JP7086392B2 - Image projection device and image projection method - Google Patents

Description

The present invention relates to an image projection device and an image projection method.

The retinal projection type image projection device scans the user's retina with a laser beam based on the input image data and projects the image on the user's retina to make the user visually recognize the image.

Further, in the conventional retina scanning type image projection device, the resolution of the image output unit that irradiates the laser beam is determined, and the image data is projected on the user's retina based on this resolution. In this case, the image projected on the retina is visually recognized by the user with a visual acuity corresponding to this resolution.

Japanese Unexamined Patent Publication No. 2016-134668

When the user tries to visually recognize the image projected on the retina in a way that corresponds to better visual acuity, it is conceivable to increase the resolution of the image output unit. However, when trying to increase the resolution of the image output unit, it is limited by the optical system of the image projection device, the image format, and the viewing angle.

The disclosed technique is made in view of the above-mentioned circumstances, and aims to improve the appearance of the image.

The disclosed technique is a storage unit that stores input image data, and an image indicated by the image data with respect to the image data, with a width of equal intervals from a reference position while maintaining the angle of view of the image. The image of the reference position is enlarged by dividing it into regions and making the width of the region closest to the reference position wider than the width of the equal intervals, and the width of the region becomes monotonous as the distance from the reference position increases. It has a control unit that corrects the image so as to reduce it toward the peripheral portion, and a light source unit that emits a laser beam. It is an image projection device having a laser irradiation unit that scans a laser beam in two dimensions and projects an image shown by the corrected image data on a user's retina using Maxwell vision .

The appearance of the image can be improved.

It is a figure explaining the hardware composition of the image projection apparatus of 1st Embodiment. It is a figure explaining the function of the control part of the 1st Embodiment. It is a flowchart explaining the operation of the image projection apparatus of 1st Embodiment. It is a flowchart explaining the correction of an image in 1st Embodiment. It is a 1st figure explaining the correction of an image in 1st Embodiment. It is a 2nd figure explaining the correction of an image in 1st Embodiment. It is a 3rd figure explaining the correction of an image in 1st Embodiment. It is a figure explaining the hardware composition of the image projection apparatus of the 2nd Embodiment. It is a figure explaining the function of the control part of the 2nd Embodiment. It is a figure explaining the setting of the reference position of the 2nd Embodiment. It is a flowchart explaining the operation of the image projection apparatus of 2nd Embodiment. It is a figure explaining the image projection system of the 3rd Embodiment. It is a figure explaining the process when the resolution of a projected image is lowered. It is a figure explaining the process when the resolution of a projected image is improved.

(First embodiment)
The first embodiment will be described below with reference to the drawings. FIG. 1 is a diagram illustrating a hardware configuration of the image projection device of the first embodiment.

The image projection device 100 of the present embodiment is a retinal projection type head-mounted display using Maxwell vision. An image is projected onto the user's retina using Maxwell vision. Maxwell vision is the process of converging an image ray based on image data at the center of the pupil and then projecting it onto the retina, so that the image shown by the image data to a person is displayed without being affected by the accommodation function of the human crystalline lens. This is a method of making it visible.

Further, the image projection device 100 of the present embodiment may have a frame shaped like general eyeglasses, or may have a shape like goggles covering both eyes of the user. Is also good.

The image projection device 100 of the present embodiment includes a communication unit 20, a control unit 30, a storage unit 40, a laser output control unit (ray output control unit) 50, a laser irradiation unit 60, and an image input unit 70.

The communication unit 20 is a communication device for communicating between the image projection device 100 and an external device. Specifically, for example, the communication unit 20 may acquire image data of an image to be projected on the image projection device 100 from an external device via a network or the like. The communication method by the communication unit 20 may be any method as long as the image projection device 100 and the external device can communicate with each other.

The control unit 30 is, for example, an arithmetic processing device or the like, and controls the entire operation of the image projection device 100 of the present embodiment. Specifically, the control unit 30 corrects the image data input from the communication unit 20, the image data stored in the storage unit 40, and the image data input from the image input unit 70. The corrected image data is output to the laser output control unit 50.

More specifically, the control unit 30 of the present embodiment enlarges the central portion of the image and reduces the peripheral portion without changing the size (angle of view) of the image indicated by the image data. Is corrected, and the corrected image data is output to the laser output control unit 50. Details of image correction by the control unit 30 will be described later.

The storage unit 40 stores a program executed by the control unit 30, various values acquired by calculation, and the like. Further, the storage unit 40 holds the image data input by the communication unit 20, the image input unit 70, and the like. Further, the storage unit 40 may store the corrected image data corrected by the control unit 30.

The laser output control unit 50 may be an arithmetic processing device or the like for controlling the laser irradiation unit 60, and for example, a laser beam based on the corrected image data stored in the storage unit 40 may be set in advance. The laser irradiation unit 60 irradiates the laser with the amount of light.

The laser irradiation unit 60 has a light source unit that irradiates the laser light, scans the laser light based on the corrected image data in two dimensions, and irradiates the user's eyeball (retina) 160 with a preset amount of light. By doing so, the image is projected onto the retina.

The image input unit 70 is for inputting image data to the image projection device 100. The image input unit 70 of the present embodiment may be, for example, an image pickup device such as a camera, and the image data captured by this image pickup device may be stored in the storage unit 40.

Further, the image input unit 70 uses an interface such as DVI (Digital Visual Interface), USB (Universal Serial Bus), HDMI (registered trademark) (High-Definition Multimedia Interface) for image data and moving image data from an external device. You can also enter it.

In the present embodiment, the image indicated by the corrected image data in which the central portion of the image is enlarged is projected onto the retina of the user. Therefore, according to the present embodiment, in the image shown by the corrected image data, the enlarged central portion is projected onto the fovea centralis of the macula, which is considered to have the best visual acuity in the user's retina. Become. In other words, according to the present embodiment, the image indicated by the corrected image data can be visually recognized by the user as an image larger than the image having a size corresponding to the resolution of the image projection device 100.

Therefore, according to the present embodiment, in the enlarged central portion, the user can visually recognize the image with a visual acuity that is better than the resolution of the image projection device 100 and the corresponding visual acuity. It is possible to improve the appearance of the image by.

Further, in the present embodiment, since the image data is corrected so as not to change the angle of view, the size of the image projected on the retina by the user is maintained. In other words, according to the present embodiment, it is possible to improve the appearance of the central portion while allowing the user to visually recognize the entire image.

In FIG. 1, the image projection device 100 has each part, but the present invention is not limited to this. For example, the communication unit 20, the control unit 30, the storage unit 40, and the like may be provided in a control terminal or the like that is connected to the image projection device 100 and controls the image projection device 100. In this case, the image projection device 100 may be provided with at least a laser output control unit 50 and a laser irradiation unit 60.

Next, the function of the control unit of the image projection device 100 of the present embodiment will be described. FIG. 2 is a diagram illustrating a function of the control unit of the first embodiment.

The control unit 30 of the present embodiment includes an image data acquisition unit 31, an image correction unit 32, and an image data output unit 33.

The image data acquisition unit 31 reads and acquires the image data stored in the storage unit 40. Further, the image data acquisition unit 31 acquires the image data received by the communication unit 20.

The image correction unit 32 corrects the image data acquired by the image data acquisition unit 31. Specifically, in the present embodiment, the central portion of the image is enlarged and the peripheral portion is reduced without changing the size (angle of view) of the image indicated by the image data acquired by the image data acquisition unit 31. The details of the image correction unit 32 will be described later.

The image data output unit 33 outputs the corrected image data corrected by the image correction unit 32 to the laser output control unit 50. In the following description, the image data after the correction by the image correction unit 32 is referred to as projection image data.

Next, the operation of the image projection device 100 of the present embodiment will be described with reference to FIG. FIG. 3 is a flowchart illustrating the operation of the image projection device of the first embodiment.

The control unit 30 of the image projection device 100 of the present embodiment acquires image data by the image data acquisition unit 31 (step S31).

In this embodiment, for example, the image data acquired by the image data acquisition unit 31 may be set in advance in the control unit 30. Specifically, for example, the image data acquisition unit 31 is preset with whether to acquire the image data stored in the storage unit 40 or the image data received by the communication unit 20. Is also good.

Further, in the present embodiment, when the communication unit 20 receives the image data, the image data acquisition unit 31 preferentially acquires the received image data, and the communication unit 20 receives the image data. If not, the image data stored in the storage unit 40 may be acquired.

Subsequently, the control unit 30 corrects the acquired image data by the image correction unit 32 (step S32). Details of step S32 will be described later.

Subsequently, the control unit 30 acquires the projection image data output from the image correction unit 32 and outputs it to the laser output control unit 50 (step S33).

Subsequently, when the laser output control unit 50 acquires the projection image data, the laser output control unit 50 controls the laser irradiation unit 60 to irradiate the laser beam according to the projection image data, and uses the projection image (corrected image). It is projected onto a person's retina (step S34).

If the image data to be projected is a moving image from a camera or a moving image (video) source played by an external device, the above processing is repeatedly executed to project the corrected moving image onto the user's retina in real time. be able to.

Next, with reference to FIG. 4, the image correction by the image correction unit 32 of the present embodiment will be described. FIG. 4 is a flowchart illustrating image correction in the first embodiment. FIG. 4 shows the details of step S32 shown in FIG.

In the image projection device 100 of the present embodiment, the image correction unit 32 of the control unit 30 divides the image indicated by the image data acquired by the image data acquisition unit 31 at equal intervals (step S41). As the dividing direction, either the vertical direction or the horizontal direction may be divided at equal intervals, or both the vertical direction and the horizontal direction may be divided at equal intervals.

Subsequently, the image correction unit 32 calculates the correction magnification of the central region in the plurality of divided regions (step S42).

In the present embodiment, the correction magnification of the central region is obtained by the desired visual acuity ÷ the current visual acuity.

The current visual acuity indicates the visual acuity corresponding to the resolution of the image projection device 100 (laser irradiation unit 60), and is a value given in advance. The desired visual acuity is a visual acuity that corresponds to the appearance of the image when the projection image data is projected onto the user's retina, and is a value that can be arbitrarily set.

Subsequently, the image correction unit 32 calculates the common ratio β used for calculating the correction magnification for reducing the width of the region divided at equal intervals in a geometric progression (step S43).

Subsequently, the image correction unit 32 calculates the correction magnification of a region other than the region of the central portion using the common ratio β (step S44).

Subsequently, the image correction unit 32 expands / reduces the width of each region according to the calculated correction magnification of each region, and creates projection image data (step S45).

The above-mentioned image correction process has been described as being calculated in each step in order after acquiring image data, but the present invention is not limited to this. The correction magnification and common ratio are calculated in advance according to the display mode, etc., and the values are used to generate projection image data to further improve the real-time performance of image (moving image) display. be able to.

Hereinafter, image correction by the image correction unit 32 of the present embodiment will be further described with reference to FIG. FIG. 5 is a first diagram illustrating image correction in the first embodiment. FIG. 5A shows an example of the image 51 before the correction, and FIG. 5B shows an example of the image 51A after the correction. In FIG. 5, for convenience of explanation, a one-color image is used. Further, in the example of FIG. 5, the image is divided into equal intervals in the horizontal direction.

The image 51 is an image indicated by the image data acquired by the image data acquisition unit 31. The image correction unit 32 specifies a line S that passes through the center point P in the image 51 and divides the image 51 into two equal parts. The center point P is, for example, the center of gravity of the rectangle shown in the image 51. Next, the image correction unit 32 divides the image 51 at equal intervals so that the number of regions divided by the line S is the same on the left and right.

In the example of FIG. 5A, the image correction unit 32 divides the right side region and the left side region into 10 regions L1 to L10, respectively, with the line S as the center (reference). Therefore, in the example of FIG. 5A, the region of the central portion is two regions L1 located on both sides of the line S.

Here, for example, assuming that the current visual acuity is 0.6 and the desired visual acuity is 0.8, the correction multiple X ₁ of the region L1 in the central portion is 0.8 ÷ 0.6 = 1.33 ... Will be.

Further, in the present embodiment, the correction multiples X2 to X10 corresponding to each of the regions L2 to L10 are represented by _{X n} = β × X _{n -1} .

Here, in the image correction unit 32, the value obtained by normalizing and adding the widths of the regions L1 to L10 is set as _A , and the correction multiples X1 of the region L1 and the correction multiples corresponding to the regions L2 to L10 _are X2. When B is the value obtained by adding ~ X ₁₀ and B, β is used as the common ratio when B ≦ A is satisfied and B becomes the maximum value.

Next, the image correction unit 32 corrects the width of each region Ln using the common ratio β. Specifically, the width W ₁ of the corrected region L1'shown in FIG. 5 (B) is obtained by the width of the region L1 × the correction multiple X ₁ . Further, the width W ₂ of the corrected region L2'is obtained by the width W ₁ × the common ratio β, and the width W ₃ of the corrected region L3 ′ is obtained by the width W ₂ × the common ratio β.

That is, the width W ₂ to the width W ₁₀ of the corrected region L2'to the region L10' can be obtained by the width W _n = the width W _n-1 × the common ratio β.

In the present embodiment, as described above, the image is divided horizontally at equal intervals, the division width of the central portion is widest, and the division width is monotonically decreased as the distance from the central portion increases. To correct.

In other words, in the present embodiment, the image is divided into regions having a width of equal intervals centered on the reference position without changing the angle of view of the image, and the width of the regions is geometric progression as the distance from the reference position increases. Correct so that it decreases to.

In the present embodiment, by this correction, the central portion of the image can be enlarged and the image can be reduced toward the peripheral portion while maintaining the size (angle of view) of the image before the correction.

The corrected image will be further described below with reference to FIGS. 6 and 7. FIG. 6 is a second diagram illustrating the image correction in the first embodiment.

FIG. 6A shows how the image G1 looks when the image data before correction is projected onto the user's retina, and FIG. 6B shows image data for projection (image data after correction). The appearance of the projection image G2 when the image is projected onto the user's retina is shown.

In the example of FIG. 6A, the image R1 of the Randold ring is arranged in the central portion of the image G1, and the image R1 of the Randold ring is projected onto the central portion of the retina of the user. At this time, the image R1 shown in FIG. 6A is an image of the Randold ring showing a visual acuity of 0.6. This visual acuity is given as the current visual acuity by the resolution of the image projection device 100.

The image G2 shown in FIG. 6B is an image shown by the projection image data obtained by correcting the image data showing the image G1 by the image correction unit 32.

The image R2 of the Randold ring is arranged in the central portion of the image G2. The image R2 of the Randold ring is an image obtained by enlarging the central portion of the image G1 by the image correction unit 32, thereby enlarging the image R1 of the Randolt ring arranged at the center of the image G1. In the example of FIG. 6, it is assumed that the desired visual acuity is 0.8 and the correction is performed by the image correction unit 32.

FIG. 7 is a third diagram illustrating image correction in the first embodiment. FIG. 7A shows how the image G3 looks when the image data before correction is projected onto the user's retina, and FIG. 7B shows image data for projection (image data after correction). The appearance of the projection image G4 when the image is projected onto the user's retina is shown.

In the example of FIG. 7, it can be seen that the central portion of the image G4 is enlarged as compared with the image G3. Further, in the present embodiment, the angle of view (image size) is not changed in both the image G3 and the image G4. Therefore, in the image G4, the central portion is enlarged and the image in the same range as the image G3 is included. Therefore, in the present embodiment, it is possible to improve the appearance of the central portion of the image G3 so as not to narrow the field of view of the user and to make the user feel uncomfortable.

The method of image correction by the image correction unit 32 of the present embodiment is not limited to the above-mentioned method. In the present embodiment, it suffices if the value of the width of the image region divided at equal intervals can be monotonically decreased from the reference position toward the peripheral direction without changing the angle of view, and other than the above-mentioned method. It may be corrected by any method.

Further, in the examples of FIGS. 5 to 7, the image is divided so that the widths in the horizontal direction (long side direction) are evenly spaced, but the image is not limited to this. The image may be divided so that the widths in the vertical direction (short side direction) are evenly spaced, or the images may be divided so that both the horizontal direction and the vertical direction are evenly spaced.

Further, for example, in the present embodiment, whether to divide the width in the horizontal direction (long side direction) of the image, the width in the vertical direction, or the width in the horizontal direction and the vertical direction is divided. It may be selected according to the direction of the image to be projected on the user's retina and the type of the image. At this time, it is preferable to maintain the aspect ratio of the image.

Further, the image projection device 100 of the present embodiment has been described as a general spectacle-type head-mounted display, but the present invention is not limited thereto. The image projection device 100 may be, for example, an image projection device as a stationary visual inspection device installed in a medical institution, an optician, or the like.

(Second embodiment)
The second embodiment will be described below with reference to the drawings. The second embodiment differs from the first embodiment in that a reference position can be set when the image before correction is divided. Therefore, in the following description of the second embodiment, the differences from the first embodiment will be described, and for those having the same functional configuration as the first embodiment, the description of the first embodiment will be described. A code similar to the code used is assigned, and the description thereof will be omitted.

FIG. 8 is a diagram illustrating a hardware configuration of the image projection device of the second embodiment. The image projection device 100A of the present embodiment includes a communication unit 20, a control unit 30A, a storage unit 40, a laser output control unit (ray output control unit) 50, a laser irradiation unit 60, an image input unit 70, and an operation unit 80.

The operation unit 80 of the present embodiment is for inputting various information to the image projection device 100A. Specifically, for example, the operation unit 80 is an operation member for setting an enlarged region of the image projected on the user's retina by the image projection device 100A.

The operation unit 80 of the present embodiment may be provided, for example, in a vine portion or the like when the image projection device 100A is a spectacle-type head-mounted display. When the operation unit 80 is provided on the vine portion, the user of the image projection device 100A specifies an area to be enlarged in the image projected on his / her own retina with the image projection device 100A attached. can do.

In the present embodiment, the setting of the enlarged area in the image projected on the user's retina may be performed by, for example, a terminal device connected to the image projection device 100A via the communication unit 20.

The control unit 30A of the present embodiment corrects the image data so that the area set by the operation unit 80 is enlarged.

FIG. 9 is a diagram illustrating the function of the control unit of the second embodiment. The control unit 30A of the present embodiment includes an image data acquisition unit 31, an image correction unit 32, an image data output unit 33, and a reference position setting unit 34.

The reference position setting unit 34 of the present embodiment sets the reference position when the image is divided into equal intervals in the image before correction.

The reference position will be described below with reference to FIG. FIG. 10 is a diagram illustrating the setting of the reference position of the second embodiment.

FIG. 10 shows a case where the line S1 is set as a reference in the image 51. In the example of FIG. 10, since the line S1 serves as a reference when dividing the image at equal intervals, two regions L11 adjacent to each other with the line S1 interposed therebetween are the central regions.

That is, in the present embodiment, the region centered on the line S1 is enlarged by the image correction unit 32.

In the example of FIG. 10, the line S1 is set as the reference position, but the present invention is not limited to this. The reference position may be a point. When a point is set as the reference position, the image 51 is divided into the vertical direction and the horizontal direction at equal intervals around the point, and the area vertically adjacent to the point is divided into the area. The region adjacent to each other in the lateral direction via the point may be set as the central region.

If the reference position is a point, the area of the circle with the shortest radius among the concentric circles centered on this point and the area where this circle and the circle with the next shortest radius do not overlap are adjacent to each other. It may be an area to be used.

Next, the operation of the control unit 30A of the present embodiment will be described with reference to FIG. FIG. 11 is a flowchart illustrating the operation of the image projection device of the second embodiment.

The control unit 30A of the present embodiment acquires image data by the image data acquisition unit 31 (step S1101). Subsequently, the control unit 30A determines a position as a reference for correction by the image correction unit 32 by the reference position setting unit 34 (step S1102).

Since the processing from step S1103 to step S1105 in FIG. 11 is the same as the processing from step S32 to step S34 in FIG. 3, the description thereof will be omitted.

In the present embodiment, since the reference position for correction by the image correction unit 32 can be arbitrarily set in this way, it is possible to enlarge an arbitrary area of the image projected on the user's retina according to the user's request. can.

Further, in the present embodiment, the operation unit 80 for setting the reference position can be operated by the user with the image projection device 100A attached, so that the user can operate the operation unit 80 from the images visually recognized by the user. You can expand the desired area yourself.

(Third embodiment)
The third embodiment will be described below with reference to the drawings. The third embodiment is different from the second embodiment in that in the image projection device 100A, the region for enlarging the image is determined according to the information indicating the result of the visual field test. Therefore, in the following description of the third embodiment, only the differences from the second embodiment will be described, and for those having the same functional configuration as the second embodiment, the second embodiment will be described. The same reference numerals as those used in the above are given, and the description thereof will be omitted.

FIG. 12 is a diagram illustrating an image projection system according to a third embodiment. The image projection system 200 of the present embodiment includes an image projection device 100A and a server device 300, and the image projection device 100A and the server device 300 are connected via a network or the like.

The server device 300 has an inspection result database 310. The inspection result database 310 stores inspection result information including the result of the visual field inspection of the user of the image projection device 100A and the result of the visual acuity inspection. The inspection result database 310 of the present embodiment may store the identification information that identifies the image projection device 100A and the inspection result information of the user of the image projection device 100A in association with each other.

The image projection device 100A of the present embodiment transmits, for example, identification information (device ID or the like) that identifies the image projection device 100A to the server device 300 via the communication unit 20. When the server device 300 receives this identification information, it refers to the inspection result information associated with the identification information and transmits, for example, the inspection result information of the user of the image projection device 100A to the image projection device 100A. ..

The test result information includes, for example, information regarding the user's visual field and information indicating visual acuity. The information regarding the visual field is, for example, information indicating an area in which the user can visually recognize the image.

When the image projection device 100A receives the inspection result information, the reference position setting unit 34 may set the reference position for correction by the image correction unit 32 within the area where the user can visually recognize the image.

Further, the image projection device 100A corrects the image by the image correction unit 32 when, for example, it is determined from the information indicating the visual acuity included in the inspection result information that the visual acuity of the user is equal to or less than a predetermined value. Is also good.

Here, it will be described that the image projection device 100 of the present invention improves the resolution of the image projected on the retina.

The image data input from the image input unit 70 of FIG. 1 of the first embodiment is output from a camera or an external device capable of reproducing the image data. In the following description, the image indicated by the image data output from these devices, that is, the image indicated by the image data input from the image input unit 70 is referred to as an input image.

The resolution of the input image is 1280 x 720 pixels in high definition called 720p, 1920 x 1080 pixels in full high definition called 1080p, and 3840 x 2160 pixels in what is called 4K. The resolution of is continuing to improve.

However, since the resolution of the projection system using the optical system in the image projection device 100 of the present embodiment is currently about 720p, even if the image data of the high-resolution input image is input, when it is projected onto the retina, It is not possible to project an image of that resolution.

In the image projection device 100 of the present embodiment, the resolution of the projection system can be improved even when the resolution of the projection system is lower than the resolution of the input image.

A mechanism for improving the resolution of the projection system will be described with reference to FIGS. 13 and 14. FIG. 13 is a diagram for explaining a process when the resolution of the projected image is lowered, and FIG. 14 is a diagram for explaining a process when the resolution of the projected image is improved.

13 (a) and 13 (b) are diagrams schematically showing an input image indicated by image data input from a camera or the like and an image of a projection system when enlargement correction is not performed.

The resolution of the input image is 54 × 54 pixels, while the resolution of the projected image projected by the projection system is 27 × 27 pixels, and the resolution of the projected image is half the resolution of the input image.

In this case, if the image data indicating the input image is directly converted to a projection system having half the resolution and projected, the image data is thinned out, and the projected image cannot reproduce all of the input image.

Specifically, the Randold ring displayed in FIG. 13 (a) is displayed in the pixel of 18 × 18, but in FIG. 13 (b), it is displayed in the pixel of 9 × 9. It can be seen that the resolution is decreasing.

Next, with reference to FIG. 14, the state of the resolution in the image projection apparatus 100 of the present embodiment when the enlargement correction is performed will be described.

FIG. 14A is a diagram showing an input image having a resolution of 54 × 54 pixels, similarly to FIG. 13A, and FIG. 14B is a corrected image obtained by performing enlargement correction on the input image. It is a figure which shows the image of.

In the examples described in the first embodiment and the like so far, the enlargement correction has been performed so that the correction factor monotonically decreases from the central portion, but here, for the sake of simplicity, the magnification is fixed at the central portion. An example is shown in the case where the image is enlarged and the surrounding area is reduced at a fixed magnification.

The Randold ring in the central portion of FIG. 14A is converted into image data in 18 × 18 pixels. FIG. 14 (b) shows a case in which this is magnified and corrected twice in the vertical and horizontal directions. In the image shown in FIG. 14 (b), since the central portion of the input image is enlarged, it is necessary to reduce the periphery in order to display the entire field of view of the input image, and in FIG. 14 (b), the periphery is reduced. There is. In FIG. 14B, the enlarged central region is defined as the region C, and the reduced peripheral region is designated as the region T.

FIG. 14 (c) shows the image data of the image shown in FIG. 14 (b) converted into a projection system having a resolution of half, and the Randold ring in the central region C is also at the resolution of the projection system. It can be seen that the image is displayed with the same 18 × 18 pixels as the camera image.

As described above, in the present embodiment, by performing the enlargement correction, even if the resolution of the projection system is lower than the resolution of the input image, the resolution can be improved at the position where the enlargement correction is performed on the input image. become.

Further, even if the resolution of the input image and the resolution of the image projected by the projection system are the same, it is possible to improve the visibility of the portion where the enlargement correction is performed by performing the enlargement correction.

As described above, the image projection device 100A of the present embodiment may correct the image according to the result of the visual field test or the visual acuity test of the user. In this way, in the present embodiment, the corrected image can be projected onto the user's retina so as to improve the appearance of the individual user simply by wearing the image projection device 100A. can.

Although the present invention has been described above based on each embodiment, the present invention is not limited to the requirements shown here, such as the configuration described in the above embodiment and the combination with other elements. With respect to these points, the gist of the present invention can be changed without impairing the gist of the present invention, and can be appropriately determined according to the application form thereof.

20 Communication unit 30, 30A Control unit 40 Storage unit 50 Laser output control unit 60 Laser irradiation unit 70 Image input unit 80 Operation unit 100, 100A Image projection device

Claims (9)

A storage unit that stores the input image data,
With respect to the image data, the image indicated by the image data is divided into regions having a width equal to each other from the reference position while maintaining the angle of view of the image, and the width of the region closest to the reference position is defined as the width of the region closest to the reference position. The image at the reference position is enlarged by making it wider than the width at equal intervals, and the width of the region is monotonically reduced as the distance from the reference position increases, so that the image is reduced toward the peripheral portion. In addition , the control unit that performs correction and
It has a light source unit that emits a laser beam, scans the laser beam in two dimensions based on the image data corrected by the control unit, and displays the image shown by the corrected image data on the user's retina in Maxwell. An image projection device having a laser irradiation unit that projects using vision . The control unit
The image projection apparatus according to claim 1, wherein the image projection device is separated from the reference position and therefore the width of the region is geometrically reduced. The reference position is
The image projection device according to claim 1 or 2 , which is the position of the fovea centralis of the macula of the user projected using Maxwell vision . It has an operation unit for setting the reference position in the image, and has an operation unit.
The control unit
The image projection device according to claim 1 or 2 , wherein the reference position in the image is set according to the setting by the operation unit. The correction by the control unit
The image projection device according to any one of claims 1 to 4 , which is a correction for increasing the resolution of an image projected from the laser irradiation unit. A storage unit that stores the input image data,
With respect to the image data, the image indicated by the image data is divided into regions having a width equal to each other from the reference position while maintaining the angle of view of the image, and the width of the region increases as the distance from the reference position increases. A control unit that corrects the image so that it decreases monotonically,
It has a light source unit that emits a laser beam, scans the laser beam in two dimensions based on the image data corrected by the control unit, and projects the image indicated by the corrected image data on the user's retina. It has a laser irradiation unit and
The correction by the control unit
Image projection, which is a correction for increasing the resolution of an image projected from the laser irradiation unit when the resolution of the image projected from the laser irradiation unit is lower than the resolution of the image indicated by the input image data. Device. An image projection method using an image projection device, wherein the image projection device is
The procedure for storing the input image data in the storage unit and
With respect to the image data, the image indicated by the image data is divided into regions having a width equal to each other from the reference position while maintaining the angle of view of the image, and the width of the region closest to the reference position is defined as the width of the region closest to the reference position. The image at the reference position is enlarged by making it wider than the width at equal intervals, and the width of the region is monotonically reduced as the distance from the reference position increases, so that the image is reduced toward the peripheral portion. In addition , the procedure for making corrections and
It has a light source unit that emits a laser beam, scans the laser beam in two dimensions based on the corrected image data , and uses Maxwell vision to display the image shown by the corrected image data on the user's retina. And the procedure of projecting, and the image projection method. The image projection method according to claim 7 , wherein the correction is a correction for increasing the resolution of the projected image data. An image projection method using an image projection device, wherein the image projection device is
The procedure for storing the input image data in the storage unit and
With respect to the image data, the image indicated by the image data is divided into regions having a width equal to each other from the reference position while maintaining the angle of view of the image, and the width of the region is monotonous because the region is separated from the reference position. The procedure for making corrections so that it decreases to
A laser irradiation unit having a light source unit that emits a laser beam scans the laser beam in two dimensions based on the corrected image data, and projects an image indicated by the corrected image data on the user's retina. With the procedure,
The correction is
An image projection method, which is a correction for increasing the resolution of an image projected from the laser irradiation unit when the resolution of the image projected from the laser irradiation unit is lower than the resolution of the image indicated by the input image data.

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