CN105469092A - Scanning assistance positioning system, bar code scanning device, and scanning assistance positioning method - Google Patents
Scanning assistance positioning system, bar code scanning device, and scanning assistance positioning method Download PDFInfo
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- CN105469092A CN105469092A CN201510884044.XA CN201510884044A CN105469092A CN 105469092 A CN105469092 A CN 105469092A CN 201510884044 A CN201510884044 A CN 201510884044A CN 105469092 A CN105469092 A CN 105469092A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/24—Aligning, centring, orientation detection or correction of the image
- G06V10/245—Aligning, centring, orientation detection or correction of the image by locating a pattern; Special marks for positioning
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/10861—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices sensing of data fields affixed to objects or articles, e.g. coded labels
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/1439—Methods for optical code recognition including a method step for retrieval of the optical code
- G06K7/1443—Methods for optical code recognition including a method step for retrieval of the optical code locating of the code in an image
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K2207/00—Other aspects
- G06K2207/1011—Aiming
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Multimedia (AREA)
- Projection Apparatus (AREA)
Abstract
The invention provides a scanning assistance positioning system, a bar code scanning device, and a scanning assistance positioning method. The system comprises a projection lens module group which enables projection light to be projected to a target object and captures an optical signal of the target object. The system also comprises an image processing module group which is arranged to be corresponding to the projection lens module group and is used for sensing the optical signal; a control unit which is coupled to the image processing module group; and a prompt unit which is coupled to the control unit. The image processing module group forms a first image according to the optical signal. The control unit obtains a modulation transfer function value of the first image, and judges whether the modulation transfer function value accords with a first preset value. If the modulation transfer function value does not accord with the first preset value, the control unit controls the prompt unit to send warning information. Therefore, the system sends warning information, so as to enable a user to judge in real time whether the scanning position is accurate or not and to make timely adjustment.
Description
Technical field
The present invention relates to scanning field, particularly relate to a kind of scanning aided positioning system and the method with prompt facility.
Background technology
Barcode scanner is also called bar code scan rifle/reader by people usually, for information that bar code reading comprises, utilize optical principle, be transferred to computer or other equipment after the content decoding of bar code by data line or wireless mode, one dimension, two-dimensional bar code scanner can be divided into.Be widely used in the bar code of the items scanning such as supermarket, logistics express delivery, library, document.The structure of barcode scanner is generally following a few part: light source, receiving trap, photoelectric conversion part, decoding scheme, computer interface.The basic functional principle of scanner is: the light sent by light source is above irradiation optical system to bar code symbol.The light be reflected back on photoelectric commutator, is interpreted as through code translator the digital signal that computing machine can directly accept through optical system imaging.Except one, the classification of two-dimensional bar code scanner.Also can be categorized as: CCD, full angle laser and laser hand formula barcode scanner.
But, in the process of actual scanning, when scanner is aimed at the mark object by user, often occur that the light that light source sends cannot accurately be aimed at bar code and cause scanning unsuccessfully, and user can not discover in time, and cause using inconvenience.
Therefore, a kind of novel scanning aided positioning system of design, bar code scanner and scanning assisted location method is necessary, to overcome above-mentioned defect.
Summary of the invention
The object of the present invention is to provide a kind of novel scanning aided positioning system, bar code scanner and scanning assisted location method, it can in use whether Timeliness coverage scanning position be correct.
For achieving the above object, the invention provides a kind of scanning aided positioning system, comprising: projection lens module, projection projection ray is to object and catch the light signal of this object; Image procossing module, to arranging by projection lens module, this image procossing module is in order to sense this light signal; Control module, couples this image procossing module; And Tip element, couple this control module; Wherein, this image procossing module forms the first image according to this light signal; This control module obtains the modulating transfer function value of this first image and judges whether this modulating transfer function value conforms to the first preset value, if this modulating transfer function value does not conform to this first preset value, then this control module controls this Tip element and sends information warning.
Preferably, this projection lens module project this projection ray to this object and reflection to form this light signal.
Preferably, this image procossing module has image sensor, and this image sensor is to arranging by projection lens module, and this image sensor is in order to sense this light signal.
Preferably, this first preset value has the first predeterminable range; This control module obtains the projector distance of this projection lens module to this object according to this modulating transfer function value; If this projector distance does not conform to this first predeterminable range, then this control module controls this Tip element and sends this information warning, adjusts this projector distance according to this information warning.
Preferably, this Tip element is light-emitting device, loudspeaker arrangement or vibrating device.
Preferably, if this modulating transfer function value conforms to this first preset value, then this control module does not control this Tip element and sends this information warning.
Preferably, this scanning aided positioning system also comprises storage unit, couples this control module, and this first preset value is stored in this storage unit.
For arriving above-mentioned purpose, the present invention separately provides a kind of bar code scanner, and this bar code scanner comprises main part and above-mentioned scanning aided positioning system, and this scanning aided positioning system is arranged at this main part.
For achieving the above object, the present invention separately provides a kind of scanning assisted location method, and this scanning assisted location method comprises step: projection projection ray is to object and catch the light signal of this object; The first image is formed according to this light signal; And obtain the modulating transfer function value of this first image and judge whether to send information warning according to this modulating transfer function value and the first preset value.
Preferably, this first preset value is the first predeterminable range, wherein, judge whether that the step sending information warning is for obtain projector distance according to this modulating transfer function value according to this modulating transfer function value and this first preset value, if this projector distance does not conform to this first predeterminable range, then send this information warning.
Compared with prior art, scanning aided positioning system provided by the invention, bar code scanner and scanning assisted location method, by receiving throw light to form the first image, obtain this first image modulation transfer function values to judge whether to be positioned at correct scanning position, thus provide warning and can obtain Real-time Feedback adjust scanning position in time to allow user.
Accompanying drawing explanation
Fig. 1 is the structural representation of the bar code scanner scanning object of the embodiment of the present invention;
Fig. 2 is the scanning aided positioning system structured flowchart of the embodiment of the present invention;
Fig. 3 is the structured flowchart of the image procossing module of the embodiment of the present invention;
Fig. 4 is the structured flowchart of the control module of the embodiment of the present invention;
Fig. 5 is the schematic flow sheet of the scanning assisted location method of another embodiment of the present invention;
Fig. 6 is the schematic flow sheet of the scanning assisted location method of further embodiment of this invention.
Embodiment
For making there is further understanding to object of the present invention, structure, feature and function thereof, embodiment is hereby coordinated to be described in detail as follows.
Some vocabulary is employed to censure specific element in the middle of instructions and claims.Person with usual knowledge in their respective areas should understand, and same element may be called by manufacturer with different nouns.This specification and claims book is not used as the mode of distinguish one element from another with the difference of title, but is used as the criterion of differentiation with element difference functionally." comprising " mentioned in the middle of instructions and claim is in the whole text open term, therefore should be construed to " including but not limited to ".
Shown in Fig. 4, disclose the structural representation that the present invention scans the first embodiment of aided positioning system, scanning aided positioning system 002 is for bar code scanner 001, see Fig. 1, bar code scanner 001 comprises main part 7 and scanning aided positioning system 002, scanning aided positioning system 002 is arranged on main part 7, scanning aided positioning system 002 comprises projection lens module 1, image procossing module 2, control module 3, Tip element 4, light source 5 and switchgear 6, switchgear 6 is in order to control the projection ray L of projection lens module 1 projection source 5 to object M, in practical application, this object M is bar code or two-dimensional bar code, this object M has the first scope, this projection ray L to be projected on this object M and reflection to form light signal N.
Projection lens module 1, this light signal N reflected in order to acquisition to this object, when needs scan this object M, can by projection lens module 1 just to this object M; Projection lens module 1 is just to image procossing module 2, and this light signal N obtained is sent to image procossing module 2 by projection lens module 1.In practical application, the light source that this projection ray L of this projection lens module 1 projection produces scanning ray by bar code scanner 001 produces, and namely projection lens module 1 projects the outlet cloth of outlet and scanning ray setting in same position.
Image procossing module 2, corresponding projection lens module 1 is arranged, and image procossing module 2 lotus root connects control module 3, and image procossing module 2 is in order to sense this light signal N and to form the first image S according to this light signal N; Preferably, image procossing module 2 comprises image sensor 21 and a point color element 22, see Fig. 3; Image sensor 21 is just arranged projection lens module 1, image sensor 21 lotus root connects point color element 22, image sensor 21 senses this light signal N and is sent to point color element 22, and form this first image S again by a point color element 22, this first image S comprises red, green, blue trichromatic diagram.
Control module 3, electrical connection image sensing device 2, this control module 3 comprises adjustment transport function (ModulationTransferFunction, MTF) computing module 31, target range computing module 32, comparison module 33 and storage unit 34; Storage unit 34 stores the first preset value b, and preferably, this first preset value b is the first predeterminable range; Adjustment transport function calculates module 31 and is electrically connected a point color element 22, and target range computing module 32 is electrically connected target range computing module 32, and comparison module 33 is electrically connected target range computing module 32 and storage unit 34.Adjustment transport function calculates the adjustment transfer function values X that module 31 calculates this first image S, target range computing module 32 to calculate under current state projection lens module 1 to the projector distance Y of this object M according to this adjustment transfer function values X, and this projector distance Y is sent to comparison module 33, comparison module 33 compares this projector distance Y and this first predeterminable range.In practical application, can select the first standard point, select the second standard point on bar code scanner 001 respectively in first scope of this object M, the distance of this first standard point and this second standard point is this projector distance Y.
Tip element 4, couples control module 3, in order to the steering order of reception control unit 3; When comparison module 33 judges this projector distance Y and this first predeterminable range is unequal or this projector distance Y and this first predeterminable range differ by more than a predetermined value, then control module 3 sending controling instruction sends information warning to Tip element 4 to make Tip element 4, when user obtains this information warning, this projector distance Y can be adjusted in time, as moved forward or backward relative to this object M by bar code scanner 001; Judge that this projector distance Y or this projector distance Y equal with this first predeterminable range differs with this first predeterminable range when comparison module 33 and be less than or equal to this predetermined value, then sending controling instruction is not to Tip element 4 for control module 3, and Tip element 4 does not send information warning; In the present embodiment, Tip element 4 is light-emitting device, and control module 4 can control this light-emitting device to be continued to light or glimmer to realize prompt facility.Alternative, Tip element 4 is for loudspeaker arrangement is with the information of sounding, or vibrating device is to produce vibration, also can be the device that other have prompting function.
In use procedure, when this projection ray L is projected on this object M, by observing the position of this projection ray L relative to this first scope of this object M to determine whether bar code scanner 001 is roughly positioned on correct scanning position, when Tip element 4 sends information warning, the position of adjustable projection ray L this first scope relative, for example, when relative this object M of bar code scanner 001 is positioned at primary importance, projection lens module 1 projects projection ray L1 to this object M and produces light signal N1, image procossing module 2 senses this light signal N1 and forms the first image S1 according to this light signal N1, control module 3 calculates the adjustment transfer function values X1 of this first image S1, and calculate projector distance Y1 by this adjustment transfer function values X1, judge whether this projector distance Y1 conforms to this first predeterminable range, if this projector distance Y1 conforms to this first predeterminable range, bar code scanner 001 this object relative M is positioned at correct scanning position, if this projector distance Y1 does not conform to this first predeterminable range, control module 3 controls Tip element 4 and sends information warning, user can adjust the position of relative this object M of bar code scanner 001 in time according to information warning, user is by observing the position of this projection ray L relative to this first scope of this object M, adjust relative this object M of bar code scanner 001 to the second place, now, projection lens module 1 continues projection projection ray L2 and produces light signal N2 to this object M, image procossing module 2 senses this light signal N2 and forms the first image S2 according to this light signal N2, control module 3 calculates the adjustment transfer function values X2 of this first image S2, and calculate projector distance Y2 by this adjustment transfer function values X2, judge whether this projector distance Y2 conforms to this first predeterminable range, if this projector distance Y2 conforms to this first predeterminable range, bar code scanner 001 this object relative M adjusted is to correct scanning position, if this projector distance Y2 does not conform to this first predeterminable range, control module 3 controls Tip element 4 to be continued to send information warning, user can continue the action performing adjustment.Whereby, by receiving throw light L to form the first image S, obtain the modulating transfer function value X of this first image S to judge whether to be positioned at correct scanning position, thus provide information warning and whether be positioned at correct scanning position to allow user learn fast, and adjust scanning position in time according to information warning.When actual needs, also change this projector distance Y by adjustment aim thing.
With reference to shown in Fig. 5 and Fig. 6, disclose the schematic flow sheet that the present invention scans the first embodiment of assisted location method, scanning assisted location method 003 is for the scanning aided positioning system 002 of above-described embodiment.See Fig. 5, scanning assisted location method 003 comprises the following steps:
Step 100, projection projection ray L is to object M and catch the light signal N of this object M, performs step 101;
Step 101, forms the first image S according to this light signal N, performs step 102;
Step 102, obtains the modulating transfer function value X of this first image S and judges whether this adjustment transfer function values X conforms to the first preset value, then performs step 103 if not, if repeated execution of steps 102; And
Step 103, sends information warning.
Further, this first preset value is the first predeterminable range, see Fig. 6, step 102 is: obtain this adjustment transfer function values X of this first image S and calculate projector distance Y according to this adjustment transfer function values X, judge whether this projector distance Y conforms to this first predeterminable range, then perform step 103 if not, if repeated execution of steps 102.
In the present embodiment, when sending information warning, scanning assisted location method 003 also comprises step 104: the position according to relative this object M of this projection ray L adjusts this projector distance Y, whereby, by receiving throw light to form the first image, obtain this first image modulation transfer function values to judge whether to be positioned at correct scanning position, thus whether accurately and make and adjusting timely scanning position, improves the convenience of system application greatly to allow user know in real time to provide warning.
The present invention is described by above-mentioned related embodiment, but above-described embodiment is only enforcement example of the present invention.Must it is noted that the embodiment disclosed limit the scope of the invention.On the contrary, change done without departing from the spirit and scope of the present invention and retouching, all belong to scope of patent protection of the present invention.
Claims (10)
1. scan an aided positioning system, it is characterized in that, comprising:
Projection lens module, projection projection ray is to object and catch the light signal of this object;
Image procossing module, to arranging by projection lens module, this image procossing module is in order to sense this light signal;
Control module, couples this image procossing module; And
Tip element, couples this control module;
Wherein, this image procossing module forms the first image according to this light signal; This control module obtains the modulating transfer function value of this first image and judges whether this modulating transfer function value conforms to the first preset value, if this modulating transfer function value does not conform to this first preset value, then this control module controls this Tip element and sends information warning.
2. scan aided positioning system as claimed in claim 1, it is characterized in that, this projection lens module projects this projection ray and also reflects to form this light signal to this object.
3. scan aided positioning system as claimed in claim 1, it is characterized in that, this image procossing module has image sensor, and this image sensor is to arranging by projection lens module, and this image sensor is in order to sense this light signal.
4. scan aided positioning system as claimed in claim 1, it is characterized in that, this first preset value has the first predeterminable range; This control module obtains the projector distance of this projection lens module to this object according to this modulating transfer function value; If this projector distance does not conform to this first predeterminable range, then this control module controls this Tip element and sends this information warning, and this information warning adjusts this projector distance in order to point out user.
5. scan aided positioning system as claimed in claim 1, it is characterized in that, this Tip element is light-emitting device, loudspeaker arrangement or vibrating device.
6. scan aided positioning system as claimed in claim 1, it is characterized in that, if this modulating transfer function value conforms to this first preset value, then this Tip element does not send this information warning.
7. scan aided positioning system as claimed in claim 1, it is characterized in that, also comprise storage unit, couple this control module, this first preset value is stored in this storage unit.
8. a bar code scanner, is characterized in that, comprise main part and the scanning aided positioning system described in claim 1-7 any one, this scanning aided positioning system is arranged at this main part.
9. scan an assisted location method, it is characterized in that, comprise step:
Projection projection ray is to object and catch the light signal of this object;
The first image is formed according to this light signal; And
Obtain the modulating transfer function value of this first image and judge whether to send information warning according to this modulating transfer function value and the first preset value.
10. scan aided positioning system as claimed in claim 9, it is characterized in that, this first preset value is the first predeterminable range, wherein, judge whether that the step sending information warning is for obtain projector distance according to this modulating transfer function value according to this modulating transfer function value and this first preset value, if this projector distance does not conform to this first predeterminable range, then send this information warning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510884044.XA CN105469092A (en) | 2015-12-04 | 2015-12-04 | Scanning assistance positioning system, bar code scanning device, and scanning assistance positioning method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510884044.XA CN105469092A (en) | 2015-12-04 | 2015-12-04 | Scanning assistance positioning system, bar code scanning device, and scanning assistance positioning method |
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| CN105469092A true CN105469092A (en) | 2016-04-06 |
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| CN201510884044.XA Withdrawn CN105469092A (en) | 2015-12-04 | 2015-12-04 | Scanning assistance positioning system, bar code scanning device, and scanning assistance positioning method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105956510A (en) * | 2016-04-29 | 2016-09-21 | 苏州佳世达光电有限公司 | Bar code processing method and bar code scanning device |
| CN106682558A (en) * | 2017-03-02 | 2017-05-17 | 苏州摩比力特电子科技有限公司 | Laser range finding type barcode scanning device and method |
| CN106791745A (en) * | 2016-12-16 | 2017-05-31 | 明基电通有限公司 | A kind of projector's Intelligent Installation accessory system and method |
| CN109615360A (en) * | 2018-09-29 | 2019-04-12 | 阿里巴巴集团控股有限公司 | A kind of encoding of graphs methods of exhibiting and device |
| CN111325045A (en) * | 2020-03-20 | 2020-06-23 | 福州符号信息科技有限公司 | Bar code positioning system and bar code positioning method for scanner |
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| EP1764743A2 (en) * | 2005-09-16 | 2007-03-21 | Ricoh Company, Ltd. | Image display device, image display method, computer program product, and image display system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105956510A (en) * | 2016-04-29 | 2016-09-21 | 苏州佳世达光电有限公司 | Bar code processing method and bar code scanning device |
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| CN106791745A (en) * | 2016-12-16 | 2017-05-31 | 明基电通有限公司 | A kind of projector's Intelligent Installation accessory system and method |
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| CN109615360A (en) * | 2018-09-29 | 2019-04-12 | 阿里巴巴集团控股有限公司 | A kind of encoding of graphs methods of exhibiting and device |
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