Method for simulating and demonstrating the optical effects of glasses on the human face
First Claim
1. Method for demonstrating an effect of a particular spectacle frame and of virtual optical lenses fitted into this spectacle frame on an appearance of a spectacles wearer as it would be perceived by a virtual observer, comprising:
- (a) preparing at least one image of a face of the spectacles wearer such that the at least one image can be computer processed;
(b) determining an arrangement of the particular spectacle frame in front of the eyes of the spectacles wearer,(c) projecting the at least one image of the face onto a plane by way of a computation of principal rays passing through a center of rotation of an eye of the virtual observer, thereby producing a planar image of the face in the plane, and(d) taking into account an optical power of a region, through which a principal ray passes, of each of the optical lenses virtually fitted in a respective lens rim, and an arrangement of the lenses in front of the eye in computing paths of principal rays which lie within lens rims of the spectacle frame or edges of the spectacle lenses, so that the virtual observer of the thus-produced planar image of the face with “
worn”
spectacles can assess a distortion of an eyes portion of the face by the spectacle lenses and therewith a quality of the spectacle lenses.
5 Assignments
0 Petitions
Accused Products
Abstract
A method is provided for demonstrating an effect of a particular spectacle frame and of optical lenses fitted into this spectacle frame on the appearance of a spectacles wearer as it would be perceived by another person (virtual observer). An image of a face of the spectacles wearer is prepared in such manner that the image can be processes in a computer. An arrangement of the respective spectacle frame in front of the eyes is determined. The image of the face is projected onto a plane by a computation (ray-tracing) of principal rays passing through a center of rotation of an eye of the (virtual) observer to produce a planar image of the face in this plane. Taking into account an optical power of a region, through which a principal ray passes, of each spectacle lens (virtually) fitted in the respective lens rim, and it arrangement in front of the eye, the paths of prinipcal rays which lie within lens rims of the spectacle frame or edges of the spectacle lenses are computed so that an observer of the thus-produced planar image of the face with “worn” spectacles can assess a distortion of the eyes portion of the face by the spectacle lenses and therewith a quality of the spectacle lenses.
29 Citations
25 Claims
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1. Method for demonstrating an effect of a particular spectacle frame and of virtual optical lenses fitted into this spectacle frame on an appearance of a spectacles wearer as it would be perceived by a virtual observer, comprising:
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(a) preparing at least one image of a face of the spectacles wearer such that the at least one image can be computer processed; (b) determining an arrangement of the particular spectacle frame in front of the eyes of the spectacles wearer, (c) projecting the at least one image of the face onto a plane by way of a computation of principal rays passing through a center of rotation of an eye of the virtual observer, thereby producing a planar image of the face in the plane, and (d) taking into account an optical power of a region, through which a principal ray passes, of each of the optical lenses virtually fitted in a respective lens rim, and an arrangement of the lenses in front of the eye in computing paths of principal rays which lie within lens rims of the spectacle frame or edges of the spectacle lenses, so that the virtual observer of the thus-produced planar image of the face with “
worn”
spectacles can assess a distortion of an eyes portion of the face by the spectacle lenses and therewith a quality of the spectacle lenses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. Apparatus for demonstrating an effect of a particular spectacle frame and of virtual optical lenses fitted into this spectacle frame on an appearance of a spectacles wearer as it would be perceived by a virtual observer, comprising
means for preparing at least one facial image of the spectacles wearer for computer processing; -
an optional glaring-light source; a computer for computing principal rays based upon processing of the at least facial image after determining an arrangement of a spectacle frame in front of the eyes of the spectacles wearer and then projecting the at least one facial image onto a plane via the computed principal rays that pass through a center of rotation of the eye of virtual observer so as to produce a planar image of the spectacles wearer'"'"'s face, whereby taking into account an optical power of a region, through which a principal ray passes, of each spectacle lens virtually fitted in a respective lens rim, and an arrangement of each spectacle in front of the spectacles wearer'"'"'s eye in computing oaths of the principal rays which lie within lens rims of the spectacle frame or edges of each spectacle lens and optionally taking into account an effect of the glaring-light source such that the virtual observer of the thus-produced planar image of the face with “
worn”
spectacles can assess a distortion of an eyes portion of the face by each lens and therewith a quality of each lens. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification