CN106152965B - cigarette filter depth detection system and method - Google Patents
cigarette filter depth detection system and method Download PDFInfo
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- CN106152965B CN106152965B CN201610750141.4A CN201610750141A CN106152965B CN 106152965 B CN106152965 B CN 106152965B CN 201610750141 A CN201610750141 A CN 201610750141A CN 106152965 B CN106152965 B CN 106152965B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/22—Measuring arrangements characterised by the use of optical techniques for measuring depth
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Abstract
The present invention relates to a kind of cigarette filter depth detection system, including light supply apparatus, processing unit and more than two cameras, two cameras of arbitrary neighborhood constitute binocular camera.Light supply apparatus and binocular camera are 100 degree to 130 degree relative to the angle of cigarette wrapper, so that at the top of the cigarette filter and inside of cigarette wrapper forms different intensities of light reflection, thus the clearly edge image at the top of the available cigarette filter of binocular camera and at the top of cigarette wrapper.Processing unit carries out binocular distance measurement processing according to the edge image at the top of cigarette filter and at the top of cigarette wrapper, obtains the distance and output at the top of cigarette filter and at the top of cigarette wrapper.It is illuminated by light supply apparatus and obtains cigarette filter top and cigarette wrapper top edge image, the depth detection of cigarette filter is carried out using passive vision, without projective structure light, common light source is only needed to be illuminated, the calorific value for greatly reducing system improves the operation stability of system.
Description
Technical field
The present invention relates to detection device technical fields, more particularly to a kind of cigarette filter depth detection system and side
Method.
Background technique
Cigarette is one kind of tobacco product.Preparation method is tobacco to be dried rear chopping, then with paper roll at 120mm is about, directly
The drum-shaped strip of diameter 10mm.Wherein one end is lighted when sucking, the smog generated is then sucked out with mouth in the other end.Cigarette mistake
The suspended particles generated when the smog of entrance, tar and burning when filter tip is used to reduce smoking suck cigarette to human body to reduce
Harm.
Traditional cigarette filter depth detection system mainly uses camera and projector combined system or camera and laser
Combined system detects the depth difference of cigarette filter and outer packing by the method for active vision.Its principle is by specific tool
Have on the light projection to three-dimension object of structural information, is perceived by the change in location of analysis projection striation or image three-dimensional deep
Degree.Due to needing to carry out product the projection of structure light, i.e. texture image or laser scanning.Whether laser or projector be all
A large amount of heat can be generated, stability of the system in working long hours, traditional cigarette filter depth detection system are influenced
Have the shortcomings that operation stability is low.
Summary of the invention
Based on this, it is necessary in view of the above-mentioned problems, providing a kind of cigarette filter depth inspection that operation stability can be improved
Examining system and method.
A kind of cigarette filter depth detection system, including light supply apparatus, processing unit and more than two cameras, arbitrarily
The camera of adjacent two constitutes binocular camera；The light supply apparatus and folder of the binocular camera relative to cigarette wrapper
Angle is 100 degree to 130 degree, and the processing unit connects the binocular camera；
The light supply apparatus is used to emit the cigarette inside light beam to the cigarette wrapper and the cigarette wrapper
Filter tip, the binocular camera are used to receive the light beam of the cigarette wrapper and the cigarette filter snout reflex, obtain cigarette
Edge image at the top of filter tip and at the top of cigarette wrapper is simultaneously exported to the processing unit；The processing unit is used for basis
Edge image at the top of the cigarette filter and at the top of cigarette wrapper carries out binocular distance measurement processing, obtains cigarette filter
Distance and output at the top of mouth and at the top of cigarette wrapper.
A kind of cigarette filter depth detection method, includes the following steps：
Light supply apparatus emits the cigarette filter inside light beam to cigarette wrapper and the cigarette wrapper；
Binocular camera receives the light beam of the cigarette wrapper and the cigarette filter snout reflex, obtains cigarette filter top
Edge image at the top of portion and cigarette wrapper is simultaneously exported to processing unit；The light supply apparatus and the binocular camera relative to
The angle of cigarette wrapper is 100 degree to 130 degree；
The processing unit is carried out according to the edge image at the top of the cigarette filter and at the top of the cigarette wrapper
Binocular distance measurement processing obtains the distance and output at the top of the cigarette filter and at the top of the cigarette wrapper.
Above-mentioned cigarette filter depth detection system and method, light supply apparatus and binocular camera are relative to cigarette wrapper
Angle is 100 degree to 130 degree, so that at the top of the cigarette filter and inside of cigarette wrapper forms different intensities of light reflection, from
And the clearly edge image at the top of the available cigarette filter of binocular camera and at the top of cigarette wrapper.Processing unit root
Binocular distance measurement processing is carried out according to the edge image at the top of cigarette filter and at the top of cigarette wrapper, obtains cigarette filter
Distance and output at the top of top and cigarette wrapper.Illuminated by light supply apparatus and obtain at the top of cigarette filter and
Cigarette wrapper top edge image carries out the depth detection of cigarette filter using passive vision, is not necessarily to projective structure light, only
It needs common light source to be illuminated, greatly reduces the calorific value of system, improve the operation stability of system.
Detailed description of the invention
Fig. 1 is the structure chart of cigarette filter depth detection system in an embodiment；
Fig. 2 is in edge when different angles for light supply apparatus in an embodiment from binocular camera relative to cigarette wrapper
The schematic diagram of image；
Fig. 3 is the schematic diagram that processing unit carries out binocular distance measurement processing in an embodiment；
Fig. 4 is the flow chart of cigarette filter depth detection method in an embodiment.
Specific embodiment
In one embodiment, a kind of cigarette filter depth detection system, as shown in Figure 1, include light supply apparatus 110,
Two cameras of processing unit and more than two cameras, arbitrary neighborhood constitute binocular camera 120.Light supply apparatus 110 and binocular
Camera 120 is 100 degree to 130 degree relative to the angle of cigarette wrapper 210, and processing unit connects binocular camera 120.Light source dress
110 and angle of the binocular camera 120 relative to cigarette wrapper 210 are set, that is, refer to that light supply apparatus 110 emits light beam to cigarette packets
The incident light and 210 the reflected beams of cigarette wrapper for filling paper 210 are to the angle between the reflected light of binocular camera 120.
Light supply apparatus 110 is used to emit the cigarette filter inside light beam to cigarette wrapper 210 and cigarette wrapper 210
Mouth 220, binocular camera 120 are used to receive the light beam that cigarette wrapper 210 and cigarette filter 220 reflect, obtain cigarette filter
The edge image at 210 top of 220 top of mouth and cigarette wrapper is simultaneously exported to processing unit.Processing unit is used for according to cigarette mistake
The edge image at 210 top of 220 top of filter tip and cigarette wrapper carries out binocular distance measurement processing, obtains cigarette filter
Distance and output at the top of 220 tops and cigarette wrapper 210.
The concrete type of light supply apparatus 110 is not unique, concretely LED (Light Emitting Diode, shine two
Pole pipe) light supply apparatus.Calorific value is reduced using LED light source, and reduces testing cost.Light supply apparatus 110 emits light beam
Concrete mode it is also not unique, in the present embodiment, light supply apparatus 110 is strip light or parallel light source device, guarantees imaging
Consistency.
The concrete type of camera is not equally uniquely that in the present embodiment, camera is industrial camera.Use the work of low cost
Industry camera is reduced costs instead of laser scanner or projector.In addition, industrial camera figure is small and exquisite, deployment way is cleverer
It is living.
Light supply apparatus 110 and binocular camera 120 can be according to cigarettes relative to the specific value of the angle of cigarette wrapper 210
The standard depth of filter tip 220 is different and different.When light supply apparatus 110 emits light beam to cigarette wrapper 210, cigarette filter
220 top of mouth and the inside of cigarette wrapper 210 form different intensities of light reflection, thus the available cigarette of binocular camera 120
The clearly edge image at 210 top of 220 top of filter tip and wrapping paper.
It is illustrated in figure 2 the binocular camera when angle is respectively 90 degree, 100 degree, 110 degree, 120 degree, 130 degree and 140 degree
The edge image that 120 shootings obtain.It is observed that light and shade boundary can be generated when angle is too small, at the top of cigarette filter 220
Line can generate interference to subsequent calculating；And when angle is excessive, 220 top of 210 inner wall of cigarette wrapper and cigarette filter
Image contrast is too small, is unfavorable for accurately extracting profile.In the present embodiment, light supply apparatus 110 and binocular camera 120 are relative to perfume (or spice)
The angle of cigarette wrapping paper 210 is 110 degree or 120 degree, both can avoid generating bright-dark cut at the top of cigarette filter 220, can also
The image contrast for ensuring 220 top of 210 inner wall of cigarette wrapper and cigarette filter, it is quasi- to improve cigarette filter depth detection
True property and reliability.
It, can also be to whole packet or more it is appreciated that above-mentioned cigarette filter depth detection system both can detecte single cigarette
Zhi Xiangyan is detected simultaneously.More cigarettes are placed in parallel by same direction.Use same illumination and shooting angle
The image of multiple cigarette filters 220 is obtained in the same visual field.To realize the function of more cigarette of one-time detection.
The quantity of camera specifically can be two, and the binocular camera of composition is shot to obtain corresponding edge image.This
Outside, the quantity of camera is also possible to three or more, is extended to multicamera system.Position in advance to each camera and angle can be passed through
It is designed, computes repeatedly adjacent binocular camera to same branch cigarette.Regard arbitrary two adjacent cameras as double
Mesh camera carries out depth detection to different cigarette filters respectively, to realize the covering to greater room, improves cigarette
The convenience of filter tip depth detection.
In one embodiment, the optical axis of camera and the angle of horizontal plane are 45 degree to 60 degree, guarantee that phase function is clapped simultaneously
To 220 top of 210 top of cigarette wrapper and cigarette filter, camera imaging accuracy is improved.
Processing unit passes through after the edge image for receiving 210 top of 220 top of cigarette filter and cigarette wrapper
The distance at 210 top of 220 top of cigarette filter and cigarette wrapper and output is calculated in binocular distance measurement processing, realizes
Cigarette filter depth detection.Export the mode of the distance at 210 top of the top of cigarette filter 220 and cigarette wrapper not only
One, it specifically can be output and shown to display device, be also possible to output to storage device and stored.
Above-mentioned cigarette filter depth detection system is illuminated by light supply apparatus 110 and obtains cigarette filter 220
210 top edge image of top and cigarette wrapper carries out the depth detection of cigarette filter using passive vision, without throwing
Penetrate structure light, it is only necessary to which common light source is illuminated, and the calorific value of system is greatly reduced, and improves the stable of system
Property.
In one embodiment, processing unit is used for the side to 210 top of 220 top of cigarette filter and cigarette wrapper
Edge image carries out feature extraction, obtains the point on 220 overhead pulley profile of cigarette filter in the coordinate and cigarette packets of edge image
The point at the top of paper on 210 contour lines is filled in the coordinate of edge image；According to the point on 220 overhead pulley profile of cigarette filter on side
The coordinate of edge image obtains plane where the point on 220 overhead pulley profile of cigarette filter, according to 210 overhead pulley of cigarette wrapper
Point on profile obtains the three-dimensional coordinate of the point on 210 overhead pulley profile of cigarette wrapper in the coordinate of edge image；And it calculates
It is flat where point on the three-dimensional coordinate of point on 210 overhead pulley profile of cigarette wrapper to 220 overhead pulley profile of cigarette filter
The average distance in face obtains the distance at 210 top of 220 top of cigarette filter and cigarette wrapper and output.
Due to the difference of reflected light, the contour line at 210 top of cigarette wrapper can be clearly obtained in edge image
And the contour line on 220 top of cigarette filter.Processing unit carries out feature to edge image and mentions after receiving edge image
Processing is taken, the line feature that will acquire as 210 overhead pulley profile of cigarette wrapper, make by the circular feature that will acquire
For 220 overhead pulley profile of cigarette filter, point and cigarette filter on 210 overhead pulley profile of cigarette wrapper are obtained respectively
Coordinate of the point on edge image on 220 overhead pulley profiles is used as processing unit and calculates 210 top contour line of cigarette wrapper
On point 220 top contour line of three-dimensional coordinate and cigarette filter on the three-dimensional coordinate put.
Processing unit can be the seat that identical point in two obtained edge images is shot by extracting binocular camera 120
Mark, and then calculate the three-dimensional coordinate of the point；It is also possible to export two edge images to display device and shows, receives and survey
The selection instruction of examination personnel input obtains the coordinate of identical point in two edge images according to selection instruction to calculate the three of the point
Tie up coordinate.For example, can then be calculated automatically from the point when tester clicks identical position in two edge images with mouse
Coordinate in two edge images.
Specifically, it is with the coordinate and corresponding three-dimensional coordinate that obtain the point on 210 overhead pulley profile of cigarette wrapper
Example.As shown in figure 3, two cameras of binocular camera 120 are respectively as left camera and right camera and left camera optical axis and right camera
Optical axis is parallel, and the edge image that corresponding shooting obtains is respectively as left figure phase and right image.Two cameras are shot in synchronization
Obtain same point P (x on 210 overhead pulley profile of cigarette wrapperc, yc, zc), point P is respectively in the coordinate of two edge images
Pleft(Xleft, Yleft) and Pright(Xright, Yright).The edge image shot due to two cameras is in approximately the same plane
On, then the coordinate Y of point P is identical, i.e. Yleft=Yright=Y.Then obtained by triangle geometrical relationship：
Wherein, B is the distance of 120 projection centre line of binocular camera, and f is camera focus.
The parallax Disparity=X of binocular camera 120left—Xright.It can thus be concluded that the three-dimensional coordinate of point P is：
Wherein, (xc, yc, zc) be point P three-dimensional coordinate, Disparity be binocular camera 120 parallax, B be binocular phase
The distance of 120 projection centre line of machine, f is camera focus.XleftIt is point P in the abscissa of left image, Y is point P in left image
With the ordinate of right image.
It is calculated separately to obtain the three-dimensional coordinate of the point on 210 top contour line of cigarette wrapper according to above-mentioned calculation formula,
And the three-dimensional coordinate put on 220 top contour line of cigarette filter.Choose three points on 220 top contour line of cigarette filter
Three-dimensional coordinate, plane where point can be determined on 220 top contour line of cigarette filter, so as to calculate cigarette wrapper
The average departure of plane where point on the three-dimensional coordinate of point on 210 overhead pulley profiles to 220 overhead pulley profile of cigarette filter
From obtaining the distance at 210 top of the top of cigarette filter 220 and cigarette wrapper.
In the present embodiment, processing unit reconstructs on 210 top contour line of cigarette wrapper according to Binocular Vision Principle
Then the three-dimensional coordinate put on the 220 top contour line of three-dimensional coordinate and cigarette filter of point calculates cigarette wrapper 210
The average distance of plane is made where point on the three-dimensional coordinate of point on overhead pulley profile to 220 overhead pulley profile of cigarette filter
For the depth of filter tip, accuracy in detection height.
It, can also be by choosing on 210 overhead pulley profile of cigarette wrapper three points it is appreciated that in other embodiments
Plane where the point on 210 overhead pulley profile of cigarette wrapper is calculated in three-dimensional coordinate, and directly calculating cigarette wrapper 210 pushes up
The distance between plane is used as cigarette where point in plane where point on contouring line and 220 top contour line of cigarette filter
The distance at 210 top of 220 top of filter tip and cigarette wrapper.
In one embodiment, cigarette filter depth detection system further includes connecting the display device of processing unit.Place
Reason device is used to export 220 top of cigarette filter and distance to the display device at 210 top of cigarette wrapper is shown, with
Just tester observes.
In one embodiment, cigarette filter depth detection system further includes the storage device for connecting processing unit.Place
Distance to the storage device that reason device is used to export 210 top of 220 top of cigarette filter and cigarette wrapper is stored.
In addition, cigarette filter depth detection system may also include fixed frame, light supply apparatus 110 and binocular camera 120 are equal
Be fixedly installed on fixed frame, it is ensured that light supply apparatus 110 and camera fix 120 it is relatively stable, it is accurate to improve depth detection
Property.
In one embodiment, a kind of cigarette filter depth detection method is based on above-mentioned cigarette filter depth detection
System is realized.As shown in figure 4, this approach includes the following steps：
Step S110：Light supply apparatus emits the cigarette filter inside light beam to cigarette wrapper and cigarette wrapper.
The concrete type of light supply apparatus is not unique, concretely LED light source device, reduces calorific value, and reduce
Testing cost.The concrete mode that light supply apparatus emits light beam is not also unique, and in the present embodiment, light supply apparatus is for strip light or in parallel
Radiant device guarantees the consistency of imaging.
Step S120：Binocular camera receives the light beam of cigarette wrapper and cigarette filter snout reflex, obtains cigarette filter
Edge image at the top of top and cigarette wrapper is simultaneously exported to processing unit.
Two cameras of arbitrary neighborhood constitute binocular camera, the folder of light supply apparatus and binocular camera relative to cigarette wrapper
Angle is 100 degree to 130 degree.The concrete type of camera is not equally uniquely that in the present embodiment, camera is industrial camera.It uses
The industrial camera of low cost is reduced costs instead of laser scanner or projector.In addition, industrial camera figure is small and exquisite, portion
Management side formula is more flexible.
In the present embodiment, light supply apparatus and binocular camera are 110 degree or 120 degree relative to the angle of cigarette wrapper, both
Can avoid generating bright-dark cut at the top of cigarette filter, also ensure that at the top of cigarette wrapper inner wall and cigarette filter at
Image contrast improves cigarette filter depth detection accuracy and reliability.
In one embodiment, the optical axis of camera and the angle of horizontal plane are 45 degree to 60 degree, guarantee that phase function is clapped simultaneously
At the top of to cigarette wrapper and at the top of cigarette filter, camera imaging accuracy is improved.
Step S130：Processing unit carries out binocular according to the edge image at the top of cigarette filter and at the top of cigarette wrapper
Visual token processing obtains the distance and output at the top of cigarette filter and at the top of cigarette wrapper.
Processing unit passes through binocular vision after receiving the edge image at the top of cigarette filter and at the top of cigarette wrapper
Feel that the distance and output at the top of cigarette filter and at the top of cigarette wrapper is calculated in ranging processing, realizes that cigarette filter is deep
Degree detection.The mode for exporting the distance at the top of cigarette filter and at the top of cigarette wrapper is not unique, specifically can be output
It is shown to display device, is also possible to output to storage device and is stored.
Above-mentioned cigarette filter depth detection method, illuminated by light supply apparatus and obtain at the top of cigarette filter with
And cigarette wrapper top edge image, the depth detection of cigarette filter is carried out using passive vision, is not necessarily to projective structure light,
It only needs common light source to be illuminated, greatly reduces the calorific value of system, improve the operation stability of system.
In one embodiment, step S130 includes step 132 to step 138.
Step 132：Feature extraction is carried out to the edge image at the top of cigarette filter and at the top of cigarette wrapper, obtains perfume (or spice)
Point of the point on the coordinate and cigarette wrapper overhead pulley profile of edge image on tobacco filters overhead pulley profile is in edge graph
The coordinate of picture.
Step 134：Cigarette filter is obtained in the coordinate of edge image according to the point on cigarette filter overhead pulley profile
Plane where point on overhead pulley profile.
Step 136：Cigarette wrapper is obtained in the coordinate of edge image according to the point on cigarette wrapper overhead pulley profile
The three-dimensional coordinate of point on overhead pulley profile.
Step 138：The three-dimensional coordinate of the point on cigarette wrapper overhead pulley profile is calculated to cigarette filter top profile
The average distance of plane where point on line obtains the distance and output at the top of cigarette filter and at the top of cigarette wrapper.
In the present embodiment, the three-dimensional of the point on the contour line of cigarette wrapper top is reconstructed according to Binocular Vision Principle and is sat
Then the three-dimensional coordinate put on mark and cigarette filter top contour line calculates the point on cigarette wrapper overhead pulley profile
Three-dimensional coordinate to cigarette filter overhead pulley profile on point where plane depth of the average distance as filter tip, detect
Accuracy is high.
It is appreciated that in other embodiments, it can also be by choosing three of three points on cigarette wrapper overhead pulley profile
Plane where the point on cigarette wrapper overhead pulley profile is calculated in dimension coordinate, directly calculating cigarette wrapper overhead pulley profile
On point where on plane and cigarette filter top contour line the distance between plane where point as at the top of cigarette filter
With the distance at the top of cigarette wrapper.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (8)
1. a kind of cigarette filter depth detection system, which is characterized in that including light supply apparatus, processing unit and more than two
Camera, the camera of two of arbitrary neighborhood constitute binocular camera；The light supply apparatus and the binocular camera are relative to cigarette
The angle of wrapping paper is 100 degree to 130 degree, and the processing unit connects the binocular camera；
The light supply apparatus is used to emit the cigarette filter inside light beam to the cigarette wrapper and the cigarette wrapper
Mouth, the binocular camera are used to receive the light beam of the cigarette wrapper and the cigarette filter snout reflex, obtain cigarette filter
Edge image at the top of mouth and at the top of cigarette wrapper is simultaneously exported to the processing unit；The processing unit is used for according to
Edge image at the top of cigarette filter and at the top of the cigarette wrapper carries out binocular distance measurement processing, specifically, to institute
It states the edge image at the top of cigarette filter and at the top of the cigarette wrapper and carries out feature extraction, obtain at the top of cigarette filter
Point of the point on the coordinate and cigarette wrapper overhead pulley profile of the edge image on contour line is in the edge image
Coordinate；It is obtained at the top of cigarette filter according to the point on the cigarette filter overhead pulley profile in the coordinate of the edge image
Plane where point on contour line, obtains perfume (or spice) in the coordinate of the edge image according to the point on cigarette wrapper overhead pulley profile
The three-dimensional coordinate of point on cigarette wrapping paper overhead pulley profile；And calculate the three-dimensional of the point on the cigarette wrapper overhead pulley profile
The average distance of plane where point on coordinate to the cigarette filter overhead pulley profile, obtains at the top of the cigarette filter
With the distance at the top of the cigarette wrapper and output.
2. cigarette filter depth detection system according to claim 1, which is characterized in that the light supply apparatus with it is described
Binocular camera is 110 degree or 120 degree relative to the angle of cigarette wrapper.
3. cigarette filter depth detection system according to claim 1, which is characterized in that the optical axis and water of the camera
The angle of plane is 45 degree to 60 degree.
4. cigarette filter depth detection system according to claim 1, which is characterized in that the camera is industrial phase
Machine.
5. cigarette filter depth detection system according to claim 1, which is characterized in that the light supply apparatus is LED
Light supply apparatus.
6. cigarette filter depth detection system according to claim 1, which is characterized in that the light supply apparatus is parallel
Radiant device.
7. cigarette filter depth detection system according to claim 1, which is characterized in that further include connecting the processing
The display device and/or storage device of device.
8. a kind of cigarette filter depth detection method, which is characterized in that include the following steps：
Light supply apparatus emits the cigarette filter inside light beam to cigarette wrapper and the cigarette wrapper；
Binocular camera receives the light beam of the cigarette wrapper and the cigarette filter snout reflex, obtain at the top of cigarette filter and
Edge image at the top of cigarette wrapper is simultaneously exported to processing unit；The light supply apparatus and the binocular camera are relative to cigarette
The angle of wrapping paper is 100 degree to 130 degree；
The processing unit carries out binocular according to the edge image at the top of the cigarette filter and at the top of the cigarette wrapper
Visual token processing obtains the distance and output at the top of the cigarette filter and at the top of the cigarette wrapper；It specifically includes：
Feature extraction is carried out to the edge image at the top of the cigarette filter and at the top of the cigarette wrapper, obtains cigarette mistake
Point of the point on the coordinate and cigarette wrapper overhead pulley profile of the edge image on filter tip overhead pulley profile is on the side
The coordinate of edge image；
It is obtained at the top of cigarette filter according to the point on the cigarette filter overhead pulley profile in the coordinate of the edge image
Plane where point on contour line；
Cigarette wrapper top profile is obtained in the coordinate of the edge image according to the point on cigarette wrapper overhead pulley profile
The three-dimensional coordinate of point on line；
It calculates on the three-dimensional coordinate to the cigarette filter overhead pulley profile of the point on the cigarette wrapper overhead pulley profile
Point where plane average distance, obtain the distance and output at the top of cigarette filter and at the top of cigarette wrapper.
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| CN111947591A (en) * | 2020-07-06 | 2020-11-17 | 中国电子科技集团公司第四十一研究所 | Cigarette filter tip pattern depth detection device and method |
| CN112432953B (en) * | 2020-11-20 | 2024-03-15 | 中国电子科技集团公司第四十一研究所 | Cigarette pack missing and anti-cigarette detection method based on machine vision technology |
| US11974595B2 (en) | 2022-09-13 | 2024-05-07 | China Tobacco Yunnan Industrial Co., Ltd | Method for testing burning performance of dark-colored cigarette using dark-colored cigarette paper |
| CN116046771A (en) * | 2022-09-13 | 2023-05-02 | 云南中烟工业有限责任公司 | Method for testing burning performance of dark cigarette by using dark cigarette paper |
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