Eyeglass fitting parameter measurement system and measurement method

Abstract

In order to solve the problems of low efficiency and large error in acquiring eyeglass fitting parameters of existing frames, the present invention provides an eyeglass fitting parameter measurement system and measurement method. The eyeglass fitting parameter measurement system comprises an eyeglass fitting camera device and visual recognition glasses. The visual recognition glasses comprise a frame and two temples. The frame is provided with a plurality of first visual recognition points, and the temples are provided with a plurality of second visual recognition points. The eyeglass fitting camera device comprises a front camera and a side camera, wherein the front camera is used for acquiring a front image of the head of an eyeglass fitting object wearing the visual recognition glasses, and the side camera is used for acquiring a side image of the head of the eyeglass fitting object wearing the visual recognition glasses. The eyeglass fitting parameter measurement system provided by the present invention facilitates the improvement of the adaptability between eyeglasses and eyeglass fitting objects, thereby improving the wearing experience and visual correction effect of the eyeglass fitting objects.

Description

A system and method for detecting eyeglass fitting parameters

[0001] This application claims priority to Chinese Patent Application No. CN202410778717.2, filed on June 17, 2024, entitled "A System for Detecting Eyeglass Fitting Parameters and a Method Thereof", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention belongs to the field of eyeglass fitting technology and relates to an eyeglass fitting parameter detection system and its detection method. Background Technology

[0003] Current eyeglass fitting processes often focus on lens selection while neglecting the role of the frame. When the frame doesn't fit the wearer, even with lenses that match their optical characteristics, insufficient visual correction can occur. For example, under direct vision, the wearer's pupil center and focal length center may not align with the lens's optical center, primarily due to a mismatched frame. The eyeglass fitting process involves significant interaction between the wearer and service personnel, leading to low efficiency and human error. To address these issues, a technique using visual recognition to create a 3D head model of the wearer allows for virtual fitting, ensuring the frame parameters are matched to the individual. However, since the wearer doesn't actually wear the glasses, significant calculation errors remain. Another method is to obtain eyeglass fitting parameters by using test glasses, but this method generally only collects frontal data. At the same time, the test glasses cannot be perfectly matched with the person being fitted for glasses. Therefore, it is also difficult to obtain eyeglass frames and lenses that are perfectly matched to the person being fitted for glasses. Summary of the Invention

[0004] To address the problems of low efficiency and large errors in obtaining lens fitting parameters for existing eyeglass frames, this invention provides a lens fitting parameter detection system and its detection method.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] On one hand, the present invention provides a system for detecting eyeglass fitting parameters, including an eyeglass fitting camera device and visual recognition glasses;

[0007] The visual recognition glasses include an eyeglass frame and two temples. The two temples are connected to the two sides of the eyeglass frame at an adjustable distance. When the temples are extended, the angle between the temples and the plane of the eyeglass frame is adjustable. The eyeglass frame is provided with a plurality of first visual recognition points, and the temples are provided with a plurality of second visual recognition points.

[0008] The eyeglass fitting camera device includes a front camera and a side camera. The front camera is used to acquire a frontal image of the head of the person wearing the visual recognition glasses, and the side camera is used to acquire a side image of the head of the person wearing the visual recognition glasses.

[0009] Optionally, the lens fitting camera device includes a support frame, which is a semi-enclosed structure with an opening on one side. The support frame includes an inner wall, a left wall, and a right wall. The two sides of the inner wall are respectively connected to the left wall and the right wall to form a semi-enclosed structure with an opening on one side. The front camera is disposed on the inner wall facing the opening, and the side camera is disposed on the left wall or the right wall.

[0010] Optionally, the support frame further includes a base plate and a head support member. The inner side wall, the left side wall, and the right side wall are all connected to the base plate. The head support member is located on the base plate and is used for head support and positioning of the person receiving eyeglasses.

[0011] Optionally, the plurality of first visual recognition points include a frontal visual recognition point and a side visual recognition point, wherein the frontal visual recognition point is located on the front of the eyeglass frame and the side visual recognition point is located on the side of the eyeglass frame.

[0012] The eyeglass frame includes a bridge, a left frame, and a right frame. The left frame is located on the left side of the bridge and the right frame is located on the right side of the bridge. The frontal visual recognition points include a first, a second, a third, a fourth, and a fifth frontal visual recognition point. The first frontal visual recognition point is located on the bridge, the second is located at the lower left of the left frame, the third is located at the upper left of the left frame, the fourth is located at the lower right of the right frame, and the fifth is located at the upper right of the right frame. The side visual recognition points include a first side visual recognition point, which is located at the center of the side of both the left and right frames.

[0013] The eyeglass frame also includes a left end and a right end. The left end is movably disposed on the left side of the left eyeglass frame, and the right end is movably disposed on the right side of the right eyeglass frame. The two temples are rotatably connected to the left end and the right end, respectively.

[0014] The frontal visual recognition points include a sixth frontal visual recognition point and a seventh frontal visual recognition point. The sixth frontal visual recognition point is located on the front of the left pile head, and the seventh frontal visual recognition point is located on the front of the right pile head. The side visual recognition points include a second side visual recognition point. The second side visual recognition point is provided on the side of both the left pile head and the right pile head.

[0015] Optionally, the temple of the glasses includes a connecting section and a temple section. One end of the connecting section is rotatably connected to the eyeglass frame about a vertical axis of rotation, and the other end of the connecting section is rotatably connected to one end of the temple section about a horizontal axis of rotation. The other end of the temple section forms an arc-shaped portion for supporting the upper part of the ear.

[0016] The second visual recognition point includes a third side visual recognition point and a fourth side visual recognition point, which are spaced apart on the outer side of the leg segment.

[0017] Optionally, the eyeglass frame further includes a first nose pad, a second nose pad, and a knob. The knob is rotatably mounted on the bridge of the nose. The first and second nose pads are slidably mounted on the bridge of the nose. The first nose pad has a first strip-shaped hole, and the second nose pad has a second strip-shaped hole. The knob is provided with a first post and a second post. The first post and the second post are respectively inserted into the first strip-shaped hole and the second strip-shaped hole. The rotation of the knob causes the first and second nose pads to move closer to or further away from each other.

[0018] On the other hand, the present invention provides a method for detecting eyeglass fitting parameters, which applies the eyeglass fitting parameter detection system described above and includes the following operations:

[0019] Glasses adjustment and fitting: The person wearing the visual recognition glasses adjusts the distance between the two temples. With the temples extended, the angle between the temples and the plane of the eyeglass frame is adjusted to fit the visual recognition glasses to the person wearing the glasses.

[0020] The head of the person wearing the visual recognition glasses is placed at the lens fitting camera device. A frontal image of the head of the person wearing the glasses is obtained through the front camera, and a side image of the head of the person wearing the glasses is obtained through the side camera.

[0021] The facial information, positional information of multiple first visual recognition points, and positional information of multiple second visual recognition points of the subject to be fitted for glasses are obtained from the frontal and side images of the head. The fitting parameters are then obtained based on the facial information, positional information of multiple first visual recognition points, and positional information of multiple second visual recognition points of the subject to be fitted for glasses.

[0022] Optionally, the facial information includes the center positions of the left and right pupils and the bridge of the nose in the frontal image of the head, as well as the position information of the temple support point in the side image of the head. The temple support point position information is the contact point position information between the ear and the temple of the eyeglasses. The lens fitting parameters include face width, bridge of the nose, interpupillary distance, left interpupillary distance, right interpupillary distance, and temple length. The face width is the distance between the sixth frontal visual recognition point on the front of the left end and the seventh frontal visual recognition point on the front of the right end. The interpupillary distance is the distance between the center of the left and right pupils of the lens fitting object. The left interpupillary distance is the distance from the first frontal visual recognition point on the bridge of the nose to the center of the left pupil of the lens fitting object. The right interpupillary distance is the distance from the first frontal visual recognition point on the bridge of the nose to the center of the right pupil of the lens fitting object. The temple length is the distance from the contact point position to the second side visual recognition point.

[0023] Optionally, the lens fitting parameters also include the relative position of the left pupil and the relative position of the right pupil. The relative position of the left pupil is the relative position of the center of the left pupil with respect to the first frontal visual recognition point, the second frontal visual recognition point, and the third frontal visual recognition point. The relative position of the right pupil is the relative position of the center of the right pupil with respect to the first frontal visual recognition point, the fourth frontal visual recognition point, and the fifth frontal visual recognition point.

[0024] Optionally, the facial information includes eye position information in the side-view image of the head, wherein the eye position information is the position information of the outermost point of the eyeball in the side-view image of the head, and the lens fitting parameters include frame distance and temple angle, wherein the frame distance is the distance from the eyeball position to the first side-view visual recognition point, and the temple angle is obtained by the following method:

[0025] The plane position of the eyeglass frame is determined by the first and second side visual recognition points, and the position of the temples is determined by the third and fourth side visual recognition points. The relative angle between the temples and the eyeglass frame is obtained based on the first, second, third, and fourth side visual recognition points.

[0026] According to the lens fitting parameter detection system and method provided by the present invention, an adjustable visual recognition eyeglass is provided. This eyeglass can be adjusted to fit the head of the person requiring lens fitting, thereby obtaining a lens state that fits the head of the person requiring lens fitting through actual wearing. The eyeglass frame and temples of the visual recognition eyeglass are respectively provided with a first visual recognition point and a second visual recognition point. Combined with the frontal and side images of the head obtained by the front and side cameras, the relative positional relationship of the eyeglass frame and temples of the visual recognition eyeglass currently fitting the person requiring lens fitting can be directly determined. Furthermore, by combining this with the facial information of the person requiring lens fitting, more accurate lens fitting parameters can be obtained compared to conventional lens fitting methods. This improves the fit between the eyeglasses prepared based on the lens fitting parameters and the person requiring lens fitting, thereby enhancing the wearing experience and visual correction effect for the person requiring lens fitting. Attached Figure Description

[0027] Figure 1 is a schematic diagram of the lens fitting camera device provided by the present invention;

[0028] Figure 2 is a schematic diagram of the rear structure of the lens fitting camera device provided by the present invention;

[0029] Figure 3 is a schematic diagram of the structure of the visual recognition glasses provided by the present invention;

[0030] Figure 4 is a side view of the visual recognition glasses provided by the present invention;

[0031] Figure 5 is a cross-sectional view of the temple of the visual recognition glasses provided by the present invention;

[0032] Figure 6 is an enlarged schematic diagram of the right post position of the visual recognition glasses provided by the present invention;

[0033] Figure 7 is a schematic diagram of the combination of the first nose pad, the second nose pad, and the knob provided by the present invention.

[0034] The reference numerals in the accompanying drawings are as follows: 1. Visual recognition glasses; 11. Glasses frame; 111. Left end cap; 112. Left eyeglass frame; 113. Bridge of the nose; 114. Right eyeglass frame; 115. Right end cap; 12. Temple; 121. Connecting section; 122. Temple section; 123. Positioning hole; 124. Extension rod; 125. Positioning elastic protrusion; 13. First visual recognition point; 131. First frontal visual recognition point; 132. Second frontal visual recognition point; 133. Third frontal visual recognition point; 134. Fourth frontal visual recognition point; 135. Fifth frontal visual recognition point; 136. Sixth frontal visual recognition point; 137. Seventh frontal visual recognition point; 138. First side visual recognition point; 4. Second visual recognition point; 141. Second side visual recognition point; 142. Third side visual recognition point; 143. Fourth side visual recognition point; 15. Knob; 151. First column; 152. Second column; 16. First nose pad; 161. First strip hole; 17. Second nose pad; 171. Second strip hole; 2. Lens fitting camera device; 21. Support frame; 211. Inner wall; 212. Left side wall; 213. Right side wall; 214. Base plate; 215. Head support; 216. Display screen; 22. Front camera; 23. Side camera. Detailed Implementation

[0035] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0036] In the description of this invention, it should be understood that the terms "front," "side," "upper," "lower," "left," "right," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship of the subject's head, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] Referring to Figures 1 to 4, this embodiment of the invention provides a system for detecting eyeglass fitting parameters, including an eyeglass fitting camera device 2 and visual recognition glasses 1;

[0039] The visual recognition glasses 1 include an eyeglass frame 11 and two temples 12. The two temples 12 are connected to the two sides of the eyeglass frame 11 at an adjustable distance, and when the temples 12 are extended, the angle between the temples 12 and the plane of the eyeglass frame 11 is adjustable. The eyeglass frame 11 is provided with a plurality of first visual recognition points 13, and the temples 12 are provided with a plurality of second visual recognition points 14.

[0040] The eyeglass fitting camera device 2 includes a front camera 22 and a side camera 23. The front camera 22 is used to acquire a frontal image of the head of the person wearing the visual recognition glasses 1, and the side camera 23 is used to acquire a side image of the head of the person wearing the visual recognition glasses 1.

[0041] The visual recognition glasses 1 can be adjusted to fit the head of the person receiving the glasses, thereby obtaining a glasses state that fits the head of the person receiving the glasses through actual wearing. The glasses frame 11 and temples 12 of the visual recognition glasses 1 are respectively provided with a first visual recognition point 13 and a second visual recognition point 14. Combined with the frontal and side head images obtained by the front camera 22 and the side camera 23, the relative positional relationship of the glasses frame 11 and temples 12 of the visual recognition glasses 1 that are currently fitted to the person receiving the glasses can be directly known. In addition, combined with the facial information of the person receiving the glasses, more accurate fitting parameters can be obtained compared with conventional fitting methods. This is conducive to improving the fit between the glasses prepared according to the fitting parameters and the person receiving the glasses, and improving the wearing experience and visual correction effect of the person receiving the glasses.

[0042] In one embodiment, the lens fitting camera device 2 includes a support frame 21, which is a semi-enclosed structure with an opening on one side. The support frame 21 includes an inner sidewall 211, a left sidewall 212, and a right sidewall 213. The two sides of the inner sidewall 211 are respectively connected to the left sidewall 212 and the right sidewall 213 to form a semi-enclosed structure with an opening on one side. The front camera 22 is disposed on the inner sidewall 211 facing the opening, and the side camera 23 is disposed on the left sidewall 212 or the right sidewall 213.

[0043] When taking a frontal image of the head of the person applying for glasses, the head of the person applying for glasses can be placed between the left side wall 212 and the right side wall 213, and the person applying for glasses can face the frontal camera 22, while the side camera 23 faces the side of the head of the person applying for glasses, so as to obtain an image with a camera angle that meets the visual recognition requirements.

[0044] In one embodiment, the support frame 21 further includes a base plate 214 and a head support 215. The inner side wall 211, the left side wall 212 and the right side wall 213 are all connected to the base plate 214. The head support 215 is located on the base plate 214 and is used for head support and positioning of the eyeglasses fitting object.

[0045] Positioning the head of the person receiving eyeglasses using the head support 215 helps ensure the certainty of the head position during each measurement, thereby ensuring that the relative position of the head of the person receiving eyeglasses is controllable with respect to the front camera 22 and the side camera 23, and improving the accuracy and reliability of the test results.

[0046] In one embodiment, the support frame 21 further includes a light source disposed on one or more of the inner sidewall 211, the left sidewall 212, and the right sidewall 213.

[0047] The light source is used to increase the light intensity, thereby improving the shooting effect of the front camera 22 and the side camera 23, and avoiding the impact of low ambient light on the shooting effect and parameter acquisition.

[0048] As shown in Figure 2, in one embodiment, a display screen 216 is provided on the side of the inner wall 211 opposite to the head support 215. The display screen 216 is used to display a frontal or side view of the head, as well as to display the prescription parameters.

[0049] As shown in Figure 3, in one embodiment, the plurality of first visual recognition points 13 include frontal visual recognition points and side visual recognition points. The frontal visual recognition points are located on the front of the eyeglasses frame 11, and the side visual recognition points are located on the side of the eyeglasses frame 11.

[0050] When identifying the relative position of the eyeglasses frame 11 in a frontal head image, a coordinate axis system can be established through the frontal visual recognition points, thereby determining the position of the eyeglasses frame 11 in the frontal head image; similarly, when identifying the relative position of the eyeglasses frame 11 in a side head image, a coordinate axis system can be established through the side visual recognition points, thereby determining the position of the eyeglasses frame 11 in the side head image.

[0051] In one embodiment, the eyeglass frame 11 includes a bridge 113, a left eyeglass frame 112, and a right eyeglass frame 114. The left eyeglass frame 112 is located on the left side of the bridge 113, and the right eyeglass frame 114 is located on the right side of the bridge 113. The frontal visual recognition points include a first frontal visual recognition point 131, a second frontal visual recognition point 132, a third frontal visual recognition point 133, a fourth frontal visual recognition point 134, and a fifth frontal visual recognition point 135. The first frontal visual recognition point 131 is located on the bridge 113. The second frontal visual recognition point 132 is located at the lower left of the left eyeglass frame 112, the third frontal visual recognition point 133 is located at the upper left of the left eyeglass frame 112, the fourth frontal visual recognition point 134 is located at the lower right of the right eyeglass frame 114, the fifth frontal visual recognition point 135 is located at the upper right of the right eyeglass frame 114, and the side visual recognition point includes a first side visual recognition point 138, which is provided at the middle of the side of both the left eyeglass frame 112 and the middle of the side of the right eyeglass frame 114.

[0052] The position of the bridge of the nose 113 of the eyeglass frame 11 can be directly obtained through the first frontal visual recognition point 131. The left interpupillary distance can be obtained from the distance between the first frontal visual recognition point 131 and the center of the left pupil of the eyeglasses wearer, and the right interpupillary distance can be obtained from the distance between the first frontal visual recognition point 131 and the center of the right pupil of the eyeglasses wearer. Furthermore, since the first frontal visual recognition point 131, the second frontal visual recognition point 132, and the third frontal visual recognition point 133 are respectively located on the outer periphery of the left eyeglass frame 112, the position information of the left eyeglass frame 112 can be directly obtained through the first frontal visual recognition point 131, the second frontal visual recognition point 132, and the third frontal visual recognition point 133. Since the first frontal visual recognition point 131, the fourth frontal visual recognition point 134, and the fifth frontal visual recognition point 135 are respectively located on the outer periphery of the right eyeglass frame 114, the position information of the left eyeglass frame 112 can be directly obtained through the first frontal visual recognition point 131, the second frontal visual recognition point 132, and the third frontal visual recognition point 133. The frontal visual recognition point 131, the fourth frontal visual recognition point 134, and the fifth frontal visual recognition point 135 can directly obtain the position information of the right eyeglass frame 114. Combined with the left pupil center and the right pupil center of the eyeglasses wearer, it is helpful to determine the relative position of the left pupil center and the left eyeglass frame 112, as well as the relative position of the right pupil center and the right eyeglass frame 114. Therefore, during the eyeglass manufacturing process, the position of the lens and the optical center of the lens can be adjusted so that the optical center of the lens is on the same straight line as the pupil center of the eyeglasses wearer when looking straight ahead, thereby improving the vision correction effect of the eyeglasses.

[0053] In one embodiment, the eyeglass frame 11 further includes a left end cap 111 and a right end cap 115. The left end cap 111 is movably disposed on the left side of the left eyeglass frame 112, and the right end cap 115 is movably disposed on the right side of the right eyeglass frame 114. The two temples 12 are rotatably connected to the left end cap 111 and the right end cap 115, respectively.

[0054] The distance between the two temples 12 is adjusted by moving the left and right ends of the left end 111 and the right end 115, thereby adapting to the face width of different eyeglass wearers and obtaining a suitable face width size.

[0055] In one embodiment, the frontal visual recognition point includes a sixth frontal visual recognition point 136 and a seventh frontal visual recognition point 137. The sixth frontal visual recognition point 136 is located on the front of the left pile head 111, and the seventh frontal visual recognition point 137 is located on the front of the right pile head 115. The side visual recognition point includes a second side visual recognition point 141. The second side visual recognition point 141 is provided on the side of both the left pile head 111 and the right pile head 115.

[0056] The face width data of the eyeglasses wearer can be obtained by measuring the distance between the sixth frontal visual recognition point 136 and the seventh frontal visual recognition point 137. Based on this face width data, the position of the left and right temples or the width of the eyeglass frame can be adjusted during the manufacturing of the eyeglasses, thereby adapting the distance between the two temples to the face width of the eyeglasses wearer and improving wearing comfort. The second lateral visual recognition point 141 is used in conjunction with the first lateral visual recognition point 138 to identify the position of the eyeglass frame 11 in the lateral image of the eyeglasses wearer's head, and can also be used to assist in the detection of temple length parameters.

[0057] As shown in Figure 6, in one embodiment, the left pile head 111 is provided with a plurality of left positioning holes spaced apart along the horizontal direction, and the left eyeglass frame 112 is provided with a left elastic protrusion. The left elastic protrusion can be selectively embedded into one of the plurality of left positioning holes to temporarily position the left pile head 111; the right pile head 115 is provided with a plurality of right positioning holes spaced apart along the horizontal direction, and the right eyeglass frame 114 is provided with a right elastic protrusion. The right elastic protrusion can be selectively embedded into one of the plurality of right positioning holes to temporarily position the right pile head 115.

[0058] The left eyeglass frame 112 is provided with a horizontally penetrating left slot, and the left post 111 can be horizontally displaced and inserted into the left slot. When it is necessary to change or adjust the horizontal position of the left post 111, the left post 111 can be pulled, and the left elastic protrusion is inserted into the left positioning hole to achieve temporary positioning. The right eyeglass frame 114 is provided with a horizontally penetrating right slot, and the right post 115 can be horizontally displaced and inserted into the right slot. When it is necessary to change or adjust the horizontal position of the right post 115, the right post 115 can be pulled, and the right elastic protrusion is inserted into the right positioning hole to achieve temporary positioning.

[0059] As shown in Figures 4 and 5, in one embodiment, the temple 12 includes a connecting segment 121 and a temple segment 122. One end of the connecting segment 121 is rotatably connected to the eyeglass frame 11 about a vertical axis for unfolding or folding the temple 12. The other end of the connecting segment 121 is rotatably connected to one end of the temple segment 122 about a horizontal axis, and the other end of the temple segment 122 forms an arc-shaped portion for supporting the ear.

[0060] The other end of the connecting segment 121 is connected to one end of the temple segment 122 by rotating up and down around a horizontal line as the axis of rotation. Thus, when the temple 12 is in the extended state, the relative angle between the temple 12 and the eyeglass frame 11 can be adjusted by adjusting the angle of rotation of the connecting segment 121, thereby controlling the relative angle between the plane of the eyeglass frame 11 and the plane of the face, so that it is within the appropriate angle range for the person wearing the glasses.

[0061] In one embodiment, an extension rod 124 is provided at the other end of the connecting segment 121. The extension rod 124 is provided with a positioning elastic protrusion 125. The extension rod 124 is inserted into the leg segment 122. The leg segment 122 is provided with a plurality of positioning round holes 123 at intervals. As the leg segment 122 rotates relative to the connecting segment 121, the positioning elastic protrusion 125 can be selectively embedded in one of the plurality of positioning round holes 123 to temporarily position the rotation angle of the leg segment 122.

[0062] Since the positioning elastic protrusion 125 rotates with the leg segment 122, its rotation trajectory lies on an arc line centered on the rotation point of the leg segment 122 and the connecting segment 121. Therefore, a plurality of positioning circular holes 123 are arranged on the arc line centered on the rotation point of the leg segment 122 and the connecting segment 121 to adapt to the rotation trajectory of the positioning elastic protrusion 125. The number and spacing of the positioning circular holes 123 can be adjusted according to the required rotation angle.

[0063] As shown in Figure 4, in one embodiment, the second visual recognition point 14 includes a third side visual recognition point 142 and a fourth side visual recognition point 143, which are located on the outer side of the leg segment 122 at intervals.

[0064] The third side visual recognition point 142 and the fourth side visual recognition point 143 are used to identify the position of the leg segment 122. Specifically, the line connecting the third side visual recognition point 142 and the fourth side visual recognition point 143 is the central axis of the leg segment 122.

[0065] As shown in Figures 3 and 7, in one embodiment, the eyeglass frame 11 further includes a first nose pad 16, a second nose pad 17, and a knob 15. The knob 15 is rotatably mounted on the bridge of the nose 113. The first nose pad 16 and the second nose pad 17 are slidably mounted on the bridge of the nose 113. The first nose pad 16 has a first slotted hole 161, and the second nose pad 17 has a second slotted hole 171. The knob 15 is provided with a first post 151 and a second post 152. The first post 151 and the second post 152 are respectively inserted into the first slotted hole 161 and the second slotted hole 171. The rotation of the knob 15 causes the first nose pad 16 and the second nose pad 17 to move closer to or further away from each other.

[0066] By adjusting the distance between the first nose pad 16 and the second nose pad 17, the nose bridge width of different eyeglass wearers can be adapted to ensure the adaptability of the visual recognition glasses 1 to different eyeglass wearers.

[0067] Another embodiment of the present invention provides a method for detecting eyeglass fitting parameters, which uses the eyeglass fitting parameter detection system described above and includes the following operations:

[0068] Glasses adjustment and fitting: The person wearing the visual recognition glasses adjusts the distance between the two temples. With the temples extended, the angle between the temples and the plane of the eyeglass frame is adjusted to fit the visual recognition glasses to the person wearing the glasses.

[0069] The head of the person wearing the visual recognition glasses is placed at the lens fitting camera device. A frontal image of the head of the person wearing the glasses is obtained through the front camera, and a side image of the head of the person wearing the glasses is obtained through the side camera.

[0070] The facial information, positional information of multiple first visual recognition points, and positional information of multiple second visual recognition points of the subject to be fitted for glasses are obtained from the frontal and side images of the head. The fitting parameters are then obtained based on the facial information, positional information of multiple first visual recognition points, and positional information of multiple second visual recognition points of the subject to be fitted for glasses.

[0071] This method for detecting lens fitting parameters first adjusts the adaptable visual recognition glasses to obtain a result suitable for the lens fitting subject. Then, by identifying the positional information of multiple first visual recognition points and multiple second visual recognition points on the adjusted visual recognition glasses, and combining this with the facial information of the lens fitting subject, the optimal lens fitting parameters are obtained, thereby effectively improving the lens fitting effect. At the same time, this method not only detects the first visual recognition points located on the eyeglass frame, but also detects the second visual recognition points located on the temples. This allows for a comprehensive consideration of the influence of the relative positions of the eyeglass frame and temples on the wearing fit, ensuring that the glasses prepared according to the lens fitting parameters fit the wearing effect of the visual recognition glasses more closely.

[0072] In one embodiment, the facial information includes the center positions of the left and right pupils and the bridge of the nose in a frontal image of the head, as well as the position information of the temple support point in a side image of the head. The temple support point position information is the contact point position information between the ear and the temple of the eyeglasses. The fitting parameters include face width, bridge of the nose, interpupillary distance, left interpupillary distance, right interpupillary distance, and temple length. The face width is the distance between the sixth frontal visual recognition point on the front of the left end and the seventh frontal visual recognition point on the front of the right end. The interpupillary distance is the distance between the center of the left and right pupils of the person receiving the glasses. The left interpupillary distance is the distance from the first frontal visual recognition point on the bridge of the nose to the center of the left pupil of the person receiving the glasses. The right interpupillary distance is the distance from the first frontal visual recognition point on the bridge of the nose to the center of the right pupil of the person receiving the glasses. The temple length is the distance from the contact point position to the second side visual recognition point.

[0073] When making eyeglasses, the fitting parameters include: "face width" as a reference for adjusting the distance between the two temples, which can be adjusted by adjusting the width of the eyeglass frame itself or by adjusting the relative positions of the left and right temples to make the distance between the two temples match the face width of the wearer, thus improving wearing comfort; "bridge width" is used to adjust the width between the nose pads to fit the bridge of the wearer's nose; "pupillary distance, left pupillary distance, and right pupillary distance" are used to adjust the position of the lenses so that their optical centers correspond to the left and right pupils; and "temple length" is used to determine the length of the temples to avoid them being too long or too short.

[0074] In one embodiment, the lens fitting parameters further include the relative position of the left pupil and the relative position of the right pupil. The relative position of the left pupil is the relative position of the center of the left pupil with respect to the first frontal visual recognition point, the second frontal visual recognition point, and the third frontal visual recognition point. The relative position of the right pupil is the relative position of the center of the right pupil with respect to the first frontal visual recognition point, the fourth frontal visual recognition point, and the fifth frontal visual recognition point.

[0075] By obtaining the relative positions of the left and right pupils, the optical center of the lens can be adjusted during the manufacturing process to align with the relative positions of the left and right pupils, thereby ensuring the optical correction effect of the glasses.

[0076] In one embodiment, the facial information includes eye position information located in a side-view image of the head, wherein the eye position information is the position information of the outermost point of the eyeball in the side-view image of the head, and the lens fitting parameters include frame distance and temple angle, wherein the frame distance is the distance from the eyeball position to the first side-view visual recognition point, and the temple angle is obtained by the following method:

[0077] The plane position of the eyeglass frame is determined by the first and second side visual recognition points, and the position of the temples is determined by the third and fourth side visual recognition points. The relative angle between the temples and the eyeglass frame is obtained based on the first, second, third, and fourth side visual recognition points.

[0078] The temple angle is used to provide a reference for setting the angle between the temple and the eyeglass frame during eyeglass manufacturing, so as to ensure that the angle between the eyeglass lens and the face of the person wearing the eyeglasses is consistent with the visual recognition eyeglasses when the eyeglasses are worn, thus ensuring the eyeglass fitting effect.

[0079] It should be noted that facial information, the positional information of multiple first visual recognition points, and the positional information of multiple second visual recognition points can be identified and confirmed by machine vision recognition software, such as the center position of the left pupil, the center position of the right pupil, the first visual recognition point, and the second visual recognition point. Some parts that are difficult to achieve through existing machine vision recognition software can be determined with manual assistance. For example, the positional information of the support point of the glasses temple can be manually identified and the specific position points can be marked through the side image of the head.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A system for detecting eyeglass fitting parameters, characterized in that, Including eyeglass camera devices and visual recognition glasses; The visual recognition glasses include an eyeglass frame and two temples. The two temples are connected to the two sides of the eyeglass frame at an adjustable distance. When the temples are extended, the angle between the temples and the plane of the eyeglass frame is adjustable. The eyeglass frame is provided with a plurality of first visual recognition points, and the temples are provided with a plurality of second visual recognition points. The eyeglass fitting camera device includes a front camera and a side camera. The front camera is used to acquire a frontal image of the head of the person wearing the visual recognition glasses, and the side camera is used to acquire a side image of the head of the person wearing the visual recognition glasses.

2. The eyeglass fitting parameter detection system according to claim 1, characterized in that, The lens fitting camera device includes a support frame, which is a semi-enclosed structure with an opening on one side. The support frame includes an inner wall, a left wall, and a right wall. The two sides of the inner wall are respectively connected to the left wall and the right wall to form a semi-enclosed structure with an opening on one side. The front camera is disposed on the inner wall facing the opening, and the side camera is disposed on the left wall or the right wall.

3. The eyeglass fitting parameter detection system according to claim 2, characterized in that, The support frame also includes a base plate and a head support component. The inner side wall, the left side wall, and the right side wall are all connected to the base plate. The head support component is located on the base plate and is used for head support and positioning of the person receiving eyeglasses.

4. The eyeglass fitting parameter detection system according to claim 1, characterized in that, The plurality of first visual recognition points include frontal visual recognition points and side visual recognition points, wherein the frontal visual recognition points are located on the front of the eyeglasses frame and the side visual recognition points are located on the side of the eyeglasses frame; The eyeglass frame includes a bridge, a left frame, and a right frame. The left frame is located on the left side of the bridge and the right frame is located on the right side of the bridge. The frontal visual recognition points include a first, a second, a third, a fourth, and a fifth frontal visual recognition point. The first frontal visual recognition point is located on the bridge, the second is located at the lower left of the left frame, the third is located at the upper left of the left frame, the fourth is located at the lower right of the right frame, and the fifth is located at the upper right of the right frame. The side visual recognition points include a first side visual recognition point, which is located at the center of the side of both the left and right frames. The eyeglass frame also includes a left end and a right end. The left end is movably disposed on the left side of the left eyeglass frame, and the right end is movably disposed on the right side of the right eyeglass frame. The two temples are rotatably connected to the left end and the right end, respectively. The frontal visual recognition points include a sixth frontal visual recognition point and a seventh frontal visual recognition point. The sixth frontal visual recognition point is located on the front of the left pile head, and the seventh frontal visual recognition point is located on the front of the right pile head. The side visual recognition points include a second side visual recognition point. The second side visual recognition point is provided on the side of both the left pile head and the right pile head.

5. The eyeglass fitting parameter detection system according to claim 1, characterized in that, The temple of the glasses includes a connecting section and a temple section. One end of the connecting section is rotatably connected to the eyeglass frame about a vertical axis of rotation, and the other end of the connecting section is rotatably connected to one end of the temple section about a horizontal axis of rotation. The other end of the temple section forms an arc-shaped part for supporting the upper part of the ear. The second visual recognition point includes a third side visual recognition point and a fourth side visual recognition point, which are spaced apart on the outer side of the leg segment.

6. The eyeglass fitting parameter detection system according to claim 1, characterized in that, The eyeglass frame also includes a first nose pad, a second nose pad, and a knob. The knob is rotatably mounted on the bridge of the nose. The first and second nose pads are slidably mounted on the bridge of the nose. The first nose pad has a first strip-shaped hole, and the second nose pad has a second strip-shaped hole. The knob is provided with a first post and a second post. The first post and the second post are respectively inserted into the first strip-shaped hole and the second strip-shaped hole. The rotation of the knob causes the first and second nose pads to move closer to or further away from each other.

7. A method for detecting eyeglass fitting parameters, characterized in that, The application of the eyeglass fitting parameter detection system as described in any one of claims 1 to 6 includes the following operations: Glasses adjustment and fitting: The person wearing the visual recognition glasses adjusts the distance between the two temples. With the temples extended, the angle between the temples and the plane of the eyeglass frame is adjusted to fit the visual recognition glasses to the person wearing the glasses. The head of the person wearing the visual recognition glasses is placed at the lens fitting camera device. A frontal image of the head of the person wearing the glasses is obtained through the front camera, and a side image of the head of the person wearing the glasses is obtained through the side camera. The facial information, positional information of multiple first visual recognition points, and positional information of multiple second visual recognition points of the subject to be fitted for glasses are obtained from the frontal and side images of the head. The fitting parameters are then obtained based on the facial information, positional information of multiple first visual recognition points, and positional information of multiple second visual recognition points of the subject to be fitted for glasses.

8. The method for detecting eyeglass fitting parameters according to claim 7, characterized in that, The facial information includes the center positions of the left and right pupils and the bridge of the nose in the frontal image of the head, as well as the position information of the temple support point in the side image of the head. The temple support point position information is the contact point between the ear and the temple of the eyeglasses. The fitting parameters include face width, bridge of the nose, interpupillary distance, left interpupillary distance, right interpupillary distance, and temple length. The face width is the distance between the sixth frontal visual recognition point on the front of the left end and the seventh frontal visual recognition point on the front of the right end. The interpupillary distance is the distance between the center of the left and right pupils of the person receiving the glasses. The left interpupillary distance is the distance from the first frontal visual recognition point on the bridge of the nose to the center of the left pupil of the person receiving the glasses. The right interpupillary distance is the distance from the first frontal visual recognition point on the bridge of the nose to the center of the right pupil of the person receiving the glasses. The temple length is the distance from the contact point to the second side visual recognition point.

9. The method for detecting eyeglass fitting parameters according to claim 8, characterized in that, The lens fitting parameters also include the relative position of the left pupil and the relative position of the right pupil. The relative position of the left pupil is the relative position of the center of the left pupil with respect to the first, second, and third frontal visual recognition points. The relative position of the right pupil is the relative position of the center of the right pupil with respect to the first, fourth, and fifth frontal visual recognition points.

10. The method for detecting eyeglass fitting parameters according to claim 7, characterized in that, The facial information includes eye position information in the side-view image of the head, wherein the eye position information is the position information of the outermost point of the eyeball in the side-view image of the head. The lens fitting parameters include frame distance and temple angle, wherein the frame distance is the distance from the eyeball position to the first side-view visual recognition point, and the temple angle is obtained by the following method: The plane position of the eyeglass frame is determined by the first and second side visual recognition points, and the position of the temples is determined by the third and fourth side visual recognition points. The relative angle between the temples and the eyeglass frame is obtained based on the first, second, third, and fourth side visual recognition points.

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