CN107576263A - A kind of vision measurement specular light disturbance restraining method - Google Patents
A kind of vision measurement specular light disturbance restraining method Download PDFInfo
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- CN107576263A CN107576263A CN201710179701.XA CN201710179701A CN107576263A CN 107576263 A CN107576263 A CN 107576263A CN 201710179701 A CN201710179701 A CN 201710179701A CN 107576263 A CN107576263 A CN 107576263A
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Abstract
The present invention discloses a kind of vision measurement specular light disturbance restraining method, this method is different from existing method and is imaged using handmarking's point surface reflection, but utilize exciting radiation photoimaging of handmarking's point under specific light source, and pass through light path gating method, block specular light, only receive artificial mark point excited radiation light, so as to eliminate glare interference problem caused by specular light, vision measurement system robustness is lifted, avoids glare from disturbing the problem of leading to not measure or causing erroneous measurements.
Description
Technical field
The invention belongs to technical field of visual measurement, a kind of vision measurement specular light disturbance restraining method of feature.
Background technology
Stereo vision measuring technology general principle using two light sources (1-1,1-2) as shown in figure 1, illuminate measurand
(2) white circular handmarking's point (3) of surface mount, using two video camera (4-1,4-2) sync pulse jamming measurand tables
The image of dough figurine work mark point (3), handmarking's point center of circle image coordinate is identified and positioned in shooting image, passes through Three-dimensional Gravity
Build to obtain handmarking's point center of circle three-dimensional coordinate, and then realize that measurand pastes the three-dimensional coordinate survey of handmarking's point opening position
Amount, and the information such as the position of measurand, posture, deformation are obtained with this.The technology has been widely used in industry manufacture, machinery
The numerous areas such as processing and assembling, Aero-Space, military mapping, aerodynamics experiment.
In actual applications, it is often necessary to mirror surface object is measured, these smooth subject surfaces easily form specular light,
The very big difficulty to vision measurement band.When video camera, light source, measurand surface form mirror-reflection, specular light enters
Enter and glare is produced in video camera, glare makes video camera supersaturation, forms highlighted white portion in the picture, with white handmarking
Point diagram image brightness is similar, and difficulty is caused to identifying and positioning handmarking's point in the picture.In addition, when areas of specular reflection compared with
Greatly, when intensity of reflected light is higher, white artificial mark point can also be submerged in caused by glare and highlights in white portion, so as to root
Originally handmarking's point can not be found in the picture, the problem of leading to not obtain measurement data.
The essential reason of glare interference problem is produced in vision measurement is：Existing vision measurement imaging method uses reflected light
Imaging.It is imaged as shown in Fig. 2 launching reflection light (6) of the light (5) on handmarking's point surface using light source (1), when tested
When subject surface has areas of specular reflection, mirror-reflection light (7) can also enter video camera, produce glare interference problem.Cause
This, it is necessary to change the characteristic of handmarking's point surface reflection line (6) and measurand surface specular reflections light (7), and root
According to their different qualities, mirror-reflection light (7) is blocked by light path gating technique, could solve glare interference problem.Mesh
Before, for the problem, photographic circle is mainly used to slacken specular light interference using polarization imaging technology.Polarization imaging is according to quilt
Surveying subject surface diffusing reflection light and mirror-reflection light, there are different polarization states to be used to eliminate specular light.Reflection light
Polarization state is determined by factors such as material surface attribute and incidence angles, when their polarization characteristic has overlapping, glare interference suppression
Less effective processed.Therefore, in actual applications, polarization imaging method can not be completely eliminated glare caused by mirror-reflection and disturb
Problem.In addition, (recognition and tracking of index point and wing elastic deformation measurement Central China science and technology are big in wind-tunnel environment by Liu Qinglong etc.
Learn Master's thesis .2013) it can be compensated out in partial frame and lost by the method for handmarking's point position tracking in multiple image
Handmarking's point position.But the method for the proposition such as Liu Qinglong depends on handmarking's point position history in multiple image to believe
Breath, when a certain handmarking's point is all submerged in all images or during only 1 two field picture, it will be unable to handle.
The content of the invention
The purpose of the present invention is to solve specular light interference problem in vision measurement, there is provided a kind of new visual imaging
Method.
The present invention solves the above problems the technical scheme of use：As shown in figure 3, it is used for using ultraviolet or purple light source (10)
Illumination, the wavelength of light source (10) is a1, and span is：200~400nm；On measurand (2) surface, using fluorescent material
(8) fluorescence handmarking's point (9) is made, fluorescence handmarking point (9) surface fluorescence material (8) launches light in light source (10)
(11) lower outwards radiofluorescence (12) is excited, fluorescence (12) wavelength is a2, and span is：400~1000nm, a2>a1；According to
Light source (10) launches light (11) wavelength a1 and fluorescence (12) wavelength a2, uses and is used as the by wavelength for a2 narrow band pass filter
One optical filter (14), the first optical filter (14) is placed in video camera (4) front end, the first optical filter (14) blocks light source (10) transmitting
Light (11) is launched in the specular light (13) on measurand (2) surface, by fluorescence handmarking point (9) in light source (10)
Light (11) excites the fluorescence (12) of lower radiation, makes fluorescence of the video camera (4) only to fluorescence handmarking point (9) surface emissivity
(12) it is imaged, the specular light (13) on measurand (2) surface is not imaged, eliminates mirror-reflection glare.
When (such as some the inexpensive UV light sources transmittings of other color of light in light source (10) transmitting light (11) of use being present
Visible ray is generally comprised in light, other color visibles are included in blue-light source transmitting light), i.e., wave-length coverage exceeds 200
During~400nm, the second optical filter is used as by the narrow band pass filter that wavelength is a1 as shown in figure 4, being set in light source (10) front end
(15) other color of light in light source (10) transmitting light (11), are eliminated as illuminating ray (16), are reduced by illuminating ray
(16) the overlapping wavelengths scope of specular light caused by (13) and fluorescence handmarking point (9) radiofluorescence (12), mirror is lifted
Glare interference suppressioning effect is reflected in face.
It is of the invention to be using the general principle of exciting radiation imaging method：The fluorescent materials such as oil, rare earth ion, ultraviolet
(UV), can outside radiofluorescence or under blue ray irradiation.In general, it is more than lighting source ripple to the wavelength of fluorescence of external radiation
It is long.Therefore, reasonable selection fluorescent material, the wave-length coverage a1 of lighting source and radiofluorescence wavelength a2 scopes can be made not overlapping.
On this basis, then by wavelength of light gating method, video camera is only shot radiofluorescence, block specular light, eliminate
Glare caused by mirror-reflection is disturbed.Exciting radiation image-forming principle is as shown in figure 3, artificial using fluorescent material (8) making fluorescence
Mark point (9), ultraviolet (UV) or blue-light source (10), make fluorescence handmarking point (9) in ultraviolet (UV) or blue-light source (10)
Launch the lower generation fluorescence (12) of light (11) irradiation, according to the wavelength difference of source light (11) and fluorescence (12), using wavelength
Gating method, set in video camera (4) front end and the first optical filter (14) is used as by the narrow band pass filter of fluorescence (12) wavelength, used
In blocking mirror sections reflected light (13), only receive the fluorescence (12) of artificial mark point surface emissivity, you can eliminate mirror-reflection
Caused glare interference problem.
Beneficial effect of the present invention：
The existing specular light generation of visual imaging measurement is carried out for existing method using handmarking's point reflection light to dazzle
Light interference problem, the present invention use exciting radiation imaging method and wavelength gating method, block strong caused by areas of specular reflection
Reflected light, can fundamentally solve glare interference problem caused by the mirror-reflection in vision measurement, lift vision measurement system
Robustness and availability, avoid glare interference generation the problem of can not measuring or producing erroneous measurements.
Brief description of the drawings
Fig. 1 binocular stereo visions measure
Fig. 2 reflects photoimaging
Fig. 3 exciting radiations are imaged
Fig. 4 low cost optical source excitation radiant images
In figure：1st, light source, 2, measurand, 3, handmarking's point, 4, video camera, 5, source emissioning light line, 6, handmarking's point
Reflection light, 7, measurand surface specular reflections light, 9, fluorescence handmarking point, 10, ultraviolet (UV) or blue-light source,
11st, ultraviolet (UV) or blue-light source launch light, and 12, the fluorescence of fluorescence handmarking point radiation, 13, ultraviolet (UV) or blue light
Light is launched in the specular light on measurand surface in source, the 14, first optical filter, the 15, second optical filter, and 16, by second
The filtered light source 10 of optical filter (15) emits light as illuminating ray.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment 1
Light source 10 uses 365nm ultraviolet sources, and optical filter 15 selects 365nm narrow band pass filters, selects green emitting phosphor to make circle
Shape fluorescence handmarking point 9, the centre wavelength of fluorescence 12 is 532nm, and optical filter 14 selects 532nm narrow band pass filters, optical filter
15 and the wave-length coverage of optical filter 14 it is not overlapping.
After filtered 15 gating of the ultraviolet light that light source 10 is sent, other color lights are eliminated, spectral energy concentrates on
365nm is interior nearby, is to external radiation fluorescence 12, the centre wavelength of fluorescence 12 after the surface fluorescence powder of irradiation fluorescence handmarking point 9
532nm, optical filter 14 only by 532nm fluorescence, block 365nm ultraviolet lights, so as to avoid minute surface caused by areas of specular reflection
Reflected light.
Embodiment 2
Light source 10 uses 280nm ultraviolet sources, and optical filter 15 selects 280nm narrow band pass filters, selects green emitting phosphor to make circle
Shape fluorescence handmarking point 9, the centre wavelength of fluorescence 12 is 532nm, and optical filter 14 selects 532nm narrow band pass filters, optical filter
14 and the wave-length coverage of optical filter 15 it is not overlapping.
After filtered 15 gating of the ultraviolet light that light source 10 is sent, other color of light are eliminated, spectral energy concentrates on
Near 280nm, it is to external radiation fluorescence 12, the centre wavelength of fluorescence 12 after irradiation fluorescence 9 surface fluorescence powder of handmarking
532nm, optical filter 14 only by 532nm fluorescence 12, block 280nm ultraviolet lights, so as to avoid mirror caused by areas of specular reflection
Face reflected light.
Embodiment 3
Light source 10 uses 365nm ultraviolet sources, and optical filter 15 selects 365nm narrow band pass filters, selects red fluorescence powder to make circle
Shape fluorescence handmarking point 9, the centre wavelength of fluorescence 12 are 650nm, and optical filter 14 selects 650nm narrow band pass filters, optical filter 14
It is not overlapping with the wave-length coverage of optical filter 15.
After filtered 15 gating of the ultraviolet light that light source 10 is sent, other color of light are eliminated, spectral energy concentrates on
Near 365nm, it is to external radiation fluorescence 12, the centre wavelength of fluorescence 12 after the surface fluorescence powder of irradiation fluorescence handmarking point 9
650nm, optical filter 14 only by 650nm fluorescence 12, block 365nm ultraviolet lights, so as to avoid mirror caused by areas of specular reflection
Face reflected light.
Embodiment 4
Light source 10 uses 280nm light sources, and optical filter 15 selects 280nm narrow band pass filters, selects red fluorescence powder to make fluorescence circle
Shape handmarking point 9, the centre wavelength of fluorescence 12 are 650nm, and optical filter 14 selects 650nm narrow band pass filters, optical filter 14 and filter
The wave-length coverage of mating plate 15 is not overlapping.
After filtered 15 gating of the ultraviolet light that light source 10 is sent, other color of light are eliminated, spectral energy concentrates on
Near 280nm, it is to external radiation fluorescence 12, the centre wavelength of fluorescence 12 after the surface fluorescence powder of irradiation fluorescence handmarking point 9
650nm, optical filter 14 only by 650nm fluorescence, block 280nm ultraviolet lights, so as to avoid minute surface caused by areas of specular reflection
Reflected light.
Embodiment 5
Light source 10 uses 400nm blue-light sources, and optical filter 15 selects 400nm narrow band pass filters, selects green emitting phosphor to make glimmering
Light circle handmarking point 9, the centre wavelength of fluorescence 12 are 532nm, and optical filter 14 selects 532nm narrow band pass filters, optical filter 14
It is not overlapping with the wave-length coverage of optical filter 15.
After filtered 15 gating of the blue light that light source 10 is sent, other color of light are eliminated, spectral energy concentrates on 400nm
Near, to external radiation fluorescence 12 after the surface fluorescence powder of irradiation fluorescence handmarking point 9, the centre wavelength of fluorescence 12 is 532nm, filter
Mating plate 14 only by 532nm fluorescence, blocks 400nm purple lights, so as to avoid specular light caused by areas of specular reflection.
Claims (1)
1. a kind of vision measurement specular light disturbance restraining method, it is characterized in that：It is used for using ultraviolet or purple light source (10)
Illumination, the wavelength of light source (10) is a1, and span is 200~400nm；On measurand (2) surface, using fluorescent material
(8) fluorescence handmarking's point (9) is made, fluorescence handmarking point (9) surface fluorescence material (8) launches light in light source (10)
(11) lower outwards radiofluorescence (12) is excited, fluorescence (12) wavelength is a2, and span is 400~1000nm, a2>a1；According to
Light source (10) launches light (11) wavelength a1 and fluorescence (12) wavelength a2, uses and is used as the by wavelength for a2 narrow band pass filter
One optical filter (14), the first optical filter (14) is placed in video camera (4) front end, the first optical filter (14) blocks light source (10) transmitting
Light (11) is launched in the specular light (13) on measurand (2) surface, by fluorescence handmarking point (9) in light source (10)
Light (11) excites the fluorescence (12) of lower radiation, makes fluorescence of the video camera (4) only to fluorescence handmarking point (9) surface emissivity
(12) it is imaged, the specular light (13) on measurand (2) surface is not imaged, eliminates mirror-reflection glare；When the light of use
Other color of light in source (10) transmitting light (11) be present, i.e., when wave-length coverage exceeds 200~400nm, in light source (10) front end
Set and the second optical filter (15) is used as by the narrow band pass filter that wavelength is a1, eliminate its in light source (10) transmitting light (11)
His color of light is manually marked as illuminating ray (16) with reducing the specular light (13) as caused by illuminating ray (16) with fluorescence
Remember the overlapping wavelengths scope of point (9) radiofluorescence (12), lift specular light interference suppressioning effect.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595468A (en) * | 2019-09-25 | 2019-12-20 | 中国地质科学院地球物理地球化学勘查研究所 | Three-component induction coil attitude measurement system and method based on deep learning |
| CN111623725A (en) * | 2019-02-27 | 2020-09-04 | 杭州思看科技有限公司 | Tracking type three-dimensional scanning system |
| CN115046478A (en) * | 2022-08-10 | 2022-09-13 | 深之蓝海洋科技股份有限公司 | Underwater relative pose measuring method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305778A (en) * | 2011-05-17 | 2012-01-04 | 易定容 | Micro-multispectral fluorescence reception and treatment system |
| CN106153010A (en) * | 2016-07-25 | 2016-11-23 | 上海交通大学 | Anti-sunshine vision detection system and method based on LED and reflex reflection |
-
2017
- 2017-03-23 CN CN201710179701.XA patent/CN107576263A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305778A (en) * | 2011-05-17 | 2012-01-04 | 易定容 | Micro-multispectral fluorescence reception and treatment system |
| CN106153010A (en) * | 2016-07-25 | 2016-11-23 | 上海交通大学 | Anti-sunshine vision detection system and method based on LED and reflex reflection |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623725A (en) * | 2019-02-27 | 2020-09-04 | 杭州思看科技有限公司 | Tracking type three-dimensional scanning system |
| CN111623725B (en) * | 2019-02-27 | 2022-04-29 | 杭州思看科技有限公司 | Tracking type three-dimensional scanning system |
| CN110595468A (en) * | 2019-09-25 | 2019-12-20 | 中国地质科学院地球物理地球化学勘查研究所 | Three-component induction coil attitude measurement system and method based on deep learning |
| CN110595468B (en) * | 2019-09-25 | 2021-05-07 | 中国地质科学院地球物理地球化学勘查研究所 | Three-component induction coil attitude measurement system and method based on deep learning |
| CN115046478A (en) * | 2022-08-10 | 2022-09-13 | 深之蓝海洋科技股份有限公司 | Underwater relative pose measuring method and device |
| CN115046478B (en) * | 2022-08-10 | 2022-12-02 | 深之蓝海洋科技股份有限公司 | Underwater relative pose measuring method and device |
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Application publication date: 20180112 |
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