CN107527422B - A kind of offset printing is to print detection method, device, terminal device and readable storage medium storing program for executing - Google Patents
A kind of offset printing is to print detection method, device, terminal device and readable storage medium storing program for executing Download PDFInfo
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- CN107527422B CN107527422B CN201710532785.0A CN201710532785A CN107527422B CN 107527422 B CN107527422 B CN 107527422B CN 201710532785 A CN201710532785 A CN 201710532785A CN 107527422 B CN107527422 B CN 107527422B
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/20—Testing patterns thereon
- G07D7/2016—Testing patterns thereon using feature extraction, e.g. segmentation, edge detection or Hough-transformation
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/20—Testing patterns thereon
- G07D7/2008—Testing patterns thereon using pre-processing, e.g. de-blurring, averaging, normalisation or rotation
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- Engineering & Computer Science (AREA)
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Abstract
The invention belongs to financial machine and tool fields more particularly to a kind of offset printing to print detection method, device, terminal device and readable storage medium storing program for executing.The obverse and reverse reflected image of the method acquisition target bank note, and offset printing therein is extracted respectively to being patterned, by one of offset printing to be patterned carry out flip horizontal after, the edge contour pixel group of the two is extracted respectively and calculates the number of coincident pixel point, if the number of the coincident pixel point is fallen into preset numberical range, then determine that the offset printing of the target bank note is normal to printing, if the number of the coincident pixel point exceeds the numberical range, determine that the offset printing of the target bank note is abnormal to print.Print is detected by the invention it is possible to carry out effective offset printing merely with reflectogram acquired in existing detection device, saves the cost for carrying out upgrading to existing equipment.
Description
Technical field
The invention belongs to financial machine and tool field more particularly to a kind of offset printings to print detection method, device, terminal device and can
Read storage medium.
Background technique
Paper money recognition is one of the basic function of all kinds of ATM machine, and cardinal principle is to utilize the various marks being arranged on bank note
Know the true and false to judge bank note, is come into the market with anti-forge coin, influence normal financial order.
Offset printing is a kind of important anti-counterfeiting technology on bank note to being patterned, it is characterized in that being respectively printed on a part of figure in front and back sides
Case, translumination observation can find that the pattern of two sides fitted together perfectly combines.Offset printing is to being patterned on the bank note of various regions all
There are the flying horse figure in utilization, such as Hongkong dollar and the Diagram of the Supreme Ultimate on South Korean Won.This anti-counterfeiting characteristic is also added in RMB since 2005 editions:
There are a round local pattern, translumination observation in middle on the right side of main scape pattern, and front pattern is combined into a complete ancient money
Pattern.And the newest 2015 editions 100 yuan corresponding patterns for being then changed to " 100 " printed words.
Offset printing only could be observed obviously in transmitted light to being patterned, and current detection device can only generally obtain paper
The reflectogram of coin then needs to carry out upgrading to existing equipment, increases additional identification cost to obtain transmission plot.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of offset printings to print detection method, device, terminal device and readable to deposit
Storage media need to carry out existing equipment when solving in the prior art to detect print to carry out offset printing by obtaining transmission plot
Upgrading, the problem of increasing additional identification cost.
The first aspect of the embodiment of the present invention provides a kind of offset printing to print detection method, may include:
The head-on reflection image and backside reflection image of target bank note are obtained respectively；
The first offset printing in the head-on reflection image is extracted to being patterned；
The second offset printing in the backside reflection image is extracted to being patterned；
To first offset printing to being patterned with second offset printing to one of carry out flip horizontal in being patterned,
Third offset printing is obtained to being patterned, another is remained unchanged, and is denoted as the 4th offset printing to being patterned；
The third offset printing is extracted respectively to the first edge contour pixel group and the 4th offset printing that are patterned to impression
The second edge contour pixel group of case；
Calculate the number of the coincident pixel point of the first edge contour pixel group and the second edge contour pixel group；
If the number of the coincident pixel point is fallen into preset numberical range, the offset printing pair of the target bank note is determined
Print is normal；
If the number of the coincident pixel point exceeds the numberical range, determine that the offset printing of the target bank note is different to printing
Often.
Further, first offset printing extracted in the head-on reflection image may include: to being patterned
Estimate first offset printing to the target area being patterned in the head-on reflection image, institute according to predeterminated position
Stating predeterminated position is first offset printing to the position being patterned in standard bank note corresponding with the target bank note；
Binary conversion treatment is carried out to the image in the target area, obtains target area bianry image；
Go out first offset printing to being patterned in institute according to the pixel grey scale Distribution and localization of the target area bianry image
State the first position in head-on reflection image；
First offset printing is extracted to being patterned according to the first position.
Further, estimated first offset printing to being patterned in the head-on reflection image according to predeterminated position
Before target area, can also include:
Binary conversion treatment is carried out to the head-on reflection image of the target bank note, obtains target bank note bianry image；
The corresponding pixel points of the target bank note bianry image and each preset standard bank note bianry image are carried out same
Or operation and sum, each matched pixel points are obtained, the standard bank note bianry image is the head-on reflection to standard bank note
Image carries out the obtained image of binary conversion treatment；
Determine the maximum value in each matched pixel points；
If the maximum value is greater than preset threshold value, the corresponding standard bank note of the maximum value is determined as and the mesh
The corresponding standard bank note of millimeter paper coin.
Further, second offset printing extracted in the backside reflection image may include: to being patterned
Determine the first offset printing described in the standard bank note to the position and second offset printing being patterned to being patterned
Position between functional relation；
It is anti-at the back side to being patterned that second offset printing is oriented according to the functional relation and the first position
Penetrate the second position in image；
Second offset printing is extracted to being patterned according to the second position.
Further, described to extract the third offset printing respectively to the first edge contour pixel group being patterned and described
Four offset printings may include: to the second edge contour pixel group being patterned
The third offset printing is denoised to being patterned with the 4th offset printing to being patterned respectively using median filtering
Processing, third offset printing after being denoised is to the 4th offset printing after being patterned and denoising to being patterned；
Using high-pass filtering respectively to the third offset printing after denoising to the 4th offset printing after being patterned and denoising
It is sharpened processing to being patterned, the third offset printing after being sharpened is to the 4th offset printing after being patterned and sharpening to being patterned；
Respectively to the third offset printing after sharpening to the 4th offset printing after being patterned and sharpening to be patterned carry out
Edge connection processing, third offset printing after being connected is to the 4th offset printing after being patterned and connecting to being patterned；
From the third offset printing after connection to being patterned described in the most closed contour of middle selected pixels point number is used as
First edge contour pixel group；
From the 4th offset printing after connection to being patterned described in the most closed contour of middle selected pixels point number is used as
Second edge contour pixel group.
The second aspect of the embodiment of the present invention provides a kind of offset printing to print detection device, may include:
Image collection module, for obtaining the head-on reflection image and backside reflection image of target bank note respectively；
First pattern extraction module, for extracting the first offset printing in the head-on reflection image to being patterned；
Second pattern extraction module, for extracting the second offset printing in the backside reflection image to being patterned；
Flip module, for first offset printing to being patterned with second offset printing to one of them in being patterned
Flip horizontal is carried out, obtains third offset printing to being patterned, another is remained unchanged, and is denoted as the 4th offset printing to being patterned；
Edge extracting module, for extracting the third offset printing respectively to the first edge contour pixel group and institute being patterned
The 4th offset printing is stated to the second edge contour pixel group being patterned；
First computing module, for calculating the first edge contour pixel group and the second edge contour pixel group
The number of coincident pixel point；
First determination module determines institute if the number for the coincident pixel point is fallen into preset numberical range
The offset printing for stating target bank note is normal to printing；
Second determination module determines the mesh if the number for the coincident pixel point exceeds the numberical range
The offset printing of millimeter paper coin is abnormal to print.
Further, the first pattern extraction module may include:
Target area estimation unit, for estimating that first offset printing is anti-in the front to being patterned according to predeterminated position
Penetrate the target area in image, the predeterminated position is first offset printing to being patterned in mark corresponding with the target bank note
Position in quasi- bank note；
Target area binarization unit obtains target for carrying out binary conversion treatment to the image in the target area
Region bianry image；
First position positioning unit, it is described for being gone out according to the pixel grey scale Distribution and localization of the target area bianry image
First offset printing is to the first position being patterned in the head-on reflection image；
First pattern extraction unit, for extracting first offset printing to being patterned according to the first position.
Further, the offset printing to print detection device can also include:
Target bank note binarization block carries out binary conversion treatment for the head-on reflection image to the target bank note, obtains
To target bank note bianry image；
Second computing module, for by the target bank note bianry image and each preset standard bank note bianry image
Corresponding pixel points carry out same or operation and sum, and obtain each matched pixel points, and the standard bank note bianry image is to mark
The head-on reflection image of quasi- bank note carries out the obtained image of binary conversion treatment；
Maximum value determining module, for determining the maximum value in each matched pixel points；
Standard bank note determining module, it is if being greater than preset threshold value for the maximum value, the maximum value is corresponding
Standard bank note is determined as standard bank note corresponding with the target bank note.
Further, the second pattern extraction module may include:
Functional relation determination unit, for determine the first offset printing described in the standard bank note to the position that is patterned and
Second offset printing is to the functional relation between the position being patterned；
Second position positioning unit, for orienting second offset printing according to the functional relation and the first position
To the second position being patterned in the backside reflection image；
Second pattern extraction unit, for extracting second offset printing to being patterned according to the second position.
Further, the edge extracting module may include:
Median filter unit, for using median filtering respectively to the third offset printing to being patterned and the 4th offset printing
To being patterned carry out denoising, the third offset printing after being denoised is to the 4th offset printing after being patterned and denoising to being patterned；
High pass filter unit, for using high-pass filtering respectively to the third offset printing after denoising to being patterned and denoise
The 4th offset printing afterwards is sharpened processing to being patterned, and the third offset printing after being sharpened is to after being patterned and sharpening
Four offset printings are to being patterned；
Edge connection unit, for respectively to the third offset printing after sharpening to the described 4th after being patterned and sharpening
Offset printing is to progress edge connection processing is patterned, and the third offset printing after being connected is to the 4th offset printing pair after being patterned and connecting
It is patterned；
First edge selection unit, for from the third offset printing after connection to being patterned middle selected pixels point number most
More closed contours is as the first edge contour pixel group；
Second edge selection unit, for from the 4th offset printing after connection to being patterned middle selected pixels point number most
More closed contours is as the second edge contour pixel group.
The third aspect of the embodiment of the present invention provides a kind of offset printing and detects terminal device, including memory, processing to print
Device and storage are in the memory and the computer program that can run on the processor, which is characterized in that the place
It manages and realizes the step of any of the above offset printing is to print detection method when device executes the computer program.
The fourth aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer program, which is characterized in that any of the above glue is realized when the computer program is executed by processor
The step of print is to print detection method.
Existing beneficial effect is the present invention compared with prior art: the present invention obtains the head-on reflection of target bank note respectively
Image and backside reflection image；The first offset printing in the head-on reflection image is extracted to being patterned；Extract the back side
The second offset printing in reflected image is to being patterned；To first offset printing to be patterned with second offset printing to being patterned in
It is one of to carry out flip horizontal, third offset printing is obtained to being patterned, another is remained unchanged, and is denoted as the 4th offset printing to impression
Case；The third offset printing is extracted respectively to the first edge contour pixel group and the 4th offset printing being patterned to be patterned
Two edge contour pixel groups；Calculate the coincident pixel of the first edge contour pixel group and the second edge contour pixel group
The number of point；If the number of the coincident pixel point is fallen into preset numberical range, the offset printing of the target bank note is determined
It is normal to printing；If the number of the coincident pixel point exceeds the numberical range, determine the offset printing of the target bank note to print
It is abnormal.Through the invention, the obverse and reverse reflected image of target bank note is obtained, and extracts offset printing therein respectively to impression
Case, by one of offset printing to be patterned carry out flip horizontal after, by the coincident pixel for judging edge contour pixel group
Whether the number of point falls into preset numberical range whether detect offset printing normal to being patterned, can be merely with existing inspection
Reflectogram acquired in measurement equipment carries out effective offset printing and detects to print, save to existing equipment carry out upgrading at
This.
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 schematic flow diagram of the offset printing provided in an embodiment of the present invention to print detection method；
Fig. 2 a is offset printing to the schematic diagram being patterned；
Fig. 2 b is to offset printing to the schematic diagram for being patterned progress flip horizontal；
Fig. 3 is to offset printing to the schematic diagram for being patterned the connection processing of progress edge；
Fig. 4 is schematic block diagram of the offset printing provided in an embodiment of the present invention to print detection device；
Fig. 5 is schematic block diagram of the offset printing provided in an embodiment of the present invention to print detection terminal device.
Specific embodiment
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that disclosed below
Embodiment be only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field
Those of ordinary skill's all other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
As shown in Figure 1, being a kind of schematic flow diagram of the offset printing provided in an embodiment of the present invention to print detection method, the side
Method may include:
Step S101 obtains the head-on reflection image and backside reflection image of target bank note respectively.
The target bank note is containing offset printing to the bank note being patterned, for example, the target bank note can be 2005 editions
100 yuans, there is the offset printing of an ancient money pattern in middle to being patterned on the right side of main scape pattern.The target bank note is also
It can be to be not especially limited to the Hongkong dollar, South Korean Won and other bank note, the present embodiment that are patterned to this containing offset printing.
Step S102 extracts the first offset printing in the head-on reflection image to being patterned.
Fig. 2 a is bank note offset printing to the schematic diagram being patterned, and respectively there is a semicircular ring at front and the back side, if viewed in transmittance
A complete annulus can just be synthesized.One group of complete offset printing is by positive first offset printing pair of target bank note to being patterned
It is patterned with second offset printing at the target bank note back side to being patterned composition.For example, 2005 editions 100 yuans of fronts include
The half of ancient coins pattern, i.e., to being patterned, the back side includes the other half of ancient coins pattern, i.e., described second offset printing for described first offset printing
To being patterned.
Preferably, step S102 can specifically include:
Step S1021 estimates first offset printing to being patterned in the head-on reflection image according to predeterminated position
Target area.
The predeterminated position is first offset printing to being patterned in standard bank note corresponding with the target bank note
Position.Due to different bank note, such as RMB, Hongkong dollar, South Korean Won all correspond to different offset printings to being patterned, and offset printing is to print
Pattern is in the different location of bank note, therefore to determine the currency type of target bank note in advance.
Firstly, the head-on reflection image to the target bank note carries out binary conversion treatment, target bank note bianry image is obtained.
It is, for example, possible to use head-on reflection image of the adaptive threshold Binarization methods to the target bank note to carry out two-value
Change processing, divides the image into lesser piece, calculates separately every piece of histogram, is each piece according to the peak value of each histogram
Calculate its threshold value.The threshold value of each pixel carries out interpolation acquisition according to the threshold value of adjacent block.It should be noted that can be with
Other binary processing methods are chosen according to actual needs, and the present embodiment is not especially limited this.
Then, the respective pixel of the target bank note bianry image and each preset standard bank note bianry image is clicked through
Capable same or operation is simultaneously summed, and each matched pixel points are obtained.The standard bank note bianry image is the front to standard bank note
Reflected image carries out the obtained image of binary conversion treatment.
For example, the standard bank note can be respectively RMB, Hongkong dollar, South Korean Won, it is assumed that each standard bank note and the mesh
The bianry image of millimeter paper coin contains 10000 pixels, and the gray value of each pixel is 0 or 1.First by target bank note
Each corresponding pixel points of each pixel and RMB carry out same or operation, then operation result are summed, if the two has
The gray value of 9000 pixels be it is identical, there is the gray value of 1000 pixels to be different, then its with or operation after again
The result of summation is 9000 namely the matched pixel of the two points are 9000.Similarly, can also successively acquire again target bank note with
The matched pixel points of Hongkong dollar, South Korean Won.
Finally, determining the maximum value in each matched pixel points, and it is default to judge whether the maximum value is greater than
Threshold value.The threshold value can be configured according to the actual situation, for example, 9000,8000,7000 etc. can be set to
Deng the present embodiment is not especially limited this.
If the maximum value is greater than the threshold value, the corresponding standard bank note of the maximum value is determined as and the target
The corresponding standard bank note of bank note.For example, if the matched pixel points of RMB, Hongkong dollar, South Korean Won are respectively 9000,3000,1000,
And the threshold value is 8000, then RMB is determined as standard bank note corresponding with the target bank note.
If the maximum value is less than or equal to the threshold value, it is believed that target bank note and each standard bank note are not
Match.Can choose other standard bank note at this time to continue to match, if the standard bank note has been matched, but still can not
It no longer needs to carry out subsequent detection it may be considered that target bank note is abnormal coin with success.
Step S1022 carries out binary conversion treatment to the image in the target area, obtains target area bianry image.
Step S1023 goes out first offset printing pair according to the pixel grey scale Distribution and localization of the target area bianry image
It is patterned the first position in the head-on reflection image.
Step S1024 extracts first offset printing to being patterned according to the first position.
The target area is the first offset printing for estimating to the possible position region being patterned, and range is larger than
First offset printing needs further to be accurately positioned out the first offset printing to the position being patterned to the actual range being patterned.
For example, can be accurately positioned using the method for sliding window, it is assumed that the width of the target area is W, high
Degree is H, and known first offset printing is NW (NW < W) to the width being patterned, and is highly NH (NH < H), and first movement window is root
Window is formed by the width of the height and target area that are patterned according to known first offset printing, i.e. selection size is W × NH's
Window moves first movement window line by line, and obtains the pixel grey scale accumulated value of current first movement window region, for
When the pixel grey scale accumulated value of first movement window is maximum value, first the first offset printing of behavior of region is to being patterned
Region initial row.Second moving window is the window formed according to known first offset printing to the height and width being patterned
Mouthful, i.e., selection size is the window of NW × NH, moves the second moving window by column, and obtain current second moving window location
The pixel grey scale accumulated value in domain, when the pixel grey scale accumulated value for the second moving window is maximum value, the of region
One, which is classified as the first offset printing, arranges the starting in the region where being patterned.Finally, according to the initial row, starting column and known the
One offset printing to be patterned height, width, orient first offset printing to be patterned in the head-on reflection image
One position simultaneously extracts first offset printing to being patterned from the first position.
Step S103 extracts the second offset printing in the backside reflection image to being patterned.
Firstly, determining the first offset printing described in the standard bank note to the position and second offset printing that are patterned to print
Functional relation between the position of pattern.
Then, second offset printing is oriented to being patterned in the back according to the functional relation and the first position
The second position in the reflected image of face.
Finally, extracting second offset printing to being patterned according to the second position.
For example, it is assumed that the width of target bank note is A, it is highly B, the first offset printing is W to the width being patterned, and is highly
H, and the starting behavior R1 being calculated in step s 102, starting is classified as C1, then by preset function relationship R2=B-R1-H, C2
=A-C1-W can in the hope of second offset printing to be patterned in the backside reflection image initial row, starting arrange, and by
It is consistent to the width, height that are patterned with first offset printing to being patterned in second offset printing, then it can orient institute
It states the second offset printing and extracts described to the second position being patterned in the backside reflection image and from the second position
Two offset printings are to being patterned.
It is especially noted that above step S102 and step S103 are first to position the first offset printing to being patterned, then root
The second offset printing is positioned to the functional relation between the position being patterned to the position being patterned according to the first and second offset printings.It is practical
In, the second offset printing can also be first positioned to being patterned, further according to the first and second offset printings between the position being patterned
Functional relation positions the first offset printing to the position being patterned.Detailed process is similar with the description of step S102, step S103, this
Embodiment repeats no more this.
Step S104, to first offset printing to being patterned with second offset printing to one of progress in being patterned
Flip horizontal obtains third offset printing to being patterned, another is remained unchanged, and is denoted as the 4th offset printing to being patterned.
As shown in Figure 2 b, to two offset printings to a progress flip horizontal in being patterned, another is remained unchanged.
The process of the flip horizontal may include:
Firstly, second offset printing is obtained under preset coordinate system to the maximum coordinate value among being patterned on transverse axis, it is described
Coordinate system using the first pixel as coordinate origin, using from first pixel to the direction of the second pixel as horizontal axis just
Direction, using, as longitudinal axis positive direction, first pixel is described from first pixel to the direction of third pixel
To the pixel in the most lower left corner being patterned, second pixel is that second offset printing is most right to what is be patterned for second offset printing
The pixel of inferior horn, the third pixel are pixel of second offset printing to the most upper left corner being patterned；
Then, first coordinate value of second offset printing to pixel each in being patterned on transverse axis is obtained；
Finally, according to the maximum coordinate value among and first coordinate value determine after each pixel flip horizontal
The second coordinate value on horizontal axis, second coordinate value are equal to the difference of the maximum coordinate value among and first coordinate value.
It should be noted that coordinate of each pixel on y direction is not during the flip horizontal
Become.
Step S105 extracts the third offset printing to the first edge contour pixel group and the 4th glue being patterned respectively
Print is to the second edge contour pixel group being patterned.
By extracting the edge of offset printing pattern, both to analyze to print property, if edge just connects, without excessively heavy
It closes or mutually from it can be said that it is completely to print that gelatin, which is patterned,.Extract edge process may include:
Step S1051, using median filtering respectively to the third offset printing to being patterned with the 4th offset printing to impression
Case carries out denoising, and third offset printing after being denoised is to the 4th offset printing after being patterned and denoising to being patterned.
Edge is the violent place of image change, is consequently belonging to the high fdrequency component of image, but common noise also belongs to
High fdrequency component, therefore to do denoising to image first to reduce interference.
Step S1052, using high-pass filtering respectively to the third offset printing after denoising to the institute after being patterned and denoising
It states the 4th offset printing and is sharpened processing to being patterned, the third offset printing after being sharpened is to the 4th offset printing after being patterned and sharpening
To being patterned.
After denoising by previous step, the method for using high-pass filtering herein can be removed useless by high-pass filtering
Low frequency component, maximum reserved high-frequency component, the i.e. marginal information of our needs.
Step S1053, respectively to the third offset printing after sharpening to the 4th offset printing pair after being patterned and sharpening
It is patterned and carries out edge connection processing, the third offset printing after being connected is to the 4th offset printing after being patterned and connecting to impression
Case.
As shown in figure 3, each of positioning image endpoint, the endpoint are to have in its eight neighborhood and before only one
16 neighborhoods of its more outer layer are searched in the special foreground point at sight spot, if there is foreground point, by the point between the endpoint and foreground point
Also it is changed to foreground point.The foreground point is pixel of the offset printing to the edge contour being patterned.
Step S1054, from the third offset printing after connection to being patterned the most closure wheel of middle selected pixels point number
Exterior feature is used as the first edge contour pixel group.
Step S1055, from the 4th offset printing after connection to being patterned the most closure wheel of middle selected pixels point number
Exterior feature is used as the second edge contour pixel group.
Aforementioned obtained edge might not be available, it is also necessary to be removed useless line segment, can be led in the present embodiment
Chain code search is crossed, finds a longest closed contour in image namely the most closed contour of pixel number as edge
Contour pixel group.
Step S106 calculates the coincident pixel of the first edge contour pixel group and the second edge contour pixel group
The number of point.
The two is placed under the same coordinate system, which picture the pixel value by comparing each pixel of the two can determine that
Vegetarian refreshments is to be overlapped pixel.
Step S107, judges whether the number of the coincident pixel point falls into preset numberical range.
The numberical range can be in advance that reference is configured with standard bank note.For example, if the coincidence picture of standard bank note
The number of vegetarian refreshments is 1000, then can set the numberical range to the open interval from 900 to 1100.
If the number of the coincident pixel point is fallen into preset numberical range, S108 is thened follow the steps, if the coincidence
The number of pixel exceeds the numberical range, thens follow the steps S109.
Step S108 determines that the offset printing of the target bank note is normal to printing.
Step S109 determines that the offset printing of the target bank note is abnormal to print.
The embodiment of the present invention obtains the obverse and reverse reflected image of target bank note, and extracts offset printing pair therein respectively
Be patterned, by one of offset printing to be patterned carry out flip horizontal after, by the coincidence for judging edge contour pixel group
Whether the number of pixel falls into preset numberical range whether detect offset printing normal to being patterned, can be merely with existing
Detection device acquired in reflectogram carry out effective offset printing print detected, save and upgrading carried out to existing equipment
Cost.
Corresponding to offset printing described in foregoing embodiments to print detection method, Fig. 4 shows provided in an embodiment of the present invention one
Kind offset printing is to the schematic block diagram of print detection device, and for ease of description, only parts related to embodiments of the present invention are shown, institute
Stating device may include:
Image collection module 401, for obtaining the head-on reflection image and backside reflection image of target bank note respectively；
First pattern extraction module 402, for extracting the first offset printing in the head-on reflection image to being patterned；
Second pattern extraction module 403, for extracting the second offset printing in the backside reflection image to being patterned；
Flip module 404, for first offset printing to be patterned with second offset printing in being patterned wherein
One progress flip horizontal, obtains third offset printing to being patterned, another is remained unchanged, and is denoted as the 4th offset printing to being patterned；
Edge extracting module 405, for extracting the third offset printing respectively to the first edge contour pixel group being patterned
With the 4th offset printing to the second edge contour pixel group being patterned；
First computing module 406, for calculating the first edge contour pixel group and the second edge contour pixel
The number of the coincident pixel point of group；
First determination module 407 determines if the number for the coincident pixel point is fallen into preset numberical range
The offset printing of the target bank note is normal to printing；
Second determination module 408, if for the coincident pixel point number exceed the numberical range, determine described in
The offset printing of target bank note is abnormal to print.
Further, the offset printing to print detection device can also include:
Target bank note binarization block 409 carries out binary conversion treatment for the head-on reflection image to the target bank note,
Obtain target bank note bianry image；
Second computing module 410 is used for the target bank note bianry image and each preset standard bank note binary map
The corresponding pixel points of picture carry out same or operation and sum, and obtain each matched pixel points, and the standard bank note bianry image is
The obtained image of binary conversion treatment is carried out to the head-on reflection image of standard bank note；
Maximum value determining module 411, for determining the maximum value in each matched pixel points；
Standard bank note determining module 412, it is if being greater than preset threshold value for the maximum value, the maximum value is corresponding
Standard bank note be determined as standard bank note corresponding with the target bank note.
Further, the first pattern extraction module 402 may include:
Target area estimation unit 4021, for according to predeterminated position estimate first offset printing to be patterned it is described just
Target area in the reflected image of face, the predeterminated position are first offset printing to being patterned corresponding with the target bank note
Standard bank note in position；
Target area binarization unit 4022 is obtained for carrying out binary conversion treatment to the image in the target area
Target area bianry image；
First position positioning unit 4023, for being gone out according to the pixel grey scale Distribution and localization of the target area bianry image
First offset printing is to the first position being patterned in the head-on reflection image；
First pattern extraction unit 4024, for extracting first offset printing to being patterned according to the first position.
Further, the second pattern extraction module 403 may include:
Functional relation determination unit 4031, for determining the first offset printing described in the standard bank note to the position being patterned
It sets and second offset printing is to the functional relation between the position being patterned；
Second position positioning unit 4032, for orienting described second according to the functional relation and the first position
Offset printing is to the second position being patterned in the backside reflection image；
Second pattern extraction unit 4033, for extracting second offset printing to being patterned according to the second position.
Further, the edge extracting module 405 may include:
Median filter unit 4051, for using median filtering respectively to the third offset printing to being patterned and the described 4th
Offset printing is to carry out denoising is patterned, and the third offset printing after being denoised is to the 4th offset printing after being patterned and denoising to impression
Case；
High pass filter unit 4052, for using high-pass filtering respectively to the third offset printing after denoising to being patterned and
The 4th offset printing after denoising is sharpened processing to being patterned, after the third offset printing after being sharpened is to being patterned and sharpening
The 4th offset printing to being patterned；
Edge connection unit 4053, for respectively to the third offset printing after sharpening to described in after being patterned and sharpening
4th offset printing is to progress edge connection processing is patterned, and the third offset printing after being connected is to the 4th glue after being patterned and connecting
Print is to being patterned；
First edge selection unit 4054, for counting from the third offset printing after connection middle selected pixels are patterned
The most closed contour of mesh is as the first edge contour pixel group；
Second edge selection unit 4055, for counting from the 4th offset printing after connection middle selected pixels are patterned
The most closed contour of mesh is as the second edge contour pixel group.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
It should be understood that the size of the serial number of each step is not meant that the order of the execution order in above-mentioned each embodiment, respectively
The execution sequence of process should be determined by its function and internal logic, and the implementation process without coping with the embodiment of the present invention constitutes any
It limits.
Fig. 5 is schematic block diagram of the offset printing provided in an embodiment of the present invention to print detection terminal device.As shown in figure 5, the reality
The offset printing of example is applied to include: processor 50, memory 51 to print detection terminal device 5 and be stored in the memory 51 and can
The computer program 52 run on the processor 50.The processor 50 is realized above-mentioned when executing the computer program 52
Each offset printing is to the step in print detection method embodiment, such as step S101 shown in FIG. 1 to step S109.Alternatively, described
Processor 50 realizes the function of each module/unit in above-mentioned each Installation practice, such as Fig. 4 when executing the computer program 52
Shown module 401 to module 408 function.
Illustratively, the computer program 52 can be divided into one or more module/units, it is one or
Multiple module/units are stored in the memory 51, and are executed by the processor 50, to complete the present invention.Described one
A or multiple module/units can be the series of computation machine program instruction section that can complete specific function, which is used for
The computer program 52 is described in the offset printing to the implementation procedure in print detection terminal device 5.For example, the computer journey
Sequence 52 can be divided into image collection module, the first pattern extraction module, the second pattern extraction module, flip module, edge
Extraction module, the first computing module, the first determination module and the second determination module.
The offset printing can be cash inspecting machine, deposit machine, cash dispenser and cash recycling system etc. eventually to print detection terminal device 5
End equipment.The offset printing may include to print detection terminal device, but be not limited only to, processor 50, memory 51.Art technology
Personnel are appreciated that Fig. 5 is only example of the offset printing to print detection terminal device 5, do not constitute and detect terminal to print to offset printing
The restriction of equipment 5 may include perhaps combining certain components or different components, example than illustrating more or fewer components
Such as described offset printing can also include input-output equipment, network access equipment, bus to print detection terminal device 5.
The processor 50 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng.
The memory 51 can be the offset printing to the internal storage unit of print detection terminal device 5, such as offset printing pair
The hard disk or memory of print detection terminal device 5.The memory 51 is also possible to the offset printing to the outer of print detection terminal device 5
Portion stores equipment, such as the offset printing to the plug-in type hard disk being equipped on print detection terminal device 5, intelligent memory card (Smart
Media Card, SMC), secure digital (Secure Digital, SD) card, flash card (Flash Card) etc..Further,
The memory 51 can also both include the offset printing to the internal storage unit of print detection terminal device 5 or including external storage
Equipment.The memory 51 for store the computer program and the offset printing to print detect terminal device 5 needed for its
Its program and data.The memory 51 can be also used for temporarily storing the data that has exported or will export.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device is divided into different functional unit or module, more than completing
The all or part of function of description.Each functional unit in embodiment, module can integrate in one processing unit, can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units, it is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.In addition, each function list
Member, the specific name of module are also only for convenience of distinguishing each other, the protection scope being not intended to limit this application.Above system
The specific work process of middle unit, module, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed device/terminal device and method, it can be with
It realizes by another way.For example, device described above/terminal device embodiment is only schematical, for example, institute
The division of module or unit is stated, only a kind of logical function partition, there may be another division manner in actual implementation, such as
Multiple units or components can be combined or can be integrated into another system, or some features can be ignored or not executed.Separately
A bit, shown or discussed mutual coupling or direct-coupling or communication connection can be through some interfaces, device
Or the INDIRECT COUPLING or communication connection of unit, it can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated module/unit be realized in the form of SFU software functional unit and as independent product sale or
In use, can store in a computer readable storage medium.Based on this understanding, the present invention realizes above-mentioned implementation
All or part of the process in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in a computer readable storage medium, the computer program when being executed by processor, it can be achieved that on
The step of stating each embodiment of the method.Wherein, the computer program includes computer program code, the computer program generation
Code can be source code form, object identification code form, executable file or certain intermediate forms etc..The computer-readable medium
It may include: any entity or device, recording medium, USB flash disk, mobile hard disk, magnetic that can carry the computer program code
Dish, CD, computer storage, read-only memory (ROM, Read-Only Memory), random access memory (RAM,
Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that described
The content that computer-readable medium includes can carry out increasing appropriate according to the requirement made laws in jurisdiction with patent practice
Subtract, such as does not include electric carrier signal and electricity according to legislation and patent practice, computer-readable medium in certain jurisdictions
Believe signal.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (8)
1. a kind of offset printing is to print detection method characterized by comprising
The head-on reflection image and backside reflection image of target bank note are obtained respectively；
The first offset printing in the head-on reflection image is extracted to being patterned；
The second offset printing in the backside reflection image is extracted to being patterned；
To first offset printing to being patterned with second offset printing to one of carry out flip horizontal in being patterned, obtain
To being patterned, another is remained unchanged for third offset printing, is denoted as the 4th offset printing to being patterned；
The third offset printing is extracted respectively to the first edge contour pixel group and the 4th offset printing that are patterned to being patterned
Second edge contour pixel group；
Calculate the number of the coincident pixel point of the first edge contour pixel group and the second edge contour pixel group；
If the number of the coincident pixel point is fallen into preset numberical range, determine the offset printing of the target bank note to print just
Often；
If the number of the coincident pixel point exceeds the numberical range, determine that the offset printing of the target bank note is abnormal to print；
First offset printing extracted in the head-on reflection image includes: to being patterned
According to predeterminated position estimate first offset printing to the target area being patterned in the head-on reflection image, it is described pre-
If position is first offset printing to the position being patterned in standard bank note corresponding with the target bank note；
Binary conversion treatment is carried out to the image in the target area, obtains target area bianry image；
According to the pixel grey scale Distribution and localization of the target area bianry image go out first offset printing to be patterned it is described just
First position in the reflected image of face；
First offset printing is extracted to being patterned according to the first position.
2. offset printing according to claim 1 is to print detection method, which is characterized in that according to predeterminated position estimation described the
One offset printing is to being patterned before the target area in the head-on reflection image, further includes:
Binary conversion treatment is carried out to the head-on reflection image of the target bank note, obtains target bank note bianry image；
The corresponding pixel points of the target bank note bianry image and each preset standard bank note bianry image are carried out with or transported
It calculates and sums, obtain each matched pixel points, the standard bank note bianry image is the head-on reflection image to standard bank note
Carry out the obtained image of binary conversion treatment；
Determine the maximum value in each matched pixel points；
If the maximum value is greater than preset threshold value, the corresponding standard bank note of the maximum value is determined as and the target basis
The corresponding standard bank note of coin.
3. offset printing according to claim 1 is to print detection method, which is characterized in that described to extract the reflected rear view
The second offset printing as in includes: to being patterned
Determine the first offset printing described in the standard bank note to the position and second offset printing that are patterned to the position being patterned
Functional relation between setting；
Second offset printing is oriented to being patterned in the reflected rear view according to the functional relation and the first position
The second position as in；
Second offset printing is extracted to being patterned according to the second position.
4. offset printing according to any one of claim 1 to 3 is to print detection method, which is characterized in that described to extract respectively
The third offset printing is to the first edge contour pixel group and the 4th offset printing that are patterned to the second edge profile being patterned
Pixel group includes:
Using median filtering respectively to the third offset printing to being patterned with the 4th offset printing to being patterned carry out denoising,
Third offset printing after being denoised is to the 4th offset printing after being patterned and denoising to being patterned；
Using high-pass filtering respectively to the third offset printing after denoising to the 4th offset printing after being patterned and denoising to print
Pattern is sharpened processing, and the third offset printing after being sharpened is to the 4th offset printing after being patterned and sharpening to being patterned；
Respectively to the third offset printing after sharpening to the 4th offset printing after being patterned and sharpening to being patterned carry out edge
Connection processing, third offset printing after being connected is to the 4th offset printing after being patterned and connecting to being patterned；
From the third offset printing after connection to being patterned the most closed contour of middle selected pixels point number as described first
Edge contour pixel group；
From the 4th offset printing after connection to being patterned the most closed contour of middle selected pixels point number as described second
Edge contour pixel group.
5. a kind of offset printing is to print detection device characterized by comprising
Image collection module, for obtaining the head-on reflection image and backside reflection image of target bank note respectively；
First pattern extraction module, for extracting the first offset printing in the head-on reflection image to being patterned；
Second pattern extraction module, for extracting the second offset printing in the backside reflection image to being patterned；
Flip module, for first offset printing to being patterned with second offset printing to one of progress in being patterned
Flip horizontal obtains third offset printing to being patterned, another is remained unchanged, and is denoted as the 4th offset printing to being patterned；
Edge extracting module, for extracting the third offset printing respectively to the first edge contour pixel group being patterned and described
Four offset printings are to the second edge contour pixel group being patterned；
First computing module, for calculating the coincidence of the first edge contour pixel group and the second edge contour pixel group
The number of pixel；
First determination module determines the mesh if the number for the coincident pixel point is fallen into preset numberical range
The offset printing of millimeter paper coin is normal to printing；
Second determination module determines the target basis if the number for the coincident pixel point exceeds the numberical range
The offset printing of coin is abnormal to print；
The first pattern extraction module includes:
Target area estimation unit, for estimating first offset printing to being patterned in the head-on reflection figure according to predeterminated position
Target area as in, the predeterminated position are first offset printing to being patterned in standard paper corresponding with the target bank note
Position in coin；
Target area binarization unit obtains target area for carrying out binary conversion treatment to the image in the target area
Bianry image；
First position positioning unit, for going out described first according to the pixel grey scale Distribution and localization of the target area bianry image
Offset printing is to the first position being patterned in the head-on reflection image；
First pattern extraction unit, for extracting first offset printing to being patterned according to the first position.
6. offset printing according to claim 5 is to print detection device, which is characterized in that the edge extracting module includes:
Median filter unit, for using median filtering respectively to the third offset printing to being patterned with the 4th offset printing to print
Pattern carries out denoising, and third offset printing after being denoised is to the 4th offset printing after being patterned and denoising to being patterned；
High pass filter unit, for using high-pass filtering respectively to the third offset printing after denoising to being patterned and denoising after
4th offset printing is sharpened processing to being patterned, and the third offset printing after being sharpened is to the 4th glue after being patterned and sharpening
Print is to being patterned；
Edge connection unit, for respectively to the third offset printing after sharpening to the 4th offset printing after being patterned and sharpening
Edge connection processing is carried out to being patterned, the third offset printing after being connected is to the 4th offset printing after being patterned and connecting to impression
Case；
First edge selection unit, for most to middle selected pixels point number is patterned from the third offset printing after connection
Closed contour is as the first edge contour pixel group；
Second edge selection unit, for most to middle selected pixels point number is patterned from the 4th offset printing after connection
Closed contour is as the second edge contour pixel group.
7. a kind of offset printing detects terminal device to print, including memory, processor and storage are in the memory and can be
The computer program run on the processor, which is characterized in that the processor is realized such as when executing the computer program
The step of offset printing described in any one of Claims 1-4 is to print detection method.
8. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In the computer program realizes offset printing according to any one of claims 1 to 4 to print detection side when being executed by processor
The step of method.
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| JP6823839B2 (en) * | 2019-06-17 | 2021-02-03 | 大日本印刷株式会社 | Judgment device, control method of judgment device, judgment system, control method of judgment system, and program |
| JP6809567B2 (en) * | 2019-06-21 | 2021-01-06 | 大日本印刷株式会社 | Judgment device, control method of judgment device, judgment system, control method of judgment system, and program |
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