CN109902242A - A kind of picture storage method in two dimensional code - Google Patents
A kind of picture storage method in two dimensional code Download PDFInfo
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- CN109902242A CN109902242A CN201910151332.2A CN201910151332A CN109902242A CN 109902242 A CN109902242 A CN 109902242A CN 201910151332 A CN201910151332 A CN 201910151332A CN 109902242 A CN109902242 A CN 109902242A
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- dimensional code
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Abstract
A kind of picture storage method in two dimensional code includes the following steps: to obtain image data and two dimensional code parameter, determines length critical value based on two dimensional code parameter；After image data is converted and encoded, data length and length critical value relationship after transform coding are judged；Length critical value is compressed and/or adjusted to picture based on judgement relationship, the clearest picture that this method can store guarantees that picture can be stored in two dimensional code.Picture storage mode can solve the storage of the multi-form mixed information containing picture, can also accelerate picture storage speed under the premise of guaranteeing picture perfection deposit two dimensional code.
Description
Technical field
The present invention relates to computer application fields, are related to planar bar code technology, and in particular to the picture in a kind of two dimensional code is deposited
Method for storing.
Background technique
With the development of society, two dimensional code identification, payment technology fast development, become side important in people's life
Formula.Two dimensional code is the chequered with black and white square of the plane distribution with specific set figure according to certain rule in the two-dimensional direction
Shape square matrix records the barcode technology of new generation of data symbol information, usually saying by two dimensional code battle array and two dimensional code number and lower section
The features such as plaintext word composition, has and contain much information, and error correcting capability is strong, and recognition speed is fast, comprehensive recognition, application field is wide
It is general.
URL is uniform resource locator, one kind of position and access method to the resource that can be obtained from internet
Succinct expression is the address of standard resource on internet.Each file on internet has a unique URL, it is wrapped
The information contained points out how the position of file and browser should handle it.Time complexity refers to an algorithm degree
Taken time grade is completed in operation.Constant rank is that most fastly, index rank is most slow.
In the prior art, due to the limitation of two dimensional code capacity, such as QR code, it can not store and clearly scheme relatively
Piece.So general existing technology is the URL by storing in two dimensional code to obtain picture.Or there are some a small number of feelings
Under condition, by way of limiting picture size, to guarantee that picture is possibly stored in two dimensional code, picture space is also either reserved
Picture is inserted into, but this mode needs big memory capacity, the size of picture is unable to control, waste of resource.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide the picture storage methods in a kind of two dimensional code, should
The clearest picture that method can store guarantees that picture can be stored in two dimensional code, and picture storage mode can solve containing picture
Multi-form mixed information storage, can also guarantee picture perfection deposit two dimensional code under the premise of, accelerate picture storage speed
Degree.
The present invention provides the picture storage methods in a kind of two dimensional code, include the following steps:
S1. image data and two dimensional code parameter are obtained, length critical value is determined based on two dimensional code parameter；
S2. after image data being converted and encoded, judge data length and length critical value relationship after transform coding；
S3. length critical value is compressed and/or adjusted to picture based on judgement relationship.
Further, two dimensional code parameter includes two dimensional code capacity and/or fault-tolerant coefficient.
Further, length critical value is the one third or so of two dimensional code residual capacity.
Further, two dimensional code residual capacity subtracts word segment code length and other for two dimensional code total capacity and must join
Capacity after the occupied capacity of number.
It further, is specially that image data is converted into character string by image data conversion in the step S2.
Further, character string is the form of number and monogram.
It further, is specially that character string is converted into binary coding by image data coding in the step S2.
Further, judge relationship for size relation in the step S2.
Further, if data length is greater than length critical value, return step S2 after compressing to picture.
Further, the boil down to equal proportion compression.
Further, the step S3 further includes coded data fault-tolerant processing, is finally encoded.
Further, the coded data is the coded data after image data and other Data Integrations.
Further, the coding form is binary coding.
Further, the step S3 further includes judging whether the final data for meeting fault-tolerant condition can be stored in two dimension
Code, is to generate two dimensional code；Otherwise return step S2 after adjustment length critical value.
Further, length or fixed coefficient of the adjustment length critical value based on final data beyond two dimensional code capacity are true
It is fixed.
The present invention provides the picture storage methods in a kind of two dimensional code, may be implemented:
(1) in order to improve the speed in picture deposit two dimensional code, length critical value is devised, is reduced by this critical value
Time-consuming operation, to improve efficiency.
(2) critical value designed, also the storage for text picture mixed form data provides a kind of scheme.
(3) in order to guarantee that picture can be all put into two dimensional code, it is also provided with a circulation, if two corresponding to picture
Hex value is too long, has been more than the capacity of two dimensional code.So need to reset length critical value, cycle calculations.This circulation is forced
The mode of nearly result, it is ensured that the picture being calculated is the clearest picture that its two dimensional code may store.
(4) picture storage mode of the invention can solve the storage of the multi-form mixed information containing picture, can also be
Under the premise of guaranteeing picture perfection deposit two dimensional code, accelerate picture storage speed.
Detailed description of the invention
Fig. 1 is the picture Stored Procedure figure in two dimensional code.
Specific embodiment
The following detailed description of specific implementation of the invention, it is necessary to it is indicated herein to be, implement to be only intended to this hair below
Bright further explanation, should not be understood as limiting the scope of the invention, and field person skilled in the art is according to above-mentioned
Some nonessential modifications and adaptations that summary of the invention makes the present invention, still fall within protection scope of the present invention.
The present invention provides the picture storage method in a kind of two dimensional code, detailed process is as shown in Figure 1.
In order to improve the speed in picture deposit two dimensional code, length critical value is devised, is reduced and is consumed by this critical value
When operate, to improve efficiency.
Critical value in certain the design, also the storage for text picture mixed form data provides a kind of scheme.
In order to guarantee that picture can be all put into two dimensional code, be also provided with a circulation, if corresponding to picture two into
System value is too long, has been more than the capacity of two dimensional code.So need to reset length critical value, cycle calculations.This cyclic approximation
As a result mode, it is ensured that the picture being calculated is the clearest picture that its two dimensional code may store.
In the following, further illustrating the process of the picture storage method in two dimensional code of the invention comprising following step:
1. obtaining image data and two dimensional code parameter
Picture type can be JPEG, TIFF, RAW, BMP, GIF, PNG etc.；
The type of two dimensional code can be the figure of depth dot matrix composition；
Two dimensional code parameter includes two dimensional code capacity and/or fault-tolerant parameter.
Length critical value is obtained 2. calculating；
The effect that above-mentioned length critical value is arranged is in order to accelerate speed, in specific application, due to depositing for critical value
So not needing to carry out fault-tolerant calculation every time after picture processing.Because tolerant fail algorithm is very time-consuming algorithm,
If constantly needing to carry out fault-tolerant calculation, not only low efficiency, and the time is long, its time complexity is exponential other.
Initial length critical value is mainly determined according to two dimensional code residual capacity.General initial length critical value is surplus for two dimensional code
The one third or so of covolume amount.Certainly, initial length critical value can also be determined according to other influences parameter, such as fault-tolerant calculation
Method and fault-tolerant coefficient etc..
Above-mentioned two dimensional code residual capacity, generally referred to as two dimensional code total capacity subtract word segment code length and other one
The occupied capacity of a little required arguments.So this method be support containing picture can binary system conversion all types of mixing letter
The encryption of breath.
3. image data is converted to character string forms；
Aforesaid way can be the method that all picture types are converted to number and monogram, and said combination is most typical
For base64.
4. character string is converted to binary coding；
Here character code process can be also possible to disclosed coding schedule such as by the coding schedule oneself defined
ASCII；
5. judging the size of binary length and critical value；If binary length is greater than critical value size, picture
It is compressed, returns third step；If binary length is less than or equal to critical value, into next step；
In order to guarantee the ratio of picture, above-mentioned related picture compression method is mainly picture level specific pressure contracting method.
6. binary coding carries out fault-tolerant calculation；
Above-mentioned binary coding is the binary coding that after image data and other Data Integrations, will be converted to；
It needs exist for calculating by tolerant fail algorithm, most common tolerant fail algorithm is Reed Solomon.Fault-tolerant parameter is general
Less than 40%.Certain fault-tolerant parameter can also be determined according to the capacity of different two dimensional codes and the data capacity of required encryption.
7. judging whether final data can be stored in two dimensional code；If it is not possible, returning to second step, optimization length is critical
Value；
If you need to return to second step, the optimization method of length critical value can be according to the exceeded two dimensional code capacity of final data
Length determine.
8. generating two dimensional code；
Theoretically it may be said that the capacity of two dimensional code determines that the clarity of picture, the present invention utilize the two dimensional code of high capacity,
The picture of high-resolution can be supported to store.
By the critical value setting before processing, the coding rate of picture can be accelerated, improved efficiency；Critical value is set
Meter also solves the data storage of picture character mixed information form in two dimensional code；The method of loop parameter setting, ensure that figure
Piece can store into two dimensional code, and the picture clearest picture that two dimensional code may store thus.
Although for illustrative purposes, it has been described that exemplary embodiments of the present invention, those skilled in the art
Member it will be understood that, can be in form and details in the case where the scope and spirit for not departing from invention disclosed in appended claims
On the change that carry out various modifications, add and replace etc., and all these changes all should belong to appended claims of the present invention
Protection scope, and each step in the claimed each department of product and method, can in any combination
Form is combined.Therefore, to disclosed in this invention the description of embodiment be not intended to limit the scope of the invention,
But for describing the present invention.Correspondingly, the scope of the present invention is not limited by embodiment of above, but by claim or
Its equivalent is defined.
Claims (12)
1. the picture storage method in a kind of two dimensional code, which comprises the steps of:
S1. image data and two dimensional code parameter are obtained, length critical value is determined based on two dimensional code parameter；
S2. after image data being converted and encoded, judge data length and length critical value relationship after transform coding；
S3. length critical value is compressed and/or adjusted to picture based on judgement relationship.
2. storage method as described in claim 1, it is characterised in that: two dimensional code parameter includes two dimensional code capacity and/or fault-tolerant
Parameter.
3. storage method as claimed in claim 2, it is characterised in that: length critical value be two dimensional code residual capacity three/
One or so.
4. storage method as claimed in claim 2 or claim 3, it is characterised in that: two dimensional code residual capacity is that two dimensional code total capacity subtracts
Capacity after removing word segment code length and the occupied capacity of other required arguments.
5. storage method as described in claim 1, it is characterised in that: image data conversion refers to picture in the step S2
Data are converted to character string.
6. storage method as claimed in claim 1 or 5, it is characterised in that: encode image data specifically in the step S2
For character string is converted to binary coding.
7. storage method as claimed in claim 6, it is characterised in that: if data length is greater than length critical value, to picture
Return step S2 after being compressed.
8. storage method as claimed in claim 7, it is characterised in that: the boil down to equal proportion compression.
9. such as claim 1-3,5-6, storage method described in any one of 7-8, it is characterised in that: the step S3 further includes
Coded data fault-tolerant processing, is finally encoded.
10. storage method as claimed in claim 9, it is characterised in that: the coded data is image data and other data
Coded data after integration.
11. storage method as described in claim 1, it is characterised in that: the step S3 further includes that judgement meets fault-tolerant condition
Final data whether can be stored in two dimensional code, be to generate two dimensional code；Otherwise return step S2 after adjustment length critical value.
12. storage method as claimed in claim 11, it is characterised in that: adjustment length critical value is based on final data and exceeds two
The length or fixed coefficient for tieing up code capacity determine.
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| CN201910151332.2A CN109902242B (en) | 2019-02-28 | 2019-02-28 | Picture storage method in two-dimensional code |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110610218A (en) * | 2019-08-09 | 2019-12-24 | 浙江万里学院 | Portrait image two-dimensional code generation method |
| CN111625166A (en) * | 2020-05-21 | 2020-09-04 | 维沃移动通信有限公司 | Picture display method and device |
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| CN107545289A (en) * | 2017-09-19 | 2018-01-05 | 闫河 | The coding method of matrix two-dimensional code and coding/decoding method |
| CN107807973A (en) * | 2017-10-20 | 2018-03-16 | 国云科技股份有限公司 | A kind of method for being embedded into picture according to URL addresses generation Quick Response Code |
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Patent Citations (5)
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| CN202694340U (en) * | 2012-07-20 | 2013-01-23 | 江苏缨思贝睿物联网科技有限公司 | Data transmission system |
| CN103532564A (en) * | 2013-05-27 | 2014-01-22 | Tcl集团股份有限公司 | Two-dimensional code data encoding method, decoding method, system and intelligent device |
| CN103731589A (en) * | 2013-12-20 | 2014-04-16 | 南威软件股份有限公司 | Method for transmitting large data flow through two-dimension code |
| CN107545289A (en) * | 2017-09-19 | 2018-01-05 | 闫河 | The coding method of matrix two-dimensional code and coding/decoding method |
| CN107807973A (en) * | 2017-10-20 | 2018-03-16 | 国云科技股份有限公司 | A kind of method for being embedded into picture according to URL addresses generation Quick Response Code |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110610218A (en) * | 2019-08-09 | 2019-12-24 | 浙江万里学院 | Portrait image two-dimensional code generation method |
| CN110610218B (en) * | 2019-08-09 | 2022-09-13 | 浙江万里学院 | Portrait image two-dimensional code generation method |
| CN111625166A (en) * | 2020-05-21 | 2020-09-04 | 维沃移动通信有限公司 | Picture display method and device |
| CN111625166B (en) * | 2020-05-21 | 2021-11-30 | 维沃移动通信有限公司 | Picture display method and device |
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