IMAGE CREATION DEVICE, METHOD FOR IMAGE CREATION, IMAGE CREATION PROGRAM, METHOD FOR DESIGNING EYEGLASS LENS AND METHOD FOR MANUFACTURING EYEGLASS LENS

• US 20190246095A1
• Filed: 04/19/2019
• Published: 08/08/2019
• Est. Priority Date: 10/20/2016
• Status: Active Grant

• Current Assignee: Nikon-Essilor Co., Ltd.
• Original Assignee: Nikon-Essilor Co., Ltd.
• Inventors: KISHIMOTO, Takeshi
• Granted Patent: US 10,958,898 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 3/00 Apparatus for testing the eyes; Instruments for examining the eyes eye inspection using ultrasonic, sonic or infrasonic waves A61B8/10; devices for treatment of the eyes A61F9/00; exercisers for the eyes A61H5/00; optical systems in general G02B
• CPC Class Codes: A61B 3/0025 characterised by electronic signal processing, e.g. eye models
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02C 13/00 Assembling producing spectacle frames from plastics or from substances in a plastic state B29D12/02; Repairing; Cleaning disinfection or sterilisation of contact lenses A61L12/00
• CPC Class Codes: G02C 13/005 Measuring geometric parameters required to locate ophtalmic lenses in spectacles frames apparatus for testing or instruments for examining the eyes per se A61B3/00; machines or devices and accessories for grinding the edges of lenses using spectacles as a template B24B9/144
• CPC Class Codes: G02C 7/00 Optical parts characterised by the material G02B1/00
• CPC Class Codes: G02C 7/025 considering parameters of the viewed object
• CPC Class Codes: G02C 7/027 considering wearer's parameters
• CPC Class Codes: G02C 7/061 Spectacle lenses with progressively varying focal power
• CPC Class Codes: G06F 30/00 Computer-aided design [CAD]
• CPC Class Codes: G06T 15/06 Ray-tracing
• CPC Class Codes: G06T 19/00 Manipulating 3D models or images for computer graphics
• CPC Class Codes: G06T 2207/10012 Stereo images
• CPC Class Codes: G06T 2207/30041 Eye; Retina; Ophthalmic
• CPC Class Codes: G06T 7/0014 using an image reference approach
• CPC Class Codes: G06T 7/593 from stereo images
• CPC Class Codes: G06V 40/19 Sensors therefor
• CPC Class Codes: H04N 13/128 Adjusting depth or disparity
• CPC Class Codes: H04N 13/332 Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
• CPC Class Codes: H04N 2013/0081 : Depth or disparity estimation from stereoscopic image signals

Abstract

An image creation device includes: a storage unit in which target scene three-dimensional information related to a position, a shape and optical characteristics of a structural object present in a virtual target scene, eyeglass lens three-dimensional information related to a position, a shape and optical characteristics of an eyeglass lens and eyeball three-dimensional information related to a position, a shape and optical characteristics of an eye of a wearer viewing the target scene through the eyeglass lens used as a virtual lens; and a retina image creation unit that creates a retina image based upon the target scene three-dimensional information, the eyeglass lens three-dimensional information and the eyeball three-dimensional information, wherein: the retina image is a virtual image projected onto a retina of the eye of the wearer viewing the target scene through the eyeglass lens.

Claims

1. An image creation device, comprising:

a storage unit in which target scene three-dimensional information related to a position, a shape and optical characteristics of a structural object present in a virtual target scene, eyeglass lens three-dimensional information related to a position, a shape and optical characteristics of an eyeglass lens and eyeball three-dimensional information related to a position, a shape and optical characteristics of an eye of a wearer viewing the target scene through the eyeglass lens used as a virtual lens; and

a retina image creation unit that creates a retina image based upon the target scene three-dimensional information, the eyeglass lens three-dimensional information and the eyeball three-dimensional information, wherein;

the retina image is a virtual image projected onto a retina of the eye of the wearer viewing the target scene through the eyeglass lens.

2. The image creation device according to claim 1, further comprising:

a corresponding point calculation unit that calculates corresponding points, in retina images of two eyes, the corresponding points corresponding to a position within the target scene; and

a disparity calculation unit that calculates a binocular disparity with respect to the position based upon the corresponding points.

3. The image creation device according to claim 2, wherein:

the corresponding point calculation unit calculates the corresponding points based upon correlation coefficients with respect to, or differences between, luminance values at pixels in a first pixel region where a plurality of pixels are present, set in the retina image for one eye, and luminance values at pixels in a second pixel region where a plurality of pixels are present, set in the retina image for another eye.

4. The image creation device according to claim 2, further comprising:

a composite image creation unit that creates a composite image by using the retina images for the two eyes based upon the binocular disparity and a disparity correction parameter that includes a fusion ratio.

5. The image creation device according to claim 2, further comprising:

a disparity display unit that displays a distribution of the binocular disparity, which corresponds to the retina images.

6. The image creation device according to claim 1, wherein:

the retina image creation unit comprises a correction image creation unit that creates the retina image projected onto each retina of the eye based upon corrective lens three-dimensional information related to a position, a shape and optical characteristics of a corrective lens.

7. The image creation device according to claim 1, further comprising:

a ray tracing unit that calculates an entry direction along which, and an entry position at which a ray of light entering the retina of the eye at each position, enters an anterior surface of a cornea of the eye and calculates a light path along which the ray of light, having departed the target scene, passes through the anterior surface of the cornea and arrives at the position in the retina, and a luminance value at a pixel corresponding to the position in the retina, based upon the entry direction and the entry position.

8. The image creation device according to claim 1, further comprising:

an eyeball shape calculation unit that calculates the shape and the optical characteristics of the eye of the wearer based upon prescription data pertaining to the wearer.

9. The image creation device according to claim 8, wherein:

the eyeball shape calculation unit calculates the shape of the eye based upon accommodation ability and a pupil diameter of the wearer.

10. The image creation device according to claim 1, further comprising:

a moving image display unit that displays the retina image, or a composite image created by using the retina images for two eyes, as a moving image based upon a change occurring in the eyeball three-dimensional information.

14. A method for designing an eyeglass lens, the method comprising:

designing an eyeglass lens based upon the shape of the eyeglass lens used by the image creation device according to claim 1, to create the retina image.

15. A method for manufacturing an eyeglass lens, the method comprising:

designing the eyeglass lens through the method for designing an eyeglass lens according to claim 14; and

manufacturing the eyeglass lens having been designed through the method for designing an eyeglass lens.

11. A method for image creation, comprising:

creating a retina image based upon target scene three-dimensional information related to a position, a shape and optical characteristics of a structural object in a virtual target scene, eyeglass lens three-dimensional information related to a position, a shape and optical characteristics of an eyeglass lens and eyeball three-dimensional information related to a position, a shape and optical characteristics of an eye of a wearer virtually viewing the target scene through the eyeglass lens, wherein;

the retina image is an image of the target scene virtually viewed by the wearer through the eyeglass lens, projected onto a retina of the eye of the wearer.

12. The method for image creation according to claim 11, further comprising:

creating a composite image by using retina images of the two eyes based upon a disparity correction parameter that sets an extent by which a binocular disparity of the two eyes is to be corrected.

13. An image creation program enabling a computer to execute:

retina image creation processing through which a retina image is created based upon target scene three-dimensional information related to a position, a shape and optical characteristics of a structural object in a virtual target scene, eyeglass lens three-dimensional information related to a position, a shape and optical characteristics of an eyeglass lens and eyeball three-dimensional information related to a position, a shape and optical characteristics of an eye of a wearer virtually viewing the target scene through the eyeglass lens, wherein;

the retina image is an image of the target scene virtually viewed by the wearer through the eyeglass lens, projected onto a retina of the eye of the wearer.