CN107346579A - Optical security features detection method and device - Google Patents
Optical security features detection method and device Download PDFInfo
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- CN107346579A CN107346579A CN201610291269.9A CN201610291269A CN107346579A CN 107346579 A CN107346579 A CN 107346579A CN 201610291269 A CN201610291269 A CN 201610291269A CN 107346579 A CN107346579 A CN 107346579A
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
- G07D7/121—Apparatus characterised by sensor details
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/20—Testing patterns thereon
- G07D7/2016—Testing patterns thereon using feature extraction, e.g. segmentation, edge detection or Hough-transformation
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Abstract
The invention discloses a kind of optical security features detection method, including：Respectively from two different angle irradiation security pattern regions；The reflected light of the security pattern region is received at a predetermined angle, obtains image resulting during two different angular illuminations；More described two different images, to determine whether the security pattern is the pattern with optical security features.Imaging sensor provided by the invention, optical security features detection method and device detection discrimination are high, stable and reliable for performance.
Description
Technical field
The present invention relates to field of photoelectric technology, and in particular to contact-type image sensor (CIS, Contact
Image Sensor), optical security features detection method and device.
Background technology
Optical security features refer to when light irradiates from different perspectives, or observe observing object from different perspectives
When, observing object shows different characteristics of image.Using the printing product institute of optical security features fabrication techniques
The effect for the dynamic change that the image seen has, can not use high-definition scanning instrument, color copy machine and its
He is replicated equipment, and its design and producing technology is great professional in addition, complex manufacturing technology, and investment is huge
Greatly, it is difficult to it is imitated, therefore be widely used in certificate, important bill, trade mark it is high-end false proof.
The presently used Technical comparing with optical security features is more, wherein more common has hologram
Picture, hidden pattern etc..
Hologram image is to produce prismy diffraction by making video to plastic sheeting by laser plate-making
Effect, make picture that there is two dimension, three dimensions sense.Under ordinary ray, image, the letter hidden in picture
Breath can reappear, and when light irradiates from a certain special angle, new image occurs again on picture.At present
Multinational certificate, bill, trade mark etc. are all false proof using the progress of hologram image technology.
Hidden pattern is mainly based upon gravure techniques, different according to the direction of gravure ink strain line, pattern refractive power
Effect is also different.When oblique view, the power that reflection light is produced because Mo Wen directions are different is different, it is seen that
Image can observe hiding image information.And when right-angle view, reflected light is strong and weak with black line arrangement side
To unrelated, the hide information in image can be hidden.
Existing device all using based on cmos device (CMOS,
Complementary Metal-Oxide Semiconductor) or charge coupled cell (CCD, Charge
Coupled Device) camera is to optical security features (such as hologram image) region of certificate, bill
Taken pictures, obtain the image of relevant range, the true of the false proof point is differentiated using image processing algorithm afterwards
It is pseudo-.These devices have following main feature：
First, a set of image collecting device is installed in the position being likely to occur in each optical security features region.
Set of device according to the position in taken optical security features region, will design the position of light source and camera
Put so that camera can obtain the direct picture of certificate, bill simultaneously (from substantially vertical angle shot
Image) and side image (image shot from side with certain angle of inclination).
Second, due to the certificate of country variant, bill, different currency types, optical security features region is in paper money
It is different the location of on ticket, so a set of equipment often may be only available for a certain state's certificate, bill
The optical security features region detection of one or more of currency types.
3rd, due to using CMOS or CCD camera focal length all bigger, to shoot certain limit
The visual field, be required for certain shooting distance, therefore the volume needed for whole filming apparatus is often all bigger.
By it is above-mentioned the characteristics of also determine and to be set using CMOS or CCD camera detection optical security features
It is standby to have the problem of following：
When CMOS or CCD camera are in shooting, certificate, bill are walking the motion of paper money intracavitary and theoretical fortune
Emotionally condition often has certain difference, and this also determines that optical anti-counterfeiting is special when camera carries out image taking
There is certain discrepancy in the location of sign region with theoretical position, so as to also cause in imaging, direct picture,
Side image, optical security features region and light source relative position and be designed with certain deviation.This is also final
Have influence on the recognition effect of color shifting ink.
Different currency types is additionally, since, the position of banknote is different where optical security features region, and
CMOS or CCD devices have to be installed on optical security features regional location, so for light
Certificate, bill of the anti-counterfeiting characteristic region not on same position are learned, can only be carried out by more different equipment
Identification.And when issue a fresh edition certificate, bill when, if the position in optical security features region becomes
Change, then must carry out hardware re-design renewal to original equipment.
In addition, volume needed for CMOS or CCD camera is larger, and it is extremely compact for indoor design
Point, test, for sorting equipment, undoubtedly substantially increase the design requirement of equipment, also increase and entirely set
Standby overall volume.
The content of the invention
In view of this, the present invention provides CIS, optical security features detection method and device, also provides use
The inspection equipment of optical security features detection means of the present invention, while gather front and the side view of detected material
Picture, and by comparing acquired image, the purpose of detection optical security features is reached with this.
A kind of optical security features detection method provided by the invention, this method include：
Respectively from two different angle irradiation security pattern regions；
The reflected light of the security pattern region is received at a predetermined angle, obtains two different angles
Resulting image during irradiation；
More described two different images, to determine whether the security pattern is with optical security features
Pattern.
The predetermined angular and described two different irradiating angles are unequal.
The difference of described two different irradiating angles is more than or equal to 30 degree.
A kind of contact-type image sensor CIS provided by the invention, the CIS include：Lens, photoelectricity turn
Change chip and the first light source and secondary light source alternately lighted；
First light source is with the presumptive area on the first incident angle α 1 irradiation detected material；
With the presumptive area on the second incident angle α 2 irradiation detected material, described first enters the secondary light source
The incident angle αs 2 of firing angle α 1 and second are unequal；
The lens, the reflected light of the presumptive area is received with view angle β and imports the photoelectricity turn
Change chip；
The photoelectric conversion chip, the reflected light imported through the lens is received, obtains first light source
The second of presumptive area when the first image of the presumptive area and the secondary light source are lighted when lighting
Image.
The present invention also provides a kind of optical security features detection means, including recognition unit and provided by the invention
CIS。
The CIS, the first obtained image and the second image are exported to recognition unit；
The recognition unit, described first image and second image are handled, and more described
One image and second image, to judge whether presumptive area has optical security features on detected material.
The present invention also provides a kind of optical security features detection means examined equipment, include the present invention, and
Instruction device；
The optical security features detection means is used for the feature for detecting presumptive area on detected material, and will
Testing result is sent to the instruction device；
Instruction device, the testing result provided according to the optical security features detection means export tested quilt
Whether detectable substance is genuine indication signal.
More appropriately, the inspection equipment, in addition to：
Alarm device, the testing result provided for receiving the optical security features detection means, and according to
The testing result outputting alarm audio signal.
CIS provided by the invention, optical security features detection method and device in, gather detected material,
Such as certificate, the front of bill or other printed articles and side image, incidence angle and fate due to light
Domain reflection-based view angle is fixed, therefore the image light gathered is more uniformly distributed, compared to conventional CMOS
Or CCD camera detects the method and device of optical security features, optical anti-counterfeiting provided by the invention is special
The detection method and device of sign are walked paper money intracavitary and walk paper money situation to be influenceed smaller by certificate, bill in machinery, are obtained anti-
The effect of pseudo- optical signature it is also ensured that.Secondly, for different currency types, optical security features are (as entirely
Cease pattern, hidden pattern etc.) even in banknote position it is different, can also be completed by a set of equipment
The detection of different currency type certificates, bill.When issuing new edition certificate, bill, it is only necessary to pass through software upgrading
Can completes device upgrade.For CMOS or CCD camera, CIS small volumes, installation
It is very convenient, it can make it that structure is more compact when carrying out mechanical part design, equipment assembling is also more square
Just.For an equipment, as long as respectively installing a CIS on the two sides of passage, it is possible to complete to demonstrate,prove one
Part, the optical security features in bill front and back full width face are detected.Optical anti-counterfeiting provided by the invention
Characteristic detection method and device detection discrimination are high, stable and reliable for performance.
Figure of description
Fig. 1 is the structure of the detecting device schematic diagram provided in the prior art；
Fig. 2 is the first optical security features detection method flow chart in the embodiment of the present invention one；
Fig. 3 is second of optical security features detection method flow chart in the embodiment of the present invention one；
Fig. 4 is the optical security features detection means configuration diagram provided in the embodiment of the present invention two；
Fig. 5 is another optical security features detection means framework signal provided in the embodiment of the present invention three
Figure；
Fig. 6 is another the optical security features detection means framework signal provided in the embodiment of the present invention four
Figure；
Fig. 7 is the inspection equipment configuration diagram provided in the embodiment of the present invention five.
Embodiment
The detection of optical signature is carried out, it is special to show different optics for the region on the image for making to photograph
Levy it is necessary to carry out the irradiation of different angle to detected material as much as possible, and carry out different angle as much as possible
Shooting.The present invention proposes the image using presumptive area different angle on CIS collection detected materials,
To reach the purpose of detection optical security features.
Under normal circumstances, CIS is served only for the image of collection perspective or head-on reflection.The present invention provides a kind of light
The detection method and device of anti-counterfeiting characteristic are learned, detected material, such as certificate, ticket are gathered simultaneously using CIS
According to or other printed articles on presumptive area front and side image, extract to the false proof spy of the imagery optical
Sign, to identify whether the image of presumptive area on detected material has optical security features.
Fig. 1 show existing structure of the detecting device schematic diagram.From figure 1 it appears that the detection means
Realized by CIS, the CIS includes：Visible light source 102, lens 103 and photoelectric conversion chip 104.
Specifically, the presumptive area of detected material 101, presumptive area are irradiated when light source 102 is lighted with incident angle α
Reflected light to enter lens 103 perpendicular to the direction of the plane of detected material 101, and turn eventually through photoelectricity
Chip 104 is changed to be imaged.This catoptric imaging can as be to detected material irradiation, shooting and obtain
Image.
The detection of optical security features is carried out, optical security features are showed on the image for making to photograph, just
Side irradiation is carried out to detected material as far as possible, and carry out side shooting.Technical side provided by the invention
The collection of side image is carried out in case using CIS, to reach the detection light such as hologram image and hidden pattern
Learn the purpose of anti-counterfeiting characteristic.
To make the principle of the present invention, characteristic and advantage clearer, with reference to specific embodiment to the present invention
It is described in detail.
Embodiment one
The detection method of two kinds of optical security features is provided in the embodiment of the present invention, can be to certificate, bill, ticket
According to or other printed articles on optical security features carry out detection and identification.
Reference picture 2, the first optical security features detection method that the embodiment of the present invention one provides, including under
State step：
S201, the fate alternately irradiated with the first incident angle α 1 and the second incident angle α 2 on detected material
Domain；The incident angle α 2 of first incident angle α 1 and second is unequal.
S202, the reflected light of the presumptive area is received with view angle β, obtains shining with the first incident angle α 1
The first image of the presumptive area and irradiated when penetrating the presumptive area with the second incident angle α 2 described pre-
Determine the second image of presumptive area during region.
Above-mentioned first incident angle α 1, the second incident angle α 2 and view angle β are and perpendicular to detected materials
Direction angle.
During in order to avoid irradiation presumptive area, there is strong reflective appearance corresponding position, so as to lead to not just
Often imaging, view angle β and the first incident angle α 1 and the second incident angle α 2 are unequal.
In order that different optical security features can be presented in presumptive area on detected material, first can be made
Incident angle α 1 is less than or equal to 30 degree, and the second incident angle α 2 is more than or equal to 60 degree.Second can also be made to enter
The difference of the incident angle αs 1 of firing angle α 2 and first is more than or equal to certain numerical value, and specifically, the difference can be with
For 10 degree, 30 degree or 50 degree etc..
S203, compare described first image and the second image, to judge it is anti-whether the presumptive area has
Pseudo- optical signature.
Optical security features include change in pattern feature, the change in pattern feature of hidden pattern of hologram image.
Reference picture 3, second of optical security features detection method that the embodiment of the present invention one provides, including under
State step：
S301, the presumptive area irradiated on detected material.
S302, the reflection of the presumptive area is received with the first view angle β 1 and the second view angle β 2 respectively
Light and the first image and the second image for obtaining the presumptive area；The first view angle β 1 and described
Second view angle β 2 is unequal.
It is predetermined with the irradiation of the first incident angle α 1 when receiving the reflected light of presumptive area with the first view angle β 1
Region, when receiving the reflected light of presumptive area with the second view angle β 2, irradiated with the second incident angle α 2 pre-
Determine region.
Above-mentioned first view angle β 1, the second view angle β 2, the first incident angle α 1 and the second incident angle α 2
It is and the angle perpendicular to the direction of detected material.
During in order to avoid irradiation presumptive area, there is strong reflective appearance corresponding position, so as to lead to not just
Often imaging, the first view angle β 1 and the first incident angle α 1 are unequal, and the second view angle β 2 enters with second
Firing angle α 2 is unequal.
In order that different optical security features can be presented in presumptive area on detected material, first can be made
View angle β 1 is less than or equal to 30 degree, and the second view angle β 2 is more than or equal to 60 degree.The second sight can also be made
The view angle β 1 of angle measurement β 2 and first difference is more than or equal to certain numerical value, and specifically, the difference can be with
For 10 degree, 30 degree or 50 degree etc..
S303, compare described first image and second image, detect whether the presumptive area has
False proof optical signature.
Optical security features include change in pattern feature, the change in pattern feature of hidden pattern of hologram image.
Embodiment two
Fig. 4 is the optical security features structure of the detecting device schematic diagram provided in the embodiment of the present invention two.
As shown in figure 4, the optical security features detection means includes CIS and recognition unit (in Fig. 4
It is not shown), wherein CIS includes light source 302a, 302b, lens 303 and the opto-electronic conversion alternately lighted
Chip 304.
Light source 302a and light source 302b is arranged on the both sides of lens 303.
Light source 302a, with the presumptive area on the first incident angle α 1 irradiation detected material 301 when lighting.
Light source 302b, with the presumptive area on the second incident angle α 2 irradiation detected material 301 when lighting.
In the present embodiment two, the first incident angle α 1 and the second incident angle α 2 are unequal.
In order that different optical security features can be presented in the presumptive area on detected material 301, can make
First incident angle α 1 is less than or equal to 30 degree, and the second incident angle α 2 is more than or equal to 60 degree.Can also be made
The difference of two incident angle αs 2 and the first incident angle α 1 is more than or equal to some numerical value, and specifically, the numerical value can
Think 10 degree, 30 degree or 50 degree etc..
Lens 303, the reflected light of the presumptive area is received with view angle β and imports the opto-electronic conversion
Chip 304.
In the present embodiment two, the reflected light of presumptive area is with perpendicular to the direction of the plane of detected material 301
Entrance lens 303, so above-mentioned view angle β is equal to 0 degree, it is not shown in Fig. 4.
During in order to avoid light source 302a and light source 302b irradiation presumptive areas, there is reflective by force penetrate corresponding position
Enter photoelectric conversion chip 304, so as to lead to not normal imaging, view angle β and the first incident angle α 1 and
Second incident angle α 2 is unequal.
Photoelectric conversion chip 304, the reflected light imported through lens 303 is received, obtains the light source 302a
Second image of presumptive area when the first image of presumptive area and light source 302b are lighted when lighting.
The unit that control light source 302a and light source 302b is alternately lighted can also be included in CIS shown in Fig. 4
(not shown in Fig. 4), such as, first, light source 302a is opened, and light source 302b is closed, opto-electronic conversion
Chip 304 gathers a line view data；Afterwards, light source 302b is lighted, and light source 302a is closed, photoelectricity
Conversion chip 304 gathers a line view data again；Then light source 302a, 302b are so alternately turned on,
Light source 302b, 302a are closed, by that analogy.As can be seen here, when detected material 301 passes through photoelectricity completely
During conversion chip 304, photoelectric conversion chip 304 can obtain a coloured image, the odd number of the image
Row irradiates to obtain by light source 302a, and even number line irradiates to obtain by light source 302b.Specifically, can adopt
It is complete that the odd-numbered line for the image for being obtained photoelectric conversion chip 304 with software image processing method synthesizes a view picture
Obtained image is irradiated by light source 302a entirely, even number line is synthesized into a width irradiates what is obtained by light source 302b entirely
Image.Because the light source 302a images for irradiating to obtain are obtained by front illuminated, front shooting, so can
To be considered that obtained image is observed in certificate, bill or printed matter front, and obtained by light source 302b irradiations
Image, although and front shooting, light source 302b incidence angle is larger, can equally to be detected
Survey on thing and different optical security features are presented, such as make the image of acquisition that different optical anti-counterfeiting spies be presented
Sign, specifically, on image shows different pattern (for hologram image and hidden pattern), is equal to
The image that side observation detected material 301 obtains.Afterwards, by recognition unit (not shown in Fig. 4),
Follow-up image procossing, and relatively more resulting front elevation are carried out to resulting direct picture and side image
Picture and side image, to judge whether the region has optical security features, optical security features include complete
Cease the change in pattern feature of image and the change in pattern feature of hidden pattern.Such as judge whether pattern is hologram
Whether picture, pattern are hidden pattern.According to optical security features in two images come judge certificate, bill or
The true and false of printed matter.
Embodiment three
Fig. 5 is another optical security features structure of the detecting device signal provided in the embodiment of the present invention three
Figure.
CIS and the difference of optical security features detection means in embodiment two shown in Fig. 5 be, this reality
In the optical security features detection means for applying the offer of example three, two light sources 402a and 402b in CIS are set
In the same side of lens 403, lens 403 receive the reflected light of presumptive area with view angle β and import light
Electric conversion chip 404, view angle β here are more than 0 degree, i.e. lens 403 and photoelectric conversion chip 404
The plane for favouring detected material 401 is set.
Two light sources 402a and 402b are arranged on the homonymy of lens 403, so lens 403 can be allowed to have one
Fixed angle of inclination, so that the light of the light source 402b reflections of side irradiation can be more fully injected into
Photoelectric conversion chip 404.But because lens 403 and photoelectric conversion chip 404 will tilt installation, institute
To require higher to manufacturing process.
This optical security features detection means workflow in the present embodiment and the optics in embodiment two
Anti-counterfeiting characteristic detection means is essentially identical, and two light sources 402a and 402b will be lighted alternately, can obtain phase
The image answered, the odd-numbered line in the image synthesize the first figure that a width is irradiated to obtain completely by light source 402a
Picture, even number line synthesize the second image that a width is irradiated to obtain completely by light source 402b.
Afterwards, by recognition unit (not shown in Fig. 5), to resulting direct picture and side image
Carry out follow-up image procossing, and the optical security features of relatively more resulting direct picture and side image
(pattern of such as hologram image or the image of hidden pattern), to judge whether the region has optical anti-counterfeiting
Feature, optical security features include the pattern of hologram image and the variation characteristic of hidden pattern.Such as judge pattern
Whether it is hologram image, whether pattern is hidden pattern.Judged according to optical security features in two images
The true and false of certificate, bill or printed matter.
Example IV
Fig. 6 is another the optical security features structure of the detecting device signal provided in the embodiment of the present invention four
Figure.Reference picture 6, the optical security features detection means provided in the present embodiment, including CIS and identification are single
First (not shown in Fig. 6), wherein CIS include 502, two groups of lens 503a and 503b of a light source and
Two groups of photoelectric conversion chips 504a and 504b.
Light source 502, the presumptive area irradiated when lighting on detected material 501.
Lens 503a, the reflected light of presumptive area is received with the first view angle β 1 and imports opto-electronic conversion core
Piece 504a.
Lens 503b, the reflected light of presumptive area is received with the second view angle β 2 and imports opto-electronic conversion core
Piece 504b.
Above-mentioned first view angle β 1 and the second view angle β 2 are unequal, and lens 503a is with the first view angle
When β 1 receives the reflected light of presumptive area, light source 502 irradiates presumptive area with the first incident angle α 1, thoroughly
When mirror 503b receives the reflected light of presumptive area with the second view angle β 2, light source 502 is with the second incidence angle
α 2 irradiates presumptive area.
As can be seen that in the present embodiment four, lens 503a and photoelectric conversion chip 504a face tested
Survey thing 501 to set, lens 503b and photoelectric conversion chip 504b incline with detected material 501 into certain
Rake angle is set.
In the present embodiment four, 0 degree is equal on the borders of the first view angle β 1, so not showed that in Fig. 6.
In order that different optical security features, the first view angle can be presented in the presumptive area on detected material 501
β 1 it is also an option that be less than or equal to 30 degree of other values in addition to 0 degree, the second view angle β 2 more than etc.
In 60 degree.The second view angle β 2 and the first view angle β 1 difference can also be made to be more than or equal to a certain numerical value,
Specifically, the numerical value can be 10 degree, 30 degree or 50 degree etc..
When irradiating presumptive area in order to avoid light source 502, there is strong reflective injection opto-electronic conversion core corresponding position
Piece 504a or 504b, so as to lead to not normal imaging, the first view angle β 1 and the first incident angle α 1
Unequal, the second view angle β 2 and the second incident angle α 2 are unequal.
Photoelectric conversion chip 504a, the reflected light imported through lens 503a is received, obtains the presumptive area
The first image, i.e. direct picture.
Photoelectric conversion chip 504b, the reflected light imported through lens 503b is received, obtains the presumptive area
The second image, i.e. side image.
In the optical security features detection means provided in the present embodiment, due to there was only one group of light source, therefore with
Foregoing two kinds of devices are compared, and the light source of switching diverse location is not had in gatherer process.And two groups of photoelectricity turn
Chip 504a and 504b are changed, a width complete image can be obtained respectively, obtained from photoelectric conversion chip 504a
To front illuminated, the direct picture of front shooting, side irradiation, side are obtained from photoelectric conversion chip 504b
The side image of face shooting.This two images utilizes the image processing algorithm of rear end, it is possible to carries out optics and prevents
The detection of pseudo-characteristic.Because the situation of multiplexing is all not present in two groups of photoelectric conversion chips, therefore angle can be set
Count relatively reasonable, photoelectric conversion chip 504a and 504b is photosensitive also more abundant.
Afterwards, by recognition unit (not shown in Fig. 6), to resulting direct picture and side image
Carry out follow-up image procossing, and the optical security features of relatively more resulting direct picture and side image
(pattern or hidden pattern of such as hologram image), to judge whether the region has optical security features,
Optical security features include the change color characteristic of color shifting ink, the change in pattern feature and hidden pattern of hologram image
Change in pattern feature.Such as judge whether pattern is hologram image, and whether pattern is hidden pattern.According to two
Optical security features judge certificate, bill or the true and false of printed matter on width image.
Embodiment five
The embodiment of the present invention also provides a kind of inspection equipment, is examined using the optical security features in previous embodiment
Device is surveyed, can be to being detected using optical security features such as hologram image, hidden patterns as anti-counterfeit measures
Thing, such as certificate, bill, bill or other printed articles are detected, and differentiate certificate, bill, ticket to sentence
According to or other printed articles the true and false.
Reference picture 7, inspection equipment 600 provided in an embodiment of the present invention, including in previous embodiment two to four
The optical security features detection means 610 of offer, and instruction device 620；
Optical security features detection means 610, for detecting the presumptive area on detected material, and will detection
As a result it is sent to instruction device；
Instruction device 620, the testing result provided according to optical security features detection means 610 export tested
Survey whether thing is genuine indication signal.
Inspection equipment 600 provided in an embodiment of the present invention, in addition to：
Alarm device 630, for receiving the testing result of the offer of optical security features detection means 610, and
According to the testing result outputting alarm audio signal.
In optical security features detection method and device provided in an embodiment of the present invention, quilt is gathered using CIS
Detectable substance, such as certificate, the front of bill or other printed articles and side image, due to the incidence angle of light
View angle with presumptive area reflected light is fixed, therefore the image light gathered is more uniformly distributed, compared to conventional
CMOS or CCD camera detect the method and device of optical security features, optics provided by the invention
The detection method and device of anti-counterfeiting characteristic by certificate, bill machinery walk paper money intracavitary walk paper money situation influenceed it is smaller,
Obtain optical security features effect it is also ensured that.Secondly, for different certificates, bill, hologram
Even if picture position is different, the detection of different certificates, bill can also be completed by a set of equipment.
When issuing new edition certificate, bill, it is only necessary to complete device upgrade by software upgrading can.Relatively
For CMOS or CCD camera, CIS small volumes, installation is very convenient, is carrying out mechanical part
It can cause that structure is more compact during design, equipment assembling is also more convenient.For an equipment, as long as
A piece CIS is respectively installed on the two sides of passage, it is possible to complete to a certificate, bill front and back full width face
Color shifting ink, the optical security features such as hologram image detection.
According to the disclosed embodiment, those skilled in the art can be enabled to realize or use this hair
It is bright.To those skilled in the art, the various modifications of these embodiments be it will be apparent that and this
In the general principles that define can also be applied to other on the basis of the scope and spirit of the present invention are not departed from
Embodiment.Embodiment described above is only presently preferred embodiments of the present invention, not limiting this hair
It is bright, within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc.,
It should be included within protection scope of the present invention.
Claims (11)
1. a kind of detection method of optical security features, it is characterised in that this method includes：
Respectively from two different angle irradiation security pattern regions；
The reflected light of the security pattern region is received at a predetermined angle, obtains two different angles
Resulting image during irradiation；
More described two different images, to determine whether the security pattern is with optical security features
Pattern.
2. the method as described in claim 1, it is characterised in that the predetermined angular with it is described two not
Same irradiating angle is unequal.
3. method as claimed in claim 3, it is characterised in that first irradiating angle and described the
The difference of two irradiating angles is more than or equal to 30 degree.
4. a kind of contact-type image sensor CIS, it is characterised in that the CIS includes：Lens, light
Electric conversion chip and the first light source and secondary light source alternately lighted；
First light source is with the presumptive area on the first incident angle α 1 irradiation detected material；
With the presumptive area on the second incident angle α 2 irradiation detected material, described first enters the secondary light source
The incident angle αs 2 of firing angle α 1 and second are unequal；
The lens, the reflected light of the presumptive area is received with view angle β and imports the photoelectricity turn
Change chip；
The photoelectric conversion chip, the reflected light imported through the lens is received, obtains first light source point
Second figure of presumptive area when first image of the presumptive area and the secondary light source are lighted when bright
Picture.
5. CIS as claimed in claim 4, it is characterised in that first light source and secondary light source position
In the both sides of the lens, and the view angle β is 0 degree；
Or first light source and secondary light source are located at the same side of the lens, and the view angle β
More than 0 degree.
6. CIS as claimed in claim 4, it is characterised in that the photoelectric conversion chip is each time
When receiving the reflected light imported through the lens, a line view data of the presumptive area is gathered, and utilize
All view data synthesis described first image collected during first light source igniting, utilizes described second
All view data collected are synthesized into second image during light source igniting.
7. the CIS as described in any one of claim 4 to 6, it is characterised in that first incidence angle
α 1 is less than or equal to 30 degree, and second incident angle α 2 is more than or equal to 60 degree.
8. the CIS as described in any one of claim 4 to 6, it is characterised in that first incidence angle
α 1 and second incident angle α 2 difference are more than or equal to 50 degree.
9. a kind of optical security features detection means, it is characterised in that including recognition unit and as right will
Seek the contact-type image sensor CIS described in 4 to 6 any one；
The CIS, the first obtained image and the second image are exported to recognition unit；
The recognition unit, described first image and second image are handled, and described in comparison
First image and second image, to detect whether the presumptive area on detected material has optical anti-counterfeiting special
Sign.
10. one kind examines equipment, it is characterised in that including the optical security features described in claim 30
Detection means, and instruction device；
The optical anti-counterfeiting that the optical security features detection means is used to detect presumptive area on detected material is special
Sign, and testing result is sent to the instruction device；
Instruction device, the testing result provided according to the optical security features detection means, which exports, to be detected
Whether thing is genuine indication signal.
11. equipment as claimed in claim 10, it is characterised in that also include：
Alarm device, the testing result provided for receiving the optical security features detection means, and according to
The testing result outputting alarm audio signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610291269.9A CN107346579A (en) | 2016-05-05 | 2016-05-05 | Optical security features detection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610291269.9A CN107346579A (en) | 2016-05-05 | 2016-05-05 | Optical security features detection method and device |
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| CN107346579A true CN107346579A (en) | 2017-11-14 |
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ID=60252861
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| CN201610291269.9A Pending CN107346579A (en) | 2016-05-05 | 2016-05-05 | Optical security features detection method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110490200A (en) * | 2019-08-27 | 2019-11-22 | 阿里巴巴集团控股有限公司 | A kind of papers-scanning method, device and equipment |
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2016
- 2016-05-05 CN CN201610291269.9A patent/CN107346579A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110490200A (en) * | 2019-08-27 | 2019-11-22 | 阿里巴巴集团控股有限公司 | A kind of papers-scanning method, device and equipment |
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Application publication date: 20171114 |