). The time measurement determination unit 101 shown in FIG. 14 measures the time during the stereoscopic display. While displaying the stereoscopic image, the stereoscopic image creating unit 100 sends a stereoscopic image display notification signal to the time measurement determination unit 101, and the time measurement determination unit 101 measures the time t3 when the stereoscopic image display notification signal is input. . At this time, the time measurement determination unit 101 performs measurement from the time when the stereoscopic display is started.

  The time measurement determination means 101 determines whether or not the measured time t3 exceeds the determined time TIME3 (S22), and if not, returns to step 21 and continues displaying the stereoscopic image. When the measured time t3 exceeds the determined time TIME3, the warning display control unit 102 instructs the stereoscopic image creation unit 100 to overwrite the warning message on the displayed stereoscopic image and display the stereoscopic image. Send a signal. When this signal is input, the stereoscopic image creating means 100 creates a stereoscopic image by overwriting the warning message on the currently created stereoscopic image surface, and outputs it (S23). At this time, a three-dimensional image is created so that the warning message is at the forefront (so that it appears to be the highest when viewed from the observer).

  For example, the warning message part with parallax is overwritten on the currently displayed stereoscopic image so that the warning message is displayed in 3D at the limit pop-out position that the observer can perceive as 3D, A three-dimensional image may be created by synthesis. In addition, the parallax at this time is set as a stereoscopic display limit parallax.

  Also, instead of the stereoscopic image that has been displayed so far, a plane image is created using only the image for the left (or right) eye, and the warning message is displayed so that only the warning message portion is stereoscopically displayed. A stereoscopic image may be created by overwriting and synthesizing a portion with parallax on a portion on a planar image. Alternatively, a stereoscopic image is created by using a predetermined image instead of the stereoscopic image that has been displayed so far, and a parallax is given to the portion of the warning message, and the stereoscopic image is overwritten and synthesized on the stereoscopic image. You may make it create. For example, a black screen may be created and a warning message may be overwritten on the screen.

  Also, using the left-eye image and right-eye image of the currently displayed stereoscopic image, a disparity vector is obtained in units of blocks divided into a predetermined number of pixels, and the most pop-out amount of the obtained disparity vectors The parallax vector value that increases the maximum parallax may be used, and a parallax larger than this value may be given to the warning message portion. At this time, the given parallax should not exceed the stereoscopic display limit parallax. The disparity vector can be obtained by block matching or the like. In addition, the maximum parallax may be obtained from data other than the parallax vector in block units, such as a parallax vector in pixel units.

  Next, signals transmitted among the stereoscopic image creating unit 100, the time measurement determining unit 101, and the warning display control unit 102 will be described with reference to Table 5.

  The state [2-1] is a state when the time measurement determination unit 101 starts measuring the stereoscopic image display time, and at this time, a stereoscopic image display notification signal indicating that the present apparatus displays a stereoscopic image is displayed. The stereoscopic image creation unit 100 outputs the time measurement determination unit 101.

  The state [2-2] is a state when the time TIME3 determined by the time measurement determination unit 101 has elapsed, and the time TIME3 has passed from the time measurement determination unit 101 to the warning display control unit 102. A time measurement end signal T3 representing the above is output, and a signal instructing to display a warning message on the currently generated stereoscopic image is output from the warning display control unit 102 to the stereoscopic image generating unit 100. In this way, since the observer can know the warning that he / she has observed quickly for a long time, the eyes of the observer can be protected.

  In the above description, the warning message itself is created as a three-dimensional image and overwritten on the currently displayed three-dimensional image or an image converted to a flat image. However, the warning message itself is a flat image. It doesn't matter. Instead of displaying a warning message, you may sound a buzzer or turn on a lamp or indicator. After the warning message is displayed, the display on the display may be stopped or the display may be turned off when a predetermined time has elapsed.

  The determined time TIME3 described above represents a continuous viewing time during which the observer can view the stereoscopic image as a stereoscopic image. For the time TIME3, a preset value may be stored in a memory inside the stereoscopic image display device. In addition, the preset value of this time TIME3 is not one. For example, the screen size of the input image or the total reproduction time of the input image if it is a moving image is an element related to eye fatigue during viewing. As the parameters, the number corresponding to the combination of these parameters may be set. Further, the observer may be able to change the time TIME3.

  Further, in the preceding stage of the stereoscopic image display device of FIG. 14, the stereoscopic image decoding means for decoding the stereoscopic image format data F2 and the stereoscopic image data decoded by the stereoscopic image decoding means are the same as those shown in FIG. Separation means for separating the left and right eye image data may be arranged. At this time, the configuration of the stereoscopic image format data F2 can be configured by a stereoscopic image control information portion and an image data portion, similarly to the stereoscopic image format data F1 described in the first embodiment of the present invention. However, the value stored in the control information I2 in the stereoscopic image format data F2 is a value corresponding to the above-described time TIME3, and this value is set at the time TIME3 used by the time measurement determination unit 101 in the stereoscopic image display device. May be used.

  In addition, the operations of the stereoscopic image decoding unit and the separation unit at this time are the same as those described in the first embodiment of the present invention.

  The data in the image data portion of the stereoscopic image format data F2 described above may not be encoded data. For example, uncompressed data may be used. Further, the stereoscopic image control information portion of the stereoscopic image format data F2 described above is repeatedly inserted into the data F2, for example, as a part of the program arrangement information, as described in the first embodiment of the present invention. It does not matter.

  Further, in the stereoscopic image format data F2, the stereoscopic image control information part may be inserted in the image data part as described in the first embodiment of the present invention. For example, when the image data portion is data encoded by MPEG-4, the stereoscopic image control information portion may be inserted at a predetermined position defined in the MPEG-4 encoded data.

  Also, if the display device is equipped with receiving means capable of receiving the above-mentioned broadcast and is equipped with a recording means or an external recording device is connected, it is determined during reception of the stereoscopic image broadcast When the time TIME3 is exceeded, a warning message may be displayed on the display means of the stereoscopic image display device, and recording may be started simultaneously with subsequent broadcast recording.

  In addition, as described above, the time measurement determination unit 101 performs the measurement starting from the time when the stereoscopic display is started. However, in the case of broadcasting, in the case of broadcasting, the content of the broadcasting content is described as described in the first embodiment of the present invention. The time when the data of the stereoscopic image control information part is first received after the reception is started, or the time when the program arrangement information is first received if the data of the stereoscopic image control information part is included in the program arrangement information The time measurement determination unit 101 may start measurement of the display time from the starting point. If the time information necessary for program reproduction is included in the program arrangement information received first, the time created using the information may be used as the starting point of the measurement performed by the time measurement determination unit 101. .

  In the above description, the case where the stereoscopic image format data F2 is transmitted by a broadcast wave has been described. For example, a network such as a cable or the Internet may be used as a transmission path. It may be recorded on a recording medium such as

  In this way, in the stereoscopic image display device, the time TIME3 determined from the control information value of the stereoscopic image format data F2 can be substituted and used in the same manner as in the first embodiment of the present invention, and stereoscopic display is performed. This is convenient because the time TIME3 used by the time measurement determination means 101 can be set according to individual data.

  Although the operation of the apparatus has been described in the case where there are two input images, the second embodiment is different from the first embodiment of the present invention in the case where there are three or more input image data. It can be extended as well.

  Further, the image data portion of the stereoscopic image format data F2 may be configured from n (n ≧ 1) viewpoints. In this case, the image data portion is the same as the expansion method described in the first embodiment of the present invention. The stereoscopic image decoding unit 500 and the separating unit 504 may be expanded by the method.

Next, a third embodiment of the present invention will be described.
FIG. 16 is a diagram illustrating a configuration example of the third embodiment of the stereoscopic image display device according to the present invention.
The stereoscopic image display apparatus according to the third embodiment of the present invention performs display mode information M1 indicating whether stereoscopic display or planar display is performed using only the left and right eye image data, and performs only planar display. Mode switch control means comprising a switch 201 for switching either one of the displayed flat display mode information M2 to an input of the switch control means 200, and a memory for storing a stereoscopic display prohibition flag for switching the switch 201 202, a stereoscopic image creating unit 203 that creates a stereoscopic image from left and right eye image data, and a planar image creating unit 6 that creates a planar image from either one of the left and right eye image data. Switches 11, 12, 13, 14 for switching image data, switch control means 200 for controlling those switches, A frame memory 2 for storing an image created by the image creation means 203 or the planar image creation means 6, a display means 3 for displaying a stereoscopic image using image data of the frame memory 2, and a display time of the stereoscopic image are measured. A first time measurement determination unit 204; a power control unit 206 forcibly turning off power other than the second time measurement determination unit 205 when the display time of the stereoscopic image exceeds a predetermined time; It is comprised from the 2nd time measurement determination means 205 which measures the elapsed time after being cut. Here, the frame memory 2, the display unit 3, the planar image creation unit 6, and the switches 11, 12, 13, and 14 operate in the same manner as the stereoscopic image display devices of the first and second embodiments described above. The numbers in are also the same.

  The display mode information M1 is the same as that described in the first embodiment. The flat display mode information M2 will be described later.

  In the same manner as in the first and second embodiments, display mode information M1 is input to the switch control unit 200 from the outside. Here, the operation of the display device when the display mode information M1 is the input image through display mode and when the display mode information M1 is the planar image display using the left-eye or right-eye image will be described in the first embodiment. This is the same as the operation of the display device.

  Next, the case where the display mode information M1 is the stereoscopic image display mode will be described. Display mode information M1 and flat display mode information M2 are input to the switch 201 from the outside. The switch 201 connects either the display mode information M1 or the flat display mode information M2 to the input of the switch control means 200. Switching of the switch 201 is controlled by the mode switch control means 202.

  The mode switch control unit 202 includes a memory therein and stores a stereoscopic display prohibition flag in the memory. Here, the mode switch control means 202 is a means for controlling the switch 201. For example, when the stereoscopic display prohibition flag is 0, the display mode information M1 is input to the switch control means 200 when the display mode information M1 is 1. The switch 201 is controlled so that If the initial value of the stereoscopic display prohibition flag is set to 0, the switch 201 is connected to the display mode information M1 side at the start of operation.

  Here, the flat display mode information M2 will be described. For example, as shown in Table 6, the flat display mode information M2 includes only two types of the left-eye flat image display mode and the right-eye flat image display mode described in the display mode information M1.

  FIG. 17 is a flowchart showing the operation after the start of stereoscopic display of the stereoscopic image display apparatus according to the third embodiment of the present invention. The operation of the present apparatus in each display mode will be described in detail with reference to FIGS.

  When the apparatus is turned on, after the initial processing, it is determined in step 31 whether or not stereoscopic display should be performed. This determination process is performed based on the content of the display mode information M1. When the display mode information M1 is the planar image display mode, the process proceeds to step 32, and the planar image display is performed according to the location indicated by the display mode information M1.

  If the display mode information M1 is the stereoscopic image display mode, the process proceeds from step 31 to step 33, the value of the stereoscopic display prohibition flag in the memory inside the mode switch control means 202 is set to 0, and the process proceeds to step 34. In step 34, a stereoscopic image is created by the stereoscopic image creation means 203, and the time t4 during which the stereoscopic image is displayed is measured by the first time measurement determination means 204. At this time, the first time measurement determination unit 204 performs measurement starting from the time when the stereoscopic image display is started.

  The display mode information M1 is input to the switch control means 200. When the input display mode information M1 is the stereoscopic image display mode, the switch control means 200 turns on the switches 11 and 12, turns off the switch 13, and turns off the switch 14. Are controlled so that the frame memory 2 and the stereoscopic image creating means 203 are connected. The left eye image data L is input to the switch 11 and the switch 13, and the right eye image data R is input to the switch 12 and the switch 13, respectively. Left-eye image data L and right-eye image data R are input to the stereoscopic image creation means 203 through the switches 11 and 12, respectively. In the stereoscopic image creating means 203, stereoscopic image data is created in the same manner as described in the first embodiment, and written into the frame memory 2 through the switch. The created stereoscopic image data is input from the frame memory 2 to the display means 3 and displayed. While the stereoscopic image is being displayed, the stereoscopic image creation means 203 sends a stereoscopic image display notification signal to the first time measurement determination means 204, and the first time measurement determination means 204 receives the stereoscopic image display notification signal. Measure the time while you are.

  Next, the process proceeds to determination step 35. The time t4 measured by the first time measurement determination unit 204 is input to the power supply control unit 206. In determination step 35, the power supply control means 206 determines whether or not the measurement time t4 input from the first time measurement determination means 204 has exceeded a predetermined time TIME4. If it is determined that the measured time t4 does not exceed the time TIME4, the process returns to step 34, where the stereoscopic image creating means 203 creates a stereoscopic image and displays the created stereoscopic image on the display means 3. When it is determined that the time t4 measured by the first time measurement determination unit 204 exceeds the time TIME4, the process proceeds to step 36.

  In step 36, the apparatus operates as follows. The power control unit 206 transmits a stereoscopic display prohibition signal indicating prohibition of stereoscopic display of an image to the mode switch control unit 202, and resets the measurement time to 0 to the second time measurement determination unit 205 to perform measurement. A measurement start signal instructing to start is transmitted. And the partial power supply of an apparatus is turned off. For example, the power supply other than the mode switch control unit 202 and the second time measurement determination unit 205 is forcibly turned off. In the mode switch control means 202, at the same time as the stereoscopic display prohibition signal is inputted, the stereoscopic display prohibition flag is set to 1 and stored in the memory in the mode switch control means 202.

  Here, Table 7 shows the signals transmitted among the stereoscopic image creation means 203, the first time measurement determination means 204, the power supply control means 206, the second time measurement determination means 205, and the mode switch control means 202. The description will be given with reference.

  The state [5-1] is a state when the first time measurement determination unit 204 starts measuring the stereoscopic image display time, and at this time, the stereoscopic image display indicating that the present apparatus displays a stereoscopic image. A notification signal is output from the stereoscopic image creation means 203 to the first time measurement determination means 204.

  The state [5-2] is a state when the time TIME4 for which the measurement time of the first time measurement determination unit 204 is determined has elapsed, and the time TIME4 is transferred from the first time measurement determination unit 204 to the power supply control unit 206. A time measurement end signal T4 indicating that the period of time has elapsed has been output, and accordingly, the power supply control means 206 instructs the second time measurement determination means 205 to reset the measurement time to 0 and start measurement. A start signal and a stereoscopic display prohibition signal are output to the mode switch control means 202, respectively.

  Receiving the measurement start signal, the second time measurement determination unit 205 starts measuring the elapsed time (stereoscopic image non-display time) t5 after stopping the stereoscopic display.

  Next, the process proceeds to determination step 37. In the determination step 37, it is determined whether or not the time t5 measured by the second time measurement determination means 205 has exceeded the determined time TIME5. When it is determined that the time t5 has passed the time TIME5, the mode switch control means 202 sets the stereoscopic display prohibition flag to 0 and stores it in the memory, sends a measurement stop signal to the second time measurement determination means 205, and sets the mode. The power source of the switch control means 202 is turned off. At the same time as the measurement stop signal is input to the second time measurement determination unit 205, the second time measurement determination unit 205 resets the measurement time t5 and turns off the power of the second time measurement determination unit 205.

  Table 8 shows signals transmitted between the second time measurement determination unit 205 and the mode switch control unit 202 at this time.

  The state [6-1] is a state when the measurement time t5 of the second time measurement determination unit 205 has passed the determined time TIME5. From the second time measurement determination unit 205 to the mode switch control unit 202. A time measurement end signal T5 indicating that the time TIME5 has passed is output from the mode switch control means 202 to the second time measurement determination means 205, respectively.

  In this way, when the power is not turned on even after a predetermined time TIME5 has elapsed since part of the power of the apparatus is forcibly turned off (the operation for resuming image display is not performed). In step 38, the mode switch control means 202 sets the stereoscopic display prohibition flag to 0 and stores it in the memory, turns off all power supplies, and ends the operation.

  If it is determined in the determination step 37 that the stereoscopic image non-display time t5 started in step 36 has not passed the determined time TIME5, the process proceeds to a determination step 39.

  In a determination step 39, it is determined whether or not an operation for displaying an image on the apparatus has been performed, that is, whether or not the power switch of the apparatus has been pressed. If it is determined that the power switch has not been pressed, the process returns to step 37 to continue measuring time t5. On the other hand, if it is determined that the power switch has been pressed, the process proceeds to step 40. In step 40, a process for turning on the power of the entire apparatus is performed. Thereafter, the process proceeds to step 41, where the apparatus prohibits the display of a stereoscopic image and displays a planar image as follows.

  For example, in FIG. 16, display mode information M1 and flat display mode information M2 are input to the switch 201 from the outside. The mode switch control unit 202 refers to the stereoscopic display prohibition flag in the memory, and since the value thereof is 1, the mode switch control unit 202 controls the switch 201 so that the flat display mode information M2 is input to the switch control unit 200. The switch 201 is connected to the display mode information M2 side, and the plane display mode information M2 is input to the switch control means 200 through the switch 201.

  Here, assuming that the planar display mode information M2 is the left-eye planar image display mode, the switch control unit 200 turns off the switches 11 and 12, and the switch 13 displays the left-eye image data L as the planar image creation unit 6. Are switched so that the frame memory 2 and the planar image creating means 6 are connected to each other. Planar image data of the left-eye image is created by the planar image creation means 6 and is written into the frame memory 2 through the switch 14. Plane image data is input from the frame memory 2 to the display means 3. The display means 3 displays the input plane image data. The planar image created at this time is created in the same manner as in the case where the display mode information M1 is the left-eye planar image display mode described in the first and second embodiments of the present invention. As described above, a plane image is created and displayed according to the plane display mode information M2.

  Further, the second time measurement determination unit 205 continues to measure the time t5 while the planar image is displayed in this way, and the second time measurement determination unit 205 performs the same as in the case of the stereoscopic display. The measured time t5 is input to the mode switch control means 202. In step 42, it is determined whether or not the measurement time t5 has reached the determined time TIME5, and the plane until the time t5 measured by the second time measurement determination means 205 passes the determined time TIME5. The image is displayed, and at the same time as the measured time t5 reaches time TIME5, the process proceeds to step 43. In step 43, the mode switch control unit 202 performs a stereoscopic display restart process such as sending a measurement stop signal to the second time measurement determination unit 205. The second time measurement determination unit 205 resets the measurement time simultaneously with the input of the measurement stop signal, and stops the time measurement. Thereafter, returning to step 33, the mode switch control means 202 sets the stereoscopic display prohibition flag to 0 and stores it in the memory. Thereafter, since the stereoscopic display prohibition flag is 0, a stereoscopic image is displayed along the display mode information M1.

  At this time, when a 3D display permission signal indicating that 3D image display is permitted is input to the mode switch control unit 202, a message permitting display of 3D images may be displayed on the screen.

  In this way, when a stereoscopic image is displayed continuously for a long time, the power of the stereoscopic image display device is forcibly turned off, and even if the observer turns on the power again, the power is forcibly By prohibiting the display of the stereoscopic image until a predetermined time TIME5 has passed since the turning off, it is possible to reliably protect the eyes of the observer. In addition, when the power is turned on again after a predetermined time TIME5 has not passed since the power was forcibly turned off, stereoscopic image display is permitted by allowing display of a flat image with less burden on the eyes of the observer The device can be used continuously.

  Alternatively, only the display unit 3 may be turned off after the stereoscopic image display time t4 reaches a predetermined time TIME4. After only the display unit 3 is turned off, the display unit 3 may be turned on again by the observer pressing a button on the stereoscopic image display device. For example, when the power button is pressed, the display unit 3 may be turned on.

  The determined time TIME4 described above represents a continuous viewing time during which the observer can view a stereoscopic image as a stereoscopic image. For the times TIME4 and TIME5 described above, preset values may be stored in a memory inside the stereoscopic image display device. Also, the preset values of time TIME4 and TIME5 are not one each, but are related to eye fatigue during viewing such as the screen size of the input image or the total playback time if the input image is a moving image, for example. The elements may be set as parameters, and the number corresponding to the combination of these parameters may be set. The observer may be able to change the values of TIME4 and TIME5.

  In addition, the stereoscopic image decoding means for decoding the stereoscopic image format data F3, and the stereoscopic image data decoded by the stereoscopic image decoding means, as shown in FIG. Separating means for separating the left and right eye image data may be arranged. At this time, the configuration of the stereoscopic image format data F3 includes a stereoscopic image control information portion and an image data portion, similarly to F1 and F2 described in the first and second embodiments of the present invention. However, the values stored in the control information I2 inside the stereoscopic image format data F3 are values corresponding to the above-described times TIME4 and TIME5, and the stereoscopic image display apparatus acquires these values from F3 and uses them. You may make it do.

  Further, the value stored in the control information I2 inside the stereoscopic image format data F3 may be either time TIME4 or TIME5, and a pre-set value may be used for unsaved data. .

  In addition, the operations of the stereoscopic image decoding unit and the separation unit at this time are the same as those described in the first and second embodiments of the present invention. Further, the data of the image data portion of the stereoscopic image format data F3 described above may not be encoded data. For example, uncompressed data may be used.

  Further, the stereoscopic image control information part of the stereoscopic image format data F3 described above is, for example, in the data F3 as a part of the program arrangement information, as described in the first and second embodiments of the present invention. It may be inserted repeatedly. In the stereoscopic image format data F3, the stereoscopic image control information part may be inserted into the image data part, as described in the first and second embodiments of the present invention. For example, when the image data portion is data encoded by MPEG-4, the stereoscopic image control information portion may be inserted at a predetermined position defined in the MPEG-4 encoded data.

  In addition, although the first time measurement determination unit 204 has been described above to perform the measurement starting from the time when the stereoscopic display is started, the broadcast is the same as that described in the first and second embodiments of the present invention. In this case, the time when the data of the stereoscopic image control information portion is first received after the start of the reception of the broadcast content, or if the data of the stereoscopic image control information portion is included in the program arrangement information, the program is first displayed. Starting from the time when the sequence information is received, the first time measurement determination unit 204 may start measuring the display time. If the time information necessary for program reproduction is included in the program arrangement information received first, the time created using the information is the starting point of the measurement performed by the first time measurement determination unit 204. It is good.

  In the above description, the case where the stereoscopic image format data F3 is transmitted by broadcast waves has been described. For example, a network such as a cable or the Internet may be used as a transmission path. It may be recorded on a recording medium such as

  In this way, in the stereoscopic image display device, the times TIME4 and TIME5 can be substituted and used from the control information value of the stereoscopic image format data F3 in the same manner as in the first and second embodiments of the present invention. This is convenient because TIME4 and TIME5 can be set according to the individual data to be displayed. Also, as described above, when a stereoscopic image is displayed continuously for a long time, the stereoscopic image display device is forcibly turned off, and the observer turns on the power again, the stereoscopic image display is performed. The stereoscopic image display apparatus may be configured to resume display immediately before the apparatus is forcibly turned off. For example, if the power is turned off while playing a file, if you resume playback from the time immediately before it was turned off or watch the broadcast, you will receive the same channel broadcast immediately. It doesn't matter.

  In addition, when the display device is provided with receiving means capable of receiving the above-mentioned broadcast and is provided with recording means or an external recording device is connected, the three-dimensional image is continuously displayed for a predetermined time TIME4 or more. When the image is observed, the stereoscopic image display device is turned off while receiving the stereoscopic image broadcast, and simultaneously starts recording. The receiving means and the recording means continue to receive the broadcast without turning off the power, and the power is turned on. You can keep recording the broadcast while it is turned off. In this way, it is possible to reproduce and view a stereoscopic image broadcast while the power is off.

  The operation of the apparatus in the case where there are two input images has been described above, but in this embodiment, the input image data is 3 by the same method as that described in the first and second embodiments of the present invention. It can be extended to more than one case.

  Further, the image data portion of the stereoscopic image format data F3 may be configured from n (n ≧ 1) viewpoints, and in this case, the same as described in the first and second embodiments of the present invention. In this way, the stereoscopic image decoding unit 500 and the separating unit 504 may be expanded.

  The stereoscopic image display device according to the first, second, and third embodiments of the present invention described above includes a means for storing a password and a password input unit for inputting the password, and requests the input of the password when used. To do. At this time, the stereoscopic image display device may distinguish an observer for each password and manage the stereoscopic image display time for each observer.

  By managing the time for displaying the stereoscopic image for each observer by distinguishing the observer for each password, it is possible to use the stereoscopic image display device for each observer without being affected by the conditions used by other observers. it can. That is, a stereoscopic image display device is configured in a mode in which a single observer displays a stereoscopic image by requesting a password at the time of use and managing the time for displaying the stereoscopic image for each observer by distinguishing the observer for each password. Even after the power is forcibly turned off after a long period of use, other viewers can use the stereoscopic image display device in a mode for displaying a stereoscopic image.

  In addition, stereoscopic display with adjustment of parallax, warning display, transition to flat display, and use of a password for each observer according to the present invention can also be applied to a multi-view display device.

Next, a fourth embodiment of the present invention will be described.
As described in the description of the first embodiment, the stereoscopic image has parallax, and the observer senses the stereoscopic effect by the parallax. Although the parallax of each pixel of the stereoscopic image is different, for example, the stereoscopic effect of the stereoscopic image with many pixels having large parallax is large, and the stereoscopic effect of the stereoscopic image with few pixels having large parallax is small. The index indicating the magnitude of the stereoscopic effect is called “stereoscopic strength”. This embodiment relates to a method for restricting stereoscopic image display when a plurality of stereoscopic images have different stereoscopic strengths.

  The three-dimensional intensity may be determined objectively by the average value of parallax values for each pixel (average value of the entire screen in the case of a still image or average value of the entire moving image in the case of a moving image), or by subjective evaluation. Also good. Or you may determine by the weighted average of both. As the objective evaluation value, a weighted average value, median, maximum value, or the like may be used instead of the average value. In the case of a moving image, the maximum value for each frame may be obtained, and the average value, median, maximum value, etc. of all the maximum values over all frames may be used as the objective evaluation value.

  In general, when observing a stereoscopic image having a high stereoscopic strength, eye fatigue is accelerated compared to a stereoscopic image having a low stereoscopic strength. Therefore, it is necessary to provide a difference in the allowable time for stereoscopic display depending on the stereoscopic strength.

  FIG. 19 is a diagram illustrating the relationship between the stereoscopic strength (I) and the allowable time for stereoscopic display. FIG. 19A shows a case where I = 1, and it is assumed that “cumulative intensity” (vertical axis) that increases at a constant rate (k = α) as the stereoscopic display time (horizontal axis) elapses is calculated. . Here, the value of the cumulative intensity is 0 at time 0 and TH at time t1. Further, TH represents a predetermined threshold value, and the stereoscopic display device of the present invention performs the following process at the time (t1) when the cumulative intensity value reaches TH.

(1) Switch the display mode from stereoscopic display to flat display.
(2) Continue stereoscopic display by adjusting the parallax to be reduced. (3) Display a warning message on the screen.
In the case of adopting the method (1), t1 has a meaning of an allowable time of a time for continuous stereoscopic display (stereoscopic display time). In addition, the message (3) indicates that the stereoscopic display time has passed the permissible time, prompts the user to switch to flat display, and the like. Any one of these processes may be used, but a plurality may be used in combination. For example, (1) and (2) are combined, and at the same time the display mode is switched to flat display, a message informing that is displayed on the screen.

  FIG. 19B shows a case where I = 2, and the cumulative intensity is calculated in the same manner as described above, but the constant ratio k is twice that of FIG. 19A (k = 2α). Therefore, the time (t2) for the cumulative intensity value to reach the threshold value TH is half of t1. When the stereoscopic display device adopts the above method (1), the allowable time for displaying a stereoscopic image is half that in the case of FIG.

  Generally, the cumulative intensity (AI) is expressed as follows using the three-dimensional intensity I and the three-dimensional display time t.

AI = f (I, t)
Here, f (I, t) is a function of I and t. In the case of FIG. 19 f (I, t) = k (I) · t
It becomes. However, k (I) is a function of I. In the case of FIG. 19, k (I) = α · I (α is a constant)
It is.

Other functions of f and k are f (I, t) = k (I) · t + m (m is a constant)
k (I) = α · I + β (α and β are constants)
A linear function, a quadratic or higher function, or other functions may be used. The constants m, α, and β are values determined by experiments. If α is positive, k (I) in the above equation becomes a monotonically increasing function of I, and if k (I) is positive, f (I, t) in the above equation becomes a monotonically increasing function of t.

  When the cumulative intensity is increased with time as shown in FIG. 19, the stereoscopic display device of the present invention performs a process of adding a constant amount (s · I) to the cumulative intensity at regular time intervals (d). Here, s is a predetermined constant, and the relationship between s and α is as follows.

α = (s / d)
The relationship between the cumulative intensity and time at this time is shown in FIG. For example, when the time is expressed in seconds and the cumulative intensity is increased by 3 every second for a stereoscopic image having a stereoscopic intensity I of 1, d = 1 and s = 3.

  The stereoscopic display device of the present invention compares the cumulative intensity with the threshold value TH every time the cumulative intensity is increased by s · I. If the cumulative intensity is smaller than TH, the stereoscopic display is continued. Any one of the processes described in (3) is adopted.

  FIG. 21 shows another example showing the relationship between the three-dimensional intensity, its accumulated intensity, and the allowable time for three-dimensional display. In this example, the cumulative intensity increases at the same rate when the solid intensity I is 1 and 2, and the threshold value TH is different. In other words, a threshold value TH2 that is half of TH1 is used when I = 2 with respect to a value TH1 that is used when I = 1. Thus, when I = 1, the cumulative intensity reaches the threshold at time t1, and when I = 2, the cumulative intensity reaches the threshold at time t2 which is half of t1. After the cumulative intensity reaches the threshold value, the stereoscopic display device performs any one of the processes (1) to (3).

Thus, the object of the present embodiment can be achieved by using different threshold values for different solid strengths.
Next, a method for restricting stereoscopic display when a plurality of stereoscopic images having different stereoscopic strengths are stereoscopically displayed in succession will be described.

  FIG. 22 shows an example of the relationship between display time and accumulated intensity. In this example, a stereoscopic image having a stereoscopic intensity I = 2 is stereoscopically displayed from time 0 to time a, a stereoscopic image having a stereoscopic intensity I = 3 is stereoscopically displayed from time a to time b, and the stereoscopic intensity I = 3 stereoscopic images are displayed in 3D. At this time, the cumulative intensity increases from time 0 to time a with a slope k = 2α, increases from time a to time b with a slope k = α, and increases from time b with a slope k = 3α. THm is a threshold value, and at the time c when the cumulative intensity reaches THm, any one of the processes (1) to (3) described above is adopted.

  When the process (1) is adopted, the display mode of the stereoscopic display device is switched to flat display at time c. Although detailed description of the subsequent processing is omitted in the present embodiment, for example, as shown in FIG. 22, the cumulative intensity after the time c is decreased at a certain rate, and when the cumulative intensity becomes 0, the stereoscopic display is performed again. Switch to.

FIG. 23 is a block diagram showing the stereoscopic image encoding apparatus of this embodiment.
The stereoscopic image control information generation unit 2301 generates the stereoscopic image control information unit described in FIG. 8 from the stereoscopic intensity and the threshold value. For example, an integer from 1 to 4 is used as the solid intensity, and this is expressed by a 2-bit variable “3D_intensity”. Also, a variable from 0 to 65535 is used as the threshold value, and this is expressed by a 16-bit variable “3D_threshold”. These pieces of information are encoded with a fixed length or a variable length. In the case of variable length encoding, Huffman encoding, arithmetic encoding, or the like is used.

  The stereoscopic image encoding means 2302 encodes original image data by a still image encoding method such as JPEG or a moving image encoding method such as MPEG to obtain encoded data. Here, it is assumed that the original image data includes right-eye image data and left-eye image data. The pre-processing for thinning out the right-eye image data and the left-eye image data, combining them both right and left, and obtaining an image for encoding is also performed here. In addition, encoding includes not only image compression such as JPEG and MPEG, but also bitmap representation and computer graphics representation.

  The multiplexing unit 2303 multiplexes the encoded data and the stereoscopic image control information unit to obtain stereoscopic image format data. At this time, the stereoscopic image identification information I1 is also inserted into the stereoscopic image format data. Since this has been described with reference to FIGS. 8 and 9, a description thereof will be omitted. The multiplexed stereoscopic image format data is stored in a recording medium or transmitted to a transmission medium.

  As described above, information indicating the stereoscopic intensity and threshold value for a stereoscopic image is stored or transmitted together with the encoded data of the stereoscopic image.

FIG. 24 is a block diagram showing a stereoscopic image decoding apparatus according to this embodiment.
The demultiplexing means 2401 receives the stereoscopic image format data stored in the recording medium or sent to the transmission medium, and separates the encoded data and the stereoscopic image control information section from this.

  The stereoscopic image decoding unit 2403 decodes the encoded data to obtain decoded image data. Here, it is assumed that the decoded image data includes right-eye image data and left-eye image data. Separation of the image data for the right eye and the image data for the left eye is also performed here.

  The stereoscopic image control information analyzing unit 2402 analyzes the stereoscopic image control information part and decodes the stereoscopic intensity and the threshold value. For example, a 2-bit variable “3D_intensity” is obtained as the solid intensity, and a 16-bit variable “3D_threshold” is obtained as the threshold.

  As described above, the information indicating the stereoscopic intensity and the threshold value stored or transmitted together with the encoded data of the stereoscopic image is decoded.

  FIG. 25A is a block diagram showing the stereoscopic image display apparatus of this embodiment. In this apparatus, the stereoscopic display is limited as shown in (1) to (3) by using the three-dimensional intensity and the threshold value by the above-described method.

  The display control means 2501 calculates the cumulative intensity according to the three-dimensional intensity, and based on the comparison result between the cumulative intensity and the threshold, the three-dimensional image creating means 2502, the planar image creating means 2503, the switch 2504, and the display means 2505 are as follows. To control.

  When the accumulated intensity is smaller than the threshold value, the stereoscopic image creating means 2502 is operated to create an image for stereoscopic display, and the planar image creating means 2503 is stopped. The switch 2504 is connected to the stereoscopic image creating means 2502 side, and an image for stereoscopic display is sent to the display means 2505. Further, the display unit 2505 is set to the stereoscopic display mode, and an image for stereoscopic display is displayed.

  When the cumulative intensity is greater than or equal to the threshold value and stereoscopic display is restricted as in (1) above, the planar image creating means 2503 is operated to create an image for planar display, and the stereoscopic image creating means 2502 is stopped. . The switch 2504 is connected to the plane image creating means 2503 side, and an image for plane display is sent to the display means 2505. Further, the display unit 2505 is set to the flat display mode, and an image for flat display is displayed.

  When the stereoscopic intensity is equal to or greater than the threshold and the stereoscopic display is limited as described in (2) above, the operation of the stereoscopic image creating means 2502 is basically the same as when the cumulative intensity is smaller than the threshold. However, the display control unit 2501 changes the operation mode of the stereoscopic image creating unit 2502, and the stereoscopic image creating unit creates a stereoscopic image with less parallax by the method described above.

  The case where the solid intensity is equal to or higher than the threshold and the stereoscopic display is restricted as in (3) above is basically the same as the case where the cumulative intensity is smaller than the threshold, but the display unit 2505 gives a warning message. Is displayed.

  Since the method for creating the stereoscopic display image and the flat display image is the same as that described in the first to third embodiments, description thereof is omitted here.

As the processing when the cumulative intensity reaches the threshold value, the processing of (1) to (3) has been exemplified so far. However, a plurality of processing contents are prepared in advance, and it is adaptive to determine which set is taken. You may make it possible to select. For example, A. Process (1) is performed.
B. Process (2) is performed.
C. Process (3) is performed.
D. Processes (1) and (3) are performed.
E. Processes (2) and (3) are performed.
Is defined in advance, and information indicating which of the sets A to E is taken is included in the stereoscopic image control information section. Therefore, the stereoscopic image encoding apparatus stores or transmits the information S indicating the set together with the encoded data of the stereoscopic image, the stereoscopic image decoding apparatus decodes the information S, and the stereoscopic image display apparatus accumulates the information S based on the information S. Select what happens when the intensity reaches a threshold.

  Next, a method for correcting the stereoscopic strength and the threshold value in the stereoscopic image display apparatus will be described. In the above-described method, even when the same stereoscopic image is displayed by display means having different characteristics (display size, observation distance, etc.), the same stereoscopic intensity and threshold value are used regardless of the characteristics. However, since the influence on the eyes of the observer is considered to increase as the display size increases, or as the observation distance decreases, it is preferable to correct the stereoscopic strength and the threshold according to the characteristics of the display means. . For example, as the stereoscopic intensity and threshold value stored or transmitted together with the encoded data of the stereoscopic image, the optimum value (standard stereoscopic intensity) for display means having standard characteristics such as standard display size and standard observation distance is used. , The standard threshold value), and each display device corrects the standard solid intensity and the standard threshold value based on the characteristics of each display means.

In order to perform such correction, the correction unit 2506 shown in FIG. 25B is connected to the input portion of the display control unit 2501 in the stereoscopic image display apparatus shown in FIG. The correction means 2506 corrects the standard solid intensity (In) and the standard threshold value (THn), and outputs the corrected solid intensity (I) and threshold value (TH). I and TH are generally I = G (In)
TH = H (THn)
As described above, the correction functions G and H are given according to the characteristics of the display means. The correction function is, for example,
G (In) = N1 · In + N2
H (THn) = N3 · THn + N3
It can be expressed by a linear function such as However, N1 to N3 are values obtained by experiments or the like. More simply, only THn is corrected,
I = In
TH = N · THn
In this way, I and TH may be obtained, or conversely, only In may be corrected.

  In the case of the above formula, the viewing distance of the display means provided in the display device is the same as the standard viewing distance. When the display size is larger than the standard display size, N is set to a value smaller than 1, and the display size is standard. When it is smaller than the display size, N is set to a value larger than 1.

  As described above, in the fourth embodiment, description has been made using two-viewpoint image data including left-eye image data and right-eye image data. However, as in the first embodiment, three or more viewpoints are included. It is clear that the fourth embodiment can be applied to multi-viewpoint image data.

The figure which shows the structure of the three-dimensional image display apparatus of the 1st Embodiment of this invention. The figure which shows an example of the structure of the plane image data by the three-dimensional image display apparatus of the 1st Embodiment of this invention, and its display method. The figure which shows an example of the production | generation of the stereo image data in case the display means 3 can only perform a stereo display, and its display method in the stereo image display apparatus of the 1st Embodiment of this invention. The figure which shows an example of the production | generation of the stereo image data by the stereo image display apparatus of the 1st Embodiment of this invention, and its display method. The flowchart explaining the processing operation of the stereoscopic image display by the stereoscopic image display apparatus of the 1st Embodiment of this invention. The figure which shows an example of the production | generation of the stereo image data by the stereo image display apparatus of the 1st Embodiment of this invention, and its display method. The figure which shows an example of the stereo image decoding means 500 which decodes the stereo image format data F1 of the 1st Embodiment of this invention. The figure which shows an example of the stereo image format data F1 of the 1st Embodiment of this invention. The figure which shows an example at the time of receiving the stereo image content of the 1st Embodiment of this invention by broadcast. The figure explaining an example of the flow of the stereo image format data F1 when a recording medium is used as a transmission path | route of the stereo image format data F1 of the 1st Embodiment of this invention. The figure explaining an example of the flow of the stereo image format data F1 at the time of using a network as a transmission path | route of the stereo image format data F1 of the 1st Embodiment of this invention. The figure which shows the structure of the stereo image display apparatus of 1st Embodiment in case the input image data in this invention are three. The figure which shows an example of preparation of the stereo image data of 1st Embodiment, and its display in case the input image data in this invention are three. The figure which shows the structure of the stereo image display apparatus of the 2nd Embodiment of this invention. The flowchart explaining the processing operation of the stereoscopic image display by the stereoscopic image display apparatus of the 2nd Embodiment of this invention. The figure which shows the structure of the three-dimensional image display apparatus of the 3rd Embodiment of this invention. The flowchart which shows operation | movement of the three-dimensional image display apparatus of the 3rd Embodiment of this invention. The figure which shows the parallax of a stereo image, and the appearance of an image. The figure which shows the example of the relationship between solid intensity | strength and permissible time of a stereoscopic display. It is a figure which shows the relationship between accumulation intensity and time. The figure which shows the other example of the relationship between solid intensity | strength and permissible time of a stereoscopic display. The figure which shows the example of the relationship between display time and accumulated intensity. The block diagram which shows the stereo image coding apparatus of 4th Embodiment. The block diagram which shows the stereo image decoding apparatus of 4th Embodiment. The block diagram which shows the three-dimensional image display apparatus of 4th Embodiment.

Explanation of symbols

1, 100, 203, 600: Stereoscopic image creation means 2: Frame memory 3: Display means 4, 101, 204, 205: Time measurement determination means 5: Parallax control means 6: Plane image creation means 10, 200, 604: Switch Control means 11, 12, 13, 14, 201, 601, 602, 603: Switch 102: Warning display control means 202: Mode switch control means 206: Power supply control means 300: Slit 301: Frame 500, 512, 523: Stereoscopic image Decoding unit 501: Stereo image control information analysis unit 502: Image data part decoding unit 504: Separation unit 510, 520: Stereo image encoding unit 511: Recording medium 521: BS data creation unit 522: Network 524: BS data decoding unit 2301 : Stereo image control information generating means 2302: Stereo image encoding means 23 3: Multiplexing means 2401: Demultiplexing means 2402: Stereo image control information analysis means 2403: Stereo image decoding means 2501: Display control means 2502: Stereo image creation means 2503: Plane image creation means 2504: Switch 2505: Display means 2506 : Correction means

Claims (1)

In a stereoscopic image display device that displays images according to the left and right eyes of an observer, stereoscopic image creation means for creating a stereoscopic image from a plurality of images, planar image creation means for creating a planar image from the plurality of images, and the stereoscopic image Display means for displaying a stereoscopic image created by the creating means or a planar image created by the planar image creating means,
When the stereoscopic image display time exceeds the first predetermined time, the power supply including at least the power supply of the display means is automatically shut off. After the power supply of the display means is automatically shut off, the time during which no stereoscopic image is displayed is A stereoscopic image display device that displays a planar image created by the planar image creation means on the display means when an operation to restore the shut-off power supply is performed before a predetermined time of 2 is exceeded .

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