JP2013102952A - Asthenopia measurement device, electronic appliance, asthenopia measurement method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure three-dimensional asthenopia with high accuracy.SOLUTION: An alternate frequency instruction part 13 of this asthenopia measurement device 1 changes an alternate frequency for changing over the display of three-dimensional images each having a different parallax from a low frequency to a high frequency, and instructs an image display control part 14 about the display by the changed alternate frequency. The image display control part 14 reads image data for making the three-dimensional image having the different parallax be displayed from an image database 12, changes over the image data by the alternate frequency instructed from the alternate frequency instruction part 13, and makes the image data be displayed on a display part 11. When an input part 15 receives an operation indicating that the image formation of the different three-dimensional image displayed on the display part 11 cannot be performed from a subject, a diagnostic part 16 acquires the alternate frequency when having received the operation. The image display control part 14 makes the content data of the three-dimensional image using a parallax amount corresponding to the alternate frequency acquired by the diagnostic part 16 be displayed on the display part 11.

Description

  The present invention relates to an eye strain measuring apparatus, an electronic device, an eye strain measuring method, and a program.

  The CFF (Critical Flicker Frequency) method is a measure of eye fatigue that can be used to discriminate between two luminance images when two different luminance images are alternately presented and the alternating frequency of the presentation is increased. And

  FIG. 5 is a diagram showing an eye strain measurement method using the CFF method. In the figure, a white pattern image with luminance α and a black pattern image with luminance β are alternately displayed (alternate display). When the alternating frequency is low, the subject can perceive that white patterns and black patterns are alternately displayed. However, when the alternating frequency is high, the subject cannot perceive that these images are displayed alternately, and perceives gray, which is a mixed color of white and black patterns. Therefore, the alternating frequency of the white pattern and the black pattern is gradually increased, and the alternating frequency to which the subject can identify the alternating display is used as a measure of eye strain.

  On the other hand, Patent Document 1 describes a technique for adjusting a 3D effect during 3D content playback based on a viewer's biological signal.

JP 2011-28633 A

In recent years, electronic devices that perform three-dimensional (3D) display are increasing. The 3D display uses the parallax between the image for the right eye and the image for the left eye, but viewing this 3D display can cause eyestrain. Since the above-mentioned CFF method includes eye fatigue factors other than the parallax, which is the main factor of 3D eye fatigue, the amount of parallax, which is the main factor of 3D eye fatigue, is temporarily adjusted based on the measurement value by CFF. However, it is not an appropriate adjustment for the subject.
Moreover, in patent document 1 mentioned above, respiration, a gravity center, a heartbeat, etc. are used as a biological signal for determining 3D sickness. However, since these change depending on the emotion (for example, feeling of excitement and tension) given to the subject by the contents of the 3D content, 3D eye fatigue cannot be accurately measured.

  The present invention has been made in view of such circumstances, and provides an eye strain measuring apparatus, an electronic device, an eye strain measuring method, and a program capable of measuring 3D eye strain with high accuracy. .

  In order to solve the above-described problems, the present invention changes a display unit that displays a three-dimensional image and an alternating frequency for switching display of a three-dimensional image having a different parallax, and instructs display using the changed alternating frequency. An alternating frequency instruction unit, an image display control unit that switches and displays a three-dimensional image with different parallax by the alternating frequency instructed from the alternating frequency instruction unit, and is displayed on the display unit from a subject. An input unit that receives an operation indicating that the three-dimensional image cannot be formed, and a diagnostic unit that acquires the alternating frequency when the input unit receives the operation by a subject. It is an eye strain measuring device.

  Further, the present invention is the above-described eye fatigue measurement apparatus, wherein the image display control unit displays the content data of a three-dimensional image using a parallax amount corresponding to the alternating frequency acquired by the diagnosis unit. It is displayed on the part.

  Moreover, this invention is an electronic device provided with the eye strain measuring apparatus mentioned above.

  The present invention also relates to an eye strain measurement method performed by the eye strain measurement apparatus, which is performed by an eye strain measurement apparatus including a display unit that displays a three-dimensional image and an input unit that receives an operation by a subject. An eye strain measurement method, wherein an alternating frequency instruction unit changes an alternating frequency for switching display of three-dimensional images having different parallaxes, and an alternating frequency instruction step for instructing display using the changed alternating frequency, and image display An image display control step in which a control unit switches a three-dimensional image having a different parallax to be displayed on the display unit according to the alternating frequency instructed in the alternating frequency instruction step, and a diagnosis unit displays the display unit on the display unit. A diagnostic step for obtaining the alternating frequency when the input unit receives an operation indicating that the three-dimensional image cannot be formed. It is eyestrain measurement method according to claim.

  The present invention also includes a display unit that displays a three-dimensional image and an input unit that receives an operation performed by a subject, and uses a computer used as an eye strain measurement apparatus with an alternating frequency for switching display of a three-dimensional image with different parallax. An alternating frequency instruction unit for instructing display based on the changed alternating frequency, and an image display for switching the three-dimensional image having different parallax to be displayed on the display unit according to the alternating frequency instructed from the alternating frequency instruction unit The control unit functions as a diagnostic unit that acquires the alternating frequency when the input unit receives an operation indicating that the three-dimensional image displayed on the display unit from the subject cannot be formed. It is a program.

  According to the present invention, it is possible to accurately measure 3D eye strain.

It is a block diagram which shows the structure of the eye strain measuring apparatus by one Embodiment of this invention. It is a figure which shows the image data by the embodiment. It is a figure which shows the operation | movement outline | summary of the eye strain measuring apparatus by the same embodiment. It is a figure which shows the processing flow of the eye strain measuring apparatus by the same embodiment. It is a figure which shows the eye strain measurement method using CFF method.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of an eye strain measurement apparatus 1 according to an embodiment of the present invention, and only functional blocks related to the present embodiment are extracted and shown. The eye strain measuring device 1 is mounted on an electronic device such as a television receiver, a mobile phone, a computer terminal, a display device, and a game machine. As shown in the figure, the eye strain measuring apparatus 1 includes a display unit 11, an image database 12, an alternating frequency instruction unit 13, an image display control unit 14, an input unit 15, and a diagnosis unit 16.

The display unit 11 is a display that displays a 3D (three-dimensional) image (stereoscopic image). The image database 12 stores image data for displaying 3D images with different parallaxes. The alternating frequency instruction unit 13 changes the alternating frequency for switching the display of 3D images with different parallaxes, and instructs the image display control unit 14 to display an alternating 3D image at the changed alternating frequency. The image display control unit 14 reads out image data of 3D images having different parallaxes from the image database 12, switches these image data according to the alternating frequency instructed from the alternating frequency instruction unit 13, and causes the display unit 11 to display the image data.
The input unit 15 is an interface that receives input from the subject, and is, for example, a button or a key. The input unit 15 receives an operation indicating that a different three-dimensional image displayed on the display unit 11 cannot be formed from the subject. The diagnosis unit 16 acquires the alternating frequency when the input unit 15 receives an operation by the subject from the alternating frequency instruction unit 13.

  Each of the display unit 11 and the input unit 15 may use a display provided in an electronic device in which the eye strain measuring apparatus 1 is mounted, or a user input interface. The image database 12 may use a memory of an electronic device in which the eye strain measurement apparatus 1 is mounted.

  FIG. 2 is a diagram illustrating an example of image data stored in the image database 12. As shown in the figure, the image database 12 stores image data A for displaying a 3D image with parallax a and image data B for displaying a 3D image with parallax b. For example, the image data A is 3D image data for displaying a cube, and the image data B is 3D image data for displaying the same cube behind the image data A.

  FIG. 3 is a diagram showing an outline of the operation of the eye strain measuring apparatus 1. As shown in the figure, the eye strain measuring apparatus 1 alternately displays a 3D image of parallax a and a 3D image of parallax b. When the alternating frequency is low, the subject can perceive that the cube moves back and forth. However, when the alternating frequency is increased, the subject is mixed with parallax and cannot image a moving cube. The frequency at which this alternating 3D image can be perceived decreases as the 3D eye fatigue level of the subject increases. Therefore, the eye strain measuring apparatus 1 gradually increases the alternating frequency of 3D image display. The frequency at which the subject can no longer perceive the alternation is used as an index representing the subject's 3D eye strain.

FIG. 4 is a diagram showing a processing flow of the eye strain measuring apparatus 1.
In the figure, first, the image display control unit 14 reads out image data A and image data B from the image database 12 as image data of 3D images having different parallaxes (step S11). The alternating frequency instruction unit 13 generates an initial alternating frequency, and instructs the image display control unit 14 to display a 3D image using the generated alternating frequency (step S12). The image display control unit 14 switches the 3D image of the image data A and the 3D image of the image data B according to the alternating frequency instructed from the alternating frequency instruction unit 13 to display (alternate display) on the display unit 11 (step S13). ).

  When the input unit 15 does not receive an input indicating that a 3D image cannot be formed from the subject until a predetermined time has elapsed after the current alternating frequency is generated (step S14: NO), the alternating frequency instruction unit 13 A new alternating frequency higher than the current alternating frequency by a predetermined amount is generated. When the alternating frequency instruction unit 13 instructs the image display control unit 14 to display a 3D image at the newly generated alternating frequency (step S15), the eye strain measurement apparatus 1 repeats the processing from step S13.

  In step S14, when the input unit 15 receives an input indicating that a 3D image cannot be formed from the subject before a predetermined time has elapsed since the current alternating frequency is generated (step S14: YES), The diagnosis unit 16 acquires the alternating frequency when the operation is received from the alternating frequency instruction unit 13 (or the image display control unit 14) (step S16). The acquired alternating frequency is an index value of 3D eye strain of the subject.

  The eye strain measurement device 1 outputs a 3D eye strain degree based on the alternating frequency acquired by the diagnosis unit 16. For example, the diagnosis unit 16 displays the image data that displays the alternating frequency acquired in step S16 or the image data that displays the degree of 3D eye strain determined in advance according to the acquired alternating frequency as the image display control unit 14. Output to. The image display control unit 14 displays the image data input from the diagnosis unit 16. Thereby, the subject can know his or her 3D eye strain.

The eye strain measuring apparatus 1 may adjust and display a parameter for displaying 3D content, for example, the amount of parallax, based on the alternating frequency acquired by the diagnosis unit 16. For example, the diagnosis unit 16 stores in advance the relationship between the alternating frequency and the amount of parallax, and uses this relationship to determine a larger amount of parallax as the alternating frequency is higher, and determines a smaller amount of parallax as the alternating frequency is lower. To do. The diagnosis unit 16 outputs the determined amount of parallax to the image display control unit 14. The image display control unit 14 reads out the content data of the 3D image using the parallax amount input from the diagnosis unit 16 from a storage unit (not shown) or receives it from the outside, and displays it on the display unit 11.
Alternatively, the image display control unit 14 generates image data according to the amount of parallax input from the diagnosis unit 16 based on content data acquired by reading from a storage unit (not shown) or receiving from the outside, The generated image data may be displayed on the display unit 11.

  The eye strain measuring apparatus 1 may adjust image display adjustment parameters other than the parallax amount, such as brightness, contrast, color, and sharpness. In this case, the diagnosis unit 16 stores a relationship between the alternating frequency and the image display adjustment parameter in advance, determines an image display adjustment parameter corresponding to the alternating frequency from this relationship, and outputs the image display adjustment parameter to the image display control unit 14. . The image display control unit 14 causes the display unit 11 to display content data such as a 3D image in accordance with the image display adjustment parameter input from the diagnosis unit 16.

  In the above, the eye strain measuring apparatus 1 gradually increases the alternating frequency of the 3D image, but conversely, the alternating frequency of the 3D image is gradually decreased so that the subject can perceive the alternating display. The frequency (or the frequency immediately before the alternating display can be perceived) may be used as an index representing 3D eye strain of the subject.

In the above, the image display control unit 14 alternately displays the image data of two 3D images having different parallaxes. However, the image data of three or more 3D images having different parallaxes are displayed from the alternating frequency instruction unit 13. It may be switched on the indicated alternating frequency and displayed on the display unit 11.
Further, one of the image data of 3D images with different parallaxes to be displayed alternately may be image data for displaying parallax “0”, that is, a 2D (two-dimensional) image.

In this embodiment, the parallax that contributes most to 3D eye fatigue is used, and the “imaging force” in which the biological influence level is most likely to appear is measured. Therefore, the 3D eye fatigue level can be accurately measured. .
In the conventionally used CFF method, two different luminance images are alternately displayed, and when the alternating frequency is increased, the extent to which the two luminances can be distinguished is used as a measure of eye strain. However, since 3D eye fatigue is mainly affected by parallax, it is more accurate to use images with different parallax as in this embodiment than to use images with different brightness as in the CFF method. Since it can be extracted, it is suitable for 3D eye strain measurement. That is, while the CFF method handles luminance identification, the present embodiment observes parallax imaging, so it can be said that the amount of parallax, which is a main factor of 3D eye strain, is indirectly quantified. Therefore, when displaying the 3D content, the 3D parameter such as the amount of parallax is adjusted based on the alternating frequency that is the value of the 3D eye strain measured in this embodiment, so that the subject is more accurate than the CFF method. 3D image display can be adjusted.

  The aforementioned eye strain measuring apparatus 1 has a computer system inside. The operation processes of the alternating frequency instruction unit 13, the image display control unit 14, and the diagnosis unit 16 are stored in a computer-readable recording medium in the form of a program, and the computer system reads and executes this program. Thus, the above process is performed. The computer system here includes a CPU, various memories, an OS, and hardware such as peripheral devices.

Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

DESCRIPTION OF SYMBOLS 1 Eye strain measuring apparatus 11 Display part 12 Image database 13 Alternating frequency instruction | indication part 14 Image display control part 15 Input part 16 Diagnosis part

Claims (5)

A display unit for displaying a three-dimensional image;
Changing the alternating frequency for switching the display of three-dimensional images with different parallaxes, and an alternating frequency instruction unit for instructing display with the changed alternating frequency;
An image display control unit that switches a three-dimensional image with different parallax to be displayed on the display unit according to the alternating frequency instructed from the alternating frequency instruction unit;
An input unit that receives an operation indicating that the three-dimensional image displayed on the display unit from the subject cannot be imaged;
A diagnostic unit for acquiring the alternating frequency when the input unit receives the operation by a subject;
An eye strain measuring apparatus comprising: The image display control unit causes the display unit to display content data of a three-dimensional image using a parallax amount corresponding to the alternating frequency acquired by the diagnosis unit;
The apparatus for measuring eye strain according to claim 1.   An electronic apparatus comprising the eye strain measuring apparatus according to claim 1. An eye strain measurement method executed by an eye strain measurement apparatus including a display unit that displays a three-dimensional image and an input unit that receives an operation by a subject,
An alternating frequency instruction unit for changing an alternating frequency for switching display of a three-dimensional image with different parallax, and an alternating frequency instruction step for instructing display by the changed alternating frequency;
An image display control step, wherein the image display control unit causes the display unit to switch and display a three-dimensional image having a different parallax according to the alternating frequency instructed in the alternating frequency instruction step;
A diagnostic step for obtaining the alternating frequency when the input unit receives an operation indicating that the diagnostic unit cannot form the three-dimensional image displayed on the display unit from a subject;
A method for measuring eye strain characterized by comprising: A computer that includes a display unit that displays a three-dimensional image and an input unit that receives an operation by a subject, and is used as an eye strain measuring device.
An alternating frequency instruction unit that changes the alternating frequency for switching the display of three-dimensional images with different parallax, and instructs the display with the changed alternating frequency;
An image display control unit configured to switch and display a three-dimensional image having different parallax on the display unit according to the alternating frequency instructed from the alternating frequency instruction unit;
A diagnostic unit for acquiring the alternating frequency when the input unit receives an operation indicating that the three-dimensional image displayed on the display unit from the subject cannot be imaged;
A program characterized by functioning as

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