CN103763451A - Method and equipment for eliminating exposure points in window letter illumination picture taking process - Google Patents
Method and equipment for eliminating exposure points in window letter illumination picture taking process Download PDFInfo
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- CN103763451A CN103763451A CN201410014250.0A CN201410014250A CN103763451A CN 103763451 A CN103763451 A CN 103763451A CN 201410014250 A CN201410014250 A CN 201410014250A CN 103763451 A CN103763451 A CN 103763451A
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Abstract
The invention relates to envelope information acquisition of window letters, and belongs to the field of post information acquisition. A method for eliminating exposure points in the window letter illumination picture taking process is characterized by including the steps that when the window letters move to a picture reading region, double-layer polarization is conducted on light sources of a scanning camera for reading pictures, light of the light sources is scattered through first layer polarization and is changed into directional polarized light, the probability that scattered light generates reflecting light on the surfaces of plastic films of the window letters is reduced, and light intensity is weakened; overlapped light which still has bright spots after first layer polarization is filtered out through second layer polarization by adjusting the polarization angle, clear information of a window is restored in the pictures taken through the camera, and then the light reflecting bright spots in the picture taking process are eliminated, and integral information of the wholly-sealed window letters is accurately recognized. According to the method and equipment, double layer polarization is conducted on scattered light of the light sources, the effect of eliminating the light reflecting bright spots in the window letter picture taking process is achieved, and therefore integral information of envelopes can be accurately restored through envelope information acquisition equipment designed based on the method.
Description
Technical field
The present invention relates to the envelope information gathering of window letter, while relating in particular to a kind of window letter illumination capture, eliminate the method and apparatus of exposure point.
Background technology
When general envelope carries out envelope information gathering on the equipment of envelope information acquiring instrument, due to the out-of-flatness of letter, easily cause the image brightness of taking pictures or scan out inhomogeneous, especially on envelope, the window with plastic film window is believed, because the plastic film of window letter is rough, under the irradiation that bright light source is provided for taking pictures, only diverging light after window letter surface reflection, the secondary reflection optical superposition causing due to injustice impinges upon the same area, surface at plastic film just produces a lot of highlight bars, the a lot of information of image after taking pictures is affected by bright spot, therefore accurate recognition image information.
Summary of the invention
The method and apparatus of eliminating exposure point when technical problem to be solved by this invention is to provide a kind of window letter illumination capture, the plastic film that solves present window letter can produce a lot of bright spots under the irradiation of light source, has affected the defect of the accuracy rate of image recognition.
Technical scheme
During a kind of window letter illumination capture, eliminate the method for exposure point, it is characterized in that: when window letter moves to reading image region, be used for the double-deck polarization of light source process of the scanning camera of reading image, ground floor polarization is by the diverging light of light source, become directive polarised light, reduce diverging light and impinged upon the catoptrical probability of window letter plastic film surface generation, weakened light intensity simultaneously, second layer polarization is by adjusting the angle of polarization, filter out the superimposed light of the bright spot still existing after ground floor polarization, the image that enters camera has just reduced the clear information of window, thereby eliminated the reflective bright spot while taking pictures, the accurately complete information of the whole envelope window letter of identification.
Described ground floor polarization is arranged on the light source front of scanning camera, and second layer polarization is arranged on scanning camera.
A kind of equipment of applying above-mentioned method and window letter being carried out to envelope information gathering, it is characterized in that: comprise for letter module, separation module, accelerating module and reading image module, from the confession for letter module casually imports mail, through separation module, mail is separated to an envelope envelope and be sent to accelerating module, through accelerating module, the single envelope mail after separating is delivered to reading image module again and read the information on mail envelope, described reading image module comprises scanning camera and for bright light source is provided to scanning camera, described light source front is provided with one deck polarizer, on described scanning camera or scanning camera front is provided with two layers of polarizer.
Described light source and scanning camera arrange in a certain angle, at light source right opposite, are provided with reflecting optics, and described one deck polarizer is parallel fits in light source setting.
Beneficial effect
The present invention is by carrying out two-layer polarization by the diverging light of light source, at one deck, reduce and produce catoptrical probability, weakened on the basis of light intensity, two layers of polarization are by adjusting angle, filter out the superimposed light of the bright spot still existing after ground floor polarization, thereby reach the effect of eliminating reflective bright spot when window letter is taken pictures, realized the object of accurate identification envelop image information; The envelope information acquiring instrument of design can eliminate substantially completely because window is believed the uneven reflective defect of bringing of surperficial plastic film based on this, accurately reduces the complete information of envelope.
Accompanying drawing explanation
Fig. 1 is envelope information collecting device internal structure schematic diagram of the present invention.
Fig. 2 is the IMAQ part enlarged diagram of envelope information collecting device of the present invention inside, and in figure, arrow is light reflection direction.
Fig. 3 is the envelope frame collection effect schematic diagram that polarizer is not installed.
Fig. 4 is the envelope frame collection effect schematic diagram of installing after one-level polarizer.
Fig. 5 is the envelope frame collection effect schematic diagram of installing after two-stage polarizer.
Wherein: 1-supplies letter module, 2-separation module, 3-accelerating module, 4-reading image module, 5-scanning camera, 6-reflecting optics, 7-light source, 8-reads window, 9-one deck polarizer, bis-layers of polarizer of 10-, 11-image acquisition areas, 12-envelope, A-walks letter passage.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.
An only electromagnetic wave, the electric field vibration of light is shear wave, the electric oscillation of light is in the plane vertical with light direction of advance.Natural daylight be various characteristics at all identical uniform light of all directions, the electric oscillation of natural daylight is all also completely uniformly in all directions of the plane of oscillation.If the electric oscillation of light wave is only limited in some definite directions, has been exactly polarised light.And polarizer is exactly a kind of sheet-form optical functional material that produces and detect polarised light.The electric oscillation of polarised light is confined in some specific directions, thereby polarised light is directive.Equally, polarizer is also directive.Polarizer has a specific direction to point to, and is referred to as the axis of homology, and the electric oscillation vertical with this direction is blocked, and can freely pass through with the parallel consistent electric oscillation of this direction.Natural daylight, by after polarizer, has just become polarised light like this.Equally, when polarised light sees through during polarizer, if the transmission direction of the direction of vibration of polarised light and polarizer is parallel, just stopped hardly when consistent, at this moment polarizer is transparent.If when the transmission direction of the direction of vibration of polarised light and polarizer is perpendicular, almost can not pass through completely, it is opaque that polarizer has just become.
The present invention utilizes this principle, by the double-deck polarization of light source process of the scanning camera for reading image, ground floor polarization is by the diverging light of light source, become directive polarised light, reduce diverging light and impinged upon the catoptrical probability of window letter plastic film surface generation, weakened light intensity simultaneously, second layer polarization is by adjusting the angle of polarization, filter out the superimposed light of the bright spot still existing after ground floor polarization, the image that enters camera has just reduced the clear information of window, thereby eliminated the reflective bright spot while taking pictures, the accurately complete information of the whole envelope window letter of identification, thereby improved envelope frame, it is other accuracy rate.
This method is applied on the equipment of envelope information gathering, the structure of equipment is illustrated as accompanying drawing 1, comprise for letter module 1, separation module 2, accelerating module 3 and reading image module 4, from the confession for letter module 1 casually imports mail, through separation module 2, mail is separated to an envelope envelope and be sent to accelerating module 3, through accelerating module 3, the single envelope mail after separating is delivered to reading image module 4 again and read the information on mail envelope, described reading image module 4 comprise scanning camera 5 and for give scanning camera 5 bright light source 7 is provided, apply method of the present invention, in described light source 7 fronts, one deck polarizer 9 is set, on described camera or camera front install two layers of polarizer 10 be set.
Described light source 7 and scanning camera 5 arrange in a certain angle, at light source 7 right opposites, are provided with reflecting optics 6, and the parallel light source 7 that fits in of described one deck polarizer 9 arranges.The IMAQ part of device interior is amplified signal and is illustrated as accompanying drawing 2, and light transmission one deck polarizer 9 of light source 7 appears, and passes through reflecting optics 6, then enters camera through two layers of polarizer 10, eliminates exposure point while reaching illumination capture.
During actual use, window letter is believed module 1, separation module 2, accelerating module 3 these three mechanical modules by confession, and an envelope window letter is sent to reading image module 4, and camera starts reading image under the control of photosignal.Light source 7 is taken pictures light is provided for scanning camera 5, because the plastic film of window letter is uneven, only diverging light after reflection, secondary reflection optical superposition impinges upon the same area, surface at plastic film just produces a lot of highlight bars, the a lot of information of image after taking pictures is affected by bright spot, accurately recognition image information.Accompanying drawing 3, for the effect signal after the envelope information collecting device of polarizer gathers the envelope frame of an envelope letter is not installed merely, can be seen a lot of bright spots and uneven, and envelope general image is fuzzyyer.
When light source 7 places at envelope information collecting device have added after a polarizer, by the diverging light of light source, become directive polarised light, reduce diverging light and impinged upon the catoptrical probability of plastic film surface generation, weakened light intensity simultaneously.If the surface of window letter is not rough, light can equidirectional reflection, just can not produce bright spot.But because window is believed surperficial out-of-flatness, still can produce reflection bright spot.Accompanying drawing 4, for the envelope frame collection effect signal after one-level polarizer is installed, can see that brightness obviously reduces, but envelop image is than will be clear that still there is rough phenomenon before.
Circular polarizer is installed on camera again, adjust the angle of polarizer, filter out the superimposed light of bright spot, the image that enters camera has just reduced the clear information of window completely, as the signal of accompanying drawing 5, for the envelope frame collection effect of this envelope mail after the envelope information collecting device scanning of installing after two-stage polarizer, not only reproduced completely clearly the information on envelope, and can obviously see the rough phenomenon of having eliminated window letter, become steadily clear.
Claims (4)
1. when a window is believed illumination capture, eliminate the method for exposure point, it is characterized in that: when window letter moves to reading image region, be used for the double-deck polarization of light source process of the scanning camera of reading image, ground floor polarization is by the diverging light of light source, become directive polarised light, reduce diverging light and impinged upon the catoptrical probability of window letter plastic film surface generation, weakened light intensity simultaneously, second layer polarization is by adjusting the angle of polarization, filter out the superimposed light of the bright spot still existing after ground floor polarization, the image that enters camera has just reduced the clear information of window, thereby eliminated the reflective bright spot while taking pictures, the accurately complete information of the whole envelope window letter of identification.
2. the method for eliminating reflective bright spot when window letter as claimed in claim 1 is taken pictures, is characterized in that: described ground floor polarization is arranged on the light source front of scanning camera, and second layer polarization is arranged on scanning camera.
3. the equipment applying the method for claim 1 and window letter is carried out to envelope information gathering, it is characterized in that: comprise for letter module, separation module, accelerating module and reading image module, from the confession for letter module casually imports mail, through separation module, mail is separated to an envelope envelope and be sent to accelerating module, through accelerating module, the single envelope mail after separating is delivered to reading image module again and read the information on mail envelope, described reading image module comprises scanning camera and for bright light source is provided to scanning camera, described light source front is provided with one deck polarizer, on described scanning camera or scanning camera front is provided with two layers of polarizer.
4. the equipment that window letter is carried out to envelope information gathering as claimed in claim 3, is characterized in that: described light source and scanning camera arrange in a certain angle, at light source right opposite, is provided with reflecting optics, and described one deck polarizer is parallel fits in light source setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410014250.0A CN103763451A (en) | 2014-01-13 | 2014-01-13 | Method and equipment for eliminating exposure points in window letter illumination picture taking process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410014250.0A CN103763451A (en) | 2014-01-13 | 2014-01-13 | Method and equipment for eliminating exposure points in window letter illumination picture taking process |
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| CN103763451A true CN103763451A (en) | 2014-04-30 |
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| CN201410014250.0A Pending CN103763451A (en) | 2014-01-13 | 2014-01-13 | Method and equipment for eliminating exposure points in window letter illumination picture taking process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106161864A (en) * | 2016-07-18 | 2016-11-23 | 哈尔滨理工大学 | A kind of multiconductor image collecting device |
| CN106353952A (en) * | 2016-10-28 | 2017-01-25 | 山东鲁能智能技术有限公司 | Polarizer-containing transformer substation indoor inspection robot image acquisition system and method |
| CN107776461A (en) * | 2017-11-10 | 2018-03-09 | 北京航星机器制造有限公司 | A kind of mail inspection onboard system |
| EP3348334A1 (en) | 2017-01-17 | 2018-07-18 | Mail Professionals GmbH | Recognition systems for address data on physical mail |
| CN113515966A (en) * | 2021-08-10 | 2021-10-19 | 海伯森技术（深圳）有限公司 | Multi-spectrum light illumination code scanning method and device, storage medium and equipment |
| CN115793225A (en) * | 2023-01-10 | 2023-03-14 | 南京木木西里科技有限公司 | Image acquisition reflection elimination adjusting device and system thereof |
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| CN202043167U (en) * | 2011-02-18 | 2011-11-16 | 上海华勤通讯技术有限公司 | Mobile phone with circular polarizer |
| CN202600361U (en) * | 2012-06-08 | 2012-12-12 | 合肥京东方光电科技有限公司 | Exposure machine and illumination control device of the same |
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| US5748376A (en) * | 1996-04-17 | 1998-05-05 | Industrial Technology Research Institute | High optical throughput liquid-crystal projection display system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106161864A (en) * | 2016-07-18 | 2016-11-23 | 哈尔滨理工大学 | A kind of multiconductor image collecting device |
| CN106353952A (en) * | 2016-10-28 | 2017-01-25 | 山东鲁能智能技术有限公司 | Polarizer-containing transformer substation indoor inspection robot image acquisition system and method |
| EP3348334A1 (en) | 2017-01-17 | 2018-07-18 | Mail Professionals GmbH | Recognition systems for address data on physical mail |
| WO2018134216A1 (en) | 2017-01-17 | 2018-07-26 | Mail Professionals Gmbh | Recognition system for address data on physical mail |
| CN107776461A (en) * | 2017-11-10 | 2018-03-09 | 北京航星机器制造有限公司 | A kind of mail inspection onboard system |
| CN113515966A (en) * | 2021-08-10 | 2021-10-19 | 海伯森技术（深圳）有限公司 | Multi-spectrum light illumination code scanning method and device, storage medium and equipment |
| CN113515966B (en) * | 2021-08-10 | 2024-03-15 | 海伯森技术（深圳）有限公司 | Code scanning method, device, storage medium and equipment for multispectral light illumination |
| CN115793225A (en) * | 2023-01-10 | 2023-03-14 | 南京木木西里科技有限公司 | Image acquisition reflection elimination adjusting device and system thereof |
| CN115793225B (en) * | 2023-01-10 | 2023-05-30 | 南京木木西里科技有限公司 | Image acquisition reflection elimination adjusting device and system thereof |
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Application publication date: 20140430 |