CN106022346B - A kind of cutting method and device of crown word number - Google Patents
A kind of cutting method and device of crown word number Download PDFInfo
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- CN106022346B CN106022346B CN201610348391.5A CN201610348391A CN106022346B CN 106022346 B CN106022346 B CN 106022346B CN 201610348391 A CN201610348391 A CN 201610348391A CN 106022346 B CN106022346 B CN 106022346B
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Abstract
The invention belongs to image cutting technique fields, provide the cutting method and device of a kind of crown word number.This method comprises: obtaining the crown word number region of bank note；Binary conversion treatment is carried out to the crown word number region of the bank note, to obtain the binary image in the crown word number region of the bank note；The binary image is scanned according to preset window, to obtain the row cutting position of crown word number in the binary image；The binary image is cut according to the row cutting position, to obtain the row cutting image of the binary image；According to the row cutting image and preset crown word number column cutting board, the column cutting position of crown word number in the row cutting image is determined；According to the column cutting position, crown word number is cut into from the row cutting image.The cutting speed and accuracy rate of crown word number can be improved through the invention.
Description
Technical field
The invention belongs to image cutting technique field more particularly to the cutting methods and device of a kind of crown word number.
Background technique
Crown word number is a kind of symbol in order to count the characteristics such as bank note printing quantity and label bank note uniqueness, crown word number
Identification has great importance for the market circulation of bank note.In the identification of crown word number, the cutting of crown word number is extremely important
One of the step of.
Currently, generalling use the cutting that contour detecting algorithm carries out crown word number.However, contour detecting algorithm need to traverse entirely
The profile of crown word number in crown word number region, operation is complicated, and calculating speed is slow, and there are when stain, be easy to incite somebody to action in crown word number region
Stain is mistaken for crown word number profile, leads to the position of location of mistake crown word number profile, reduces the accuracy rate of crown word number cutting.
Therefore, it is necessary to propose a kind of new technical solution, to solve the above technical problems.
Summary of the invention
In consideration of it, the embodiment of the present invention provides the cutting method and device of a kind of crown word number, to improve the cutting of crown word number
Speed and accuracy rate.
The embodiment of the present invention in a first aspect, providing a kind of cutting method of crown word number, which comprises
Obtain the crown word number region of bank note；
Binary conversion treatment is carried out to the crown word number region of the bank note, to obtain the two-value in the crown word number region of the bank note
Change image；
The binary image is scanned according to preset window, to obtain the row cleavage of crown word number in the binary image
It sets；
The binary image is cut according to the row cutting position, to obtain the row cutting drawing of the binary image
Picture；
According to the row cutting image and preset crown word number column cutting board, crown word number in the row cutting image is determined
Column cutting position；
According to the column cutting position, crown word number is cut into from the row cutting image.
The second aspect of the embodiment of the present invention, provides a kind of cutter device of crown word number, and described device includes:
Obtain module, binarization block, scan module, the first cutting module, determining module and the second cutting module；
The acquisition module, for obtaining the crown word number region of bank note；
The binarization block carries out binary conversion treatment for the crown word number region to the bank note, to obtain the paper
The binary image in the crown word number region of coin；
The scan module, for scanning the binary image according to preset window, to obtain the binary image
The row cutting position of middle crown word number；
First cutting module, for cutting the binary image according to the row cutting position, described in obtaining
The row cutting image of binary image；
The determining module, described in determining according to the row cutting image and preset crown word number column cutting board
The column cutting position of crown word number in row cutting image；
Second cutting module, for being cut into prefix from the row cutting image according to the column cutting position
Number.
Existing beneficial effect is the embodiment of the present invention compared with prior art: the embodiment of the present invention is swept according to preset window
The binary image for retouching the crown word number region of bank note positions the row cutting position of crown word number, and according to row cutting position cutting two
Value image, to obtain the row cutting image of binary image, according to row cutting image and preset crown word number column cutting board,
The column cutting position of crown word number in home row cutting image, is cut into crown word number according to column cutting position, in the positioning of crown word number
In cutting algorithm, the profile of crown word number in the entire crown word number region without traversing bank note, operation is simple, and calculating speed is fast, and
It is avoidable the problem of stain being mistaken for crown word number, location of mistake crown word number occur, improve the accuracy rate of crown word number cutting.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the implementation flow chart of the cutting method for the crown word number that the embodiment of the present invention one provides；
Fig. 2 is 2005 editions 100 yuans of crown word number region；
Fig. 3 is the binary image of crown word number region shown in Fig. 2；
Fig. 4 is the row cutting image of binary image shown in Fig. 3；
Fig. 5 is the preset crown word number cutting board of row cutting image shown in Fig. 4；
Fig. 6 is the number figure that column cutting board shown in Fig. 5 pass through the pixel that gray value is 1；
Fig. 7 is the left cutting drawing of row cutting image shown in Fig. 4；
Fig. 8 is the column cutting drawing of row cutting image shown in Fig. 4；
Fig. 9 is the composition schematic diagram of the cutter device of crown word number provided by Embodiment 2 of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment one:
Fig. 1 shows the implementation process of the cutting method of the crown word number of the offer of the embodiment of the present invention one, the implementation process
Details are as follows:
In step s101, the crown word number region of bank note is obtained；
In embodiments of the present invention, the bank note is intercepted in the grayscale image of the bank note of longitudinal 150DPI, transverse direction 200DPI
Crown word number region, wherein the longitudinal direction 150DPI, transverse direction 200DPI refer to that resolution ratio is 150*200DPI, i.e. resolution ratio is
150*200 pixel of per inch.The crown word number area size intercepted from the grayscale image of the bank note can be 60*270, i.e.,
Longitudinal is 60 pixels, is laterally 270 pixels.If Fig. 2 is 2005 editions 100 yuans of crown word number region.
In step s 102, binary conversion treatment is carried out to the crown word number region of the bank note, to obtain the hat of the bank note
The binary image in font size region；
In embodiments of the present invention, binary conversion treatment is carried out to the crown word number region of the bank note, can remove the bank note
Crown word number region ambient noise, and then improve the picture quality in the crown word number region of the bank note and the standard of crown word number cutting
True rate.
Further, the crown word number region progress binary conversion treatment to the bank note includes:
The grey level histogram in the crown word number region of the bank note is obtained, and counts total picture in the crown word number region of the bank note
Vegetarian refreshments number；
In embodiments of the present invention, the grey level histogram is grey value profile in the crown word number region to the bank note
Statistics indicates the pixel number in the crown word number region of the bank note with certain gray value.
Gray scale stretching is carried out to the grey level histogram, the gray scale of pixel in the crown word number region to stretch the bank note
Value；
In embodiments of the present invention, it is described to the grey level histogram carry out gray scale stretching be will be in the grey level histogram
The range of gray value is stretched to (0,255), i.e., stretches the range of the gray value of pixel in the crown word number region of the bank note
To (0,255), and the total pixel number for stretching the crown word number region of the front and back bank note is constant.Institute can be expanded by gray scale stretching
The dynamic range for stating the gray value in the crown word number region of bank note improves the picture quality in the crown word number region of the bank note, improves
The accuracy rate of crown word number cutting.
The gray value of all pixels point in the crown word number region of bank note after stretching is added up, and will it is cumulative after value
Divided by total pixel number in the crown word number region of the bank note, own in the crown word number region to obtain the bank note after the stretching
The average value of the gray value of pixel is used as binarization threshold for M times of the average value, and the M is greater than zero；
It is preferred that it is empirical value that M, which is 0.4375, described 0.4375,.
Gray value in the crown word number region of bank note after the stretching is less than to the ash of the pixel of the binarization threshold
Angle value is set as 1, and gray value is set as 0 not less than the gray value of the pixel of the binarization threshold.
In embodiments of the present invention, gray value in the crown word number region of the bank note after the stretching is less than the binaryzation
The gray value of the pixel of threshold value is set as 1, i.e., crown word number is shown as white in the crown word number region of the bank note after the stretching
Point, gray value are set as 0, the i.e. hat of the bank note after the stretching not less than the gray value of the pixel of the binarization threshold
Background is shown as black in font size region, and in the positional dissection algorithm of crown word number using (0-1) distribution two-dimensional matrix into
Row operation can reduce the complexity of operation, reduce operation time.If Fig. 3 is the binary image of crown word number region shown in Fig. 2.
In step s 103, the binary image is scanned according to preset window, is preced with obtaining in the binary image
The row cutting position of font size；
In embodiments of the present invention, in order to guarantee to be cut into complete crown word number, the setting of preset window size with
The height of crown word number is related in bank note, such as 2005 editions 100 yuans, due to 2005 editions 100 yuans of crown word numbers
Height is about 20~22 pixels, then the preset window can be sized to 23*270, i.e., longitudinal is 23 pictures
Vegetarian refreshments, the pixel of lateral position 270.
Further, the row cutting position includes upper cutting position and lower cutting position；
It is described that the binary image is scanned according to preset window, it is cut with obtaining the row of crown word number in the binary image
Cutting position includes:
Scan the binary image according to the preset window, with obtain crown word number in the binary image on cut
Cut position；
By the upper cutting position, corresponding line number is added with default crown word number height in the binary image, and really
Fixed value after being added be crown word number in the binary image lower cutting position in the binary image corresponding line number.
In order to better understand the present invention, it is illustrated with 2005 editions 100 yuans, due to 2005 editions 100 yuan
The height of the crown word number of RMB is about 20~22 pixels, described in order to guarantee to be cut into complete crown word number
Default crown word number height can be 23 pixels, such as 20th row of the upper cutting position in the binary image, then
Determine in the binary image cutting position under the 43rd behavior.
Further, described that the binary image is scanned according to the preset window, to obtain the binary image
The upper cutting position of middle crown word number includes:
The preset window is overlayed and carries out first time scanning on the binary image, it is last in the preset window
One-row pixels point is corresponding with last line pixel position in the binary image；
It in embodiments of the present invention, will be last in last line pixel in the preset window and the binary image
One-row pixels point position is corresponding, i.e., first pixel overlays the two-value in last line pixel in the described preset window
In change image in last line pixel on first pixel, second picture in last line pixel in the preset window
Vegetarian refreshments overlays in the binary image in last line pixel on second pixel point, last in the preset window
Third pixel overlays in the binary image in last line pixel on third pixel in row pixel, with
This analogizes, until having traversed last line all pixels point in the preset window.
Statistics stacks the picture that gray value is 1 in the region of the preset window in the binary image when scanning for the first time
Vegetarian refreshments number, which is the first pixel number, if first pixel number is not less than presetted pixel point threshold value, by institute
The first pixel number is stated as the first pixel threshold value, and determines the region for stacking the preset window in the binary image
In position of the first row pixel in the binary image be initial row position；
In embodiments of the present invention, the region for stacking the preset window when scanning for the first time in the binary image is
First subgraph counts the pixel number that gray value is 1 in the first subgraph, which is the first pixel number, if described the
One pixel number is not less than presetted pixel point threshold value, then using first pixel number as the first pixel threshold value, and determines
Position of the first row pixel in the binary image in first subgraph is initial row position.
It is preferred that the presetted pixel point threshold value is 0.
Second is carried out on the binary image with the mobile preset window of certain step-length to scan, and by
It is subtracted in first pixel number in the region for stacking the preset window when scanning for the first time in the binary image
The pixel number that gray value is 1 in last line pixel, in addition stacking institute in the binary image when scanning for second
The pixel number that gray value is 1 in the first row pixel in the region of preset window is stated, the second pixel number is calculated；
In embodiments of the present invention, it is moved up on the binary image using a pixel as step-length described default
Window carries out second and scans, and second of region for stacking the preset window when scanning in the binary image is the second son
Figure, by subtracting the picture that gray value is 1 in the last line pixel in first subgraph in first pixel number
Vegetarian refreshments number, in addition the pixel number that gray value is 1 in the first row pixel in second subgraph, is calculated the second picture
Vegetarian refreshments number relates only to plus and minus calculation during calculating the second pixel number, and operation is simple, and calculating speed is fast.
If second pixel number is less than the first pixel threshold value, it is determined that starting line position when scanning for the first time
It is set to the upper cutting position of crown word number in the binary image.
Further, described that the binary image is scanned according to the preset window, to obtain the binary image
The upper cutting position of middle crown word number further include:
If second pixel number is not less than the first pixel threshold value, using second pixel number as the
Two pixel threshold values, and determine the first row pixel in the region for stacking the preset window in the binary image in institute
Stating the position in binary image is initial row position；
It in embodiments of the present invention, will be described if second pixel number is not less than the first pixel threshold value
Second pixel number determines the first row pixel in second subgraph in the binaryzation as the second pixel threshold value
Position in image is initial row position.
Third time scanning is carried out with the mobile preset window of certain step-length on the binary image, and by
In the region for stacking the preset window when subtracting second of scanning in second pixel number in the binary image
The pixel number that gray value is 1 in last line pixel, in addition stacking institute in the binary image when third time scans
The pixel number that gray value is 1 in the first row pixel in the region of preset window is stated, third pixel number is calculated；
If the third pixel number is not less than the second pixel threshold value, and so on, it is scanned until the N+1 times
When N+1 pixel number less than N pixel threshold value, and determine that initial row position when n-th scanning is the binaryzation
The upper cutting position of crown word number in image, the N are the integer greater than zero.
In embodiments of the present invention, it is moved up on the binary image using a pixel as step-length described default
Window carries out third time scanning, and third time stacks the preset window in binary image region when scanning is third
Figure, by subtracting the picture that gray value is 1 in the last line pixel in second subgraph in second pixel number
Vegetarian refreshments number, in addition the pixel number that gray value is 1 in the first row pixel in the third subgraph, is calculated third picture
Vegetarian refreshments number；If the third pixel number is not less than second pixel number, with a picture on the binary image
Vegetarian refreshments is that step-length continues to move up the preset window and carries out the 4th scanning, in when the 4th scanning binary image
The region for stacking the preset window is the 4th subgraph, by subtracting in the third subgraph in the third pixel number
The pixel number that gray value is 1 in last line pixel, in addition the gray scale in the first row pixel in the 4th subgraph
The pixel number that value is 1, is calculated the 4th pixel number, if the 4th pixel number is not less than the third pixel
Number, then and so on, N+1 pixel number when the N+1 times scanning determines that n-th is swept less than N pixel threshold value
Initial row position when retouching is the upper cutting position of crown word number in the binary image.
N+1 pixel number and n-th pixel threshold when in embodiments of the present invention, by comparing the N+1 times scanning
Value determines the upper cutting position of crown word number, and the N+1 pixel number is the pixel number that gray value is 1 in N+1 subgraph,
If there are stains in crown word number region, stain is generally all smaller, smaller on the statistics influence of pixel number when scanning, can keep away
Exempt from the problem of stain being mistaken for crown word number, location of mistake crown word number occur, improves the accuracy rate of crown word number cutting.
In step S104, the binary image is cut according to the row cutting position, to obtain the binary picture
The row cutting image of picture；
In embodiments of the present invention, according to the upper cutting position of crown word number in the binary image and lower cutting position,
The binary image is cut, to obtain the row cutting image of the binary image.If Fig. 4 is binary image shown in Fig. 3
Row cutting image.
In step s105, according to the row cutting image and preset crown word number column cutting board, determine that the row is cut
Cut the column cutting position of crown word number in image；
In embodiments of the present invention, the crown word number column cutting board of the bank note of different values of money is different, can be by replacing not
Preset crown word number with the bank note of value of money cuts version, positions the column cutting position of the bank note of different values of money, scalability is strong.
Further, the column cutting position includes left cutting position and right cutting position；
It is described according to the row cutting image and preset crown word number column cutting board, determine and be preced in the row cutting image
The column cutting position of font size includes:
According to the row cutting image and the preset crown word number column cutting board, determines and be preced in the row cutting image
The left cutting position of font size；
By the left cutting position, corresponding columns is added with default crown word number width in the row cutting image, and really
Fixed value after being added be crown word number in the row cutting image right cutting position in the row cutting image corresponding columns.
In order to better understand the present invention, it is illustrated with 2005 editions 100 yuans, the row cutting image
Having a size of 23*270, since 2005 editions 100 yuans of single crown word number width are about 20 pixels, in order to guarantee
It is enough cut into complete crown word number, the default crown word number width can be 20 pixels, if the left cutting position is in institute
State the 20th column in row cutting image, it is determined that the 40th is classified as right cutting position in the row cutting image.
Further, the preset crown word number column cutting board includes P column cutting board, and the P is greater than zero
Integer；
In embodiments of the present invention, in order to guarantee to be cut into complete crown word number, preset crown word number column blanking punch
In plate between the size and P column cutting board of P column cutting board in the setting of spacing and bank note single crown word number width
Related, P column cutting board is the fixed column pixel of pixel number.For example, 2005 editions 100 yuans of preset hat
Font size column cutting board size can be 23*232, if Fig. 5 is the preset crown word number blanking punch of row cutting image shown in Fig. 4
Plate, the template include 11 column cutting boards, each column cutting board is having a size of 23*1, and number is 11 column in Fig. 5
The label of cutting board, the corresponding line segment of each label are a column cutting board, and label 2 and 1 spacing of label are 22 in Fig. 5
Pixel, label 3 and 1 spacing of label are 45 pixels, and label 4 and 1 spacing of label are 68 pixels, label 5 and label 1
Spacing is 92 pixels, and label 6 and 1 spacing of label are 116 pixels, and label 7 and 1 spacing of label are 140 pixels,
Label 8 and 1 spacing of label are 164 pixels, and label 9 and 1 spacing of label are 187 pixels, label 10 and 1 spacing of label
For 210 pixels, label 11 and 1 spacing of label are 232 pixels.
It is described according to the row cutting image and the preset crown word number column cutting board, determine the row cutting image
The left cutting position of middle crown word number includes:
The preset crown word number column cutting board is overlayed on the row cutting image, the preset crown word number column
First column cutting board is corresponding with first row pixel position in the row cutting image in cutting board, and cuts in the row
It cuts on image with the mobile preset crown word number column cutting board of certain step-length；
In embodiments of the present invention, the preset crown word number column cutting board is overlayed on the row cutting image and is
It is mobile for the first time.First column cutting board and in the row cutting image first in the preset crown word number column cutting board
Column pixel position is corresponding, i.e., first pixel in first column cutting board in the described preset crown word number column cutting board
It overlays on first pixel of first row pixel in the row cutting image, the preset crown word number column cutting board
In in first column cutting board second pixel point overlay second picture of first row pixel in the row cutting image
On vegetarian refreshments, third pixel overlays the row in first column cutting board in the preset crown word number column cutting board
In cutting image on the third pixel of first row pixel, and so on, until having traversed the preset crown word number column
All pixels point in first row cutting board in cutting board.
When moving the preset crown word number column cutting board every time, statistics and the preset crown word number column blanking punch
The pixel number and the preset crown word number that gray value is 1 in the corresponding row cutting image in column cutting board position in plate
Column cutting board passes through the number for the pixel that the gray value is 1 in column cutting board, and will the described and preset prefix
The pixel number that gray value is 1 in the corresponding row cutting image in column cutting board position in number column cutting board with it is described pre-
If crown word number column cutting board in column cutting board pass through the gray value be 1 pixel number be multiplied, after multiplication
Value cuts score as total, and so on, it is moved until by the P column cutting board in the preset crown word number column cutting board
To the position of last column pixel in the row cutting image；
In embodiments of the present invention, it moves right on the row cutting image using a pixel as step-length described default
Crown word number column cutting board, when first time is mobile, statistics and column blanking punch in the preset crown word number column cutting board
In the pixel number and the preset crown word number column cutting board that gray value is 1 in the corresponding row cutting image of Board position
Column cutting board passes through the number for the pixel that the gray value is 1, and using the product of the two as total cutting score；It moves right
One pixel is mobile for second, and calculates total cutting score when second of movement；Moving a pixel again to the right is
Third time is mobile, and calculates total cutting score when third time movement；And so on, it is moved to until by the P column cutting board
The position of last column pixel in the row cutting image.As Fig. 6 be column cutting board shown in Fig. 5 pass through gray value be 1
The number figure of pixel, it is 6, Fig. 6 that column cutting board, which passes through the number for the pixel that gray value is 1 in crown word number 6, as shown in Figure 6
Middle label 1 indicates to pass through for the first time, and the expression of label 2 is passed through for the second time, and label 3 indicates that third time is passed through, and label 4 indicates the 4th time
It passes through, label 5 indicates to pass through for the 5th time, and label 6 indicates to pass through for the 6th time.
Minimum total cutting score is selected from total cutting score, and determines that minimum total cutting score is corresponding
The preset crown word number column cutting board is crown word number in the row cutting image in the position on the row cutting image
Left cutting position.
In embodiments of the present invention, by selecting minimum total cutting score from total cutting score, determine described in
The left cutting position of crown word number in row cutting image, if there are stains in crown word number region, stain is generally all smaller, to from
It is smaller that minimum total cutting score influence is selected in total cutting score, can avoid occurring stain being mistaken for crown word number, it is wrong
Accidentally the problem of positioning crown word number, the accuracy rate of crown word number cutting is improved.
Further, statistics institute corresponding with column cutting board position in the preset crown word number column cutting board
Column cutting board in the pixel number and the preset crown word number column cutting board that gray value is 1 in row cutting image is stated to pass through
The number for the pixel that the gray value is 1, and column cutting board position by described in and in the preset crown word number column cutting board
It sets to arrange in the pixel number and the preset crown word number column cutting board that gray value is 1 in the corresponding row cutting image and cut
The number multiplication that template passes through the pixel that the gray value is 1 is cut, includes: using the value after multiplication as total cutting score
The row corresponding with first column cutting board position in the preset crown word number column cutting board is counted to cut
First column cutting board in the pixel number and the preset crown word number column cutting board that gray value is 1 in image is cut to pass through
The number for the pixel that the gray value is 1, and described will be cut with first column in the preset crown word number column cutting board
The pixel number and the preset crown word number column cutting board that gray value is 1 in the corresponding row cutting image of template position
In first column cutting board pass through the gray value be 1 pixel number be multiplied, using the value after multiplication as first cutting
Score；
The row corresponding with second column cutting board position in the preset crown word number column cutting board is counted to cut
Second column cutting board in the pixel number and the preset crown word number column cutting board that gray value is 1 in image is cut to pass through
The number for the pixel that the gray value is 1, and described will be cut with second column in the preset crown word number column cutting board
The pixel number and the preset crown word number column cutting board that gray value is 1 in the corresponding row cutting image of template position
In second column cutting board pass through the gray value be 1 pixel number be multiplied, using the value after multiplication as second cutting
Score；
And so on, it is cut until having traversed the P column cutting board, and by corresponding P of the P column cutting board
It cuts score to add up, the value after adding up is as total cutting score.
In embodiments of the present invention, the column picture that first column cutting board is stacked in the row cutting image is counted
Gray value is 1 in vegetarian refreshments pixel number and first column cutting board pass through the number for the pixel that the gray value is 1,
And using the product of the two as the first cutting score；It counts and stacks second column cutting board in the row cutting image
The pixel number and second column cutting board that gray value is 1 in one column pixel pass through the pixel that the gray value is 1
Number, and using the product of the two as second cutting score；The third column blanking punch is stacked in the row cutting image
The pixel number and the third column cutting board that gray value is 1 in one column pixel of plate pass through the picture that the gray value is 1
The number of vegetarian refreshments, and score is cut using the product of the two as third；And so on, until having traversed the P column blanking punch
Plate.
In step s 106, according to the column cutting position, crown word number is cut into from the row cutting image.
In embodiments of the present invention, the row cutting image first can be cut according to the left cutting position, to obtain
The left cutting image for stating row cutting image cuts the left cutting image further according to the right cutting position, to obtain the left side
The right cutting image of cutting image is cut into each crown word number from the left cutting image.If Fig. 7 is row shown in Fig. 4
The left cutting drawing of cutting image, Fig. 8 are the column cutting drawings of row cutting image shown in Fig. 4, i.e., carry out to row cutting image shown in Fig. 4
The image after cutting with right cut is cut in left cut.
The embodiment of the present invention positions prefix by the binary image according to the crown word number region of preset window scanning paper currency
Number row cutting position, and according to row cutting position cut binary image, to obtain the row cutting image of binary image, root
According to row cutting image and preset crown word number column cutting board, the column cutting position of crown word number, is being preced in home row cutting image
In the positional dissection algorithm of font size, the profile of crown word number in the entire crown word number region without traversing bank note, operation is simple, calculates
The problem of speed is fast, and can avoid occurring for stain being mistaken for crown word number, location of mistake crown word number, improves the standard of crown word number cutting
True rate.
Embodiment two:
Fig. 9 shows the composition schematic diagram of the cutter device of crown word number provided by Embodiment 2 of the present invention, for the ease of saying
Bright, only parts related to embodiments of the present invention are shown, and details are as follows:
Module 91 is obtained, for obtaining the crown word number region of bank note；
Binarization block 92 carries out binary conversion treatment for the crown word number region to the bank note, to obtain the bank note
Crown word number region binary image；
Further, the binarization block 92 includes:
Acquisition submodule stretches submodule, cumulative submodule and setting submodule；
The acquisition submodule, the grey level histogram in the crown word number region for obtaining the bank note, and count the paper
Total pixel number in the crown word number region of coin；
The stretching submodule, for carrying out gray scale stretching to the grey level histogram, to stretch the prefix of the bank note
The gray value of pixel in number region；
The cumulative submodule, the gray value for all pixels point in the crown word number region of the bank note after stretching carry out
It is cumulative, and will it is cumulative after value divided by the bank note crown word number region total pixel number, to obtain the paper after the stretching
The average value of the gray value of all pixels point in the crown word number region of coin, is used as binarization threshold for M times of the average value, described
M is greater than zero；
The setting submodule is less than the two-value for gray value in the crown word number region by the bank note after the stretching
The gray value for changing the pixel of threshold value is set as 1, gray value setting of the gray value not less than the pixel of the binarization threshold
It is 0.
Scan module 93, for scanning the binary image according to preset window, to obtain in the binary image
The row cutting position of crown word number；
Further, the row cutting position includes upper cutting position and lower cutting position；
The scan module 93 includes:
It scans submodule 931 and determines submodule 932；
The scanning submodule 931, for scanning the binary image according to the preset window, to obtain described two
The upper cutting position of crown word number in value image；
The determining submodule 932, for will the upper cutting position in the binary image corresponding line number and
Default crown word number height is added, and determines that value after being added is the lower cutting position of crown word number in the binary image described
Corresponding line number in binary image.
Further, the scanning submodule 931 includes:
First scanning element, pixel number statistic unit, the second scanning element and the first determination unit；
First scanning element carries out sweeping for the first time on the binary image for overlaying the preset window
It retouches, last line pixel is corresponding with last line pixel position in the binary image in the preset window；
The pixel number statistic unit stacks described preset in the binary image when scanning for the first time for counting
The pixel number that gray value is 1 in the region of window, which is the first pixel number, if first pixel number is not
Less than presetted pixel point threshold value, then using first pixel number as the first pixel threshold value, and the binary picture is determined
Position of the first row pixel in the region of the preset window in the binary image is stacked as in as starting line position
It sets；
Second scanning element, on the binary image with the mobile preset window of certain step-length into
Institute is stacked in the binary image when going second and scan, and scanning for the first time by subtracting in first pixel number
The pixel number that gray value is 1 in the last line pixel in the region of preset window is stated, in addition in second of scanning when institute
State the pixel number that gray value is 1 in the first row pixel in the region for stacking the preset window in binary image, meter
Calculation obtains the second pixel number；
First determination unit, if being less than the first pixel threshold value for second pixel number, it is determined that
Initial row position when scanning for the first time is the upper cutting position of crown word number in the binary image.
Further, the scanning submodule 931 further include:
Second determination unit, third scanning element and third determination unit；
Second determination unit will if being not less than the first pixel threshold value for second pixel number
Second pixel number determines the area that the preset window is stacked in the binary image as the second pixel threshold value
Position of the first row pixel in the binary image in domain is initial row position；
The third scanning element, on the binary image with the mobile preset window of certain step-length into
Row third time scans, and stacks institute in by subtracting second of scanning in second pixel number when binary image
The pixel number that gray value is 1 in the last line pixel in the region of preset window is stated, in addition scanning when institute in third time
State the pixel number that gray value is 1 in the first row pixel in the region for stacking the preset window in binary image, meter
Calculation obtains third pixel number；
The third determination unit, if being not less than the second pixel threshold value for the third pixel number, with
This analogizes, and N+1 pixel number when the N+1 times scanning determines when n-th scans less than N pixel threshold value
Initial row position is the upper cutting position of crown word number in the binary image, and the N is the integer greater than zero.
First cutting module 94, for cutting the binary image according to the row cutting position, to obtain described two
The row cutting image of value image；
Determining module 95, for determining the row according to the row cutting image and preset crown word number column cutting board
The column cutting position of crown word number in cutting image；
Further, the column cutting position includes left cutting position and right cutting position；
The determining module 95 includes:
First determines that submodule 951 and second determines submodule 952；
Described first determines submodule 951, for according to the row cutting image and the preset crown word number column cutting
Template determines the left cutting position of crown word number in the row cutting image；
It is described second determine submodule 952, for by the left cutting position in the row cutting image corresponding column
Number is added with default crown word number width, and determines that value after being added is that the right cutting position of crown word number in the row cutting image exists
Corresponding columns in the row cutting image.
Further, the preset crown word number column cutting board includes P column cutting board, and the P is greater than zero
Integer；
Described first determines that submodule 951 includes:
Stack unit, statistic unit and selection unit；
It is described to stack unit, for the preset crown word number column cutting board to be overlayed the row cutting image,
First column cutting board and first row pixel point in the row cutting image in the preset crown word number column cutting board
Correspondence is set, and with the mobile preset crown word number column cutting board of certain step-length on the row cutting image；
The statistic unit, for when moving the preset crown word number column cutting board every time, statistics with it is described pre-
If crown word number column cutting board in gray value is 1 in the corresponding row cutting image in column cutting board position pixel number
The number for the pixel that the gray value is 1 is passed through with column cutting board in the preset crown word number column cutting board, and by institute
Stating gray value in the row cutting image corresponding with column cutting board position in the preset crown word number column cutting board is 1
Pixel number and the preset crown word number column cutting board in column cutting board pass through the gray value be 1 pixel time
Number is multiplied, using the value after multiplication as always cutting score, and so on, until will be in the preset crown word number column cutting board
The P column cutting board moves to the position of last column pixel in the row cutting image；
The selection unit, for selecting minimum total cutting score from total cutting score, and determine it is described most
Small total position for cutting the corresponding preset crown word number column cutting board of score on the row cutting image is the row
The left cutting position of crown word number in cutting image.
Further, the statistic unit includes:
First statistics subelement, the second statistics subelement and cumulative subelement；
The first statistics subelement is cut for counting with first column in the preset crown word number column cutting board
The pixel number and the preset crown word number column cutting board that gray value is 1 in the corresponding row cutting image of template position
In first column cutting board pass through the number for the pixel that the gray value is 1, and described will be arranged with the preset crown word number
In cutting board in the corresponding row cutting image in first column cutting board position gray value be 1 pixel number with it is described
The number that first column cutting board passes through the pixel that the gray value is 1 in preset crown word number column cutting board is multiplied, will
Value after multiplication is as the first cutting score；
The second statistics subelement is cut for counting with second column in the preset crown word number column cutting board
The pixel number and the preset crown word number column cutting board that gray value is 1 in the corresponding row cutting image of template position
In second column cutting board pass through the number for the pixel that the gray value is 1, and described will be arranged with the preset crown word number
In cutting board in the corresponding row cutting image in second column cutting board position gray value be 1 pixel number with it is described
The number that second column cutting board passes through the pixel that the gray value is 1 in preset crown word number column cutting board is multiplied, will
Value after multiplication is as the second cutting score；
The cumulative subelement, for and so on, it is arranged until having traversed the P column cutting board, and by described P
The corresponding P cutting score of cutting board adds up, and the value after adding up is as total cutting score.
Second cutting module 96, for being cut into crown word number from the row cutting image according to the column cutting position.
The cutter device of crown word number provided in an embodiment of the present invention can be used in aforementioned corresponding embodiment of the method one,
Details are referring to the description of above-described embodiment one, and details are not described herein.
The technical staff in the field can be understood that, for convenience and simplicity of description, only with above-mentioned each function
The division progress of module can according to need and for example, in practical application by above-mentioned function distribution by different function moulds
Block is completed, i.e. the internal structure of described device is divided into different functional modules, and above-mentioned functional module both can be using hardware
Form is realized, can also be realized in the form of software.In addition, the specific name of each functional module is also only to facilitate mutually
Difference, the protection scope being not intended to limit this application.
In conclusion binary image of the embodiment of the present invention according to the crown word number region of preset window scanning paper currency, fixed
The row cutting position of position crown word number, and binary image is cut according to row cutting position, to obtain the row cutting of binary image
Image, according to row cutting image and preset crown word number column cutting board, the column cleavage of crown word number in home row cutting image
It sets, in the positional dissection algorithm of crown word number, the profile of crown word number in the entire crown word number region without traversing bank note, operation letter
The problem of single, calculating speed is fast, and can avoid occurring for stain being mistaken for crown word number, location of mistake crown word number, improves crown word number
The accuracy rate of cutting.
Those of ordinary skill in the art be further appreciated that implement the method for the above embodiments be can
It is completed with instructing relevant hardware by program, the program can be stored in a computer-readable storage medium
In, described storage medium, including ROM/RAM, disk, CD etc..
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of cutting method of crown word number, which is characterized in that the described method includes:
Obtain the crown word number region of bank note；
Binary conversion treatment is carried out to the crown word number region of the bank note, to obtain the binary picture in the crown word number region of the bank note
Picture；
The binary image is scanned according to preset window, to obtain the row cutting position of crown word number in the binary image；
The binary image is cut according to the row cutting position, to obtain the row cutting image of the binary image；
According to the row cutting image and preset crown word number column cutting board, the column of crown word number in the row cutting image are determined
Cutting position, specifically: the preset crown word number column cutting board includes P column cutting board, and the P is whole greater than zero
Number；The column cutting position includes left cutting position and right cutting position；The preset crown word number column cutting board is stacked
On the row cutting image, first column cutting board and the row cutting drawing in the preset crown word number column cutting board
First row pixel position is corresponding as in, and with the mobile preset crown word number of the step-length of setting on the row cutting image
Column cutting board, when moving the preset crown word number column cutting board every time, statistics is cut with the preset crown word number column
Cut the pixel number and the preset hat that gray value is 1 in the corresponding row cutting image in column cutting board position in template
Column cutting board passes through the number for the pixel that the gray value is 1 in font size column cutting board, and will it is described with it is described preset
Pixel number and institute of the gray value for 1 in the corresponding row cutting image in column cutting board position in crown word number column cutting board
The number multiplication that column cutting board in preset crown word number column cutting board passes through the pixel that the gray value is 1 is stated, will be multiplied
Value afterwards is as total cutting score, until the P column cutting board in the preset crown word number column cutting board is moved to institute
The position for stating last column pixel in row cutting image selects minimum total cutting score from total cutting score, and
Determine minimum total position for cutting the corresponding preset crown word number column cutting board of score on the row cutting image
It is set to the left cutting position of crown word number in the row cutting image；The left cutting position is corresponding in the row cutting image
Columns be added with default crown word number width, and determine it is after being added value be the row cutting image in crown word number right cleavage
Set the corresponding columns in the row cutting image；
According to the column cutting position, crown word number is cut into from the row cutting image.
2. the method according to claim 1, wherein the row cutting position includes upper cutting position and lower cutting
Position；
It is described that the binary image is scanned according to preset window, to obtain the row cleavage of crown word number in the binary image
It sets and includes:
The binary image is scanned according to the preset window, to obtain the upper cleavage of crown word number in the binary image
It sets；
By the upper cutting position, corresponding line number is added with default crown word number height in the binary image, and determines phase
Value after adding be crown word number in the binary image lower cutting position in the binary image corresponding line number.
3. according to the method described in claim 2, it is characterized in that, described scan the binary picture according to the preset window
Picture includes: to obtain the upper cutting position of crown word number in the binary image
The preset window is overlayed into progress first time scanning on the binary image, last line in the preset window
Pixel is corresponding with last line pixel position in the binary image；
Statistics stacks the pixel that gray value is 1 in the region of the preset window in the binary image when scanning for the first time
Number, which is the first pixel number, if first pixel number is not less than presetted pixel point threshold value, by described the
One pixel number determines in the region for stacking the preset window in the binary image as the first pixel threshold value
Position of the first row pixel in the binary image is initial row position；
It carries out second on the binary image with the mobile preset window of certain step-length to scan, and by described
It is subtracted in first pixel number last in the region for stacking the preset window when scanning for the first time in the binary image
The pixel number that gray value is 1 in one-row pixels point, in addition being stacked in the binary image when scanning for second described pre-
If the pixel number that gray value is 1 in the first row pixel in the region of window, is calculated the second pixel number；
If second pixel number is less than the first pixel threshold value, it is determined that initial row position when scanning for the first time is
The upper cutting position of crown word number in the binary image.
4. according to the method described in claim 3, it is characterized in that, described scan the binary picture according to the preset window
Picture, to obtain the upper cutting position of crown word number in the binary image further include:
If second pixel number is not less than the first pixel threshold value, using second pixel number as the second picture
Vegetarian refreshments threshold value, and determine the first row pixel in the region for stacking the preset window in the binary image described two
Position in value image is initial row position；
Third time scanning is carried out with the mobile preset window of certain step-length on the binary image, and by described
It is stacked in the binary image when subtracting second of scanning in the second pixel number last in the region of the preset window
The pixel number that gray value is 1 in one-row pixels point, in addition being stacked in the binary image when third time scans described pre-
If the pixel number that gray value is 1 in the first row pixel in the region of window, is calculated third pixel number；
If the third pixel number is not less than the second pixel threshold value, and so on, when the N+1 times scanning
N+1 pixel number determines that initial row position when n-th scanning is the binary image less than N pixel threshold value
The upper cutting position of middle crown word number, the N are the integer greater than zero.
5. a kind of cutter device of crown word number, which is characterized in that described device includes:
Obtain module, binarization block, scan module, the first cutting module, determining module and the second cutting module；
The acquisition module, for obtaining the crown word number region of bank note；
The binarization block carries out binary conversion treatment for the crown word number region to the bank note, to obtain the bank note
The binary image in crown word number region；
The scan module is preced with for scanning the binary image according to preset window with obtaining in the binary image
The row cutting position of font size；
First cutting module, for cutting the binary image according to the row cutting position, to obtain the two-value
Change the row cutting image of image；
The determining module, for determining that the row is cut according to the row cutting image and preset crown word number column cutting board
Cut the column cutting position of crown word number in image；The preset crown word number column cutting board includes P column cutting board, the P
For the integer greater than zero；The column cutting position includes left cutting position and right cutting position；
The determining module includes:
First determines that submodule and second determines submodule；
Described first determines submodule, is used for according to the row cutting image and the preset crown word number column cutting board, really
The left cutting position of crown word number in the fixed row cutting image, comprising: described first determines that submodule includes: to stack unit, system
Count unit and selection unit；It is described to stack unit, for the preset crown word number column cutting board to be overlayed the row
On cutting image, first column cutting board and in the row cutting image first in the preset crown word number column cutting board
Column pixel position is corresponding, and with the mobile preset crown word number column blanking punch of the step-length of setting on the row cutting image
Plate；The statistic unit, for counting and the preset hat when moving the preset crown word number column cutting board every time
Gray value is 1 pixel number and described in the corresponding row cutting image in column cutting board position in font size column cutting board
Column cutting board passes through the number for the pixel that the gray value is 1 in preset crown word number column cutting board, and will described and institute
State the pixel that gray value is 1 in the corresponding row cutting image in column cutting board position in preset crown word number column cutting board
It counts and passes through the number phase for the pixel that the gray value is 1 with column cutting board in the preset crown word number column cutting board
Multiply, using the value after multiplication as total cutting score, and so on, until by P in the preset crown word number column cutting board
A column cutting board moves to the position of last column pixel in the row cutting image；The selection unit is used for from described
The total cutting score of minimum is selected in total cutting score, and determines the corresponding preset prefix of the minimum always cutting score
Number column cutting board is the left cutting position of crown word number in the row cutting image in the position on the row cutting image；
Described second determines submodule, for by the left cutting position in the row cutting image corresponding columns and default
Crown word number width is added, and determines that value after being added is that the right cutting position of crown word number in the row cutting image is cut in the row
Cut corresponding columns in image；
Second cutting module, for being cut into crown word number from the row cutting image according to the column cutting position.
6. device according to claim 5, which is characterized in that the row cutting position includes upper cutting position and lower cutting
Position；
The scan module includes:
It scans submodule and determines submodule；
The scanning submodule, for scanning the binary image according to the preset window, to obtain the binary picture
The upper cutting position of crown word number as in；
The determining submodule, for will the upper cutting position corresponding line number and default prefix in the binary image
Number height be added, and determine it is after being added value be the binary image in crown word number lower cutting position in the binary picture
The corresponding line number as in.
7. device according to claim 6, which is characterized in that the scanning submodule includes:
First scanning element, pixel number statistic unit, the second scanning element and the first determination unit；
First scanning element, for the preset window to be overlayed progress first time scanning on the binary image,
Last line pixel is corresponding with last line pixel position in the binary image in the preset window；
The pixel number statistic unit stacks the preset window in the binary image when scanning for the first time for counting
Region in gray value be 1 pixel number, the pixel number be the first pixel number, if first pixel number is not less than
Presetted pixel point threshold value then using first pixel number as the first pixel threshold value, and determines in the binary image
Stacking position of the first row pixel in the binary image in the region of the preset window is initial row position；
Second scanning element, for carrying out the on the binary image with the mobile preset window of certain step-length
Rescan, and stack in the binary image when being scanned for the first time by being subtracted in first pixel number described pre-
If the pixel number that gray value is 1 in the last line pixel in the region of window, in addition two described in when scanning for second
The pixel number that gray value is 1 in the first row pixel in the region of the preset window is stacked in value image, is calculated
To the second pixel number；
First determination unit, if being less than the first pixel threshold value for second pixel number, it is determined that first
Initial row position when secondary scanning is the upper cutting position of crown word number in the binary image.
8. device according to claim 7, which is characterized in that the scanning submodule further include:
Second determination unit, third scanning element and third determination unit；
Second determination unit will be described if being not less than the first pixel threshold value for second pixel number
Second pixel number determines in the region for stacking the preset window in the binary image as the second pixel threshold value
Position of the first row pixel in the binary image be initial row position；
The third scanning element, for carrying out the on the binary image with the mobile preset window of certain step-length
It scans, and is stacked in by subtracting second of scanning in second pixel number when binary image described pre- three times
If the pixel number that gray value is 1 in the last line pixel in the region of window, in addition two described in when third time scans
The pixel number that gray value is 1 in the first row pixel in the region of the preset window is stacked in value image, is calculated
To third pixel number；
The third determination unit, if being not less than the second pixel threshold value for the third pixel number, with such
It pushes away, N+1 pixel number when the N+1 times scanning determines starting when n-th scanning less than N pixel threshold value
Line position is set to the upper cutting position of crown word number in the binary image, and the N is the integer greater than zero.
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| CN108734161B (en) * | 2017-04-13 | 2022-01-25 | 深圳怡化电脑股份有限公司 | Method, device and equipment for identifying prefix number area and storage medium |
| CN108734848A (en) * | 2017-04-21 | 2018-11-02 | 深圳怡化电脑股份有限公司 | Recognition methods, device and the automatic depositing-withdrawing equipment of paper money number |
| CN108734846B (en) * | 2017-04-25 | 2021-02-02 | 深圳怡化电脑股份有限公司 | Method and device for denoising paper money image, terminal and storage medium |
| CN107085849B (en) * | 2017-05-17 | 2020-05-01 | 深圳怡化电脑股份有限公司 | Image binarization processing method, device, equipment and storage medium |
| CN109697443B (en) * | 2017-10-23 | 2022-10-11 | 深圳怡化电脑股份有限公司 | Paper money serial number segmentation method and device |
| CN108510636B (en) * | 2018-03-27 | 2020-01-14 | 深圳怡化电脑股份有限公司 | Image segmentation method, image segmentation device and terminal equipment |
| CN110895849A (en) * | 2018-09-13 | 2020-03-20 | 深圳怡化电脑股份有限公司 | Method and device for cutting and positioning crown word number, computer equipment and storage medium |
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