CN104101611A - Mirror-like object surface optical imaging device and imaging method thereof - Google Patents
Mirror-like object surface optical imaging device and imaging method thereof Download PDFInfo
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- CN104101611A CN104101611A CN201410250957.1A CN201410250957A CN104101611A CN 104101611 A CN104101611 A CN 104101611A CN 201410250957 A CN201410250957 A CN 201410250957A CN 104101611 A CN104101611 A CN 104101611A
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Abstract
The invention discloses a mirror-like object surface optical imaging device and an imaging method thereof. The device comprises a parallel light source, a grating, a camera, a computer and a light source controller for controlling the parallel light source. The camera is connected to the computer. The parallel light source and the grating cooperate to generate a non-uniform light source with light and dark stripes. According to refraction and reflection principles of light, by moving the non-uniform light source, the light and dark stripes can scan the total surface of a scanned object, and the camera is employed to acquire a same position on the object surface continuously in a movement period so as to obtain series of pictures, and subjecting the series of pictures to morphological dilation treatment, and then synthesizing a final target pictures. The device and the method provided by the invention solve the unable imaging problem due to too small mirror-like object surface defects and high reflections, and mirror-like object surface micro-defects and a background can form significant contrast, the noise is small, the gray value difference is great, and defect segmentation can be easy.
Description
Technical field
The present invention relates to machine vision light source and optical imaging field, relate in particular to a kind of class mirror article surface optical imaging device and formation method thereof.
Background technology
Machine vision, through the development of many decades, has been brought brand-new solution to industrial automation, is widely used in the quality testing in industrial manufacture process.Machine vision technique combines with industrial automation, has produced thus vision detection technology.And a step of vision-based detection most critical is selected correct optical imagery scheme exactly.Therefore light illumination and formation method become very important targetedly.
Occur manyly for the optical imagery scheme of the surface imperfection of class mirror article (as glass, plastics, metal works etc.), wherein suppressed reflective strong phenomenon from physics imaging aspect and account for mainly.Imaging scheme solves reflective strong problem, not only can make defect characteristic obvious, makes image comprise more information, and can reduce algorithm complexity, and stability is higher.
For class mirror article, due to the complicacy of technique, cause defect to be not only embodied in surface, be also present in enclosure, and there is high reflective surface traits.Therefore need a set of effective optical imagery scheme to guarantee that defect is identified, outstanding defect characteristic, just can carry out image processing.
Traditional vision detection system is processed individual object picture collecting, for class mirror article poor effect; Traditional light source package is also reflective due to class mirror article surface height, make defect be difficult to take out, and noise, the effect also can not get is introduced in the figure sector-meeting of taking out.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of class mirror article surface optical imaging device and formation method thereof are provided, effectively solve class mirror article surface defect too little and high reflective and cause cannot imaging problem, make the contrast of class mirror article surface tiny flaw and background obviously, noise is less, gray-scale value difference is larger, is easy to carry out defect Segmentation.
The present invention is achieved through the following technical solutions:
A kind of class mirror article surface optical imaging device, comprises parallel light source 1, grating 2, camera 4, computing machine 3 and for controlling the light source controller of parallel light source; Described camera 4 is connected with computing machine 3.
Described planar light light source 1 coordinates the non-homogeneous light source that produces light and shade striped with grating 2.
The formation method of above-mentioned class mirror article surface optical imaging device, realizes as follows;
According to the refraction of light and principle of reflection, utilize planar light light source 1 to coordinate the non-homogeneous light source that produces light and shade striped with grating 2, then make the whole scanned object of light and shade strip-scanning 5 surfaces by mobile non-homogeneous light source, and utilize camera 4 continuous acquisition scanned object 5 same positions in a moving period to obtain serial picture;
And this serial picture is carried out to morphological dilations processing, synthesize afterwards final Target Photo, in Target Photo, scanned object 5 surface imperfection are present in the background that intermediate gray-scale value formed with high gray-scale value, thereby present the defect characteristic on scanned object 5 surfaces;
Be specially: the light B of non-homogeneous light source is irradiated to the surperficial area free from defect of scanned object 5, and through superrefraction, reflection, final refracted ray B enters camera 4 and arrives lighted region; The light A of non-homogeneous light source is irradiated to scanned object 5 surface imperfection regions, and the light A direction finally reflecting is different from the light through area free from defect, is imaged on dark pixel region after entering camera 4.
For fear of analyzing one by one a series of stripeds of collecting image and homogeneous background at scanned object 5 surperficial diverse locations, described serial picture is synthesized to a pictures, make the gray-scale value at defectiveness place in final synthetic Target Photo large, the gray-scale value at zero defect place is bright fringes and the ratio that gathers spacing.
The present invention, with respect to prior art, has following advantage and effect:
The present invention is effective to class mirror article surface defect optical imagery, can solve its high reflective shortcoming, even trickle defect also can be given prominence to, and background is even, is convenient to defect Segmentation.
As mentioned above the present invention effectively solve class mirror article surface defect too little and high reflective and cause cannot imaging problem, make that class mirror article surface tiny flaw is obvious with background contrast, noise is less, gray-scale value difference is larger, is easy to carry out defect Segmentation.
Brief description of the drawings
Fig. 1 is class mirror article surface optical imaging device schematic diagram of the present invention.
Fig. 2 is grating 2 schematic diagram of the present invention.
Fig. 3 is formation method schematic diagram of the present invention.
Fig. 4 is this scanned object 5; Wherein, the rejected region of the sensing scanned object 5 of label 6, i.e. white point in dark fringe.
Embodiment
Below in conjunction with specific embodiment, the present invention is more specifically described in detail.
Embodiment
As Fig. 1--as shown in the of 4.The invention discloses a kind of class mirror article surface optical imaging device, it comprises parallel light source 1, grating 2, camera 4, computing machine 3 and for controlling the light source controller (not shown) of parallel light source; Described camera 4 is connected with computing machine 3.
Described planar light light source 1 coordinates the non-homogeneous light source that produces light and shade striped with grating 2.
The formation method of above-mentioned class mirror article surface optical imaging device is as follows:
According to the refraction of light and principle of reflection, utilize planar light light source 1 to coordinate the non-homogeneous light source that produces light and shade striped with grating 2, then make the whole scanned object of light and shade strip-scanning 5 surfaces by mobile non-homogeneous light source, and utilize camera 4 continuous acquisition scanned object 5 same positions in a moving period to obtain serial picture;
And this serial picture is carried out to morphological dilations processing, synthesize afterwards final Target Photo, in Target Photo, scanned object 5 surface imperfection are present in the background that intermediate gray-scale value formed with high gray-scale value, thereby present the defect characteristic on scanned object 5 surfaces;
Be specially: the light B of non-homogeneous light source is irradiated to the surperficial area free from defect of scanned object 5, and through superrefraction, reflection, final refracted ray B enters camera 4 and arrives lighted region; The light A of non-homogeneous light source is irradiated to scanned object 5 surface imperfection regions, and the light A direction finally reflecting is different from the light through area free from defect, is imaged on dark pixel region after entering camera 4.
For fear of the image stack counteracting of defective pixel value afterwards, this serial picture is all carried out to morphological dilations processing, can make like this dark pixel be corroded and disappear, only leave the defect characteristic of bright pixel.
For fear of analyzing one by one a series of stripeds of collecting image and homogeneous background at scanned object 5 surperficial diverse locations, described serial picture is synthesized to a pictures, make the gray-scale value at defectiveness place in final synthetic Target Photo large, the gray-scale value at zero defect place is bright fringes and the ratio that gathers spacing.The width of dark fringe is larger, has or not the gray-scale value difference of fault location larger, be more easy to cut apart, but can not be too large, so will be according to actual conditions choose reasonable.
The present invention adopts and guarantees scanned object 5 invariant positions, and the method for mobile non-homogeneous light source, so not only light and shade have a common boundary on continuous picture position of appearing continuously, and scanned object 5 is in the whole motion process of light source, the invariant position in the image collecting at camera 4.In order to reach, the defectiveness of scanned object 5 and zero defect part are contrasted strongly, zero defect background parts gray-scale value is even simultaneously, can select larger light-source brightness.
As mentioned above, just can realize preferably the present invention.
Embodiments of the present invention are not restricted to the described embodiments; other are any does not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitute, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (4)
1. a class mirror article surface optical imaging device, is characterized in that: comprise parallel light source, grating, camera, computing machine and for controlling the light source controller of parallel light source; Described camera is connected with computing machine.
2. class mirror article surface optical imaging device according to claim 1, is characterized in that: described planar light light source coordinates the non-homogeneous light source that produces light and shade striped with grating.
3. the formation method of class mirror article surface optical imaging device described in claim 1 or 2, is characterized in that following steps:
According to the refraction of light and principle of reflection, utilize planar light light source to coordinate the non-homogeneous light source that produces light and shade striped with grating, then make the whole scanned surface of light and shade strip-scanning by mobile non-homogeneous light source, and utilize camera continuous acquisition scanned object same position in a moving period to obtain serial picture;
And this serial picture is carried out to morphological dilations processing, synthesize afterwards final Target Photo, in Target Photo, scanned object surface imperfection is present in the background that intermediate gray-scale value formed with high gray-scale value, thereby presents the defect characteristic of scanned surface;
Be specially: the light B of non-homogeneous light source is irradiated to scanned surface area free from defect, and through superrefraction, reflection, final refracted ray B enters camera and arrives lighted region; The light A of non-homogeneous light source is irradiated to scanned object surface imperfection region, and the light A direction finally reflecting is different from the light through area free from defect, is imaged on dark pixel region after entering camera.
4. formation method according to claim 3, it is characterized in that: for fear of analyzing one by one a series of stripeds of collecting image and homogeneous background at scanned surface diverse location, described serial picture is synthesized to a pictures, make the gray-scale value at defectiveness place in final synthetic Target Photo large, the gray-scale value at zero defect place is bright fringes and the ratio that gathers spacing.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067639A (en) * | 2015-07-20 | 2015-11-18 | 丹阳市精通眼镜技术创新服务中心有限公司 | Device and method for automatically detecting lens defects through modulation by optical grating |
| CN109297971A (en) * | 2017-07-24 | 2019-02-01 | 住友化学株式会社 | Defect inspecting system and defect detecting method |
| CN109525840A (en) * | 2018-12-18 | 2019-03-26 | 凌云光技术集团有限责任公司 | The detection method of minor defect on a kind of imager chip |
| CN109557101A (en) * | 2018-12-29 | 2019-04-02 | 桂林电子科技大学 | A kind of defect detecting device and method of nonstandard high reflection curve surface work pieces |
| CN110243831A (en) * | 2019-06-06 | 2019-09-17 | 锐捷网络股份有限公司 | Surface defect acquisition system, detection method of surface flaw, device and storage medium |
| CN110261390A (en) * | 2019-06-13 | 2019-09-20 | 深圳市智能机器人研究院 | A kind of the surface defect Systems for optical inspection and method of diffusing reflection structure light |
| CN110261928A (en) * | 2019-05-07 | 2019-09-20 | 中国人民解放军国防科技大学 | Non-uniform light retroreflection detection method |
| CN110286134A (en) * | 2019-07-26 | 2019-09-27 | 上海御微半导体技术有限公司 | A kind of defect detecting device and its method |
| CN110849911A (en) * | 2019-11-25 | 2020-02-28 | 厦门大学 | Glass defect image acquisition device, glass defect detection equipment and detection method |
| CN110849912A (en) * | 2019-11-25 | 2020-02-28 | 厦门大学 | Glass defect developing device and glass defect detection equipment |
| CN110956619A (en) * | 2019-11-25 | 2020-04-03 | 厦门大学 | Curved glass defect detection method |
| CN113324996A (en) * | 2021-05-28 | 2021-08-31 | 东莞康视达自动化科技有限公司 | Flaw detection method suitable for object with surface having light reflection characteristic |
| CN114152623A (en) * | 2021-12-02 | 2022-03-08 | 河北工业大学 | Method and device for acquiring surface image of object with high light-reflecting surface |
| CN116106330A (en) * | 2023-04-17 | 2023-05-12 | 武汉名杰模塑有限公司 | Automobile bumper paint defect detection device and detection method thereof |
| CN117036357A (en) * | 2023-10-10 | 2023-11-10 | 无锡市方顺型钢科技有限公司 | Profile steel surface defect detection method based on visual characteristics |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5734742A (en) * | 1994-09-19 | 1998-03-31 | Nissan Motor Co., Ltd. | Inspection system and process |
| FR2820198A1 (en) * | 2001-01-26 | 2002-08-02 | Esic Sn | OPTICAL PROJECTION MEASURING DEVICE |
| CN1375053A (en) * | 1999-07-14 | 2002-10-16 | 索威森公司 | Method ans system for measuring the relief of an object |
| US20060050284A1 (en) * | 2000-11-22 | 2006-03-09 | Thomas Bertin-Mourot | Mewthod and device for analysing the surface of a substrate |
| CN1746619A (en) * | 2005-10-13 | 2006-03-15 | 华中科技大学 | Self-scanning projection measuring device for two-dimensional configuration outline |
| CN1871506A (en) * | 2003-10-21 | 2006-11-29 | 大发工业株式会社 | Method and device for inspecting surface to be inspected |
| CN1945204A (en) * | 2006-10-19 | 2007-04-11 | 上海大学 | Three dimension outline measuring device and method for mirror article surface |
| CN101711354A (en) * | 2007-03-28 | 2010-05-19 | Soi科技公司 | Method for detecting surface defects on a substrate and device using said method |
| CN102197275A (en) * | 2009-10-28 | 2011-09-21 | 株式会社尼利可 | Protrusion detection device and protrusion detection method |
| GB2481459A (en) * | 2010-06-25 | 2011-12-28 | Fraunhofer Ges Forschung | Capturing A Surface Structure Of An Object Surface |
-
2014
- 2014-06-06 CN CN201410250957.1A patent/CN104101611A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5734742A (en) * | 1994-09-19 | 1998-03-31 | Nissan Motor Co., Ltd. | Inspection system and process |
| CN1375053A (en) * | 1999-07-14 | 2002-10-16 | 索威森公司 | Method ans system for measuring the relief of an object |
| US20060050284A1 (en) * | 2000-11-22 | 2006-03-09 | Thomas Bertin-Mourot | Mewthod and device for analysing the surface of a substrate |
| FR2820198A1 (en) * | 2001-01-26 | 2002-08-02 | Esic Sn | OPTICAL PROJECTION MEASURING DEVICE |
| CN1871506A (en) * | 2003-10-21 | 2006-11-29 | 大发工业株式会社 | Method and device for inspecting surface to be inspected |
| CN1746619A (en) * | 2005-10-13 | 2006-03-15 | 华中科技大学 | Self-scanning projection measuring device for two-dimensional configuration outline |
| CN1945204A (en) * | 2006-10-19 | 2007-04-11 | 上海大学 | Three dimension outline measuring device and method for mirror article surface |
| CN101711354A (en) * | 2007-03-28 | 2010-05-19 | Soi科技公司 | Method for detecting surface defects on a substrate and device using said method |
| CN102197275A (en) * | 2009-10-28 | 2011-09-21 | 株式会社尼利可 | Protrusion detection device and protrusion detection method |
| GB2481459A (en) * | 2010-06-25 | 2011-12-28 | Fraunhofer Ges Forschung | Capturing A Surface Structure Of An Object Surface |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067639A (en) * | 2015-07-20 | 2015-11-18 | 丹阳市精通眼镜技术创新服务中心有限公司 | Device and method for automatically detecting lens defects through modulation by optical grating |
| CN105067639B (en) * | 2015-07-20 | 2018-03-27 | 丹阳市精通眼镜技术创新服务中心有限公司 | The eyeglass defect automatic detection device and method of a kind of Grating Modulation |
| CN109297971A (en) * | 2017-07-24 | 2019-02-01 | 住友化学株式会社 | Defect inspecting system and defect detecting method |
| CN109297971B (en) * | 2017-07-24 | 2022-10-21 | 住友化学株式会社 | Defect inspection system and defect inspection method |
| CN109525840A (en) * | 2018-12-18 | 2019-03-26 | 凌云光技术集团有限责任公司 | The detection method of minor defect on a kind of imager chip |
| CN109557101A (en) * | 2018-12-29 | 2019-04-02 | 桂林电子科技大学 | A kind of defect detecting device and method of nonstandard high reflection curve surface work pieces |
| CN109557101B (en) * | 2018-12-29 | 2023-11-17 | 桂林电子科技大学 | Defect detection device and method for non-elevation reflective curved surface workpiece |
| CN110261928B (en) * | 2019-05-07 | 2020-11-06 | 中国人民解放军国防科技大学 | Non-uniform light retroreflection detection method |
| CN110261928A (en) * | 2019-05-07 | 2019-09-20 | 中国人民解放军国防科技大学 | Non-uniform light retroreflection detection method |
| CN110243831A (en) * | 2019-06-06 | 2019-09-17 | 锐捷网络股份有限公司 | Surface defect acquisition system, detection method of surface flaw, device and storage medium |
| CN110243831B (en) * | 2019-06-06 | 2022-02-15 | 锐捷网络股份有限公司 | Surface defect acquisition system, surface defect detection method, surface defect detection device and storage medium |
| CN110261390A (en) * | 2019-06-13 | 2019-09-20 | 深圳市智能机器人研究院 | A kind of the surface defect Systems for optical inspection and method of diffusing reflection structure light |
| CN110286134A (en) * | 2019-07-26 | 2019-09-27 | 上海御微半导体技术有限公司 | A kind of defect detecting device and its method |
| CN110849911A (en) * | 2019-11-25 | 2020-02-28 | 厦门大学 | Glass defect image acquisition device, glass defect detection equipment and detection method |
| CN110849912A (en) * | 2019-11-25 | 2020-02-28 | 厦门大学 | Glass defect developing device and glass defect detection equipment |
| CN110956619A (en) * | 2019-11-25 | 2020-04-03 | 厦门大学 | Curved glass defect detection method |
| CN110849911B (en) * | 2019-11-25 | 2021-10-15 | 厦门大学 | Glass defect image acquisition device, glass defect detection equipment and detection method |
| CN110956619B (en) * | 2019-11-25 | 2022-07-01 | 厦门大学 | Curved glass defect detection method |
| CN113324996A (en) * | 2021-05-28 | 2021-08-31 | 东莞康视达自动化科技有限公司 | Flaw detection method suitable for object with surface having light reflection characteristic |
| CN113324996B (en) * | 2021-05-28 | 2023-01-17 | 东莞康视达自动化科技有限公司 | Flaw detection method suitable for object with light-reflecting characteristic on surface |
| CN114152623A (en) * | 2021-12-02 | 2022-03-08 | 河北工业大学 | Method and device for acquiring surface image of object with high light-reflecting surface |
| CN114152623B (en) * | 2021-12-02 | 2023-08-15 | 河北工业大学 | Method and device for acquiring surface image of object with high light reflection surface |
| CN116106330A (en) * | 2023-04-17 | 2023-05-12 | 武汉名杰模塑有限公司 | Automobile bumper paint defect detection device and detection method thereof |
| CN117036357A (en) * | 2023-10-10 | 2023-11-10 | 无锡市方顺型钢科技有限公司 | Profile steel surface defect detection method based on visual characteristics |
| CN117036357B (en) * | 2023-10-10 | 2023-12-22 | 无锡市方顺型钢科技有限公司 | Profile steel surface defect detection method based on visual characteristics |
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Application publication date: 20141015 |