CN107665343B - Inner canthus distance measuring system for correcting interference of myopia glasses - Google Patents
Inner canthus distance measuring system for correcting interference of myopia glasses Download PDFInfo
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- CN107665343B CN107665343B CN201711009469.1A CN201711009469A CN107665343B CN 107665343 B CN107665343 B CN 107665343B CN 201711009469 A CN201711009469 A CN 201711009469A CN 107665343 B CN107665343 B CN 107665343B
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- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
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- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/161—Detection; Localisation; Normalisation
- G06V40/165—Detection; Localisation; Normalisation using facial parts and geometric relationships
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Abstract
The invention relates to the technical field of face recognition equipment; an inner canthus space measuring system for correcting interference of myopia glasses comprises a channel clamping table, a measuring camera array, a left correction camera array, a right correction camera array, a left correction target and a right correction target; the two channel clamping tables are arranged left and right, and a channel is formed in the middle of the channel clamping tables; taking one point in the middle of the channel as an observation point, arranging a measurement camera array along the direction of the channel in the right front direction, arranging a plurality of measurement cameras in an equal angle manner relative to the measurement point along the horizontal direction, respectively arranging correction camera arrays on a left channel clamp platform and a right channel clamp platform, and arranging correction target plates on the opposite sides of the correction cameras relative to the observation point; the invention realizes the function of correcting the inner canthus distance value interfered by the myopia glasses in the face recognition process, so that the data can be used for face recognition in public occasions such as security inspection and the like, and the overall recognition rate and the recognition accuracy of the face recognition system are improved.
Description
The technical field is as follows:
the invention relates to the technical field of face recognition equipment.
Background art:
in the field of face recognition, the inner canthus spacing is one of important recognition parameters, and when the inner canthus spacing is used for a face recognition algorithm, the inner canthus spacing has the characteristics of low expression correlation degree, difficulty in changing along with the age and the fat and thin problems, no change by makeup, less relation to a face-lifting project, very clear positioning and identifying characteristics, and is very suitable for operation for improving the face recognition accuracy.
At present, a considerable number of people wear myopia glasses due to the myopia problem, measurement interference is actually caused to the inner canthus distance, if the myopia glasses are not taken off, the measured inner canthus distance value can be larger than the actual value through a measurement camera, data failure identification failure can be caused when data of wearing the myopia glasses are not stored, and the problem of insufficient identification rate exists when the myopia glasses are applied to public safety facilities such as airport security inspection and other environments, so that the myopia glasses are often excluded from an algorithm.
The invention content is as follows:
in view of the above, there is a need to provide a measurement system design for face recognition that corrects for near vision lens interference.
An inner canthus space measuring system for correcting interference of myopia glasses comprises a channel clamping table, a measuring camera array, a left correction camera array, a right correction camera array, a left correction target and a right correction target; the two channel clamping tables are arranged left and right, and a channel is formed in the middle of the channel clamping tables; taking one point in the middle of the channel as an observation point, setting a measurement camera array by the observation point pointing to the right front along the channel, wherein the measurement camera array is formed by arranging a plurality of measurement cameras in an equal angle relative to the measurement point along the horizontal direction; a left correction camera array is arranged at the upper rear part of the left channel clamping table, and a plurality of correction cameras are arranged at equal angles relative to the measuring points along the horizontal direction in the left correction camera array; a right correction camera array is arranged at the upper rear part of the right channel clamping table, and a plurality of correction cameras are arranged at equal angles relative to the measuring points along the horizontal direction in the right correction camera array; a right correction target is arranged on the opposite side of the left correction camera array relative to the measuring point, the right correction target is a cambered surface, and the distance between each position on the right correction target and the longitudinal axis of the measuring point is equal; and a left correction target is arranged on the opposite side of the right correction camera array relative to the measuring point, the left correction target is a cambered surface, and the distance between each part of the left correction target and the longitudinal axis of the measuring point is equal.
When the device works, a tested person passes through a channel between channel clamping platforms, and when reaching an observation point, a system reaction is triggered to carry out observation; each measuring camera in the measuring camera array independently gives a reading to the inner canthus distance of a measured person, the face recognition computing system selects the maximum value in each reading, and records the number of the measuring camera obtaining the reading, and the number corresponds to the included angle between the face axis and the channel axis when the measured person passes through an observation point; meanwhile, each correction camera in the left correction camera array positioned at the left rear of the observation point individually identifies and shoots a right correction target through a left lens of a myopia lens to obtain an image distortion parameter, each correction camera in the right correction camera array positioned at the right rear of the observation point individually identifies and shoots a left correction target through a right lens of the myopia lens to obtain an image distortion parameter, the face recognition computing system selects corresponding left and right image distortion parameters according to the included angle between the face axis and the channel axis when the measured person passes through the observation point, looks up the table to obtain the degrees of the left and right lenses and corresponding correction values, and corrects the maximum value of the inner-eye angular spacing degrees of the measured person, so that a more accurate actual value of the inner-eye angular spacing of the measured person is obtained and is used for a subsequent face recognition algorithm.
Preferably, the number of the measuring cameras in the measuring camera array is the same as the number of the correcting cameras in the left correcting camera array and the number of the correcting cameras in the right correcting camera array, the same clockwise or anticlockwise serial number can be adopted for each measuring camera, the correcting cameras in the left correcting camera array and the correcting cameras in the right correcting camera array, the same serial number left and right correcting camera data of the measuring camera with the maximum degree can be directly selected and obtained when distortion parameters are selected, table contents are simplified during subsequent table lookup, the identification speed is increased, and the measurement accuracy is improved.
Preferably, the positions of the correction cameras in the left correction camera array and the positions of the correction cameras in the right correction camera array in the same sequence are symmetrical relative to a channel, and the design can enable the distortion parameters of the left correction camera and the right correction camera to use the same table when the distortion parameters of the left correction camera and the right correction camera are used for table look-up, so that the recognition speed is further improved.
Preferably, the left correction target and the right correction target both adopt circle images which are arranged in a rectangular array and used for marking circle centers.
The inner canthus distance measuring system for correcting the interference of the myopia glasses realizes the function of correcting the inner canthus distance value interfered by the myopia glasses in the face recognition process, so that the data can be used for face recognition in public occasions such as security inspection and the like, and the overall recognition rate and the recognition accuracy of the face recognition system are improved.
Description of the drawings:
FIG. 1 is a schematic diagram of a specific embodiment of an intra-canthus distance measurement system for correcting near vision lens interference;
FIG. 2 is a schematic diagram of the deviation of the facial axis from the channel axis of an embodiment of the system for measuring the internal canthus distance for correcting near vision lens interference;
FIG. 3 is a schematic diagram of left and right correction targets of an inner canthus space measurement system for correcting interference of a myopia lens.
In the figure: the device comprises a channel clamping table 1, a channel 101, an observation point 102, a measurement camera array 2, a left correction camera array 3, a right correction camera array 4, a left correction target 5, a right correction target 6, a circle center 7 and a circular ring 8.
The specific implementation mode is as follows:
an inner canthus distance measuring system for correcting interference of myopia glasses comprises a channel clamping table 1, a measuring camera array 2, a left correcting camera array 3, a right correcting camera array 4, a left correcting target 5 and a right correcting target 6.
The two channel clamping tables 1 are arranged left and right, and a channel 101 is formed in the middle; and taking one point in the middle of the channel as an observation point 102, wherein the observation point 102 points to the right front along the channel 101 to set a measurement camera array 2, and 7 measurement cameras in the measurement camera array 2 are arranged at equal angles relative to the measurement point 102 along the horizontal direction.
A left correction camera array 3 is arranged at the upper rear part of the left channel clamping table, and 7 correction cameras are arranged in the left correction camera array 3 along the horizontal direction at equal angles relative to the measuring point 102; the right correction camera array 4 is arranged at the upper rear part of the right channel clamping table, 7 correction cameras are arranged in the right correction camera array 4 along the horizontal direction at equal angles relative to the measuring point 102, and the specific arrangement positions of the correction cameras are completely symmetrical relative to the channel 101 and the left correction camera array 3.
A right correction target 6 is arranged on the opposite side of the left correction camera array 3 relative to the measuring point 102, the right correction target 6 is a cambered surface, and the distance between each position on the cambered surface and the longitudinal axis of the measuring point 102 is equal; the left correction target 5 is arranged on the opposite side of the right correction camera array 4 relative to the measuring point, the left correction target 5 is a cambered surface, the distances between every part on the cambered surface and the longitudinal axis of the measuring point 102 are equal, and the left correction target 5 and the right correction target 6 both adopt an image of a mark circle center 7 and a circular ring 8 which are arranged in a rectangular array.
Claims (4)
1. The system for measuring the inner canthus distance for correcting the interference of the myopia glasses is characterized by comprising a channel clamping table, a measuring camera array, a left correction camera array, a right correction camera array, a left correction target and a right correction target;
the two channel clamping tables are arranged left and right, and a channel is formed in the middle of the channel clamping tables; taking one point in the middle of the channel as an observation point, setting a measurement camera array by the observation point pointing to the right front along the channel, wherein the measurement camera array is formed by arranging a plurality of measurement cameras in an equal angle relative to the measurement point along the horizontal direction;
a left correction camera array is arranged at the upper rear part of the left channel clamping table, and a plurality of correction cameras are arranged at equal angles relative to the measuring points along the horizontal direction in the left correction camera array; a right correction camera array is arranged at the upper rear part of the right channel clamping table, and a plurality of correction cameras are arranged at equal angles relative to the measuring points along the horizontal direction in the right correction camera array;
a right correction target is arranged on the opposite side of the left correction camera array relative to the measuring point, the right correction target is a cambered surface, and the distance between each position on the right correction target and the longitudinal axis of the measuring point is equal; and a left correction target is arranged on the opposite side of the right correction camera array relative to the measuring point, the left correction target is a cambered surface, and the distance between each part of the left correction target and the longitudinal axis of the measuring point is equal.
2. The system of claim 1, wherein the number of said measurement cameras in said measurement camera array is the same as the number of correction cameras in said left correction camera array and the number of correction cameras in said right correction camera array.
3. The system of claim 2, wherein the locations of each of the correction cameras in the left correction camera array are symmetrical with the locations of like-order correction cameras in the right correction camera array with respect to the channel.
4. The system of claim 1, wherein the left and right correction targets are circle images of circle with a center of circle arranged in a rectangular array.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711009469.1A CN107665343B (en) | 2017-10-25 | 2017-10-25 | Inner canthus distance measuring system for correcting interference of myopia glasses |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711009469.1A CN107665343B (en) | 2017-10-25 | 2017-10-25 | Inner canthus distance measuring system for correcting interference of myopia glasses |
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| CN107665343B true CN107665343B (en) | 2020-11-06 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103020579A (en) * | 2011-09-22 | 2013-04-03 | 上海银晨智能识别科技有限公司 | Face recognition method and system, and removing method and device for glasses frame in face image |
| CN103632136A (en) * | 2013-11-11 | 2014-03-12 | 北京天诚盛业科技有限公司 | Method and device for locating human eyes |
| CN105046230A (en) * | 2015-07-27 | 2015-11-11 | 上海交通大学 | Image based human canthus detection method and system |
| CN107184178A (en) * | 2017-06-26 | 2017-09-22 | 廖亮举 | A kind of hand-held vision drop instrument of intelligent portable and optometry method |
-
2017
- 2017-10-25 CN CN201711009469.1A patent/CN107665343B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103020579A (en) * | 2011-09-22 | 2013-04-03 | 上海银晨智能识别科技有限公司 | Face recognition method and system, and removing method and device for glasses frame in face image |
| CN103632136A (en) * | 2013-11-11 | 2014-03-12 | 北京天诚盛业科技有限公司 | Method and device for locating human eyes |
| CN105046230A (en) * | 2015-07-27 | 2015-11-11 | 上海交通大学 | Image based human canthus detection method and system |
| CN107184178A (en) * | 2017-06-26 | 2017-09-22 | 廖亮举 | A kind of hand-held vision drop instrument of intelligent portable and optometry method |
Non-Patent Citations (1)
| Title |
|---|
| "视线跟踪系统中的眼角点精确定位方法";高飞;《计算机工程》;20071231;第18卷(第33期);全文 * |
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