CN106033525A - Image-type bar-code scanner used for express item bar code identification - Google Patents
Image-type bar-code scanner used for express item bar code identification Download PDFInfo
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- CN106033525A CN106033525A CN201510117000.4A CN201510117000A CN106033525A CN 106033525 A CN106033525 A CN 106033525A CN 201510117000 A CN201510117000 A CN 201510117000A CN 106033525 A CN106033525 A CN 106033525A
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Abstract
The invention discloses an image-type bar-code scanner used for express item bar code identification. The scanner is characterized in that the scanner comprises a LED light source, a C/CS lens, a CCD imaging module, a FPGA logic sequential management and image preprocessing module and a DSP high speed image processing module; and the C/CS lens, the CCD imaging module, the FPGA logic sequential management and image preprocessing module and the DSP high speed image processing module are successively connected. A DSP in the invention preferably adopts a DaVinci processor TMS320DM6467(T) of a Texas instrument. Two cores of ARM926EJ-STM RISC and TMS320C64*+TM DSP are arranged in the processor so that a 720M processing capability can be reached. An image acquisition front end uses a FPGA device of a Cyclone II series of an Altera company. Cost is low, power dissipation is low too and cost performance is high. DSP+FPGA high performance hardware support provides guarantee for algorithm efficiency. An LED external light source is installed. Through using hard light of the external light source, an influence of an environment light source on image quality can be reduced and exposure time can be shortened so that an image tail caused by long-time exposure can be prevented, and a bar code identification rate is greatly increased.
Description
Technical field
The application belongs to logistics express delivery technical field, particularly relates to a kind of for express mail bar code recognition
Image-type barcode scanner.
Background technology
Due to market without ready patterns to follow, little company is the most in addition, and automatization level compares for China's express delivery industry
Low, at many express delivery cargo handling operation staff such as carrying, handling, packaging, sorting, order and data process
Work mode of operation is still in occupation of leading position.
Courier packages starts until being finally completed and sending with charge free from pickup, obvious for artificial dependency,
Which greatly enhances the cost of express company.Further, along with increasing courier packages, logistics express delivery
Industry also will welcome more test in the processing procedure of express mail, such as response speed, parcel quality, send
Reach time and safety etc..The automatization of express delivery operation is an important channel and the hands improving express delivery efficiency
Section, is also an important trend of industry development.For adapting to this trend, for the self-service addressee of client
Express delivery intelligence inbox come out and be widely used in all kinds of place, but self-service post part problem still without
Method solves.
Summary of the invention
It is an object of the invention to provide a kind of image-type barcode scanner for express mail bar code recognition,
To overcome deficiency of the prior art.
For achieving the above object, the present invention provides following technical scheme:
The embodiment of the present application discloses a kind of image-type barcode scanner for express mail bar code recognition, including
LED light source, C/CS camera lens, CCD image-forming module, fpga logic timing management and Image semantic classification mould
Block and DSP high rate burst communication module, described C/CS camera lens, CCD image-forming module, FPGA
Logical sequence management is sequentially connected with image pre-processing module and DSP high rate burst communication module.
Preferably, in the above-mentioned image-type barcode scanner for express mail bar code recognition, described
DSP high rate burst communication module is selected from processor TMS320DM6467 (T), the most built-in
ARM926EJ-STM RISC and TMS320C64 ×+TM DSP two core.
Preferably, in the above-mentioned image-type barcode scanner for express mail bar code recognition, described
Fpga logic timing management and image pre-processing module are the Cyclone II series of altera corp
FPGA device.
Compared with prior art, it is an advantage of the current invention that: DSP of the present invention is preferably used Texas Instrument
Leonardo da Vinci (DaVinciTM) the processor TMS320DM6467 (T) of (Texas Instrument), interior wherein
Put ARM926EJ-STM RISC and TMS320C64 ×+TM DSP two core, can reach 720M
Disposal ability.Image acquisition front end uses the FPGA device of the Cyclone II series of altera corp,
Its low cost, low in energy consumption, cost performance is high.The efficiency that high-performance hardware support is algorithm of DSP+FPGA
Provide guarantee.Additionally it is mounted with LED external light source, utilizes the high light of external light source, can lower
The environment light source impact on picture quality, and time of exposure can be reduced, to prevent from exposing for a long time
The smear caused, drastically increases the discrimination of bar code.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only some embodiments described in the application, for those of ordinary skill in the art
From the point of view of, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 show in the specific embodiment of the invention structural representation of intelligence express box system；
Fig. 2 show the principle schematic of the fixed barcode scanner of image-type in the specific embodiment of the invention；
Fig. 3 show in the specific embodiment of the invention the big gradient pixel point of zones of different, region in image
Integral gradient direction and gradient orientation histogram feature, wherein (a) and (b) refers to bar code district
Territory, (c) and (d) refers to non-bar code region；
Fig. 4 show bar code detection zone scheme of installation in the specific embodiment of the invention.
Detailed description of the invention
Express delivery belongs to high cost, the industry of low profit.Most of Express firm profit margins are less than 5%, and go back
Constantly declining, but manually, the cost such as soil, fund the most substantially go up, human cost has accounted for domestic
Four to the fifty percent of express delivery cost.According to current industry development trend, in conjunction with the technical merit of present stage,
Technical solution of the present invention product can realize automatization and collect and sort the function of courier packages, actual solution thing
The cost of labor problem that stream express delivery industry is growing, improves the work efficiency of logistics express delivery industry conscientiously.
The core technology of the technical program:
1, the express delivery odd numbers automatization for express mail identifies, utilizes and is integrated with light source, camera lens, ccd image
Collection, fpga logic management, dsp processor, reading code algorithm and the fixed bar code scan of function such as communicate
Device carries out the bar code Dynamic Recognition of express mail；
2, for the on-line measurement of weight of express mail, weight dynamic sensing system is utilized to realize the weight to express mail
Amount obtains；
3, for the dimensional measurement of express mail, computer vision technique is utilized to combine light curtain systematic survey express mail three
Dimension information.
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawings to the present invention
Detailed description of the invention be described in detail.The example of these preferred implementations has carried out example in the accompanying drawings
Show.The embodiments of the present invention shown in accompanying drawing and described with reference to the accompanying drawings are merely exemplary, and
The present invention is not limited to these embodiments.
Here, also, it should be noted in order to avoid having obscured the present invention because of unnecessary details,
Accompanying drawing illustrate only and according to the closely-related structure of the solution of the present invention and/or process step, and save
Other details little with relation of the present invention are omited.
Shown in ginseng Fig. 1, intelligence express box system includes casing 1 and is installed on the touch on described casing
Display screen 2, described casing 1 has an express mail entrance 6 and express mail outlet 7, the inside of described casing 1
Being formed with express mail cog region 3 and express mail memory block 4, described express mail cog region 3 is provided with conveyer belt 5, institute
Bar code number identification device, on-line weighting system and dimensional measurement it is additionally provided with in stating express mail cog region 3
System.
Further, express mail cog region 3 extends along the longitudinally of casing 1, express mail entrance 6 and express mail
Outlet 7 lays respectively at the head and the tail two ends of conveyer belt 5.The top of express mail cog region 3 is also formed with off-sorting station 8,
This off-sorting station 8 exports 7 one end in express mail and connects with express mail cog region 3.
Further, in express mail memory block, it is provided with express mail storage induction installation, this express mail storage sensing dress
Put and automatically trigger pickup signal to courier mobile phone when express mail memory block capacity is less than setting value.Preferably
, when express mail memory block active volume is less than 10%, can the relevant courier pickup of notice in time.
Further, safety monitoring device is also included.Prevent someone from stealing or premeditated damage facility.Relevant
Video will retain three months, check in case follow-up.The safety inspection of express mail in addition to video monitoring, follow-up by
Express company's posteriority, to ensure safety.
Further, module of paying the fees also is included.Pay charge way can be swipe the card, Alipay or cash etc..
Further, also including printing bar code device, this bar code records posts part address information.
Further, described bar code number identification device uses image-type barcode scanner.Image-type
Fixed barcode scanner, it is achieved have can quickly read, anti-distortion, the feature such as fouling resistance, the big depth of field
Bar Code.
Further, described Size Measuring System uses computer vision technique to combine light curtain system.
The embodiment of the present application also discloses a kind of intelligence express box and posts part method, including:
(1), sender selects to input by touching display screen: sender telephone and address, addressee's electricity
Words and address；
(2), address information and address bar code automatic printing are incited somebody to action by printing equipment to express delivery list, sender
It is labelled on express mail after the signature of express delivery list, puts into express mail entrance, by conveyer belt by incoming for express mail express mail identification
District；
(3), in express mail cog region, the dimensional measurement of canbe used on line express mail, weigh, express delivery odd numbers identification,
Automatic charging, and by all Message Entry Systems, it is shown in the touch display screen used by sender, prompting
Sender pays the fees；
(4), sender confirm after sign by touch screen, system preservation sender signature data, post
After part people pays the fees successfully, express mail is put in express mail memory block by backstage automatically；
(5) if sender terminates posting part behavior before paying the fees, express mail transmission is exported by system to express mail, returns
Also sender.
In sum, the know-why of this case is: is passed to backstage by transmission belt from cabinet oral instructions and carries out online
Detection, arrives first at bar code scan region, the express delivery odd numbers on recognition express mail odd numbers, subsequently enters and weigh
District obtains the weight of express mail, finally obtains the length, width and height of parcel in volume detection region, and then completes soon
The detection of part.Cost notifying client is posted by the associated information calculation of express mail, after client pays the fees successfully,
Trig control signal, puts into suitable deposit position by express mail.
Express delivery odd numbers is bar code, generally uses code128 coded format.Therefore express delivery odd numbers can use
Barcode scanner identifies.Two kinds of the most conventional barcode scanners are laser scanner and image-type scanning
Device, the difference of both scanning devices see table 1:
The feature contrast of 1: two kind of scanning device of table
| Feature | Laser scanner | Image-type scanning device |
| Read rate | Low | High |
| Omnibearing code reads | No | It is |
| Quick Response Code reads | No | It is |
| Multiple bar codes read simultaneously | No | It is |
| Operating distance | Short | Long |
| Service life | Short | Long |
| Visualization | No | It is |
| Picture archiving | No | It is |
| Bar code quality is assessed | No | It is |
| Communication type | Restricted | Abundant |
| Expansibility | Low | High |
| Installation Flexibility | Restricted | It is |
| Scanned speed | Slow or static | At a high speed |
| The visual field | Restricted | Bigger |
Owing to this case system uses full-automatic on-line checking mode, laser scanner cannot meet native system
Demand, therefore we use the fixed barcode scanner of image-type, it is achieved have can quickly read, anti-abnormal
Become, the Bar Code of the feature such as fouling resistance, the big depth of field, and set up network service, man-machine interaction one
Body software platform.
Shown in ginseng Fig. 2, image-type barcode scanner mainly includes LED light source, C/CS camera lens, CCD
Image-forming module, fpga logic timing management and image pre-processing module and DSP high rate burst communication module.
In above-mentioned scanning device, DSP is preferably used the Leonardo da Vinci of Texas Instrument (Texas Instrument)
(DaVinciTM) processor TMS320DM6467 (T), the most built-in ARM926EJ-STM RISC
With TMS320C64 ×+TM DSP two core, can reach 720M disposal ability.Image acquisition front end makes
Be altera corp Cyclone II series FPGA device, its low cost, low in energy consumption, sexual valence
Ratio is high.The efficiency that high-performance hardware support is algorithm of DSP+FPGA provides guarantee.Additionally install
LED external light source, utilizes the high light of external light source, can lower the environment light source shadow to picture quality
Ring, and time of exposure can be reduced, to prevent from exposing the smear caused for a long time, be greatly enhanced
The discrimination of bar code.
Bar code location algorithm based on direction gradient characteristic matching designs
At collected by camera after image, due to environment light source in production environment, the depth of field, transfer rate,
The noises of the barcode size or text field etc. affect, and need to carry out image pretreatment, promote picture quality.Due to phase
The initial data of machine collection is yuv data, and Y-component is exactly equal to the gray-scale map of image, the most only needs
Directly intercept the Y-component of initial data.Image is carried out binary conversion treatment, and binary conversion treatment needs choosing
Fixed suitable threshold value, threshold value to choose the result to binaryzation the most crucial, done by noise in image
Disturb, be difficult to select a pervasive threshold value, therefore before carrying out binary conversion treatment, need to carry out at denoising
Reason.In general, denoising may select linear filtering and nonlinear filtering.Linear filtering is (such as average
Filtering) use the average gray value of pixel in the neighborhood that determines of filter template to replace each picture in image
The value of element, this process reduces " sharply " change of gradation of image, thus eliminates gray level and drastically change
The random noise caused.But find in reality is tested, mean filter makes soft edge, fixed
Position effect is poorer.Through analyzing, the edge of bar code has the characteristic of the sharp change of gray level equally,
Therefore mean filter serves retroaction to bar code location.And the median filter method in nonlinear filtering
Can effectively solve this problem.Medium filtering by the pixel near center pixel is ranked up statistics,
Value according still further to the value replacement center pixel that its result determines.Medium filtering both can remove isolated noise point
Edge strength will not be made again to lose, and therefore the present embodiment will use median filter method as denoising method.
After completing medium filtering, image can be carried out binary conversion treatment.The image obtained after binary conversion treatment
In, only two kinds of pixels of black and white, there is no brightness gradual change between monochrome pixels, therefore can be in bar code area
There is the pixel of a lot of gray scale generation cataclysm in territory.These pixels have unified gradient direction.Utilize this
One feature, we can design algorithm based on gradient direction characteristic matching.It is contemplated that, in bar code district
Territory, it will have the point in a large number with relatively high-gray level Grad, and the Grad of these big gradient point tends to
Unanimously.Thus can orient the barcode size or text field.
Fig. 3 gives the big gradient pixel point of zones of different in image (by red block labelling) (by blueness
Point labelling), integral gradient direction, region (being gone out by green line segment mark), and gradient orientation histogram feature.
It can be seen that be all in the image in bar code region, the gradient pixel point quantity with big value is more,
Integral gradient direction is more consistent, is all the direction being perpendicular to bar code mark line, and its gradient direction is straight
Side's figure distribution trend is more consistent, and matching degree is higher；And background area (including the retroreflective regions in background)
In image, having the gradient pixel point negligible amounts of big value, bar code region is compared in integral gradient direction to be had bright
Aobvious difference, the distribution of its gradient orientation histogram also has very big difference, with bar code region histogram matching degree relatively
Low.Generally speaking, the gradient orientation histogram of bar code area image, big gradient pixel point quantity, gradient
Direction character can feature with background area image be distinguished significantly.
Native system uses the installation diagram of the fixed barcode scanner of image-type as shown in Figure 4, when express mail arrives
After shooting area, by photoswitch trigger scanner repeatedly barcode scanning, until this express mail shoots district by camera
Territory.Bar code recognition result is issued upper computer software by scanning device.
The real-time image acquisition of above-mentioned high speed and processing system, DSP embedded framework and the figure of height optimization
As reading code algorithm, it can be ensured that reading is under high-speed motion state and identifies the bar code at article surface continuously.
Finally, in addition it is also necessary to explanation, term " include ", " comprising " or its any other variant meaning
Containing comprising of nonexcludability so that include the process of a series of key element, method, article or
Equipment not only includes those key elements, but also includes other key elements being not expressly set out, or also wraps
Include the key element intrinsic for this process, method, article or equipment.
Claims (3)
1. the image-type barcode scanner for express mail bar code recognition, it is characterised in that include LED
Light source, C/CS camera lens, CCD image-forming module, fpga logic timing management and image pre-processing module,
With DSP high rate burst communication module, described C/CS camera lens, CCD image-forming module, fpga logic
Timing management is sequentially connected with image pre-processing module and DSP high rate burst communication module.
Image-type barcode scanner for express mail bar code recognition the most according to claim 1, its
It is characterised by: described DSP high rate burst communication module is selected from processor TMS320DM6467 (T),
The most built-in ARM926EJ-STM RISC and TMS320C64 ×+TM DSP two core.
Image-type barcode scanner for express mail bar code recognition the most according to claim 1, its
It is characterised by: described fpga logic timing management and image pre-processing module are altera corp
The FPGA device of Cyclone II series.
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| CN112179272A (en) * | 2020-09-02 | 2021-01-05 | 顺丰科技有限公司 | Express mail full-automatic multi-face code scanning weighing volume measuring system and processing method thereof |
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| CN117291209A (en) * | 2023-02-02 | 2023-12-26 | 深圳牛图科技有限公司 | Bar code recognition intelligent terminal based on multi-core heterogeneous architecture |
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