CN102855684A - Optical detection method and device - Google Patents
Optical detection method and device Download PDFInfo
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- CN102855684A CN102855684A CN2012103528814A CN201210352881A CN102855684A CN 102855684 A CN102855684 A CN 102855684A CN 2012103528814 A CN2012103528814 A CN 2012103528814A CN 201210352881 A CN201210352881 A CN 201210352881A CN 102855684 A CN102855684 A CN 102855684A
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Abstract
The invention relates to an optical detection method. The method is used for detecting the truth of color-changing ink of paper money or a holographic image. The optical detection method comprises the following steps: an image to be detected is arranged in an effective range capable of being irradiated by a light source; the light source and a camera begin to work; the light source irradiates the image to be detected; the ray of a part of the image to be detected, irradiated by a light beam inclining on the image to be detected, enters an oblique camera after being reflected by at least one reflector; the ray vertical to the image to be detected enters a vertical camera to shoot, and enters to be parallel to the ray of the oblique camera and the vertical camera, and the shot picture is analyzed. An illuminating system comprises a light source, and at least one reflector arranged on a light path from the light source to the oblique camera or the light path on which the vertical camera is; an imaging system comprises at least one vertical camera and the oblique camera, and is arranged at one side of the illuminating system. The optical detection method is simple and flexible in using method, high in identification accuracy comparison and low in cost.
Description
Technical field
The present invention relates to a kind of optical detecting method and device.
Background technology
At present, by the understanding to the orientative feature of the new edition rmb paper currency announced, the photochromatic printing ink anti-counterfeiting technology has under the visible light condition observes the characteristics that present respectively green and blue (or blackish green) in different angles, this anti-counterfeiting technology does not also have manufactured counterfeit money person to copy at present, mainly is that the related optical ink material behavior of this technology gives prominence to, is difficult to copy.The optical ink anti-counterfeiting technology is that rmb paper currency false proof erected indestructible defence line one.
By the specificity analysis to the rmb paper currency optical ink, under the visible light condition, present respectively two kinds of colors by the luminous collection photochromatic printing ink of different angles, counterfeit money then only presents a kind of color, and the difference of the color of photochromatic printing ink that therefore can be by obtaining different angles realizes the discriminating to this type of counterfeit money.In the prior art, usually adopt oblique shooting camera to take the light that reflection favours bank note, adopt vertical shooting camera to take reflection perpendicular to the light of bank note, but, because the light that favours bank note is many, and relatively disperses, when a plurality of cameras being set taking pictures, quantity and position be bad control all, and the precision of taking is impacted.
In addition, on all multi-products or trade mark, for the false proof hologram image that usually can adopt as false proof icon or trade mark, also can adopt above-mentioned detection method, but have equally the problems referred to above.
Summary of the invention
The purpose of this invention is to provide a kind of optical detecting method.
For achieving the above object, the technical solution used in the present invention is:
A kind of optical detecting method, the method is characterized in that for detection of the true and false of bank note color shifting ink or hologram image: may further comprise the steps:
Step 1: image to be detected is placed within the effective range that light source can shine, light source, at least one vertical shooting camera and tiltedly shooting camera start working;
Step 2: light source sends light beam irradiates image to be detected, the reflection ray of light beam irradiates image to be detected comprises the light that favours image to be detected, perpendicular to the light of image to be detected, the light that part favours image to be detected is incident to oblique shooting camera and takes after at least one mirror reflects; Be incident to vertical shooting camera perpendicular to the light of image to be detected and take, and the light that is incident to oblique shooting camera, vertical camera parallels;
Step 3: the picture that oblique shooting camera is taken is analyzed with the picture that vertical shooting camera is taken: if the variable color of picture curing ink or image are normal, then be genuine piece, otherwise then be false product.
Preferably, in the step 1: described light source is provided with at least one, and described light source is one or more in red, green, blue, infrared.
Preferably, in the step 2: the light that part favours image to be detected is incident to oblique shooting camera shooting after the first catoptron, the second mirror reflects.
Preferably, in the step 2: the light perpendicular to image to be detected is taken by vertical shooting camera after the 3rd mirror reflects.
Another object of the present invention provides a kind of device of realizing optical detecting method.
For achieving the above object, the technical solution used in the present invention is:
A kind of device of realizing optical detecting method, comprise illuminator, imaging system, described illuminator comprises light source, the described imaging decorum comprises at least one vertical shooting camera, oblique shooting camera, described illuminator also comprises at least one catoptron, described catoptron is arranged on light source to the light path at oblique shooting camera or vertical shooting camera place, and described imaging system is arranged on a side of described illuminator.
Preferably, described light source is provided with the first catoptron, the second catoptron to the light path at oblique shooting camera place.
Preferably, described light source is provided with the 3rd catoptron to the light path at vertical shooting camera place.
Preferably, described oblique shooting camera, vertical shooting camera comprise line array sensor, are arranged on the lens of described line array sensor front portion.
Preferably, described light source is provided with at least one, and described light source is one or more in red, green, blue, infrared.
Because technique scheme is used, the present invention compared with prior art has following advantages:
The present invention is by arranging catoptron, so that illuminator, imaging system are separated mutually, that can separate arranges both, thereby finishes better shooting contrast, and using method is simple, flexibly, differentiates that ratio of precision is higher, and with low cost.
Description of drawings
Accompanying drawing 1 is structural representation of the present invention.
Wherein: 1, bank note; 2, light source; 3, light source; 4, the second catoptron; 5, the 3rd catoptron; 6, the first catoptron; 7, lens; 8, lens; 9, line array sensor; 10, line array sensor.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
Embodiment one:
A kind of optical detecting method, the method detects the color shifting ink of bank note, may further comprise the steps:
Step 1: bank note is placed within the effective range that light source can shine, light source, at least one vertical shooting camera and tiltedly shooting camera start working, light source is provided with at least one, can be in red, green, blue, infrared one or more;
Step 2: light source sends light beam irradiates bank note, and the reflection ray of light beam irradiates bank note comprises the light that favours bank note, perpendicular to the light of bank note, and the light that part favours bank note is incident to oblique shooting camera and takes after at least one mirror reflects; Light perpendicular to bank note is incident to vertical shooting camera shooting, and the light that is incident to oblique shooting camera, vertical camera parallels, the light that favours bank note such as part is incident to oblique shooting camera after two mirror reflects, the vertical shooting camera of light quilt after a mirror reflects perpendicular to bank note parallels with two light that reach incident;
Step 3: the picture that oblique shooting camera is taken compares with the picture that vertical shooting camera is taken: if the variable color of picture curing ink is normal, bank note is genuine note, otherwise then is counterfeit money.
Below concrete set forth a kind of device of realizing above-mentioned detection method:
As shown in Figure 1: it comprises illuminator, imaging system, and illuminator comprises light source 2, light source 3, and light source 2,3 is one or both in red, green, blue, infrared; The imaging decorum comprises at least one vertical shooting camera, oblique shooting camera, and in the present embodiment: vertical shooting camera comprises line array sensor 9, is arranged on the lens 7 of line array sensor 9 front portions; Equally, tiltedly shooting camera also comprises line array sensor 10, is arranged on the lens 8 of line array sensor 10 front portions.
Illuminator also comprises at least one catoptron, and specifically: light source 2,3 is provided with the first catoptron 6, the second catoptron 4 to the light path at oblique shooting camera place; Light source 2,3 is provided with the 3rd catoptron 5 to the light path at vertical shooting camera place.
Imaging system comprises vertical shooting camera, tiltedly shooting camera is arranged on the side that illuminator comprises light source 2,3, the first catoptron 6, the second catoptron 4, the 3rd catoptron 5, can increase and decrease the camera quantity in the imaging system as required, camera position is adjusted, to satisfy the needs of taking.
Embodiment two:
The present embodiment and embodiment one are basic identical, difference is that the method detects hologram image, with imaging system in different azimuth and cooperate the adjustment of the reflecting surface of the catoptron in the illuminator, hologram image to be detected is carried out multi-faceted shooting, again the picture of taking is analyzed, judged whether the image in each orientation is normal.
The device part is identical with embodiment one, and its structure is no longer given unnecessary details at this.
Above-described embodiment only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with technique can understand content of the present invention and according to this enforcement, can not limit protection scope of the present invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (9)
1. optical detecting method, the method is characterized in that for detection of the true and false of bank note color shifting ink or hologram image: may further comprise the steps:
Step 1: image to be detected is placed within the effective range that light source can shine, light source, at least one vertical shooting camera and tiltedly shooting camera start working;
Step 2: light source sends light beam irradiates image to be detected, the reflection ray of light beam irradiates image to be detected comprises the light that favours image to be detected, perpendicular to the light of image to be detected, the light that part favours image to be detected is incident to oblique shooting camera and takes after at least one mirror reflects; Be incident to vertical shooting camera perpendicular to the light of image to be detected and take, and the light that is incident to oblique shooting camera, vertical camera parallels;
Step 3: the picture that oblique shooting camera is taken is analyzed with the picture that vertical shooting camera is taken: if the variable color of picture curing ink or image are normal, then be genuine piece, otherwise then be false product.
2. a kind of optical detecting method according to claim 1, it is characterized in that: in the step 1: described light source is provided with at least one, and described light source is one or more in red, green, blue, infrared.
3. a kind of optical detecting method according to claim 1 is characterized in that: in the step 2: the light that part favours image to be detected is incident to oblique shooting camera and takes after the first catoptron, the second mirror reflects.
4. a kind of optical detecting method according to claim 1 is characterized in that: in the step 2: perpendicular to the vertical shooting camera shooting of light quilt after the 3rd mirror reflects of image to be detected.
5. device of realizing the described optical detecting method of above-mentioned any one claim, comprise illuminator, imaging system, described illuminator comprises light source, the described imaging decorum comprises at least one vertical shooting camera, oblique shooting camera, it is characterized in that: described illuminator also comprises at least one catoptron, described catoptron is arranged on light source to the light path at oblique shooting camera or vertical shooting camera place, and described imaging system is arranged on a side of described illuminator.
6. device according to claim 5 is characterized in that: be provided with the first catoptron, the second catoptron on the light path at the extremely oblique shooting camera place of described light source.
7. device according to claim 5 is characterized in that: be provided with the 3rd catoptron on the light path at the extremely vertical shooting camera place of described light source.
8. device according to claim 5 is characterized in that: described oblique shooting camera, vertical shooting camera comprise line array sensor, are arranged on the lens of described line array sensor front portion.
9. device according to claim 5, it is characterized in that: described light source is provided with at least one, and described light source is one or more in red, green, blue, infrared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103528814A CN102855684A (en) | 2012-09-21 | 2012-09-21 | Optical detection method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103528814A CN102855684A (en) | 2012-09-21 | 2012-09-21 | Optical detection method and device |
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Cited By (3)
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| CN104331976A (en) * | 2014-10-31 | 2015-02-04 | 苏州保瑟佳货币检测科技有限公司 | Detecting method and device of negotiable securities |
| CN106442327A (en) * | 2016-12-08 | 2017-02-22 | 苏州德创测控科技有限公司 | Optical system for detecting side image information of object |
| CN106644989A (en) * | 2017-01-26 | 2017-05-10 | 夏明亮 | Detecting system of absorbance |
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| CN106644989B (en) * | 2017-01-26 | 2023-08-01 | 夏明亮 | Absorbance detection system |
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Application publication date: 20130102 |