CN107392282B - Method and system for manufacturing wear bar code - Google Patents
Method and system for manufacturing wear bar code Download PDFInfo
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- CN107392282B CN107392282B CN201710536773.5A CN201710536773A CN107392282B CN 107392282 B CN107392282 B CN 107392282B CN 201710536773 A CN201710536773 A CN 201710536773A CN 107392282 B CN107392282 B CN 107392282B
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000005299 abrasion Methods 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims description 7
- 238000007781 pre-processing Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 10
- 239000004793 Polystyrene Substances 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
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- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
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Abstract
The invention discloses a method and a system for manufacturing a wear bar code, which comprises the following steps: acquiring a bar code image, preprocessing the bar code image, and positioning the bar code image and a source bar code symbol; generating a rectangular bearing plate by taking the width and the height of the bar code image as thresholds; setting a wear parameter, the wear parameter comprising a noise ratio; calculating the number of noise points according to the width of the bar code symbol, the height of the bar code symbol and the noise ratio; generating a prime number list, and calculating the coordinate value of a noise point according to the width of the bar code symbol, the height of the bar code symbol and the number of noises; setting pixels corresponding to the source bar code symbols as grey according to the coordinate points of the noise points so as to generate worn bar code symbols; and outputting the abrasion bar code symbol to the rectangular bearing plate to form an abrasion bar code image. Wear bar codes with different parameters can be manufactured quantitatively by adopting the method; any number of wear barcodes of the same gauge can be reproducibly produced.
Description
Technical Field
The invention relates to the technical field of image processing, in particular to a method and a system for manufacturing a wear bar code.
Background
In industries such as automatic identification, one-dimensional codes or two-dimensional codes are generally used as information transmission media. The one-dimensional code or the two-dimensional code is identified and read by using a handheld scanner, a bar code identifying and reading engine, a data acquisition device with a bar code identifying and reading function, a fixed bar code scanner or an industrial bar code scanner and other equipment. The test and debugging are needed for many times in the processes of bar code reading equipment research and development, production test and test before purchase. In order to perform the error correction capability test, a worn low-quality bar code needs to be used for the test.
Traditionally, the wear low-quality bar code is mainly manufactured into a trapezoid low-quality bar code by using image processing software such as PS (polystyrene). The collection of wear-type low-quality barcodes in this way mainly has the following drawbacks: (1) making wear bar codes by PS is difficult; (2) the wear bar code obtained by the PS method has the problems that the parameters cannot be quantified and cannot be copied after being consumed, so that the test result cannot be quantified or compared.
Disclosure of Invention
The invention aims to provide a method and a system for conveniently and flexibly manufacturing a wear bar code, and solves the problem that the existing low-quality bar code cannot be quantified and cannot be copied after being consumed, so that the test result cannot be quantified or compared.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for manufacturing a wear bar code comprises the following steps:
the method comprises the steps of firstly, obtaining a bar code image, wherein a source bar code symbol is borne on the bar code image; obtaining a bar code image parameter value and a source bar code symbol parameter value on the bar code image, wherein the bar code image parameter value comprises a bar code image width and a bar code image height, and the source bar code symbol parameter value comprises a boundary point coordinate, a bar code symbol width w and a bar code symbol height h;
secondly, generating a rectangular bearing plate by taking the width and the height of the bar code image as thresholds;
setting a wear parameter, wherein the wear parameter comprises a noise ratio r;
fourthly, calculating the number n of noise points as w x h r according to the width w of the bar code symbol, the height h of the bar code symbol and the noise ratio r;
fifthly, generating a prime number list L {2, 3, 5, 7, 11, 13 … … }, calculating a position coordinate point (x, y) of a first noise point according to the width w of the bar code symbol, the height h of the bar code symbol and the number n of the noise, wherein the x coordinate value is a value obtained by adding the first prime number to the width w of the bar code symbol, the y coordinate value is a value obtained by adding the next prime number to the height h of the bar code symbol, and the like, so as to obtain coordinate points of all the noise points;
sixthly, setting pixels of the positions corresponding to the coordinate points of the source bar code symbol and the noisy point as grey according to the coordinate points of all the noisy points to generate a worn bar code symbol;
and seventhly, outputting the abrasion bar code symbol to the rectangular bearing plate to form an abrasion bar code image.
Preferably, a binarization process is performed after the first action, and the binarization process includes comparing the gray value of each pixel point on the barcode image with 128, wherein the pixel points with the gray value larger than 128 are turned into white, and the pixel points with the gray value smaller than 128 are turned into black.
Preferably, the method further comprises an action eight of displaying the rectangular bearing plate carrying the worn bar code symbol, wherein the displaying comprises printing displaying and screen displaying.
The invention also discloses a system for manufacturing the wear bar code, which comprises the following components:
a processor adapted to implement instructions; and
a storage device adapted to store a plurality of instructions for loading and executing by a processor:
the method comprises the steps of firstly, obtaining a bar code image, wherein a source bar code symbol is borne on the bar code image; obtaining a bar code image parameter value and a source bar code symbol parameter value on the bar code image, wherein the bar code image parameter value comprises a bar code image width and a bar code image height, and the source bar code symbol parameter value comprises a boundary point coordinate, a bar code symbol width w and a bar code symbol height h;
secondly, generating a rectangular bearing plate by taking the width and the height of the bar code image as thresholds;
setting a wear parameter, wherein the wear parameter comprises a noise ratio r;
fourthly, calculating the number n of noise points as w x h r according to the width w of the bar code symbol, the height h of the bar code symbol and the noise ratio r;
fifthly, generating a prime number list L {2, 3, 5, 7, 11, 13 … … }, calculating a position coordinate point (x, y) of a first noise point according to the width w of the bar code symbol, the height h of the bar code symbol and the number n of the noise, wherein the x coordinate value is a value obtained by adding the first prime number to the width w of the bar code symbol, the y coordinate value is a value obtained by adding the next prime number to the height h of the bar code symbol, and the like, so as to obtain coordinate points of all the noise points;
sixthly, setting pixels of the positions corresponding to the coordinate points of the source bar code symbol and the noisy points as grey according to the coordinate points of all the noisy points to generate a worn bar code symbol;
and seventhly, outputting the abrasion bar code symbol to the rectangular bearing plate to form an abrasion bar code image.
The invention has the beneficial effects that:
firstly, wear bar codes with different parameters can be manufactured quantitatively by the method;
secondly, manufacturing any number of abrasion bar codes with the same specification repeatedly by the method;
the wear bar code manufactured by the method can be displayed on different bar code media to form a paper bar code and a screen bar code for different test occasions;
and fourthly, the manufacturing method has high flexibility and can manufacture the wear bar codes with different resolutions.
Drawings
FIG. 1 is a flow chart of a method of making a wear bar code of the present invention;
FIG. 2 is a schematic view of a source bar code symbol of the present invention;
FIG. 3 is a schematic view of a worn bar code symbol according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.
The invention discloses a method for manufacturing a wear bar code, which is suitable for the industry of automatically identifying bar codes and other industries using one-dimensional bar codes or two-dimensional bar codes as information transfer media. The wear bar code manufactured by the method can be used for testing bar code reading equipment, including one-dimensional or two-dimensional hand-held scanners, fixed universal scanners, industrial bar code scanners, reading engines, terminal equipment with a bar code identification function and the like, and as shown in figure 1, the method comprises the following steps:
the method comprises the steps of firstly, obtaining a bar code image, wherein a source bar code symbol is borne on the bar code image; obtaining a bar code image parameter value and a source bar code symbol parameter value on the bar code image, wherein the bar code image parameter value comprises a bar code image width and a bar code image height, and the source bar code symbol parameter value comprises a boundary point coordinate, a bar code symbol width w and a bar code symbol height h;
the acquired bar code image can be used for extracting a picture carrying a one-dimensional bar code or a two-dimensional bar code from an existing bar code database, or acquiring a bar code image in a scanning mode, or acquiring a standard bar code image in a photographing mode, or generating a required bar code image through bar code generating software, wherein the one-dimensional bar code or the two-dimensional bar code carried on the bar code image is a source bar code symbol, and the acquired bar code image is stored on a storage medium and is convenient to recycle. The bar code image carrying the one-dimensional bar code or the two-dimensional bar code adopts a bmp format or other formats and the like. Wherein the one-dimensional barcode may include Code39, Code93, Code128, Codabar, EAN-13, EAN-8, UPC-A, ISBN-13, GS1-128, ITF-14, etc., and the two-dimensional barcode may include PDF417, QR, Data Matrix, Grid Matrix, hanxin, etc.
After the barcode image is obtained, binarization processing can be performed on the barcode image, wherein the binarization processing comprises the step of comparing the gray value of each pixel point on the barcode image with 128, the pixel points with the gray value larger than 128 are converted into white, and the pixel points with the gray value smaller than 128 are converted into black. Specifically, the whole bar code image is scanned, and a gray formula is utilized: and (3) calculating the gray value of each pixel point on each barcode image at gray of 0.2126 × r +0.7152 × g +0.0722 × b, comparing the gray value with the gray value of 128, assigning the pixel point with the gray value being more than 128 to be 255, and assigning the pixel point with the gray value being less than 128 to be 0.
The bar code image obtained by the method is regular, irrelevant information is removed, and a simple method can be adopted to position the source bar code symbol to obtain the parameter value of the source bar code symbol. Specifically, the whole image is scanned, and each black pixel point is judged to appear, wherein the vertical coordinate of the black pixel point is the lower boundary when the vertical coordinate is the minimum, the vertical coordinate of the black pixel point is the upper boundary when the vertical coordinate is the maximum, the horizontal coordinate of the black pixel point is the left boundary when the horizontal coordinate is the minimum, and the horizontal coordinate of the black pixel point is the right boundary when the. The boundary coordinates of the source barcode symbol are thus marked, which include the lower left corner (bcleft, bcbottom), the lower right corner (bcright, bcbottom), the upper left corner (bcleft, bctop), and the upper right corner (bcright, bctop) of the source barcode symbol. And obtaining the width w and the height h of the source bar code symbol according to the boundary coordinates. And simultaneously acquiring the width and the height of the bar code image.
Secondly, generating a rectangular bearing plate by taking the width and the height of the bar code image as thresholds;
in this step, the formed rectangular bearing plate is used for bearing the worn bar code symbol, and a rectangular bearing plate needs to be generated according to the bar code image width and the bar code image height as parameters, so that the rectangular bearing plate can bear the worn bar code symbol. The rectangular bearing plate adopts a bmp image with a white background, and the rectangular bearing plate can also adopt other background colors according to the use requirement.
Setting a wear parameter, wherein the wear parameter comprises a noise ratio r;
in this step, the noise ratio r is a percentage of the number of noise pixels to the number of source barcode symbol pixels, and the percentage may be between 0% and 100%, such as 30%, 40%, 50%, 46%, 78%, 80%, 90%, 99%, 48.9%, 52.3%, etc., and different percentages form different degrees of wear. For example, when the percentage is 30%, an image of 100 pixels is represented, and 30 points are set as noise points in gray.
Fourthly, calculating the number n of noise points as w x h r according to the width w of the bar code symbol, the height h of the bar code symbol and the noise ratio r;
in this step, the calculation method of the number of the noise points is to multiply the product of the symbol width of the source barcode and the symbol height of the source barcode by the noise ratio, and then the number of the noise points is obtained.
Fifthly, generating a prime number list L {2, 3, 5, 7, 11, 13 … … }, calculating a position coordinate point (x, y) of a first noise point according to the width w of the bar code symbol, the height h of the bar code symbol and the number n of the noise, wherein the x coordinate value is a value obtained by adding the first prime number to the width w of the bar code symbol, the y coordinate value is a value obtained by adding the next prime number to the height h of the bar code symbol, and the like, so as to obtain coordinate points of all the noise points;
in this step, the prime number list is generated as a pseudo random number generator, and the value obtained by subtracting the width w of the bar code symbol and the height w of the bar code symbol is used as the (x, y) coordinate value of the noise point, and the (x, y) coordinate values of all the noise points are obtained one by one.
Sixthly, setting the pixel of each noise point coordinate point corresponding to the source bar code symbol as gray according to the coordinate points of all the noise points to generate a worn bar code symbol;
and seventhly, outputting the abrasion bar code symbol to the rectangular bearing plate to form an abrasion bar code image. And after the abrasion bar code symbol is output to the rectangular bearing plate to form an abrasion bar code image, the abrasion bar code image can be stored, so that the subsequent use is convenient.
The formed worn barcode image can be printed on different media, which can be different types of paper, metal, plastic or PVC materials, etc. The formed abrasion bar code image can be displayed on a screen medium, the screen medium can be a screen of a computer, a mobile phone, a PDA and other equipment and an electronic ink screen, screens with different resolutions can be adopted, and the screens can be adjusted to be in different brightness, so that the diversity and the comprehensiveness of the picture are increased. When the worn bar code image is printed or displayed, a single worn bar code image can be displayed or a plurality of worn bar code images form a matrix with multiple rows and multiple columns for displaying.
And after the first action, performing binarization processing, wherein the binarization processing comprises the step of comparing the gray value of each pixel point on the barcode image with 128, converting the pixel points with the gray values larger than 128 into white, and converting the pixel points with the gray values smaller than 128 into black.
The invention further discloses a manufacturing system of the wear bar code, and the manufacturing system of the wear bar code is based on all the methods and steps of the manufacturing method of the wear bar code. Specifically, the system comprises:
a processor adapted to implement instructions; and
a storage device adapted to store a plurality of instructions for loading and executing by a processor:
the method comprises the steps of firstly, obtaining a bar code image, wherein a source bar code symbol is borne on the bar code image; obtaining a bar code image parameter value and a source bar code symbol parameter value on the bar code image, wherein the bar code image parameter value comprises a bar code image width and a bar code image height, and the source bar code symbol parameter value comprises a boundary point coordinate, a bar code symbol width w and a bar code symbol height h;
secondly, generating a rectangular bearing plate by taking the width and the height of the bar code image as thresholds;
setting a wear parameter, wherein the wear parameter comprises a noise ratio r;
fourthly, calculating the number n of noise points as w x h r according to the width w of the bar code symbol, the height h of the bar code symbol and the noise ratio r;
fifthly, generating a prime number list L {2, 3, 5, 7, 11, 13 … … }, calculating a position coordinate point (x, y) of a first noise point according to the width w of the bar code symbol, the height h of the bar code symbol and the number n of the noise, wherein the x coordinate value is a value obtained by adding the first prime number to the width w of the bar code symbol, the y coordinate value is a value obtained by adding the next prime number to the height h of the bar code symbol, and the like, so as to obtain coordinate points of all the noise points;
sixthly, setting pixels of the positions corresponding to the coordinate points of the source bar code symbol and the noisy points as grey according to the coordinate points of all the noisy points to generate a worn bar code symbol;
and seventhly, outputting the abrasion bar code symbol to the rectangular bearing plate to form an abrasion bar code image.
The system refers to all methods and steps of the manufacturing method of the wear bar code, and by adopting the method and the system, the wear bar codes with different parameters can be manufactured quantitatively, and any number of wear bar codes with the same specification can be manufactured repeatedly; the manufactured abrasion bar codes can be displayed on different bar code media to form paper bar codes and screen bar codes for different test occasions; the system and the method for manufacturing the wear bar code have high flexibility and can manufacture wear bar codes with different resolutions.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (4)
1. A method for manufacturing a wear bar code is characterized by comprising the following steps:
the method comprises the steps of firstly, obtaining a bar code image, wherein a source bar code symbol is borne on the bar code image; obtaining a bar code image parameter value and a source bar code symbol parameter value on the bar code image, wherein the bar code image parameter value comprises a bar code image width and a bar code image height, and the source bar code symbol parameter value comprises a boundary point coordinate, a bar code symbol width w and a bar code symbol height h;
secondly, generating a rectangular bearing plate by taking the width and the height of the bar code image as thresholds;
setting a wear parameter, wherein the wear parameter comprises a noise ratio r;
fourthly, calculating the number n of noise points as w x h r according to the width w of the bar code symbol, the height h of the bar code symbol and the noise ratio r;
fifthly, generating a prime number list L {2, 3, 5, 7, 11, 13 … … }, calculating a position coordinate point (x, y) of a first noise point according to the width w of the bar code symbol, the height h of the bar code symbol and the number n of the noise, wherein the x coordinate value is a value obtained by adding the first prime number to the width w of the bar code symbol, the y coordinate value is a value obtained by adding the next prime number to the height h of the bar code symbol, and the like, so as to obtain coordinate points of all the noise points;
sixthly, setting pixels of the positions corresponding to the coordinate points of the source bar code symbol and the noisy points as grey according to the coordinate points of all the noisy points to generate a worn bar code symbol;
and seventhly, outputting the abrasion bar code symbol to the rectangular bearing plate to form an abrasion bar code image.
2. The method of making a wear barcode of claim 1, wherein:
and after the first action, performing binarization processing, wherein the binarization processing comprises the step of comparing the gray value of each pixel point on the barcode image with 128, converting the pixel points with the gray values larger than 128 into white, and converting the pixel points with the gray values smaller than 128 into black.
3. The method of making a wear barcode of claim 1, wherein:
the method further comprises an eighth action of displaying the rectangular bearing plate carrying the worn bar code symbol, wherein the displaying comprises printing displaying and screen displaying.
4. A system for producing a wear barcode, comprising:
a processor adapted to implement instructions; and
a storage device adapted to store a plurality of instructions for loading and executing by a processor:
the method comprises the steps of firstly, obtaining a bar code image, wherein a source bar code symbol is borne on the bar code image; obtaining a bar code image parameter value and a source bar code symbol parameter value on the bar code image, wherein the bar code image parameter value comprises a bar code image width and a bar code image height, and the source bar code symbol parameter value comprises a boundary point coordinate, a bar code symbol width w and a bar code symbol height h;
secondly, generating a rectangular bearing plate by taking the width and the height of the bar code image as thresholds;
setting a wear parameter, wherein the wear parameter comprises a noise ratio r;
fourthly, calculating the number n of noise points as w x h r according to the width w of the bar code symbol, the height h of the bar code symbol and the noise ratio r;
fifthly, generating a prime number list L {2, 3, 5, 7, 11, 13 … … }, calculating a position coordinate point (x, y) of a first noise point according to the width w of the bar code symbol, the height h of the bar code symbol and the number n of the noise, wherein the x coordinate value is a value obtained by adding the first prime number to the width w of the bar code symbol, the y coordinate value is a value obtained by adding the next prime number to the height h of the bar code symbol, and the like, so as to obtain coordinate points of all the noise points;
sixthly, setting pixels of the positions corresponding to the coordinate points of the source bar code symbol and the noisy points as grey according to the coordinate points of all the noisy points to generate a worn bar code symbol;
and seventhly, outputting the abrasion bar code symbol to the rectangular bearing plate to form an abrasion bar code image.
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