CN106404792B - A kind of acetes chinensis method of the high photosensitiveness tobacco shred wrapping paper based on Machine Vision Recognition Technology - Google Patents
A kind of acetes chinensis method of the high photosensitiveness tobacco shred wrapping paper based on Machine Vision Recognition Technology Download PDFInfo
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Abstract
The acetes chinensis method of the present invention relates to a kind of high photosensitiveness tobacco shred wrapping paper based on Machine Vision Recognition Technology, comprising the following steps: (1) wrapping paper to be detected is launched into plane and be placed on testboard；(2) the D65 standard sources of homogeneous constant is opened；(3) separate unit CCD camera is selected, shoots full width standard picture in fixed position, and obtain entire image signal；(4) acquired entire image signal is divided into 32 pieces of different regions, and the picture signal in each region is turned into digital signal, i.e. rgb value by A/D conversion；(5) by the rgb value X in each region1To X32It is substituting in regression equation, calculates a wrapping paper entirety RGB index YRGB indexNumerical value；(6) in kind measure and calculate respectively the whole RGB index Y of standard cigarettes bar wrapping paper and tobacco shred wrapping paper to be comparedRGB indexNumerical value Y1And Y2, as │ Y2‑Y1│/Y1When≤5%, it is believed that two high photosensitiveness tobacco shred wrapping paper no color differneces to be compared.
Description
Technical field
The invention belongs to tobacco shred wrapping paper appearance quality trait fields, and in particular to one kind passes through Machine Vision Recognition skill
Color difference analysis method of the art to high photosensitiveness tobacco shred wrapping paper.
Background technique
Tobacco shred wrapping paper presentation quality directly carries the external image and antiforge function of cigarette product, determines cigarette
Ultimate consumer affects selection of the consumer to cigarette product to the first impression of cigarette product to a certain extent.Volume
Cigarette consumer requires cigarette interior quality and packaging quality to be consistent the favor of cigarette product, and color difference is tobacco shred packaging
The important indicator that paper printing quality is examined directly influences the packaging quality and corporate image and current cigarette of cigarette product
Item packs one of the difficult point of paper quality control.At present evaluating cigarette item, box packaging quality consistency, generally use subjective visual inspection
Method or color difference meter method will be printed product and compared with standard sample, to determine whether there are color difference.Tobacco shred packaging color difference be
Refer to printed matter output during due to personnel, equipment, raw material, technology, measurement etc. difference so that printed matter with
The heterochromia formed between original copy in coloristic areas.
Traditional evaluation method of tobacco shred wrapping paper color difference mainly has visual subjective methods and integrating sphere type spectrophotometer method.
Visual subjective methods are since impression degree of the crowd to color difference is different, and there are biggish uncertainties；Integrating sphere type is divided light
Instrument method is spent, differentiates item since its detection aperture and area of detection are smaller, while using the mode for comparing reflection optical attenuation
The color difference of packaging.So cannot achieve the detection of full width sample, the detection for the tobacco shred wrapping paper color difference containing high photosensitiveness
Also due to the light intensity of background and mixed and disorderly reflection and there are bigger difficulty.Wherein the bloom tobacco shred wrapping paper refers to mirror surface
Reflectivity is greater than 30% paper.The visual effect of high photosensitiveness tobacco shred wrapping paper magnificent mansion due to light, is answered in cigarette with industry
With increasingly extensive, but because of the interference of reflected light, the difficulty of color difference control is also continuously increased, traditional acetes chinensis and analysis side
Method has been unable to meet Industry Control demand.Industry concern was become already for the detection method of high photosensitiveness tobacco shred wrapping paper color difference
One of emphasis.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide one kind based on Machine Vision Recognition Technology to bloom
The color difference analysis method of property tobacco shred wrapping paper, fast and accurately to complete the prison of high photosensitiveness tobacco shred wrapping paper presentation quality
Work is controlled, the quality of cigarette product is promoted.
The purpose of the present invention is achieved by the following technical programs.
A kind of color difference analysis method of the high photosensitiveness tobacco shred wrapping paper based on Machine Vision Recognition Technology, including following step
It is rapid:
(1) tobacco shred wrapping paper to be detected is launched into plane, and makes one with ink to be placed in testboard upwardly
On；
(2) it is arranged and opens the D65 standard sources of a homogeneous constant on testboard；
(3) separate unit CCD camera is selected, in the full width standard drawing of the fixed position shooting high photosensitiveness bar wrapping paper of cigarette
Picture is always on light source in entire shooting process, and obtains entire image signal；
(4) acquired entire image signal is divided into 32 pieces of different regions, and by each piece of region of measured target
Picture signal by A/D conversion be turned into digital signal, i.e. rgb value；
(5) by the rgb value X in 32 pieces of regions of detected wrapping paper1To X32It is substituting in following regression equation, calculates
Wrapping paper entirety RGB index YRGB indexNumerical value:
YRGB index=10.766X1+10.789X2+9.554X3+9.522X4+8.724X5+8.717X6+8.821X7+8.639X8
+8.527X9+8.525X10+8.544X11+8.593X12+8.621X13+8.668X14+8.575X15+8.506X16+7.114X17+
7.038X18+7.226X19+7.025X20+7.129X21+7.018X22+7.029X23+7.086X24+5.038X25+5.035X26+
5.053X27+5.036X28+5.071X29+5.235X30+5.097X31+5.138X32；
(6) in kind measure and calculate respectively standard cigarettes bar wrapping paper and tobacco shred wrapping paper to be compared
Whole RGB index YRGB indexNumerical value Y1And Y2, as │ Y2-Y1│/Y1When≤5%, it is believed that two high photosensitiveness tobacco shred packagings to be compared
Paper no color differnece.
Wherein the CCD camera preferably has fine definition and high speed camera, wherein " fine definition " refers to resolution
Rate is at least 5,000,000 pixels, preferably at least 8,000,000 pixels, more preferably at least 10,000,000 pixels.Wherein " high speed " refers at least every
Second beats takes the photograph 10 photos.
It is listed in the following table 1 for the rgb value in above-mentioned 32 pieces of regions, to tobacco shred wrapping paper entirety RGB index
Regression equation coefficient.
1 regression equation coefficient of table
Compared with the existing technology, the invention has the following advantages that
1, of the invention method is simple, and analytic process is quick, and calculated result is accurate, and adjustment is easy to operate, achievable
Non-destructive testing.
2, using Uniform Illumination technology, the reflected light interference of complicated and high photosensitiveness tobacco shred wrapping paper can be successfully managed, subtracted
Small human error improves efficiency, repeatability is high.
3, Machine Vision Recognition Technology is a kind of technology for standardizing view mode.In a standardized way instead of human eye
Carry out the entire plane of testing product, rather than some point on product, this greatly expands sample representation, improves detection
Reliability.
4, what analytic process acquired is the entire image signal of tobacco shred wrapping paper, is assigned to the subregion RGB of entire image
Different weights is given to calculate whole RGB index YAs referring toNumerical value and compare.More fully to wrapping paper color difference analysis, it is
Ensure that cigarette presentation quality and the stability of technique production provide advantageous technical support.
Detailed description of the invention
Fig. 1 is that tobacco shred wrapping paper picture signal divides area schematic.
Fig. 2 is the in-profile figure of Machine Vision Recognition equipment, and figure label: 1 is CCD camera；2 be testboard；3 are
D65 standard sources；4 be image-signal processor；5 be sample to be tested.
Specific embodiment
The present invention is described in further detail by the following examples, but specific embodiment is not to skill of the present invention
The restriction of art scheme.
Embodiment 1
A, the same batch quantity-produced two of cloud and mist (Yunlong) is opened into high photosensitiveness bar wrapping paper and is launched into plane, and make band oil
The one side of ink is placed on testboard vertically upward.
B, it is arranged and using the D65 standard sources vertical irradiation of a homogeneous constant on testboard on sample to be tested.
C, selection has fine definition, the separate unit CCD camera of high-speed camera camera lens.It wants in the visual field according to sample to be tested
It asks, opens the uniform standard sources of D65 in (2), shoot the full width standard picture of the high photosensitiveness bar wrapping paper of cigarette, entirely shot
It is always on light source in journey, and obtains entire image signal.
D, acquired entire image signal is divided into 32 pieces of different regions, and by each piece of region of measured target
Picture signal is turned into digital signal, i.e. rgb value by A/D conversion.
E, the rgb value in 32 pieces of regions of detected wrapping paper is brought into respectively into following regression equation, and calculated
Wrapping paper entirety RGB index YRGB indexNumerical value:
YAs referring to=10.766X1+10.789X2+9.554X3+9.522X4+8.724X5+8.717X6+8.821X7+8.639X8+
8.527X9+8.525X10+8.544X11+8.593X12+8.621X13+8.668X14+8.575X15+8.506X16+7.114X17+
7.038X18+7.226X19+7.025X20+7.129X21+7.018X22+7.029X23+7.086X24+5.038X25+5.035X26+
5.053X27+5.036X28+5.071X29+5.235X30+5.097X31+5.138X32；
F, the whole RGB index Y of standard cigarettes bar wrapping paper and tobacco shred wrapping paper to be compared is calculated separatelyRGB index's
Numerical value Y1And Y2, as │ Y2-Y1│/Y1When≤5%, it is believed that two high photosensitiveness tobacco shred wrapping paper no color differneces to be compared.Specific data
Referring to table 2.As shown in Table 2, sample A and B measures entirety RGB index Y three times2With Y1Difference ratio mean value be 3.093%, say
Bright two samples are similar, appearance be not present color difference, this with range estimation determine result it is consistent, while also with the judgement result one of color difference meter
Cause, illustrate the color difference analysis method when judging the same brand trade mark color difference of same process condition, same materials accuracy compared with
Height has good practicability.
Table 2 is using distinct methods to the colour difference assessment result of sample A and B
Embodiment 2
Embodiment 1 is repeated, there is following difference:
A laboratory sample selects cloud and mist (soft to comply with one's wishes) label paper of different technology conditions, different material, by embodiment 1
Mode is placed and test sample.
B chooses sample C as standard, and calculates the whole RGB index Y of another sample D and itsAs referring toDifference value, as
The judgment basis of different sample color difference.Specific data are referring to table 3.As shown in Table 3, the whole RGB that sample C and D is measured three times refers to
Number Y2With Y1Difference ratio mean value be 21.130%, illustrate that there are notable differences for two sample colors, appearance chromatic difference is obvious, with
Range estimation determines that result is consistent, and the judgement result of color difference meter is there are nuance, illustrates the color difference analysis method high resolution
In color difference meter analysis method, have when judging the identic trade mark color difference of different technology conditions, different material more good reliable
Property.
Table 3 is using distinct methods to the colour difference assessment result of sample C and D
Claims (1)
1. a kind of acetes chinensis method of the high photosensitiveness tobacco shred wrapping paper based on Machine Vision Recognition Technology, including following step
It is rapid:
(1) high photosensitiveness tobacco shred wrapping paper to be detected is launched into plane, and makes one with ink to be placed in test upwardly
On platform；
(2) it is arranged and opens the D65 standard sources of a homogeneous constant on testboard；
(3) separate unit CCD camera is selected, shoots the full width standard picture of high photosensitiveness tobacco shred wrapping paper in fixed position, it is whole
It is always on light source in a shooting process, and obtains entire image signal；
(4) acquired entire image signal is divided into 32 pieces of different regions, and by the figure in each piece of region of measured target
As signal is turned into digital signal, i.e. rgb value by A/D conversion；Specific partitioning scenario is as follows:
Entire image is divided into 32 pieces of regions according to the form that four rows eight arrange, wherein each region is from left to right successively in the first row
Number is 1 to 8, and number consecutively is 9 to 16 from left to right in each region in the second row, and each region is successively compiled from left to right in the third line
It number is 17 to 24, number consecutively is 25 to 32 from left to right in each region in fourth line；
(5) by the rgb value X in high 32 pieces of regions of photosensitiveness tobacco shred wrapping paper detected1To X32It is substituting to following regression equation
In, calculate high photosensitiveness tobacco shred wrapping paper entirety RGB index YRGB indexNumerical value:
YRGB index=10.766X1+10.789X2+9.554X3+9.522X4+8.724X5+8.717X6+8.821X7+8.639X8+
8.527X9+8.525X10+8.544X11+8.593X12+8.621X13+8.668X14+8.575X15+8.506X16+7.114X17+
7.038X18+7.226X19+7.025X20+7.129X21+7.018X22+7.029X23+7.086X24+5.038X25+5.035X26+
5.053X27+5.036X28+5.071X29+5.235X30+5.097X31+5.138X32；
(6) in kind measure and calculate respectively standard cigarettes bar wrapping paper and high photosensitiveness tobacco shred wrapping paper to be compared
Whole RGB index YRGB indexNumerical value Y1And Y2, as │ Y2-Y1│/Y1When≤5%, it is believed that high photosensitiveness tobacco shred packaging to be compared
Paper no color differnece.
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| CN110243475B (en) * | 2019-05-05 | 2021-09-24 | 浙江乌镇街科技有限公司 | Fabric color difference detection method based on machine vision recognition technology |
| CN111579505A (en) * | 2020-04-23 | 2020-08-25 | 河南中烟工业有限责任公司 | Cigarette packaging material color difference detection method based on digital image processing |
| CN111739018B (en) * | 2020-07-27 | 2020-12-11 | 中建科技集团有限公司 | Chromatic aberration detection method, device, terminal and medium based on point cloud technology |
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