JP5098739B2 - Simulation device, simulation program, and recording medium recording simulation program - Google Patents

Description

  The present invention relates to a simulation apparatus for simulating the appearance of a lens, a simulation program, and a recording medium recording the simulation program.

In recent years, simulation apparatuses are used according to various applications. For example, a virtual person moves through a structure such as a house in a virtual space to simulate the appearance of the room at various positions and directions in the house, the temperature distribution by an air conditioner, etc., and the effects of lighting fixtures. A simulation system for experiencing is proposed (Patent Document 1). This method of simulated experience with movement is called walk-through.
In this patent document 1, the distance from the virtual viewpoint to the observation object toward the binocular line of sight is calculated each time, following the virtual viewpoint moving in the virtual space, and the calculated distance and the set left and right From the distance between both eyes, an image with the left and right eyes with parallax is calculated. The parallaxed images are made to be simulated by a three-dimensional image by causing the left and right eyes of the observer to visually recognize the images with the parallax.

In addition, a simulation device that simulates the state of wearing a spectacle lens has also been proposed (Non-Patent Document 1).
A conventional example of Non-Patent Document 1 will be described with reference to the conceptual diagram of FIG. In FIG. 11, a virtual viewpoint P is placed in front of the spectacle lens L, the virtual observation object O is viewed from the virtual viewpoint P, and a straight line LD connecting the virtual viewpoint P and the virtual observation object O and the visual axis LP Is defined as θ, and the angle formed between the straight line LA connecting the point on the spectacle lens L between the straight line LD and the visual axis LP and the X axis LX passing through the lens optical axis LC of the spectacle lens L is defined as α.
In Non-Patent Document 1, first, ray tracing through the lens L from the virtual viewpoint P to each direction (α, θ) and each distance D of the visual field is first performed. Calculates optical properties such as prism action, power error, astigmatism, etc. when passing through the lens L, and further calculates the far point and near point from the eye's adjustment power, and then the lens defocus amount at that position Is calculated comprehensively. Then, the lens defocus amount is registered as lens visual characteristic data by the lens L at each position (direction and distance) in the visual field space. During walk-through, an image is created by determining which direction in which direction the object is located and synthesizing multiple displays while displacing the object based on the characteristic data registered in the position of the visual field space. To do.

JP 7-73338 A (FIGS. 7 and 8) "Display of refractive correction results using vertex-based ray tracing" Information Processing Society of Japan Research Report, 2006-CG-124 (5), pp.25-30 (August 2006)

In Patent Document 1, there is the following problem in performing a simulated experience of spectacle lens optical characteristics.
When the spectacle lens is worn, as shown in FIG. 12, the position where the line of sight passes through the spectacle lens differs when looking at a distant object and when viewing a close object. For example, as shown in FIG. 12A, in the case of far vision, the center portion of the lens centering on the optical axis LC of the spectacle lens L is the center of the visual field. On the other hand, as shown in FIG. 12B, in the case of near vision, the visual axis LP is directed to the target, that is, there is eye convergence, and the line of sight passes through the nose side of the left and right eyeglass lenses L. The center of the field of view on the lens moves to the nose side for both the left and right lenses.

  Unlike the central part of the lens centered on the optical axis LC, the spectacle lens L has optical characteristics such as astigmatism, power error, distortion, etc. in the peripheral part of the lens. In the case of performing visual simulation through, it is required to faithfully reproduce them. In particular, a progressive-power lens has an area called a distance portion that looks far away in the lens, a region called a near portion that looks near, and an intermediate portion that looks at an intermediate distance located in the middle or an area called a progressive portion The lens partially has relatively large astigmatism, distortion, and power change. Therefore, in the progressive-power lens, a simulation that takes this convergence into consideration is particularly important.

In visual simulation, it is necessary to consider eye adjustment. That is, the human eye looks at the distance or near by changing the refractive power of the lens in the eye. The longest distance that can be seen by the adjustment is called the far point, the shortest distance is called the near point, and the distance between the far point and the near point can be clearly seen. A presbyopic patient who needs a progressive power lens loses the accommodation power of this eye, so the distance between the far point and the near point approaches.
Therefore, when performing a visual simulation of a presbyopic patient, it is not only that what is seen in which direction, but also if it is out of the range of the far and near points of adjustment. Then, it will not be an accurate simulation without a simulation of how far it is off and how blurry it looks.

The conventional walk-through simulation with binocular vision is for the purpose of experiencing the structure in the building spatially, so simply determine what is in each direction of the field of view with the left and right eyes. Just simulate about. Therefore, it is not a visual simulation that takes account of eye accommodation.
Furthermore, as a visual simulation with binocular vision wearing a spectacle lens, the position of the spectacle lens that passes through the eye as described above, the prism effect due to refraction, power error, etc. -It is necessary to calculate how the line of sight is bent by the occurrence of astigmatism and how the object looks blurred.
Such a simulation is obtained by calculating by the ray tracing method in each situation, but in the conventional thing without an intermediate that refracts the line of sight of a spectacle lens, it is calculated in accordance with the speed of the walkthrough in almost real time. Although it may be possible to display as an image, in order to simulate the optical characteristics of the spectacle lens, it is necessary to perform innumerable ray tracing in the vicinity of the line of sight in that direction, and enormous processing time is required. Therefore, real-time processing that walks through the virtual space or quickly moves the direction of the line of sight to experience the shaking of the progressive-power lens is difficult.

In Non-Patent Document 1, every time the line of sight moves in the walk-through, the ray tracing for obtaining the optical characteristics by the lens is not necessary, so that the calculation can be shortened. However, when the eye adjustment condition changes and the convergence changes. The visual field position on the lens changes, and the lens visual characteristic data must be recalculated each time.
Therefore, even in Non-Patent Document 1, it is difficult to make a real-time simulated experience.

  The present invention provides a simulation apparatus, a simulation program, and a recording medium on which the simulation program is recorded, which enables visual simulation of binocular vision using a spectacle lens in real time and enables a pseudo experience of how the eyeglass looks when wearing glasses. For the purpose.

The simulation apparatus of the present invention includes design data acquisition means for acquiring lens design data relating to lens design items, lens design means for designing a lens based on the lens design data, and data corresponding to the eyesight of a spectacle wearer. Image data acquisition means for acquiring, image data generation means for generating image data based on the data acquired by the image data acquisition means, and image data generated by the image data generation means via the processed lens An image processing unit that indicates a viewing state; a display unit that displays processed image data created by the image processing unit; and a recording unit that records visual characteristic data corresponding to a parallax condition in advance. The data creating means includes a dividing step of dividing the virtual visual field space into at least two according to the distance from the virtual starting point, and the dividing process. In a parallax condition setting step of setting a predetermined distance parallax conditions corresponding one of the divided virtual viewing space, the object viewing distance determination step of determining a target viewing distance by adjusting the eye of the spectacle wearer, this purpose vision A parallax condition determining step for determining a parallax condition from the target viewing distance determined in the distance determining step, and visual characteristic data corresponding to the parallax condition determined in the parallax condition determining step are read from the recording unit, and the read visual And an image creation step of creating a binocular vision simulation image of the object in the virtual visual field space through the spectacle lens using the characteristic data .

According to the present invention, the simulation apparatus acquires lens design data relating to lens design items by the lens design means, and acquires data corresponding to the eyesight of the spectacle wearer by the image data acquisition means. Then, the image data creating means creates image data based on the data obtained by the image data obtaining means.
The image data creation means performs each of the division process, the parallax condition determination process, the target viewing distance determination process, the parallax condition determination process, and the image creation process.
That is, the virtual visual field space is divided into at least two according to the distance from the virtual start point, and the parallax condition corresponding to a predetermined distance is determined in the divided virtual visual field space. Further, the target viewing distance is determined by adjusting the eye of the spectacle wearer, the parallax condition is determined from the determined target viewing distance, and both of the objects in the virtual visual field space through the spectacle lens are determined based on the determined parallax condition. Create a visual simulation image.
Based on the binocular vision simulation image, the image processing means creates a state viewed through the processed lens and displays the processed image data on the display means.

In the present invention, the image data creation means sets a plurality of parallaxes in advance and selects an appropriate parallax according to the target viewing distance, thereby simplifying the calculation of the lens visual characteristics based on the parallax.
Therefore, it is possible to shorten the image processing time and to realize a real-time simulated experience.

In the simulation apparatus of the present invention, the dividing step includes two boundaries between approximately 1 m and 2 m and approximately 40 cm to 1 m, and the virtual visual field space is divided into three at a long distance, a medium distance, and a short distance. Is preferred.
According to the present invention, since the boundary that divides the long distance, the medium distance, and the short distance into three is a dimension that is a standard in designing a normal spectacle lens, a preferable spectacle lens can be designed.
That is, in general, the refraction power of the spectacle lens or the eye uses the reciprocal of the focal length, and when using a small adjustment, for example, an adjustment from 0.5D to 1.0D, from a normal vision state where the far point is at infinity. The focal point moves to 2 m and 1 m, respectively. With medium adjustment 2.0D, the focus position is 0.5m, and with relatively large adjustment 3.0D, the focus moves to 0.33m.
Therefore, by dividing the virtual space by the distance according to the amount of the eye adjustment force, a spectacle lens suitable for the spectacle user is obtained.

In the simulation apparatus of the present invention, in the target viewing distance determination step, the determination of the target viewing distance by adjusting the eye of the spectacle wearer specifies an observation object in a virtual visual field space on the display screen of the display means. The structure determined by is preferable.
According to the present invention, an observation object corresponding to a short distance on the display screen (for example, a front spread book), an observation object corresponding to a medium distance (for example, a personal computer), and an image object corresponding to a long distance. The distance corresponding to the short distance is determined only by designating one of the objects (for example, the window in the back), for example, the observation object corresponding to the short distance.
Therefore, the image processing time can be further shortened, and a real-time simulated experience can be achieved.

In the simulation apparatus of the present invention, it is preferable that the lens is a progressive addition lens having a progressive surface.
In the simulation apparatus of the present invention, it is possible to have a real-time pseudo-experience in a progressive power lens that includes a distance portion, an intermediate portion, and a near portion according to the distance of an object, and the appearance differs depending on these regions. .

The simulation program of the present invention is characterized in that the calculation means functions as the aforementioned simulation apparatus.
According to the present invention, since the calculation means can function as the above-described simulation device by the simulation program, as described above, the spectacle user can execute a real-time simulated experience in a short time.

The recording medium on which the simulation program of the present invention is recorded is characterized in that the above-described simulation program is recorded so as to be readable by the calculation means.
According to the present invention, since the simulation program as described above is recorded on the recording medium so as to be readable by the calculation means, the calculation program is read by the calculation means by causing the calculation means to read the recording medium. Can be implemented.

Hereinafter, a simulation apparatus according to an embodiment of the present invention will be described with reference to the drawings.
[Configuration of simulation device]
FIG. 1 shows a schematic configuration of a simulation apparatus 1 according to the present embodiment.
The simulation apparatus 1 is installed, for example, at a spectacle lens store.
In the present embodiment, the simulation apparatus 1 is exemplified by a personal computer, but is not limited thereto, and other calculation means such as a portable telephone device may be used.
As shown in FIG. 1, the simulation apparatus 1 includes an input unit 12, a display unit 13 as a display unit, a recording unit 14 as an image recording unit, a memory 15, a processing unit 16, and the like. .

The input unit 12 includes, for example, various operation buttons and operation knobs (not shown) that are input and operated with a keyboard, a mouse, or the like.
These input operations such as operation buttons and operation knobs are setting input for setting items such as setting of operation contents of the simulation apparatus 1 and setting of information stored in the simulation apparatus 1.
Then, the input unit 12 appropriately outputs a signal corresponding to the setting item to the processing unit 16 to perform setting input by an input operation of the setting item.
Note that the input operation is not limited to operation of operation buttons, operation knobs, and the like, and may be configured to input various setting items by, for example, input operation using a touch panel provided on the display unit 13 or input operation using voice. Good. For example, as an input operation, a dialog box may be displayed on the screen and an input operation may be performed on this dialog box. The dialog box may be displayed at the corner of the screen, but is preferably displayed at the center of the screen in consideration of operability.

The display unit 13 is controlled by the processing unit 16 and causes the image information signal input from the processing unit 16 to be displayed on a display area (not shown).
As the display unit 13, for example, a head-mounted 3D display device that displays an image with parallax between the left and right eyes, or a liquid crystal that is displayed in front of the left and right eyes by alternately displaying left and right images with parallax on a flat display. By alternately opening and closing the panel shutter in synchronization, the left and right images are recognized by the left and right eyes, respectively, or the left and right images with different parallax characteristics using polarized light are displayed and the polarization characteristics match. An example is a 3D display device that allows the right eye to recognize left and right images.

The recording unit 14 stores, for example, customer data, various data such as an original image to be simulated, the shape of a spectacle frame, and the like so as to be readable.
The recording unit 14 may have a configuration including a drive and a driver that are readable and stored in a recording medium such as an HD (Hard Disk), a DVD (Digital Versatile Disc), an optical disc, and a memory card.

Here, the customer data is data relating to the prescription of the lens ordered by the customer who is the spectacle wearer. This customer data is configured as one piece of data by associating customer ID data, prescription data, lens shape design data, and the like.
The lens design data of the present embodiment is constructed from the prescription data and the lens shape design data.

  The customer ID data is unique information for specifying customer data, and is information set for each customer data. Examples of the customer data include customer personal information related to a customer number and customer name set for each customer.

The prescription data is data relating to customer vision of the customer data specified in the customer ID data and lens prescription. In this prescription data, visual data relating to the customer's vision, lens prescription data relating to the prescription of the lens to be designed, and the like are recorded.
In the visual data, for example, information related to the visual perception of the customer's naked eye, such as the visual acuity of the customer and the presence or absence of astigmatism, is recorded. In the lens prescription data, data relating to the lens power, addition power, spherical power, astigmatism power, astigmatism axis, prism power, near inset amount, and the like are recorded.

  The lens shape design data is data related to the shape of the lens. For example, the refractive index and Abbe number of the lens material, the coordinate value data of the lens refracting surface (front surface and rear surface), the thickness data such as the lens center thickness, and the data related to the design parameters such as the progressive zone length are recorded. In addition, data of refractive action (refractive power, prism action, etc.) at each point on the lens can be included.

The memory 15 stores setting items input by the input unit 12, audio information, image information, and the like so as to be appropriately read out. Further, the memory 15 stores various programs developed on an OS (Operating System) that controls the operation of the entire simulation apparatus 1. This program includes a program for creating a binocular image under the long-distance, middle-distance, and short-distance parallax conditions described later. This program can illustrate the program which performs the method shown by the nonpatent literature 1, for example.
Note that the memory 15 may be configured to include a drive, a driver, and the like that are readable and stored in a recording medium such as an HD, DVD, or optical disc.

The processing unit 16 is connected to various input / output ports (not shown) such as a key input port to which the input unit 12 is connected, a display port to which the display unit 13 is connected, a storage port to which the recording unit 14 is connected, and a memory 15. It has a memory port.
The processing unit 16 includes, as various programs, a data acquisition unit 161, a data creation unit 162, and the like as shown in FIG.

The data acquisition unit 161 recognizes an input signal generated by an input operation performed by the user on the input unit 12 and acquires various data based on the input signal. The data acquisition unit 161 acquires various data from the recording unit 14.
The data acquisition unit 161 includes a design data acquisition unit 163 that acquires lens design data, an image data acquisition unit 164 that acquires an image such as image data corresponding to a customer's vision, and a frame shape acquisition that acquires the shape of a spectacle frame. Means 165.

The data creation unit 162 creates new data from various data acquired by the data acquisition unit 161.
The data creation means 162 is an image data creation means 166 that creates image data based on the data acquired by the image data acquisition means, and a lens that designs a lens (design lens) before the lens processing based on the lens design data. And a design unit 167 and an image processing unit 168 that creates processed image data indicating a state in which the image data is viewed through a processed lens obtained by subjecting the design lens to a target lens shape.

[Operation of simulation device]
Hereinafter, the operation of the simulation apparatus 1 will be described with reference to FIGS.
In the present embodiment, the lens is a progressive power lens having a progressive surface.

FIG. 2 is a flowchart showing the overall operation of the simulation apparatus 1.
In FIG. 2, first, a lens design step S110 is performed. In this step, the design data acquisition unit 163 reads lens design data from the recording unit 14, and the lens design unit 167 designs a lens (design lens) before target lens processing based on the read lens design data. The designed lens is stored in the recording unit 14 in a format such as three-dimensional coordinate value data on the object side and the eyeball side.
When this lens design process is completed, the process proceeds to an image data creation process S111.
The specific procedure of this image data creation step S111 is described in FIGS.
The image data creation step S111 is divided into a pre-step and a main step, FIG. 3 is a flowchart of the pre-step of the image data creation step, and FIG. 4 is a flowchart of the main step of the image data creation step.
In FIG. 3, first, the data creation means 162 takes in various data from the recording unit 14 and the memory 15 and divides each virtual visual field space according to the distance (S11). That is, the virtual visual field space that extends from the virtual viewpoint to the eyes is divided into at least two or more according to the distance from the virtual viewpoint, in this embodiment, three.

FIG. 5 is a conceptual diagram for explaining that the virtual visual field space is divided into three.
In FIG. 5, a virtual viewpoint P ₀ is set at the midpoint between the left and right eyes I, and a virtual visual field space extending from the virtual viewpoint P ₀ through the spectacle lens L to the front of the face is divided into three distances, a long distance, a medium distance, and a short distance. Divide into spatial boundaries S1, S2, S3. This division is performed according to the amount of eye accommodation.
In general, since the reciprocal of the focal length (unit: diopter, hereinafter referred to as D) is used as the refractive power of the spectacle lens or the eye, small adjustments, for example, 0. With adjustments from 5D to 1.0D, the focal point moves to 2m and 1m respectively. With medium adjustment 2.0D, the focus position is 0.5m, and with relatively large adjustment 3.0D, the focus moves to 0.33m. Specifically, when the virtual visual field space is divided into a long distance, a medium distance, and a short distance, there are two boundaries, R1 between approximately 1 m and 2 m and R2 between approximately 40 cm and 1 m.

Returning to FIG. 3, the parallax condition corresponding to the distance representing the divided virtual visual field space is determined (S12). The parallax condition is the distance between both eyes and the target viewing distance.
FIG. 6 is an explanatory diagram schematically showing parallax conditions.
6, the boundary R1 between long distance and medium distance from the virtual viewpoint _{P 0} 1.5 m, a medium range and short-range boundary R2 and 40cm from a virtual viewpoint _{P 0,} the short-range space in FIG. 6 (A) as the distance representing the region, for example, is set to 30cm the desired viewing distance Q from the virtual viewpoint P _0. In FIG. 6B, the target viewing distance Q representing the middle distance space is set to 1 m. In FIG. 6C, the target viewing distance Q representing the long-distance space is set to 4 m. The distance D between the rotation centers of both eyes I is 62 mm at any distance.

Next, using the spectacle lens data, the visual characteristic data representing the effect on the appearance when viewed through the spectacle lens in the parallax conditions of the long distance, medium distance, and short distance space space area Register in association with. These are stored as a database in the storage device.
Therefore, as shown in FIG. 3, the data creation unit 162 calls the parallax condition data from the recording unit 14 (S13), calculates the parallax characteristics according to each parallax condition (S14), and creates a parallax characteristic database under each parallax condition. (S15).

A method for creating a visual characteristic database will be described with reference to FIG.
FIGS. 7A and 7B schematically show visual characteristic data when an attempt is made to look at a specific viewing distance Q with the naked eye and the spectacle lens worn, respectively. These figures show a plane including a straight line connecting the rotation centers of the left and right eyeballs in the virtual visual field space shown in FIG. 5 and having a certain elevation angle or dip angle with respect to the line of sight as viewed from the horizontal front. On this plane, the amount of blurring of the image on the retina at each distance in the direction of each line of sight when attempting to see the target viewing distance Q is represented by the size of an ellipse. In the figure, two lines are shown: a front line of sight and a side line of sight. The amount of blur is calculated by the ray tracing method using the prescription of the wearer's eye and lens design data.

In the case of the naked eye in FIG. 7A, if there is no astigmatism in the eye and the target viewing distance Q is within the range of the eye accommodation power, there is almost no blur at the target viewing distance Q as shown in this figure. In other words, it is in focus. It shows that the amount of blur increases as you move back and forth. The figure shows the amount of blur at each position for two lines of sight looking toward the front and looking toward the side. In the case of the naked eye, it depends only on the distance from the viewpoint and does not change in any direction.
In the case of wearing the lens of FIG. 7B, if the target viewing distance Q is within the adjustable range of the eye taking into account the refractive power of the lens L in the front line of sight, the focus is as shown in the figure at the target viewing distance Q. Fit. However, the effect of lens optical performance appears in the line of sight toward the side.
In general, astigmatism occurs on the side of the lens away from the optical axis of the lens L, and the amount of blur increases. In particular, in the progressive-power lens, since there is a relatively large astigmatism on the side of the progressive zone, the amount of blur is significantly increased.
In the examples of FIGS. 7A and 7B described above, the case where the focus is achieved at the target viewing distance Q is illustrated, but depending on the condition of the eye or the lens L, a clear focus may not be achieved. In that case, the blur amount at each position is defined under the condition that the blur amount at the target viewing distance Q is minimized within the range of these conditions.

These calculations are performed over the entire virtual visual field space by changing the elevation angle or the dip angle for each constant angle. Then, a three-dimensional blur amount map is completed in the virtual visual field space. This map is the amount of blur associated with each point of the spatial grid by angle, but for the points in the space between those grid points, the blur amount for all spatial points is determined by the commonly used interpolation method. Can be calculated.
By the above-described method, the representative target viewing distance is set in the divided virtual visual field space for each of the left and right eyes and the left and right eyeglass lenses, and the respective visual characteristic data is obtained. Further, visual characteristic data corresponding to each parallax condition is completed by adding an offset of the visual field center as shown in FIG. 6 from the parallax based on the target viewing distance and the distance between the left and right eyes. It is stored in the recording unit 14 and used as a database.

Next, the procedure of this process for creating image data will be described based on the flowchart of FIG.
Here, an example of the observation target image shown in FIG. 8 will be described. FIG. 8 shows the image data captured by the image data acquisition means 164 in the virtual visual field space. FIG. 8A is a plan view, with the lower side of the figure being in front of the observer and the upper side being the back. . A book B, a personal computer P, a wall clock C and a window W placed on the desk from the front are arranged. FIG. 8B is a front view showing an image from the observer direction. Here, for the purpose of explanation, the data for the observation target space is shown using two drawings. Actually, however, the three-dimensional data indicating the shape and position of the object in the space and the characteristic value data of the surface constituting the object are shown. Obtained and recorded in the recording unit 14.

As a procedure for creating image data of the observation target space, first, a target viewing distance by adjusting the wearer's eyes is determined (S21). In this target viewing distance determining step S21, a selection screen may be displayed at one corner of the screen by assigning a viewing distance selection input function to a specific key of the operation keyboard constituting the input unit 12, but in this embodiment, An observation object on the screen displayed on the display unit 13, for example, a part of the personal computer P showing the middle distance area space S <b> 2 is designated with a mouse or the like, and the distance from the virtual viewpoint of the object is obtained as the target viewing distance.
That is, in the target viewing distance determination step S21, the determination of the target viewing distance by adjusting the wearer's eyes is calculated and determined by designating the observation object in the virtual visual field space on the display screen of the display unit 13. .

Next, it is determined whether the target viewing distance corresponds to any one of the short-distance area space, medium-distance area space, and long-distance area space in the previously set virtual visual field space (S22). For example, if the target viewing distance is 70 cm, it is determined that the target viewing distance is the middle-range area space S2 between the boundaries R1 and R2 (40 cm to 1.5 m), and the parallax condition when the target viewing distance is 1 m is selected. The If object viewing distance is 20 cm, it is determined to correspond to the short range space S3 between the virtual viewpoint P ₀ and the boundary R2, object viewing distance parallax condition when the 30cm is selected. If the target viewing distance is 5 m, it is determined that the target viewing distance corresponds to the long-distance region space S1, and the parallax condition when the target viewing distance is 4 m is selected.

  Then, the visual characteristic data recorded in advance according to the selected parallax condition is called from the recording unit 14, and all objects existing in the virtual visual field space of the virtual space are used to correspond to the virtual visual field space where it is located. Based on the visual characteristic data to be processed, blurring and distortion processing is performed to create an image having parallax between the left and right eyes (S24). Furthermore, the finally created left and right eye images are recorded in such a way as to be recognized separately for each eye (S25).

The display of the left and right eye images created in this way will be described with reference to FIGS. The following description will be made with respect to the left eye image, and the same will be omitted for the right eye image. 9 (A) is an example of an image when viewed medium distance in resulting naked eye image creation step S111 described above, which distance for the image data 51 and the refractive error of the wearer's eye presbyopia This indicates that this is an example of a blurred image. FIG. 9B shows image data 62 obtained by the lens when passing through a progressive-power eyeglass lens designed for correcting the refractive error and correcting for presbyopia, obtained as a result of the image creation step S111 described above. is there. In general, since a spectacle lens is designed in a circular shape, image data from the lens is also in a circular region, and a broken line 63 in the figure indicates a distance portion, an intermediate portion, and a near portion of a design lens that is a progressive power lens. , And a portion that cannot be used due to optical distortion (left and right of the lower part of the lens). The image data 62 by the lens has been subjected to image processing so that the appearance of the image differs from the broken line 63.
In this figure, the optical distortion is omitted, and only the blur due to the focal length is expressed.

Thereafter, the procedure returns to the procedure shown in FIG. In creating the display image, first, in the frame selection step S112, the customer operates the input unit 12 to select a spectacle frame. The frame shape acquisition unit 165 acquires the shape of the selected spectacle frame from the recording unit 14.
When the frame selection step S112 is completed, in the superimposition step S113 following the superposition step S113, the image data acquisition unit 164 adds the spectacle frame to the image data by the lens read from the recording unit 14, as shown in FIG. The frame image data 64 relating to the other image is superimposed.
In the subsequent extraction step S114, the image data acquisition unit 164 extracts the overlapped portion 65 of the lens image data 62 and the frame image data 64.

Next, in S115, it is selected whether or not the fitting step S116 is performed.
When the fitting step S116 is performed (YES is selected), the image data acquisition unit 164 fits the superimposed portion 65 at a corresponding position in the image data 51 as shown in FIG. In the display step S117, the display unit 13 completes the processed image data 70 from the image data 51 in which the overlapping portion 65 is fitted.

  In this way, the image for the left eye is created, and the image for the right eye is created using the data for the right eye by the same method. These are displayed on the 3D display device described above and perceived separately for the left and right eyes to be recognized as a three-dimensional image.

Here, when the target viewing distance is changed (S118), for example, when the target viewing distance is changed from the middle distance area space S2 to the far distance area space, the process returns to the target viewing distance determination step S21 again.
When changing from the middle-distance region space S2 to the long-distance region space S1, for example, when the user looks up from the personal computer P that is the observation object displayed on the display unit 13 and looks out of the window W, the display is displayed. By moving the cursor out of the window W on the displayed screen, the parallax condition is switched to the long-distance area space S1 and displayed.

[Effects of Embodiment]
According to the above embodiment, the following effects can be obtained.
(1) The image data creating unit 166 divides the virtual visual field space according to the distance from the virtual start point, and a parallax condition corresponding to a predetermined distance in the virtual visual field space divided in the division step S11 The parallax condition is set from the target viewing distance determined in the target viewing distance determining step S21, the target viewing distance determining step S21 in which the target viewing distance is determined by adjusting the eye of the spectacle wearer, and the parallax condition setting step S21. A parallax condition determining step S22 for determining and an image generating step S24 for generating a binocular vision simulation image of the object in the virtual visual field space through the spectacle lens according to the determined parallax condition are executed. Therefore, the image data creation unit 166 simplifies the calculation of the lens visual characteristic by the parallax by setting a plurality of parallax conditions in advance and selecting an appropriate parallax condition according to the target viewing distance. Real time simulated experience is possible by shortening the time.

(2) In the dividing step, the virtual visual field space is divided into the far-distance area space S1, the middle-distance area space S2, and the short-distance area space S3. A reduction in memory capacity can be achieved at the same time.
In particular, these region spaces are spaces partitioned by boundaries R1 and R2 provided between about 1 m and 2 m and between about 40 cm and 1 m, respectively. Since these dimensions are used as a standard in the design of a normal spectacle lens, a preferable spectacle lens can be designed.

(3) In the target viewing distance determination step S21, the determination of the target viewing distance by adjusting the eye of the spectacle wearer is calculated by the distance from the virtual viewpoint by designating the observation object in the virtual visual field space on the display screen. It is determined.
Therefore, an object to be observed in the virtual visual field space on the display screen, for example, an image of a spread book located in the short distance area space S3, an image of a personal computer located in the middle distance area space S2, or the far distance area space S1. In the image of the window that is positioned, for example, the distance corresponding to the short-distance region space S3 is determined only by designating the image of the spread book using a mouse or the like.
Therefore, the image processing time can be further shortened, and a real-time simulated experience can be achieved.

(4) Since the image processing means 168 performs the superimposing step S113 and the extraction step S114 and creates the processed image data 70 regarding the processed lens that has been processed into a lens shape corresponding to the spectacle frame, a specific spectacle frame is selected. The appearance of the lens when used can be evaluated.
Since the image processing unit 168 performs a series of processes after the lens design unit 167 designs the design lens before the target lens processing, the lens design process S111 that requires a long time is performed every time the spectacle frame is changed. There is no need to do.
Therefore, in the simulation apparatus 1 of the present embodiment, the shape of the spectacle frame can be changed in a short time, and the appearance of the lens by each spectacle frame can be easily compared.

(5) Since it is possible to confirm the appearance of the processed lens that has been processed into a lens shape according to the spectacle frame, the area of the distance portion, the intermediate portion, and the near portion of the progressive addition lens is determined for each spectacle frame. Can be confirmed in advance.
In particular, in this embodiment, since the boundary with the unusable part is displayed by the broken line 63, the change in the area of each region for each spectacle frame can be easily grasped.

[Modification of Embodiment]
In addition, this invention is not limited to embodiment mentioned above, The deformation | transformation shown below is included in the range which can achieve the objective of this invention.
For example, in the embodiment, the virtual visual field space is divided into three, that is, the long-distance area space S1, the medium-distance area space S2, and the short-distance area space S3. Is not to be done. For example, it may be divided into two, or may be divided into four or more. If it is finely divided into four or more, it is possible to perform a simulation with a more realistic view. However, as the number of divisions increases, the preprocessing time and the memory capacity of the recording unit 14 and the memory 15 for recording visual characteristic data increase, which increases the size of the apparatus. Therefore, the number to be divided needs to be selected according to the purpose.

  In the embodiment, the target viewing distance determination step S21 determines the target viewing distance by adjusting the eye of the spectacle wearer by designating the observation target in the virtual visual field space on the display screen. Although it is configured to be calculated and determined by the distance, in the present invention, another switching operation may be performed by the input means of the display unit 13.

In the embodiment, the end of the spectacle frame in the frame image data 64 or the like is displayed with a solid line, but such a solid line may not be displayed.
In addition, although the boundary between the distance portion, the intermediate portion, and the near portion of the progressive power lens and the portion that cannot be used due to optical distortion is indicated by a broken line 63, the broken line 63 may be omitted. If image processing is performed in different ways for each of the distance portion, the intermediate portion, and the near portion, the customer confirms the difference in the appearance due to the change in the area of each region even without the broken line 63. be able to.

  Furthermore, the present invention is not only configured as the simulation apparatus 1 as shown in the above-described embodiment, but also a simulation program for causing an arithmetic means such as a computer to function as the simulation apparatus 1, and the simulation program by the arithmetic means. It can also be configured as a recording medium such as a CD-ROM or a memory card recorded in a readable manner.

  In addition, the specific structure and procedure for carrying out the present invention can be appropriately changed to other structures and the like within a range in which the object of the present invention can be achieved.

Schematic which shows the structure of the simulation apparatus which concerns on one Embodiment of this invention. The flowchart which shows the operation | movement through the said embodiment whole. The flowchart of the pre-process of an image data creation process. The flowchart of this process of an image data creation process. The conceptual diagram explaining dividing a virtual visual field space into three. Explanatory drawing which shows a parallax condition typically. The figure which shows the creation method of visual characteristic data. The image data taken in by the image data acquisition means in the virtual visual field space is shown, (A) is a plan view, and (B) is a front view. (A) is a front view showing an example of an image when viewed at a medium distance with the naked eye obtained as a result of the image creation step, and (B) is a front view showing image data by the lens when viewed through a progressive-power eyeglass lens. Figure. FIG. 4 is a diagram for explaining display in the embodiment, in which (A) is a front view in which frame image data relating to an image of a spectacle frame is superimposed on image data, and (B) is a portion in which the superimposed portion is fitted at a corresponding position in the image data. The front view which shows a state. The conceptual diagram explaining a prior art example. The conceptual diagram for demonstrating the subject of a prior art example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Simulation apparatus, 13 ... Display part (display means), 14 ... Recording part, 51 ... Image data, 62 ... Image data by lens, 70 ... Processed image data, 163 ... Design data acquisition means, 164 ... Image data acquisition means 166: Image data creation means, 167: Lens design means, 168: Image processing means

Claims (6)

Design data acquisition means for acquiring lens design data relating to lens design items;
Lens design means for designing a lens based on the lens design data;
Image data acquisition means for acquiring data corresponding to the vision of the spectacle wearer;
Image data creating means for creating image data based on the data obtained by the image data obtaining means;
Image processing means showing a state in which the image data created by the image data creating means is viewed through the processed lens;
Display means for displaying the processed image data created by the image processing means;
Recording means in which visual characteristic data corresponding to the parallax condition is recorded in advance;
With
The image data creation means is configured to divide the virtual visual field space into at least two according to the distance from the virtual start point, and a parallax condition corresponding to a predetermined distance in the virtual visual field space divided in the division step. A parallax condition setting step for setting, a target viewing distance determination step for determining a target viewing distance by adjusting the eye of the spectacle wearer, and a parallax condition for determining a parallax condition from the target viewing distance determined in the target viewing distance determination step A visual characteristic data corresponding to the parallax condition determined in the determining step and the parallax condition determining step is read from the recording means , and the object in the virtual visual field space through the spectacle lens is read using the read visual characteristic data An image creation step of creating a binocular vision simulation image of the above. The simulation apparatus according to claim 1,
In the division step, two boundaries are provided between about 1 m and 2 m and between about 40 cm and 1 m, and the virtual visual field space is divided into three at a long distance, a medium distance, and a short distance. In the simulation apparatus according to claim 1 or claim 2,
In the target viewing distance determining step, the determination of the target viewing distance by adjusting the eye of the spectacle wearer is determined by designating an observation object in a virtual visual field space on the display screen of the display means. A simulation device. The simulation apparatus according to any one of claims 1 to 3,
The simulation device, wherein the lens is a progressive power lens having a progressive surface. 6. A simulation program for causing a calculation means to function as the simulation apparatus according to claim 1. 6. A recording medium on which a simulation program according to claim 5 is recorded so as to be readable by an arithmetic means.

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