CN109840522A - A kind of big plane rod end tagging scheme and character picture antidote - Google Patents
A kind of big plane rod end tagging scheme and character picture antidote Download PDFInfo
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- CN109840522A CN109840522A CN201910017156.3A CN201910017156A CN109840522A CN 109840522 A CN109840522 A CN 109840522A CN 201910017156 A CN201910017156 A CN 201910017156A CN 109840522 A CN109840522 A CN 109840522A
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Abstract
A kind of big plane rod end tagging scheme and character picture antidote, the big plane rod end tab character of the scheme is made of hundred characters (1), ten characters (2), a character (3) and two dimensional code (4), and described method includes following steps: (1) acquiring big stick-means of intimidation end face figure like using vision system and pre-process；(2) big stick-means of intimidation end face center pixel coordinate is sought；(3) big plane rod end tab character image is acquired using vision system and pre-processed；(4) two dimensional code center pixel coordinate is sought；(5) it seeks once rotating angle and direction and doing primary rotation to image tentatively being corrected；(6) it cuts out image in 2 D code and seeks secondary rotating angle；(7) secondary rotating is done to big plane rod end character picture and completes final correction.Tagging scheme of the present invention is simple, readily identified, and the correction accuracy of character picture antidote is high.
Description
Technical field
The present invention relates to a kind of tagging scheme and its image correction methods, more particularly, to a kind of big plane rod end tagging scheme
And character picture antidote.
Background technique
Bar is the major product of present steel industry, even more the important production and processing raw material of industrial circle.In difference
Industry is also different the quality requirement of bar, and steel industry bar specification produced is also varied.Currently, stick
The end face character of material is completed by spray printing form, in face of the work of high-volume repeatability and uninteresting property, it is easy to make worker
It generates visual fatigue and leads to mistake occur, with the development of computer vision recognition technology, identify and replace using Visual intelligent
Human problems on existing production line become development trend.Therefore, there is an urgent need to the identification production lines of automation.To realize intelligence
It firstly the need of solution is bar section character tilt problem in identification process that information trace, which can be changed, so character antidote is
One of its core key technology.
For actual conditions in conjunction with steel mill's production line, during carrying out bar transportation, the stick when reaching specified station
The character of material end face is tilted in any angle, there is arbitrarily character posture, thus can cause shadow for subsequent identification work
It rings, so that recognition result is inaccurate, and the method for character correction is vital for entire identifying system, it is desirable that is appointed
The complete correction for tilt angle of anticipating.For big stick-means of intimidation biggish for diameter specifications in bar, face area is larger, can mark
More information.The present invention marks and identifies that problem proposes a kind of big plane rod end tagging scheme and character picture for big plane rod end
Antidote is used to solve the problems, such as the character of big plane rod end in image flame detection at any angle.
Summary of the invention
Based on the above reasons, the present invention is directed to propose a kind of big plane rod end tagging scheme and character picture antidote, are
Finally realize that the automatic identification of big plane rod end tab character establishes technical foundation.The present invention is according to proposition the characteristics of big stick-means of intimidation itself
A kind of big plane rod end tagging scheme and character picture antidote.
A kind of tab character of big plane rod end tagging scheme of the present invention is by hundred characters, 1, ten character 2, a 3 and of character
Two dimensional code 4 forms.Hundred characters, 1, ten character 2, a character 3 and two dimensional code 4 is arranged on big plane rod end and and big stick-means of intimidation
The edge of end face retains certain distance.Hundred characters, 1, ten character 2 and a character 3 equidistant horizontally disposed shape from left to right
The center for three characters that Cheng Sanwei character, hundred characters, 1, ten character 2 and a character 3 are formed is inclined in big stick-means of intimidation end face center
Under position, two dimensional code 4 is located at the surface big stick-means of intimidation end face center position on the upper side of ten characters 2.
Character antidote is divided into the correction of two steps: seeking the pixel coordinate value at two dimensional code center first, passes through trigonometric function
Find out initial rotation angle；Then rectifying for final angle is completed by statistics upright projection columns and the correction algorithm of minimum value
Just.
Included the following steps: using a kind of big plane rod end tab character antidote of tagging scheme of the present invention
(1) big stick-means of intimidation end face figure like is acquired using vision system and pre-processed；
(2) big stick-means of intimidation end face center pixel coordinate is sought；
(3) big plane rod end tab character image is acquired using vision system and pre-processed；
(4) two dimensional code center pixel coordinate is sought；
(5) it seeks once rotating angle and direction and doing primary rotation to image tentatively being corrected；
(6) it cuts out image in 2 D code and seeks secondary rotating angle；
(7) secondary rotating is done to big plane rod end tab character image and completes final correction.
The method have the benefit that: big plane rod end tagging scheme of the invention is simple, readily identified；Recognition methods
It is the pixel coordinate value for seeking two dimensional code center by the connected domain method of area analysis, primary rotation angle is found out by trigonometric function
Image in 2 D code is tentatively corrected and cut out, passes through statistics upright projection columns on the basis of cutting and obtain image in 2 D code
Secondary rotating angle is calculated with the correction algorithm of minimum value, secondary rotating is carried out to big plane rod end tab character image, it is complete
At the correction of final angle, there are higher correction accuracy and efficiency.
Detailed description of the invention
Fig. 1 is a kind of big plane rod end tagging scheme schematic diagram of the present invention；
Fig. 2 is an a kind of Principle of Rotating schematic diagram of big plane rod end tab character antidote of the present invention.
Specific embodiment
Using big stick-means of intimidation finishing line as application scenarios, illustrate the contents of the present invention and operation in conjunction with attached drawing 1-2.
A kind of tab character of big plane rod end tagging scheme of the present invention is by hundred characters, 1, ten character 2, a 3 and of character
Two dimensional code 4 forms.Hundred characters, 1, ten character 2, a character 3 and two dimensional code 4 is arranged on big plane rod end 5 and and big stick-means of intimidation
The edge of end face 5 retains certain distance.Hundred characters, 1, ten character 2 and a character 3 are equidistant from left to right horizontally disposed
Three characters are formed, the center for three characters that hundred characters, 1, ten character 2 and a character 3 are formed is in big plane rod end 5
Heart position on the lower side, two dimensional code 4 are located at big 5 center of plane rod end in the surface position on the upper side of ten characters 2.
It is 001-999 by three characters that hundred characters, 1, ten character 2 and a character 3 form, represents furnace production
The 1st to the 999th big stick-means of intimidation.The two-dimensional barcode information of two dimensional code 4 is including but not limited to hundred characters, 1, ten character 2 and a position
The information for three characters that character 3 forms.The area of two dimensional code 4 is greater than the face of hundred characters 1, ten character 2 and a character 3
Product.
Included the following steps: using a kind of big plane rod end tab character antidote of tagging scheme of the present invention
(1) big stick-means of intimidation end face figure like is acquired using vision system and pre-processed；
(2) big stick-means of intimidation end face center pixel coordinate is sought；
(3) big plane rod end tab character image is acquired using vision system and pre-processed；
(4) two dimensional code center pixel coordinate is sought；
(5) it seeks once rotating angle and direction and doing primary rotation to image tentatively being corrected；
(6) it cuts out image in 2 D code and seeks secondary rotating angle；
(7) secondary rotating is done to big plane rod end tab character image and completes final correction.
The vision system for the identification of big plane rod end tab character is established according to the environment for implementing scene, big stick-means of intimidation can be obtained
The clear image of end face.
1. using vision system acquisition big stick-means of intimidation end face figure like and pre-processing
Big stick-means of intimidation end face figure like is acquired using vision system, when acquisition needs illumination to keep big stick-means of intimidation end face figure like highlighted aobvious
Show, big stick-means of intimidation end face figure like is pre-processed, obtains the bianry image I of big plane rod end.
2. seeking big stick-means of intimidation end face center pixel coordinate
The pixel coordinate system of big stick-means of intimidation end face figure like is XOY, and the connected domain centre coordinate with big plane rod end bianry image is big
Plane rod end center pixel coordinate (x0,y0).Under MATLAB programming language environment, utilize regionprops (I, ' Centroid')
Big stick-means of intimidation end face center pixel coordinate (x is calculated in function0,y0), it is calculated and is rounded with regionprops (I, ' Area') function
Obtain the pixel value R of big plane rod end radius.
3. acquiring big plane rod end tab character image using vision system and pre-processing
Big plane rod end tab character image is acquired using vision system, when acquisition, which needs to close light source, makes big stick-means of intimidation end
Face tab character is highlighted, and is pre-processed to big plane rod end tab character image, and the two of big plane rod end tab character are obtained
It is worth image.Taking Δ is the pixel value greater than 0, then the big stick-means of intimidation end face figure like region after cutting are as follows: x direction scope [x0-R-Δ,x0+R
+ Δ], y direction scope [y0-R-Δ,y0+R+Δ].The bianry image II of the big plane rod end tab character obtained after cutting.
4. seeking two dimensional code center pixel coordinate
The size of image connectivity domain area is calculated the big plane rod end tab character image II of binaryzation.Big plane rod end label
The connected domain area of hundred characters, 1, ten character 2 and a character 3 is roughly the same in character, and the connected domain face of two dimensional code 4
Product will be significantly greater than the connected domain area of 1, ten character 2 and a character 3 of hundred characters.According to the connected domain face of two dimensional code 4
The maximum feature of product finds two dimensional code 4.
Using the connected domain centre coordinate of 4 bianry image of two dimensional code as two dimensional code center pixel coordinate.In MATLAB programming language
It says under environment, is calculated using regionprops (II, ' Centroid') function.
5, it seeks once rotating angle and direction and doing primary rotation to image tentatively being corrected
The relationship for obtaining two pixel coordinates of two dimensional code central point theoretical position and absolute fix is as shown in Figure 2.It is known
Pixel coordinate (the x of big stick-means of intimidation end face center0,y0), θ1For the angle once rotated, cross form point represents big plane rod end tab character
Without the center pixel coordinate under heeling condition, M shape point represents under big plane rod end tab character image heeling condition image
Heart pixel coordinate.Big plane rod end tab character image is (x without the center pixel coordinate under heeling condition0-R-Δ,y0-R-Δ)。
Pixel value distance of the r between big stick-means of intimidation end face center point and the two dimensional code central point of actual measurement is enabled, then two dimensional code central point theory position
It is set to (x0-r,y0), a is the pixel value distance between the two dimensional code central point and two dimensional code central point theoretical position of actual measurement.According to
θ1=arccos (1-a2/2r2) primary rotation angle, θ can be found out1.It also needs to judge rotation side after the primary rotation angle found out
To.The discrimination principles of direction of rotation be by judgement actual measurement two dimensional code central point be the left side of big stick-means of intimidation end face center also
It is right side, that is, the y value for the two dimensional code central point pixel coordinate surveyed is smaller or big than big stick-means of intimidation end face center pixel coordinate value,
If surveying two dimensional code central point pixel y-coordinate value is greater than R+ Δ, the two dimensional code central point surveyed is on right side, it is necessary to the inverse time
Needle rotation just can be carried out Slant Rectify.Conversely, needing to be corrected clockwise.It obtains after once rotating angle and direction of rotation,
Primary rotation is done to image tentatively to be corrected.θ is indicated with thet11, under MATLAB programming language environment, utilize function
Imrotate (II, thet1, ' bilinear', ' crop') carry out first time rotation it is preliminary correct tentatively corrected it is big
Plane rod end tab character image III.Function parameter thet1 is rotated counterclockwise by angle, the thet1 when once rotating to be counterclockwise
=θ1, the thet1=- θ when once rotating to be clockwise1。
6, it cuts out image in 2 D code and seeks secondary rotating angle
After completing an angle rotation, there is no big plane rod end tab character image is corrected completely, carry out two is also needed
Secondary correction.L is the side length of two dimensional code.In being first with image in 2 D code center the big plane rod end tab character image tentatively corrected
The heart cuts out image in 2 D code IV by the square of side length of L+ Δ, is then sought again with the image in 2 D code cut out secondary
The angle of rotation.
The method that secondary rotating angle is sought using is: one two is set on the basis of the image in 2 D code IV tentatively corrected
Secondary rotation angle range, carries out circulation rotating once in the range, and every degree of rotation just carries out the bianry image
Column circulation, to being counted with the numerical value not for 0 for each column gray value, character row and be not 0 that character is corrected completely
Columns it is minimum, using angle at this time as secondary rotating angle, θ2。
7, secondary rotating is done to big plane rod end tab character image and completes final correction
According to secondary rotating angle, θ obtained in the previous step2, the big plane rod end tab character image III tentatively corrected is done
The big plane rod end tab character image V finally corrected is finally corrected in secondary rotating completion.θ is indicated with thet22,
Under MATLAB programming language environment, carried out second using function imrotate (III, thet2, ' bilinear', ' crop')
Final correction is completed in rotation.
Claims (10)
1. a kind of big plane rod end tagging scheme, the scheme is suitable for that big stick-means of intimidation is marked and is known in big stick-means of intimidation finishing line
Not, the tab character of the scheme is made of hundred characters (1), ten characters (2), a character (3) and two dimensional code (4),
Be characterized in that, hundred characters (1), ten characters (2), a character (3) and two dimensional code (4) be arranged on big plane rod end and with
The edge of big plane rod end retains certain distance, and hundred characters (1), ten character (2) He Gewei characters (3) are equidistant from left to right
Three characters of horizontally disposed formation, the center for three characters that hundred characters (1), ten character (2) He Gewei characters (3) are formed
In big stick-means of intimidation end face center position on the lower side, two dimensional code (4) is located at the surface big stick-means of intimidation end face center position on the upper side of ten characters (2)
It sets.
2. a kind of big plane rod end tagging scheme according to claim 1, which is characterized in that hundred characters (1), ten characters
(2), the color of a character (3) and two dimensional code (4) is white, and the area of two dimensional code (4) is greater than hundred characters (1), ten words
Accord with the area of (2) He Gewei character (3).
3. a kind of big plane rod end tagging scheme according to claim 1, which is characterized in that by hundred characters on big plane rod end
(1), three characters of ten character (2) He Gewei characters (3) composition are 001-999, represent the 1st to the of furnace production
999 big stick-means of intimidation, the two-dimensional barcode information of two dimensional code (4) is including but not limited to hundred characters (1), ten character (2) He Gewei characters
(3) information of three characters formed.
4. a kind of big plane rod end tagging scheme according to claim 1, which is characterized in that hundred characters (1), ten characters
(2) He Gewei character (3) formed three characters integral position and two dimensional code (4) position up and down exchange technical solution and
Technical solution described in claim 1 has same technical effect.
5. a kind of big plane rod end tab character antidote, the method is for a kind of big plane rod end described in claim 1-4
Tagging scheme, which is characterized in that described method includes following steps:
(1) big stick-means of intimidation end face figure like is acquired using vision system and pre-processed；
(2) big stick-means of intimidation end face center pixel coordinate is sought；
(3) big plane rod end tab character image is acquired using vision system and pre-processed；
(4) two dimensional code center pixel coordinate is sought；
(5) it seeks once rotating angle and direction and doing primary rotation to image tentatively being corrected；
(6) it cuts out image in 2 D code and seeks secondary rotating angle；
(7) secondary rotating is done to big plane rod end tab character image and completes final correction.
6. a kind of big plane rod end tab character antidote according to claim 5, which is characterized in that use vision system
Vision system, which opens light source, when acquiring big stick-means of intimidation end face figure like is highlighted big stick-means of intimidation end face figure like；Big stick-means of intimidation is acquired using vision system
Vision system, which closes light source, when the tab character image of end face is highlighted big plane rod end tab character image.
7. a kind of big plane rod end tab character antidote according to claim 5, which is characterized in that according to big plane rod end
Hundred characters (1) in tab character, ten character (2) He Gewei characters (3) connected domain area is roughly the same and two dimensional code (4)
The feature of connected domain area maximum find two dimensional code (4).
8. a kind of big plane rod end tab character antidote according to claim 5, which is characterized in that seek big plane rod end
The connected domain centre coordinate of center pixel coordinate Shi Yi great plane rod end bianry image is big stick-means of intimidation end face center pixel coordinate；Seek two
Using the connected domain centre coordinate of two dimensional code (4) bianry image as two dimensional code center pixel coordinate when tieing up code center pixel coordinate.
9. a kind of big plane rod end tab character antidote according to claim 5, which is characterized in that seek once rotating
When angle and direction, according to θ1=arccos (1-a2/2r2) primary rotation angle, θ can be found out1, wherein r is big stick-means of intimidation end face center
Pixel value distance between point and the two dimensional code central point of actual measurement, a are the two dimensional code central point and two dimensional code central point reason of actual measurement
By the pixel value distance between position；If the two dimensional code central point of actual measurement on the right side of big stick-means of intimidation end face center, needs counterclockwise
Be rotated into line tilt correction, whereas if actual measurement two dimensional code central point in the left side of big stick-means of intimidation end face center, need clockwise into
Row correction.
10. a kind of big plane rod end tab character antidote according to claim 5, which is characterized in that seek secondary rotation
The method that gyration uses is: a secondary rotating angular range is set on the basis of the image in 2 D code tentatively corrected, at this
Circulation rotating once is carried out in range, every degree of rotation is just to the bianry image into row_column cycle, to each column gray scale
Value and do not counted for 0 numerical value, character row that character is corrected completely and be not 0 columns it is minimum, with this hour angle
Degree is used as secondary rotating angle.
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| CN117058220A (en) * | 2023-10-11 | 2023-11-14 | 天津施格自动化科技有限公司 | Fitting algorithm for measuring diameter and central point of metal rod by using distance sensor |
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| CN109840522B (en) | 2023-06-20 |
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