CN109410201A - A kind of evaluation method of cotton fabric digit printing clarity - Google Patents
A kind of evaluation method of cotton fabric digit printing clarity Download PDFInfo
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Abstract
The invention discloses a kind of evaluation methods of cotton fabric digit printing clarity, including (1) to modulate printing ink, and land, negative line, rectangular, round and grid pattern are printed on silk fabric；(2) image of printing is objectively evaluated using non-reference picture quality appraisement method；(3) complicated image of printing is evaluated using MOS subjective evaluation method.The evaluation method of cotton fabric digit printing clarity involved in the present invention, the evaluation of edge imbibition clarity is carried out to land and negative line using imbibition degree, imbibition clarity inside open-wire line, negative line, rectangular and round progress is evaluated using the sum of grey scale difference absolute value algorithm, subjective assessment is finally carried out to complicated image using single.The present invention has carried out accurate evaluation to the readability of cotton fabric digit printing with for subjective assessment single evaluation method using the method combined with subjective assessment, relatively objective evaluation is objectively evaluated.
Description
Technical field
The present invention relates to commenting for textile printing clarity technical field, especially a kind of cotton fabric digit printing clarity
Valence method.
Background technique
In recent years, as China's science and technology continues to develop, society is constantly progressive, and people are to material progress construction and spirit text
Bright construction made higher requirement.The connection that clothing is lived as the word to stand in the breach in people's clothing, food, lodging and transportion -- basic necessities of life and people
It is very close.And the quality and effect of dress designing are then two aspects that people compare emphasis when selecting clothes, people
Have higher requirement in terms of the two.
Digit printing is a kind of printing technology risen recent years, develops and popularize the especially rapid of growth.It is digital
Stamp not only substantially increases the efficiency of printing and dyeing, but also dyeing and printing products type is made to become more to enrich, and also creates more
Innovative space.Digit printing compensate for Conventional decal production deficiency, personalization, diversification in face of modern textiles market,
The demand of small lot has obtained very big satisfaction, while also affecting the sales mentality and management style of textile industry and rag trade.More
Importantly, digit printing compares Conventional decal more energy-saving and emission-reduction, environmental pollution is not only greatly reduced, and be conducive to
The sustainable development of society.
It is as follows for the influence factor of cotton fabric digit printing:
1, spray head precision
Spray head currently on the market has piezo jets, heat foamable spray head, description spray head, industrial nozzle, and wherein stamp is most
Common spray head is the description spray head and industrial nozzle of piezoelectric type, and piezoelectric type description spray head is with tetra- generation of EPSON head, five generations
Based on head, six generations head, five generations head is main product, and highest resolution 1440dpi, wherein supporting 720dpi, 540dpi is printed
Mode, this is also the most commonly used spray head of current printing machine.For textile printing angle, since the fiber of fabric is thicker,
The resolution ratio of 720dpi or more is difficult to distinguish from visual effect.So in actual textile printing, spray head
Influence of the precision to clarity is very small.
2, mechanical precision
Influence of the mechanical precision in terms of stamp is still very big.The breadth of general printing machine is 1600~2200mm, axis
The length of roller generally will be up to the length of 2200~2800mm.By taking Italian MS guide belt direct-injection printing machine as an example, shaft diameter is
400mm, length 2200mm, the composition errors such as shaft diameter, concentricity, straightness are 0.003mm, the i.e. machine of one perimeter of stamp
Tool error is 0.01mm, and piece such axis of processing is very difficult.If the product diameter error of certain plant produced
0.1mm, then in print procedure, spray head is in the connecting portion of ink-jet twice, and side has been likely to occur intersection, and the other side
But the white line of 0.2mm or so occurs, such product quality is very poor.So the mechanical precision of assembly is inadequate, it is
Influence very much the stamp clarity of digital decorating machine.
3, in terms of ink
Common people think that ink may influence saturation degree, color fastness, the tinctorial yield of color, but in fact, ink to stamp
Precision can also have a great impact.For example, if the fluency of ink is bad, black impurities in water is more, when dyeing it is possible that
The phenomenon that broken string, plug, to make to generate the not upper white point contaminated inside PRINTED FABRIC, to influence the clarity of stamp.
4, fabric construction
Fabric structure is more complicated, and whether surface is smooth, and the density size of fabric, the factors such as lines of fabric are all
It will affect the clarity of digit printing.
The history of Chinese cotton-spinning fabric development be it is very long-range, cotton fabric is former as most important natural fiber clothes
One of material, its main feature is that having excellent snugness of fit, soft, soft glossy rich in nature aesthetic feeling, and has
The features such as strong durable, moisture pick-up properties is strong, and dyeability is good, it is deep to be liked by the majority of consumers.China's textile production at present
Ability accounts for about global half, and along with being continuously increased for piece market, the general trend of clothes and ornament materials is to return
Natural fiber.The production of the especially high-grade personalized cotton products enterprise of cotton industry is also at the stage of gradually rising, so cotton spinning
The status of fabric and its clothing item in the textile industry is particularly significant.
Therefore, cotton fabric digital printing technology is not only the revolutionary break-through skill and clothes individual character of dyeing
The safeguards technique that change, fashion-orientation, single-pieceization are realized.Digit printing has the advantages that it is thorough without making a plate relative to Conventional decal
Original text, the even process flows such as solarization, plate-making are retouched during having abandoned Conventional decal in bottom, so that designer is preferably given free rein to one's imagination, go to create
Make some unique figures created an aesthetic feeling, unique design rule makes it possible apparel art, makes designer and disappears
Expense person's Interaction Design is possibly realized.This has textile wear fashion extraordinary meaning, special especially for having
The dress ornament and textile needed.
So we should more pay close attention to the clarity of textile printing in cotton fabric digit printing.It is how more convenient and quasi-
It is true to textile printing when clarity carry out the cotton that evaluation is problem to be solved by this invention and suitable digit printing
The structure of fabric is also problem according to the present invention.
Summary of the invention
It is more convenient and accurate the object of the present invention is to provide a kind of evaluation method of cotton fabric digit printing clarity
The clarity of the digit printing to cotton fabric evaluate.
In order to solve the above technical problems, the object of the present invention is achieved like this:
A kind of evaluation method of cotton fabric digit printing clarity according to the present invention, including,
(1) printing ink is modulated, land, negative line, and the track grid on cotton fabric are printed on cotton fabric
Figure；In cotton fabric through printing land and negative line to broadwise, line length is not less than 1.27mm；
(2) land of printing, negative line are objectively evaluated using non-reference picture quality appraisement method:
The image of land, negative line is intercepted in electron microscope；
It to the land and negative line with broadwise, is calculated separately according to what electron microscope was intercepted through negative to land, broadwise
Line, through the imbibition degree and the sum of grey scale difference absolute value to land and broadwise negative line, calculate rectangular and circular pattern gray scale difference
Divide the sum of absolute value；
The imbibition degree formula of land are as follows:
The imbibition degree formula of negative line are as follows:
Wherein, Nx, NyThe respectively setting width and print span of land and negative line；Df (x) is imbibition degree, and value is got over
Small, image is more clear；
The formula of the sum of grey scale difference absolute value algorithm is as follows:
Wherein, M, N are respectively the width and height of image；F (x, y) indicates the gray value in image (x, y) point；D (f) is ash
Spend the sum of difference absolute value；
(3) to being printed with the cotton fabric of trellis diagram as test sample, according to contrived experiment come establishment officer, using list
Stimulus method, the multiple test samples of tester's random observation, and be to the sequence of different tester's test samples it is random,
The test sample of tester's observation is given a mark；It average treatment is normalized to the score that tester beats obtains subjectivity and comment
Valence score value, specific calculation formula are as follows:
MOSjExpression is the mean opinion score of j test image to number,Effectively beating after indicating rejecting abnormalities data
Divide number,Indicate effective marking to image；Abnormal data judgement generallys use r distribution and is determined, i.e. observer i
If existing to the marking of image jOutside section, then it is assumed that abnormal
Data, α are confidence level, ujAnd σjFor the mean value and standard deviation of original marking.
As a further illustration of the above scheme, the width of the land and negative line lines is 0.1-1.9mm.
As a further illustration of the above scheme, the digital printing process of the cotton fabric are as follows:
Pad starching (80%-90% pad dyeing rate) → drying (100 DEG C) → ironing fabric (100 DEG C) → digit printing →
Decatize (saturated vapor, 105 DEG C, 10min) → cold water wash → hot water wash → soap (soaping agent 2g/L, 95 DEG C, 10min) → it is cold
Washing → drying；Wherein, the bath raio soaped is 1:50.
The beneficial effects of the present invention are: a kind of evaluation method of cotton fabric digit printing clarity according to the present invention,
The evaluation for carrying out imbibition clarity in edge to land and negative line using imbibition degree, using the sum of grey scale difference absolute value algorithm pair
Open-wire line, negative line carry out internal imbibition clarity and are evaluated, and finally carry out subjective assessment to complicated image using single.
The present invention uses the method combined with subjective assessment that objectively evaluates, relatively objective evaluation and subjective assessment single evaluation method
For, accurate evaluation has been carried out to the readability of cotton fabric digit printing.
Detailed description of the invention
Fig. 1 is six kinds of cotton fabric broadwise land imbibition degree line charts of A, B, C, D, E, F；
Fig. 2 is six kinds of cotton fabrics of A, B, C, D, E, F through to land imbibition degree line chart；
Fig. 3 is that six kinds of cotton fabric broadwise negative line imbibition degree of A, B, C, D, E, F are taken out stitches figure；
Fig. 4 is six kinds of cotton fabrics of A, B, C, D, E, F through to negative line imbibition degree line chart；
Fig. 5 is six kinds of cotton fabric broadwise land SMD value line charts of A, B, C, D, E, F；
Fig. 6 is six kinds of cotton fabrics of A, B, C, D, E, F through to land SMD value line chart；
Fig. 7 is that six kinds of cotton fabric broadwise negative line SMD values of A, B, C, D, E, F are taken out stitches figure；
Fig. 8 is six kinds of cotton fabrics of A, B, C, D, E, F through to negative line SMD value line chart；
Fig. 9 is that six kinds of cotton fabrics of A, B, C, D, E, F are rectangular, round SMD value line chart；
Figure 10 is the Local map of grid pattern printed on six kinds of cotton fabrics of A, B, C, D, E, F.
Figure 11 is relativity scale pattern reciprocal fraction table.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and specific examples.
It elaborates in conjunction with attached drawing to the present invention.A kind of cotton fabric digit printing clarity according to the present invention
Evaluation method, including on cotton fabric printing setting width through the land and negative line and trellis diagram to broadwise.To land,
Negative line is objectively evaluated using non-reference picture quality appraisement method.The cotton fabric of trellis diagram will be printed with as test specimens
This, carries out subjective assessment using single come establishment officer according to contrived experiment.
Printing ink is modulated, land, negative line, and the track trellis diagram on cotton fabric are printed on cotton fabric；?
Cotton fabric through printing land and negative line to broadwise, line length is not less than 1.27mm.
Cotton fabric is broadly divided into three kinds by institutional framework point, plain cloth, twill and satin.Plain weave structure be through
Yarn and weft yarn are interweaved with rule one on the other, i.e., warp and weft is just staggeredly primary every a yarn.So intertwined point between fabric
At most.The characteristics of this cloth, is that quality is strong, very scrapes, surfacing that more frivolous, wearability is good, good permeability, and intensity is high,
Cloth cover is neat and well spaced and front and back sides are identical.Twill structure is that at least to have three warp thread and three weft yarns mutual in a complete organization
Interweave, there can only be a latitude through interlacing point on every warp thread weft yarn.Oblique line is constituted by continuous interlacing point in fabric surface
Road.Twill-weave is by being floated long line or latitude floats the appearance effect that long line constitutes the twill of fabric surface presentation.It is twill
The number of warp and weft interweaving is fewer than plain weave, keeps the hole between warp and weft smaller, and yarn can arrange closeer, thus fabric
Compare fine and close thick and solid.Twills are soft, and elasticity is good, but cloth cover has obvious oblique lines, and wearability, fastness are poor
Satin construction is that a kind of independent interlacing point by adjacent two warp thread or weft yarn is uniformly distributed but not continuous fabric knot
Structure.Independent interlacing point is covered by the long line that floats of two adjacent warp thread or weft yarn in satin tissue, and fabric surface is smoothly even
Whole, soft, rich in gloss or slightly in lines, floral designs are rich in three-dimensional sense.
Six kinds of different structures have been selected in the present invention and more common cotton fabric is as experiment product, by this six kinds
It is evaluated after textile printing and carrys out confirmatory experiment purpose.Fabric used in experimentation is Suzhou new people silk Co., Ltd
It provides.As shown in table 1.
1 tested fabrics of table
There is ink-jet decorating machine used in the present invention parameter to be shown in Table 2, other used instruments are shown in Table 3.
Table 2 tests printing machine used
Other experiment equipments of table 3
In cotton fabric in digit printing, lines and text are as one of most common element.If defective in quality,
The effect of digit printing can be seriously affected, therefore lines and text quality are for reflecting that the clarity of PRINTED FABRIC has weight
Want reference significance.It is ever-changing due to character stroke form, thus this paper will be to discuss based on lines, but acquired results
Also the expansible test and evaluation for being applied to character stroke edge quality.Ink-jet required on cotton fabric is printed in the present invention
The design of brush be each fabric through to broadwise yin-yang lines, the trellis diagram of fabric, fabric square or round figure.Institute's ink-jet
The open-wire line of printing and the width range of negative line are 0.1-1.9mm, take 0.3mm as differential, printing 7.
To the digit printing of cotton fabric the specific process is as follows: padding starching (80%-90% pad dyeing rate) → drying
(100 DEG C) → ironing fabric (100 DEG C) → digit printing → decatize (saturated vapor, 105 DEG C, 10min) → cold water washes → hot water
(soaping agent 2g/L, 95 DEG C, 10min) → cold water is washed → is washed → soaps to dry.It soaps: bath raio 1: 50, soap flakes mass concentration 3g/
L, sodium carbonate 3g/L, 90 DEG C, 10min.
It uses non-reference picture quality appraisement method to objectively evaluate land, the negative line of printing, including uses imbibition
It spends to evaluate the clarity of land negative line edge imbibition, and evaluate land and yin with the sum of grey scale difference absolute value algorithm
The clarity of imbibition inside line.
Ink imbibition is on the fiber to except requiring when edge imbibition refers to printing.Such as when lines setting width compared with
Hour, the amount of ink imbibition to surrounding is larger for former lines, and on the whole edge is fuzzyyer, lines it is clear
It is poorer to spend；Otherwise when the setting width of lines is larger, the amount of ink imbibition to the periphery is smaller relative to former lines, overall
On see that the clarity of pattern is higher.
And internal imbibition, then it is because since, there are intertwined point and hole, meeting after imbibition occurs for internal ink inside figure
It is produced without by spray printing " white point ", " white point " makes internal uneven.Internal imbibition it is more, internal " white point " is fewer, figure
The uniformity of picture is bigger.But more uniform inside image, the easier crosslinking of different color lumps between image, due to us
The color of printing is single black, can not embody the crosslinking phenomena of color lump, but if it is a width color image, inside is seeped
That changes is more, and image is fuzzyyer.
Due to the sum of grey scale difference absolute value value react be image inside imbibition degree, so we can obtain
The value of the sum of gray scale difference absolute value is higher out, and the clarity of image is poorer.
The image of land, negative line is intercepted in electron microscope.According to electron microscope intercepted through to the sun with broadwise
Line and negative line are calculated separately through to land, broadwise negative line, absolute through the imbibition degree and grey scale difference to land and broadwise negative line
The sum of value.The formula for using the imbibition degree of characterization edge imbibition in the present invention is as follows:
The imbibition degree formula of land are as follows:
The imbibition degree formula of negative line are as follows:
Wherein, Nx, NyThe respectively setting width and print span of land and negative line；Df (x) is imbibition degree, and value is got over
Small, image is more clear.
Mapping is treated with amcap software in the case where 10 times of enlargement ratio using USB digit microscope in the present invention
As taking pictures, and the maximum printing width with Measurement software to the image measurement pattern taken pictures.In order to avoid line
There is unstable factor in the position of print span measurement data, and every lines all divide five measured zones, and by 5 regions
The print span averaged as lines of measured value.
The present invention is respectively provided with seven kinds of print spans of 0.1-1.9mm, prints six kinds of fabrics in the yin-yang of radial direction and broadwise
Lines.Wherein land refer to paper it is white on colo(u)r streak (black line), and negative line refers to the white line on color lump.Beating after measurement printing
Print width and the difference that width is arranged are maximum imbibition width of the lines in printing.The result value the big, illustrates left and right two
The imbibition width on side is bigger, then the clarity of the fabric is also poorer.
The imbibition degree of the characterization edge imbibition degree on six kinds of cotton fabrics of A, B, C, D, E, F is shown in Fig. 1 to Fig. 4
Line chart.From the graph as can be seen that due to edge imbibition, either land or negative line, with fabric printing width
Increase, the clarity of fabric is also gradually increased, this rule is the same in lines of direction of warp and weft, this is because with
The increase of line thickness, the specific gravity that the ink imbibition amount at edge accounts for lines itself is gradually reduced, and then clarity gradually increases
Greatly.Wherein candlestick chart line thickness is arranged in 0.7-1.9mm, and the clarity of fabric is higher.
When measurement due to negative line line thickness 0.1-0.4mm, the line thickness that imbibition width is greater than itself leads to stamp
Shi Wufa shows complete black and white line, therefore negative line only measures the imbibition width that 0.7-1.9mm is arranged in line width.
It can also be seen that fabric is through being not monolithic to the articulation curve with broadwise, this is because having in figure
A little fabrics be to broadwise structure it is different, the degree of imbibition also can be variant.Wherein, fabric B, C, F belongs to plain weave knot
Structure, respectively through broadwise structure substantially without difference, so also not without much difference in terms of clarity.Fabric A, D, E difference
It is respectively larger through broadwise architectural difference for satin weave, twill and diversified twill, so also not larger through broadwise poor definition.Work as line
When width is broadwise, fabric clarity is followed successively by A > B > C > D > E > F from high to low.When line thickness is radial, fabric is clear
Clear degree is followed successively by variation E > A > B > C > D > F from high to low.
In the present invention, the formula for characterizing the sum of the grey scale difference absolute value of internal imbibition algorithm is as follows:
Wherein, M, N are respectively the width and height of image；F (x, y) indicates the gray value in image (x, y) point；D (f) is ash
The sum of difference absolute value is spent, it characterizes the average degree of variation of image grayscale, and the average degree of grey scale change is bigger, image
It is more clear；Otherwise the average degree of grey scale change is smaller, and image is fuzzyyer.Therefore the present invention using grey scale difference absolute value it
And algorithm, it can quickly, real-time, effectively measure.
The present invention to include in the sum of the grey scale difference absolute value of internal imbibition readability algorithm to land, negative line into
Row processing also includes square or round processing printed on 6 kinds of cotton fabrics.The sum of grey scale difference absolute value in the present invention
It is indicated using SMD value.Fig. 5 to Fig. 8 show on six kinds of cotton fabrics of A, B, C, D, E, F through to, the land of broadwise, negative line
The line chart of SMD value.
With the increase of lines setting width, the SMD of land major part fabric it can be seen from above figure 5 is into Fig. 8
Value is also gradually increased, this illustrates that the clarity of fabric is gradually decreased as line thickness increases, and is mentioned in this and 3.1.1 above
Arrive with fabric width increase, the clarity of fabric, which is also gradually increased, to be disagreed.In fact, with land line thickness
Increase, the dosage of ink gradually increases, thus cause it is average fewer to internal " white point " occurred, so land lines
Uniformity coefficient it is bigger；And negative line, due to increasing with line thickness, the quantity of ink on surrounding color lump is far longer than generation line
Quantity of ink needed for item, therefore line width influences uniform degree with regard to smaller, so with the increase of negative line line thickness, SMD value
It is basically unchanged
In figure it can also be seen that fabric through to be not with the articulation curve in broadwise it is monolithic, variation be
When line thickness is broadwise, fabric clarity is followed successively by A > B > C > D > E > F from high to low.When line thickness is radial, knit
Object clarity is followed successively by variation E > A > B > C > D > F from high to low.
The present invention is to further including to above cotton fabric in the sum of the grey scale difference absolute value of internal imbibition readability algorithm
Shape and circle.Fig. 9 shows the broken line for rectangular, circular pattern the SMD value printed on six kinds of cotton fabrics of A, B, C, D, E, F
Figure.On six pieces of fabrics rectangular and round obtained SMD value is not much different, it was demonstrated that SMD value has standard on reacting internal imbibition
True property.It can be inferred that the clarity of fabric F is worst from Fig. 9, fabric A, B clarity is best, and fabric C, D, E clarity is placed in the middle.
Using the cotton fabric for being printed with trellis diagram as test sample, the digit printing clarity of cotton fabric is carried out subjective
Evaluation.According to contrived experiment come establishment officer, using single, the multiple test samples of tester's random observation, and to not
With tester's test sample sequence be it is random, tester observation test sample give a mark；Tester is beaten
Score is normalized average treatment and obtains subjective assessment score value, specific calculation formula are as follows:
MOSjExpression is the mean opinion score of j test image to number,Effectively beating after indicating rejecting abnormalities data
Divide number,Indicate effective marking to image；Abnormal data judgement generallys use r distribution and is determined, i.e. observer i
If existing to the marking of image jOutside section, then it is assumed that abnormal
Data, α are confidence level, ujAnd σjFor the mean value and standard deviation of original marking.
In the present invention, be in spacious classroom of becoming clear, select at random 20 male to female ratio 1:1 without the big of colour blindness anomalous trichromatism
Student.Fabric is laid on classroom desk, allows 20 observers successively to observe the multicolour pattern of different fabrics respectively, then
The pattern of clarity different from lane database compares again, selects textile design and database picture readability the most
Close, and corresponding score is obtained referring to relativity scale pattern reciprocal fraction table according to picture number.Score can indicate
The clarity of the pattern, score value is bigger, and the clarity of pattern is higher.Average place is normalized to the score that tester beats
Reason obtains subjective score.Mean opinion score method (Mean Opinion Score, MOS) is used in the present invention.Relativity scale
Pattern reciprocal fraction table is shown in Figure 11.
The Local map of grid pattern printed on six kinds of cotton fabrics of A, B, C, D, E, F is identified in Figure 10.From Figure 10
The trellis diagram of each fabric can be found out from subjective, regardless of the fabric of institutional framework, along the clarity through broadwise stamp
It is higher than the clarity not sternly through broadwise stamp sideling.Wherein most fabric count to clarity difference it is little, fabric
E obviously along high along the clarity of broadwise (vertical) through the clarity ratio to (transverse direction), this and 3.1 in the knot that objectively evaluates
By almost the same, to demonstrate the accuracy of experiment.
The score value that tester according to the present invention is got is calculated further according to the calculation formula of subjective assessment score value
The subjective assessment score value of digital printing is shown in Fig. 4 on six kinds of cotton fabrics of A, B, C, D, E, F out.
4 fabric subjective assessment mean opinion score table of table
| Fabric number | Mean opinion score |
| A | 4.28 |
| B | 4.15 |
| C | 4.06 |
| D | 3.27 |
| E | 2.58 |
| F | 3.39 |
It can go out from table, the descending sequence of the whole clarity of fabric is followed successively by A > B > C > F > D > E.This and it is objective
The conclusion that evaluation method obtains is almost the same.Wherein since fabric F thickness is most thin, color can be clearly felt that from subjective see
It is shallow compared with other five kinds of cloth, in subjective assessment everyone standard difference cause the articulation score error of fabric F compared with
Greatly.Fabric E has apparent oblique lines, and most of observer thinks that its clarity is particularly poor, but this with through objective method number
The conclusion obtained according to analysis is different.Even illustrate objectively statistics indicate that the high fabric of clarity, work as in practical application
In, twill more or less will affect judgement of the people to image definition since fabric lines is excessively obvious.So accurately commenting
Subjective and objective method should be mapped by the clarity of one image of valence, rather than it is single with a certain method into
Row evaluation.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (3)
1. a kind of evaluation method of cotton fabric digit printing clarity, which is characterized in that including,
(1) printing ink is modulated, land, negative line, rectangular and circular pattern are printed on cotton fabric, and print on cotton fabric
Lines trellis diagram；In cotton fabric through printing land and negative line to broadwise, line length is not less than 1.27mm；
(2) land of printing, negative line are objectively evaluated using non-reference picture quality appraisement method:
The image of land, negative line is intercepted in electron microscope；
According to, to the land and negative line with broadwise, being calculated separately of being intercepted of electron microscope through to land, broadwise negative line, warp
To the sum of the imbibition degree and grey scale difference absolute value of land and broadwise negative line, it is absolute to calculate rectangular and circular pattern grey scale difference
The sum of value；
The imbibition degree formula of land are as follows:
The imbibition degree formula of negative line are as follows:
Wherein, Nx, NyThe respectively setting width and print span of land and negative line；Df (x) is imbibition degree, is worth smaller, image
It is more clear；
The formula of the sum of grey scale difference absolute value algorithm is as follows:
Wherein, M, N are respectively the width and height of image；F (x, y) indicates the gray value in image (x, y) point；D (f) is grey scale difference
The sum of absolute value；
(3) to being printed with the cotton fabric of trellis diagram as test sample, according to contrived experiment come establishment officer, using single stimulation
Method, the multiple test samples of tester's random observation, and be random, tester to the sequence of different tester's test samples
The test sample of observation is given a mark；Average treatment is normalized to the score that tester beats and obtains subjective assessment score value,
Specific calculation formula are as follows:
MOSjExpression is the mean opinion score of j test image to number,Effective marking after indicating rejecting abnormalities data
Number,Indicate effective marking to image；Abnormal data judgement generallys use r distribution and is determined that i.e. observer i is to figure
If the marking as j existsOutside section, then it is assumed that abnormal data,
α is confidence level, ujAnd σjFor the mean value and standard deviation of original marking.
2. the evaluation method of cotton fabric digit printing clarity as described in claim 1, which is characterized in that the land and
The width of negative line lines is 0.1-1.9mm.
3. the evaluation method of cotton fabric digit printing clarity as described in claim 1, which is characterized in that the cotton fabric
Digital printing process it is as follows:
Pad starching (80%-90% pad dyeing rate) → drying (100 DEG C) → ironing fabric (100 DEG C) → digit printing → decatize
(saturated vapor, 105 DEG C, 10min) → cold water wash → hot water wash → soap (soaping agent 2g/L, 95 DEG C, 10min) → cold water wash →
Drying；Wherein, the bath raio soaped is 1:50.
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| CN1166552A (en) * | 1996-05-02 | 1997-12-03 | 佳能株式会社 | Ink-jet printing process and print |
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| CN1166552A (en) * | 1996-05-02 | 1997-12-03 | 佳能株式会社 | Ink-jet printing process and print |
| CN106758384A (en) * | 2016-12-15 | 2017-05-31 | 顾朝晖 | A kind of digit printing technique of real silk fabric |
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| 高普等: "数码印花精细度与织物组织结构的关系", 《印染》 * |
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| CN114371116A (en) * | 2021-12-30 | 2022-04-19 | 北京红山信息科技研究院有限公司 | Road test quality evaluation method based on permeability |
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