CN105427448B - A kind of method and device obtaining bank note safety line boundary - Google Patents
A kind of method and device obtaining bank note safety line boundary Download PDFInfo
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- CN105427448B CN105427448B CN201510724124.9A CN201510724124A CN105427448B CN 105427448 B CN105427448 B CN 105427448B CN 201510724124 A CN201510724124 A CN 201510724124A CN 105427448 B CN105427448 B CN 105427448B
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- Prior art keywords
- safety line
- bank note
- hand edge
- column
- position coordinates
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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
Abstract
The embodiment of the invention discloses a kind of method and devices on acquisition bank note safety line boundary, the present invention utilizes the certain minimum feature of gray value where safety line, and the features such as small according to safety line width itself, lookup amount is few, the new bank note safety line integrality detection method of design, using the method for gray value row projection, the feature of safety line is obtained；It is scheduled on this stabilization, apparent safe line position of feature Primary Location in safety line using gray value low order column one, accuracy rate can be improved, exclude noise jamming；The present invention is that small range is searched to the left and right sides from minimum value row, can't be influenced by curve smoothing part in the lookup of curve steep part, and the influences of the special circumstances to integrity detection such as safety line tilts, safety line edge blacks can be excluded.
Description
Technical field
The present embodiments relate to the technical field of detection bank note more particularly to a kind of sides obtaining bank note safety line boundary
Method and device.
Background technology
Existing safety line integrity detection generally searches gray value inflection point by column with difference, and this method is not only looked into
It looks for often, and is easy to be influenced by noise etc., tend not to accurately find very much safety line edge.
Invention content
The purpose of the embodiment of the present invention is to propose a kind of method and device on acquisition bank note safety line boundary, it is intended to solve
The problem of safety line edge how is accurately positioned and quickly detects safety line integrality.
For this purpose, the embodiment of the present invention uses following technical scheme：
In a first aspect, a kind of method obtaining bank note safety line boundary, the method includes：
Intercept the region of bank note safety line to be detected；
The gray value information in the region is obtained, and obtains the sum of the gray value of each row according to the gray value information；
Obtain the corresponding position coordinates of gray value minimum in the sum of described gray value；
The position that the left hand edge of the bank note safety line is obtained according to the corresponding position coordinates of gray value of the minimum is sat
Mark；
The position coordinates of the right hand edge of the bank note safety line are obtained according to the position coordinates of the left hand edge.
Preferably, the region of the interception bank note safety line to be detected, including：
According to the infrared transmission figure of bank note to be detected and towards the region for intercepting safety line；
The infrared transmission figure according to bank note to be detected and the region towards interception safety line, including：
The back sides the BD reversed image for selecting bank note to be detected, the regional extent that safety line is intercepted under 100dpi resolution ratio are
X[320:410], [1 Y；end].
Preferably, the left side that the bank note safety line is obtained according to the corresponding position coordinates of gray value of the minimum
The position coordinates of edge, including：
From the corresponding position coordinates of gray value of the minimum, the row coordinate L of position coordinates minimum is obtained；
X [L]=column [L-1]-column [L+1] is calculated, the X [L] and pre-set threshold value T are compared,
In, the column [L+1] is the sum of corresponding gray values of row coordinate L+1, and the column [L-1] is that row coordinate L-1 is corresponded to
The sum of gray value；
If X [L]>T, it is determined that the position coordinates of the left hand edge of the bank note safety line are L.
Preferably, the left side that the bank note safety line is obtained according to the corresponding position coordinates of gray value of the minimum
The position coordinates of edge, including：
If the position coordinates of the left hand edge of the bank note safety line are L, according to pre-set step-length m, X [L+m] is calculated
=column [L+m+1]-column [L+m-1]；
X [L+m] and threshold value T are compared；
If X [L+m]>T, then L+m be classified as the right hand edge of the bank note safety line；
If X [L+m]≤T, continue to move to right the X [L+m+1] for calculating next column, the right side until finding the bank note safety line
Edge.
Preferably, the method further includes：
It is each to the left and right to move a row if X [L]≤T, calculate X [L-1]=column [L-2]-column [L] and X [L+1]
=column [L+2]-column [L]；
X [L-1] and X [L+1] are made comparisons with threshold value T respectively；
If X [L-1]>T, then L-1 be classified as safety line left hand edge row, otherwise continue to move to left detection, until find left hand edge arrange；
If X [L+1]>Then L+1 is classified as safety line right hand edge row to T, otherwise continues to move to right detection, until finding right hand edge row.
Preferably, the method further includes：
The width W=L2-L1-2, L1 of the safety line are obtained according to the position coordinates of the left and right edges of the safety line
For the left hand edge of the safety line, L2 is the right hand edge of the safety line；
The width W is compared with the safety line width range of normal bank note；
If the W is within the safety line width range of the normal bank note, it is determined that the safety line is normal；
If the W is except the safety line width range of the normal bank note, it is determined that the safety line is abnormal.
Second aspect, a kind of device obtaining bank note safety line boundary, described device include：
Interception module, the region for intercepting bank note safety line to be detected；
First acquisition module, the gray value information for obtaining the region, and obtained often according to the gray value information
The sum of the gray value of one row；
Second acquisition module, for obtaining the corresponding position coordinates of gray value minimum in the sum of described gray value；
Third acquisition module obtains the bank note safety line for the corresponding position coordinates of gray value according to the minimum
Left hand edge position coordinates；
4th acquisition module, the right hand edge for obtaining according to the position coordinates of the left hand edge bank note safety line
Position coordinates.
Preferably, the interception module, including：
Interception unit, for the infrared transmission figure according to bank note to be detected and the region towards interception safety line；
Interception unit is used for：
The back sides the BD reversed image for selecting bank note to be detected, the regional extent that safety line is intercepted under 100dpi resolution ratio are
X[320:410], [1 Y；end].
Preferably, the third acquisition module, including：
First acquisition unit, for from the corresponding position coordinates of gray value of the minimum, it is minimum to obtain position coordinates
Row coordinate L；
First computing unit, for calculating X [L]=column [L-1]-column [L+1], by the X [L] and in advance
The threshold value T of setting compares, wherein the column [L+1] is the sum of corresponding gray values of row coordinate L+1, the column [L-
1] it is the sum of corresponding gray values of row coordinate L-1；
First determination unit, if being used for X [L]>T, it is determined that the position coordinates of the left hand edge of the bank note safety line are L.
Preferably, the third acquisition module, including：
Second computing unit, if the position coordinates of the left hand edge for the bank note safety line are L, according to pre-set
Step-length m calculates X [L+m]=column [L+m+1]-column [L+m-1]；
Comparing unit, for comparing X [L+m] and threshold value T；
Second determination unit, if being used for X [L+m]>T, it is determined that L+m is classified as the right hand edge of the bank note safety line；If X [L
+ m]≤T, then continue to move to right the X [L+m+1] for calculating next column, the right hand edge until finding the bank note safety line.
Preferably, described device further includes：
First computing module, it is each to the left and right to move a row if being used for X [L]≤T, calculate X [L-1]=column [L-2]-
Column [L] and X [L+1]=column [L+2]-column [L]；
First comparison module, for X [L-1] and X [L+1] to make comparisons with threshold value T respectively；
First searching module, if being used for X [L-1]>T, then L-1 be classified as safety line left hand edge row, otherwise continue to move to left detection,
Until finding left hand edge row；
Second searching module, if being used for X [L+1]>Then L+1 is classified as safety line right hand edge row to T, otherwise continues to move to right detection,
Until finding right hand edge row.
Preferably, described device further includes：
5th acquisition module, the width for obtaining the safety line according to the position coordinates of the left and right edges of the safety line
W=L2-L1-2 is spent, L1 is the left hand edge of the safety line, and L2 is the right hand edge of the safety line；
Second comparison module, for the width W to be compared with the safety line width range of normal bank note；
First determining module, if for the W within the safety line width range of the normal bank note, it is determined that described
Safety line is normal；
Second determining module, if for the W except the safety line width range of the normal bank note, it is determined that described
Safety line is abnormal.
The region that the embodiment of the present invention passes through interception bank note safety line to be detected；The gray value information in the region is obtained,
And the sum of the gray value of each row is obtained according to the gray value information；Obtain gray value pair minimum in the sum of described gray value
The position coordinates answered；The position of the left hand edge of the bank note safety line is obtained according to the corresponding position coordinates of gray value of the minimum
Set coordinate；The position coordinates of the right hand edge of the bank note safety line are obtained according to the position coordinates of the left hand edge.Profit of the invention
With the certain minimum feature of the gray value where safety line, and it is small according to safety line width itself, lookup amount is few the features such as, design
New bank note safety line integrality detection method, using gray value row projection method, obtain the feature of safety line；Utilize ash
Angle value low order column one is scheduled on this stabilization, apparent safe line position of feature Primary Location in safety line, and it is accurate to improve
Rate excludes noise jamming；The present invention be from minimum value row to the left and right sides small range search, curve steep part lookup simultaneously
It will not be influenced by curve smoothing part, the special circumstances such as safety line tilts, safety line edge blacks can be excluded to complete
Property detection influence.
Description of the drawings
Fig. 1 is the flow diagram for the method that the embodiment of the present invention obtains bank note safety line boundary；
Fig. 2 is the schematic diagram of bank note safety line Gray Projection of the embodiment of the present invention；
Fig. 3 is the flow diagram for the method that the embodiment of the present invention obtains bank note safety line boundary；
Fig. 4 is the flow diagram for the method that the embodiment of the present invention obtains bank note safety line boundary；
Fig. 5 is the high-level schematic functional block diagram for the device that the embodiment of the present invention obtains bank note safety line boundary；
Fig. 6 is the high-level schematic functional block diagram of interception module of the embodiment of the present invention；
Fig. 7 is the high-level schematic functional block diagram of third acquisition module of the embodiment of the present invention；
Fig. 8 is the high-level schematic functional block diagram of third acquisition module of the embodiment of the present invention；
Fig. 9 is the high-level schematic functional block diagram for the device that the embodiment of the present invention obtains bank note safety line boundary；
Figure 10 is the high-level schematic functional block diagram for the device that the embodiment of the present invention obtains bank note safety line boundary.
Specific implementation mode
The embodiment of the present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this
The described specific embodiment in place is used only for explaining the embodiment of the present invention, rather than the restriction to the embodiment of the present invention.In addition also
It should be noted that illustrating only for ease of description, in attached drawing and the relevant part of the embodiment of the present invention rather than entire infrastructure.
Embodiment one
With reference to figure 1, Fig. 1 is the flow diagram for the method that the embodiment of the present invention obtains bank note safety line boundary.
In embodiment one, the method for obtaining bank note safety line boundary includes：
Step 101, the region of bank note safety line to be detected is intercepted；
Preferably, the region of the interception bank note safety line to be detected, including：
According to the infrared transmission figure of bank note to be detected and towards the region for intercepting safety line；
The infrared transmission figure according to bank note to be detected and the region towards interception safety line, including：
The back sides the BD reversed image for selecting bank note to be detected, the regional extent that safety line is intercepted under 100dpi resolution ratio are
X[320：410], [1 Y；end].
Step 102, the gray value information in the region is obtained, and obtains the gray scale of each row according to the gray value information
The sum of value；
Specifically, with reference to figure 2, Fig. 2 is the schematic diagram of bank note safety line Gray Projection of the embodiment of the present invention.To safety line area
The row of gray value are done to projection in domain, calculate the sum of the gray value of each row column [i].
Step 103, the corresponding position coordinates of gray value minimum in the sum of described gray value are obtained；
Specifically, the corresponding row number of minimum value for determining column [i] is L (multiple row is identical to take first), arranged on the basis of L,
X [L]=column [L-1]-column [L+1] is calculated, compared with threshold value T.
Step 104, the left hand edge of the bank note safety line is obtained according to the corresponding position coordinates of gray value of the minimum
Position coordinates；
Preferably, the left side that the bank note safety line is obtained according to the corresponding position coordinates of gray value of the minimum
The position coordinates of edge, including：
From the corresponding position coordinates of gray value of the minimum, the row coordinate L of position coordinates minimum is obtained；
X [L]=column [L-1]-column [L+1] is calculated, the X [L] and pre-set threshold value T are compared,
In, the column [L+1] is the sum of corresponding gray values of row coordinate L+1, and the column [L-1] is that row coordinate L-1 is corresponded to
The sum of gray value；
If X [L]>T, it is determined that the position coordinates of the left hand edge of the bank note safety line are L.
Preferably, the left side that the bank note safety line is obtained according to the corresponding position coordinates of gray value of the minimum
The position coordinates of edge, including：
If the position coordinates of the left hand edge of the bank note safety line are L, according to pre-set step-length m, Column is calculated
[L+m+1]-column[L+m-1]；
X [L+m] and threshold value T are compared；
If X [L+m]>T, then L+m be classified as the right hand edge of the bank note safety line；
If X [L+m]≤T, continue to move to right the X [L+m+1] for calculating next column, the right side until finding the bank note safety line
Edge.
If specifically, X [L]>T, then L be classified as safety line edge columns, and be left hand edge.In view of the safety of 05 millboard coin
Line normal width arranges left and right, therefore 5 row that can directly move right for 10, X [L+5]=column [L+4]-column [L+6]
Compare with threshold value T, X [L+5]>Then L+5 is classified as right hand edge to T, which is Ws=(L+5)-L=5, is otherwise continued
The X [L+i] for calculating next column is moved to right, it is wide with calculating bank note safety line according to the row number of two edge columns until finding right hand edge
Spend Ws.
Step 105, the position coordinates of the right hand edge of the bank note safety line are obtained according to the position coordinates of the left hand edge.
The region that the embodiment of the present invention passes through interception bank note safety line to be detected；The gray value information in the region is obtained,
And the sum of the gray value of each row is obtained according to the gray value information；Obtain gray value pair minimum in the sum of described gray value
The position coordinates answered；The position of the left hand edge of the bank note safety line is obtained according to the corresponding position coordinates of gray value of the minimum
Set coordinate；The position coordinates of the right hand edge of the bank note safety line are obtained according to the position coordinates of the left hand edge.Profit of the invention
With the certain minimum feature of the gray value where safety line, and it is small according to safety line width itself, lookup amount is few the features such as, design
New bank note safety line integrality detection method, using gray value row projection method, obtain the feature of safety line；Utilize ash
Angle value low order column one is scheduled on this stabilization, apparent safe line position of feature Primary Location in safety line, and it is accurate to improve
Rate excludes noise jamming；The present invention be from minimum value row to the left and right sides small range search, curve steep part lookup simultaneously
It will not be influenced by curve smoothing part, the special circumstances such as safety line tilts, safety line edge blacks can be excluded to complete
Property detection influence.
Embodiment two
With reference to figure 3, Fig. 3 is the flow diagram for the method that the embodiment of the present invention obtains bank note safety line boundary.
On the basis of embodiment one, the method for obtaining bank note safety line boundary further includes：
Step 106, each to the left and right to move a row if X [L]≤T, calculate X [L-1]=column [L-2]-column [L]
With X [L+1]=column [L+2]-column [L]；
Step 107, X [L-1] and X [L+1] are made comparisons with threshold value T respectively；
Step 108, if X [L-1]>T, then L-1 be classified as safety line left hand edge row, otherwise continue to move to left detection, until finding
Left hand edge arranges；
Step 109, if X [L+1]>T, then L+1 be classified as safety line right hand edge row, otherwise continue to move to right detection, until finding
Right hand edge arranges.
If specifically, X [L]<T, then it is each to the left and right to move a row, calculate X [L-1]=column [L-2]-column [L] and
X [L+1]=column [L+2]-column [L].X [L-1] and X [L+1] are made comparisons with threshold value T respectively, if X [L-1]>T,
Then L-1 is classified as safety line left hand edge row, otherwise continues to move to left detection, until finding left hand edge row；If X [L+1]>Then L+1 is classified as T
Safety line right hand edge arranges, and otherwise continues to move to right detection, until finding right hand edge row；Finally calculated according to the row number of two edge columns
Go out bank note safety line width Ws.
Embodiment three
With reference to figure 4, Fig. 4 is the flow diagram for the method that the embodiment of the present invention obtains bank note safety line boundary.
On the basis of embodiment one or embodiment two, on the basis of embodiment one, the method further includes：
Step 110, the width W=L2- of the safety line is obtained according to the position coordinates of the left and right edges of the safety line
L1-2, L1 are the left hand edge of the safety line, and L2 is the right hand edge of the safety line；
Step 111, the width W is compared with the safety line width range of normal bank note；
Step 112, if the W is within the safety line width range of the normal bank note, it is determined that the safety line is
Normally；
Step 113, if the W is except the safety line width range of the normal bank note, it is determined that the safety line is
Abnormal.
Specifically, obtained bank note safety line width Ws is compared with the safety line width range of normal bank note, if
Then illustrate that the safety line of the bank note is complete in normal range (NR), if it is less than the range, then proves the safety line of the bank note
There is breakage.
Example IV
With reference to figure 5, Fig. 5 is the high-level schematic functional block diagram for the device that the embodiment of the present invention obtains bank note safety line boundary.
In example IV, the device for obtaining bank note safety line boundary includes：
Interception module 501, the region for intercepting bank note safety line to be detected；
Preferably, with reference to figure 6, Fig. 6 is the high-level schematic functional block diagram of interception module of the embodiment of the present invention 501.
Interception unit 601, for the infrared transmission figure according to bank note to be detected and the region towards interception safety line；
Interception unit 601, is used for：
The back sides the BD reversed image for selecting bank note to be detected, the regional extent that safety line is intercepted under 100dpi resolution ratio are
X[320：410], [1 Y；end].
First acquisition module 502, the gray value information for obtaining the region, and obtained according to the gray value information
The sum of the gray value of each row；
Specifically, with reference to figure 2, Fig. 2 is the schematic diagram of bank note safety line Gray Projection of the embodiment of the present invention.To safety line area
The row of gray value are done to projection in domain, calculate the sum of the gray value of each row column [i].
Second acquisition module 503, for obtaining the corresponding position coordinates of gray value minimum in the sum of described gray value；
Specifically, the corresponding row number of minimum value for determining column [i] is L (multiple row is identical to take first), arranged on the basis of L,
X [L]=column [L-1]-column [L+1] is calculated, compared with threshold value T.
Third acquisition module 504 obtains the bank note for the corresponding position coordinates of gray value according to the minimum and pacifies
The position coordinates of the left hand edge of all fronts；
Preferably, with reference to figure 7, Fig. 7 is the high-level schematic functional block diagram of third of embodiment of the present invention acquisition module 504.It is described
Third acquisition module 504, including：
First acquisition unit 701, for from the corresponding position coordinates of gray value of the minimum, obtaining position coordinates most
Small row coordinate L；
First computing unit 702, for calculating X [L]=column [L-1]-column [L+1], by the X [L] and in advance
The threshold value T being first arranged compares, wherein the column [L+1] is the sum of corresponding gray values of row coordinate L+1, the column
[L-1] is the sum of corresponding gray values of row coordinate L-1；
First determination unit 703, if being used for X [L]>T, it is determined that the position coordinates of the left hand edge of the bank note safety line are
L。
Preferably, with reference to figure 8, Fig. 8 is the high-level schematic functional block diagram of third of embodiment of the present invention acquisition module 504.It is described
Third acquisition module 504, including：
Second computing unit 801, if the position coordinates of the left hand edge for the bank note safety line are L, according to setting in advance
The step-length m set calculates X [L+m]=column [L+m+1]-column [L+m-1]；
Comparing unit 802, for comparing X [L+m] and threshold value T；
Second determination unit 803, if being used for X [L+m]>T, it is determined that L+m is classified as the right hand edge of the bank note safety line；If
X [L+m]≤T then continues to move to right the X [L+m+1] for calculating next column, the right hand edge until finding the bank note safety line.
If specifically, X [L]>T, then L be classified as safety line edge columns, and be left hand edge.In view of the safety of 05 millboard coin
Line normal width arranges left and right, therefore 5 row that can directly move right for 10, X [L+5]=column [L+4]-column [L+6]
Compare with threshold value T, X [L+5]>Then L+5 is classified as right hand edge to T, which is Ws=(L+5)-L=5, is otherwise continued
The X [L+i] for calculating next column is moved to right, it is wide with calculating bank note safety line according to the row number of two edge columns until finding right hand edge
Spend Ws.
4th acquisition module 505, the right for obtaining the bank note safety line according to the position coordinates of the left hand edge
The position coordinates of edge.
The region that the embodiment of the present invention passes through interception bank note safety line to be detected；The gray value information in the region is obtained,
And the sum of the gray value of each row is obtained according to the gray value information；Obtain gray value pair minimum in the sum of described gray value
The position coordinates answered；The position of the left hand edge of the bank note safety line is obtained according to the corresponding position coordinates of gray value of the minimum
Set coordinate；The position coordinates of the right hand edge of the bank note safety line are obtained according to the position coordinates of the left hand edge.Profit of the invention
With the certain minimum feature of the gray value where safety line, and it is small according to safety line width itself, lookup amount is few the features such as, design
New bank note safety line integrality detection method, using gray value row projection method, obtain the feature of safety line；Utilize ash
Angle value low order column one is scheduled on this stabilization, apparent safe line position of feature Primary Location in safety line, and it is accurate to improve
Rate excludes noise jamming；The present invention be from minimum value row to the left and right sides small range search, curve steep part lookup simultaneously
It will not be influenced by curve smoothing part, the special circumstances such as safety line tilts, safety line edge blacks can be excluded to complete
Property detection influence.
Embodiment five
With reference to figure 9, Fig. 9 is the high-level schematic functional block diagram for the device that the embodiment of the present invention obtains bank note safety line boundary.
On the basis of example IV, described device further includes：
First computing module 506, it is each to the left and right to move a row if being used for X [L]≤T, calculate X [L-1]=column [L-
2]-column [L] and X [L+1]=column [L+2]-column [L]；
First comparison module 507, for X [L-1] and X [L+1] to make comparisons with threshold value T respectively；
First searching module 508, if being used for X [L-1]>T, then L-1 be classified as safety line left hand edge row, otherwise continue to move to left inspection
It surveys, until finding left hand edge row；
Second searching module 509, if being used for X [L+1]>Then L+1 is classified as safety line right hand edge row to T, otherwise continues to move to right inspection
It surveys, until finding right hand edge row.
If specifically, X [L]<T, then it is each to the left and right to move a row, calculate X [L-1]=column [L-2]-column [L] and
X [L+1]=column [L+2]-column [L].X [L-1] and X [L+1] are made comparisons with threshold value T respectively, if X [L-1]>T,
Then L-1 is classified as safety line left hand edge row, otherwise continues to move to left detection, until finding left hand edge row；If X [L+1]>Then L+1 is classified as T
Safety line right hand edge arranges, and otherwise continues to move to right detection, until finding right hand edge row；Finally calculated according to the row number of two edge columns
Go out bank note safety line width Ws.
Embodiment six
With reference to figure 10, Figure 10 is the high-level schematic functional block diagram for the device that the embodiment of the present invention obtains bank note safety line boundary.
On the basis of example IV or embodiment five, on the basis of example IV, described device further includes：
5th acquisition module 510, the position coordinates for the left and right edges according to the safety line obtain the safety line
Width W=L2-L1-2, L1 is the left hand edge of the safety line, and L2 is the right hand edge of the safety line；
Second comparison module 511, for the width W to be compared with the safety line width range of normal bank note；
First determining module 512, if for the W within the safety line width range of the normal bank note, it is determined that
The safety line is normal；
Second determining module 513, if for the W except the safety line width range of the normal bank note, it is determined that
The safety line is abnormal.
Specifically, obtained bank note safety line width Ws is compared with the safety line width range of normal bank note, if
Then illustrate that the safety line of the bank note is complete in normal range (NR), if it is less than the range, then proves the safety line of the bank note
There is breakage.
The technical principle of the embodiment of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain this
The principle of inventive embodiments, and it cannot be construed to the limitation to protection domain of the embodiment of the present invention in any way.Based on herein
Explanation, those skilled in the art, which would not require any inventive effort, can associate the other specific of the embodiment of the present invention
Embodiment, these modes are fallen within the protection domain of the embodiment of the present invention.
Claims (8)
1. a kind of method obtaining bank note safety line boundary, which is characterized in that the method includes：
Intercept the region of bank note safety line to be detected；
The gray value information in the region is obtained, and obtains the sum of the gray value of each row according to the gray value information；
Obtain the corresponding position coordinates of gray value minimum in the sum of described gray value；
The position coordinates of the left hand edge of the bank note safety line are obtained according to the corresponding position coordinates of gray value of the minimum；
The position coordinates of the right hand edge of the bank note safety line are obtained according to the position coordinates of the left hand edge；
Wherein, the corresponding position coordinates of gray value according to the minimum obtain the position of the left hand edge of the bank note safety line
Coordinate is set, including：
From the corresponding position coordinates of gray value of the minimum, the row coordinate L of position coordinates minimum is obtained；
X [L]=column [L-1]-column [L+1] is calculated, the X [L] and pre-set threshold value T are compared, wherein institute
It is the sum of corresponding gray values of row coordinate L+1 to state column [L+1], and the column [L-1] is the corresponding gray scales of row coordinate L-1
The sum of value；
If X [L]>T, it is determined that the position coordinates of the left hand edge of the bank note safety line are L；
Wherein, the method further includes：
If X [L]≤T, each shifting one to the left and right arranges, calculating X [L-1]=column [L-2]-column [L] and X [L+1]=
column[L+2]-column[L]；
X [L-1] and X [L+1] are made comparisons with threshold value T respectively；
If X [L-1]>T, then L-1 be classified as safety line left hand edge row, otherwise continue to move to left detection, until find left hand edge arrange；
If X [L+1]>Then L+1 is classified as safety line right hand edge row to T, otherwise continues to move to right detection, until finding right hand edge row.
2. according to the method described in claim 1, it is characterized in that, the region of interception bank note safety line to be detected, including：
According to the infrared transmission figure of bank note to be detected and towards the region for intercepting safety line；
The infrared transmission figure according to bank note to be detected and the region towards interception safety line, including：
The back sides the BD reversed image for selecting bank note to be detected, the regional extent that safety line is intercepted under 100dpi resolution ratio are X
[320:410], [1 Y；end].
3. according to the method described in claim 1, it is characterized in that, the corresponding position of the gray value according to the minimum is sat
Mark obtains the position coordinates of the left hand edge of the bank note safety line, including：
If the position coordinates of the left hand edge of the bank note safety line are L, according to pre-set step-length m, calculate X [L+m]=
column[L+m+1]-column[L+m-1]；
X [L+m] and threshold value T are compared；
If X [L+m]>T, then L+m be classified as the right hand edge of the bank note safety line；
If X [L+m]≤T, continue to move to right the X [L+m+1] for calculating next column, the right until finding the bank note safety line
Edge.
4. according to the method described in claims 1 to 3 any one, which is characterized in that the method further includes：
It is described that the width W=L2-L1-2, L1 of the safety line are obtained according to the position coordinates of the left and right edges of the safety line
The left hand edge of safety line, L2 are the right hand edge of the safety line；
The width W is compared with the safety line width range of normal bank note；
If the W is within the safety line width range of the normal bank note, it is determined that the safety line is normal；
If the W is except the safety line width range of the normal bank note, it is determined that the safety line is abnormal.
5. a kind of device obtaining bank note safety line boundary, which is characterized in that described device includes：
Interception module, the region for intercepting bank note safety line to be detected；
First acquisition module, the gray value information for obtaining the region, and each row are obtained according to the gray value information
The sum of gray value；
Second acquisition module, for obtaining the corresponding position coordinates of gray value minimum in the sum of described gray value；
Third acquisition module, the left side for obtaining the bank note safety line according to the corresponding position coordinates of gray value of the minimum
The position coordinates at edge；
4th acquisition module, the position of the right hand edge for obtaining the bank note safety line according to the position coordinates of the left hand edge
Coordinate；
Wherein, the third acquisition module, including：
First acquisition unit, for from the corresponding position coordinates of gray value of the minimum, obtaining the row of position coordinates minimum
Coordinate L；
First computing unit, for calculating X [L]=column [L-1]-column [L+1], by the X [L] and pre-set
Threshold value T compares, wherein the column [L+1] is the sum of corresponding gray values of row coordinate L+1, and the column [L-1] is row
The sum of corresponding gray values of coordinate L-1；
First determination unit, if being used for X [L]>T, it is determined that the position coordinates of the left hand edge of the bank note safety line are L；
Wherein, described device further includes：
First computing module, it is each to the left and right to move a row if being used for X [L]≤T, calculate X [L-1]=column [L-2]-
Column [L] and X [L+1]=column [L+2]-column [L]；
First comparison module, for X [L-1] and X [L+1] to make comparisons with threshold value T respectively；
First searching module, if being used for X [L-1]>T, then L-1 be classified as safety line left hand edge row, otherwise continue to move to left detection, until
Find left hand edge row；
Second searching module, if being used for X [L+1]>Then L+1 is classified as safety line right hand edge row to T, otherwise continues to move to right detection, until
Find right hand edge row.
6. device according to claim 5, which is characterized in that the interception module, including：
Interception unit, for the infrared transmission figure according to bank note to be detected and the region towards interception safety line；
Interception unit is used for：
The back sides the BD reversed image for selecting bank note to be detected, the regional extent that safety line is intercepted under 100dpi resolution ratio are X
[320:410], [1 Y；end].
7. device according to claim 5, which is characterized in that the third acquisition module, including：
Second computing unit, if the position coordinates of the left hand edge for the bank note safety line are L, according to pre-set step-length
M calculates X [L+m]=column [L+m+1]-column [L+m-1]；
Comparing unit, for comparing X [L+m] and threshold value T；
Second determination unit, if being used for X [L+m]>T, it is determined that L+m is classified as the right hand edge of the bank note safety line；If X [L+m]
≤ T then continues to move to right the X [L+m+1] for calculating next column, the right hand edge until finding the bank note safety line.
8. according to the device described in claim 5 to 7 any one, which is characterized in that described device further includes：
5th acquisition module, the width W for obtaining the safety line according to the position coordinates of the left and right edges of the safety line
=L2-L1-2, L1 are the left hand edge of the safety line, and L2 is the right hand edge of the safety line；
Second comparison module, for the width W to be compared with the safety line width range of normal bank note；
First determining module, if for the W within the safety line width range of the normal bank note, it is determined that the safety
Line is normal；
Second determining module, if for the W except the safety line width range of the normal bank note, it is determined that the safety
Line is abnormal.
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| WO2017168592A1 (en) * | 2016-03-29 | 2017-10-05 | グローリー株式会社 | Valuable document processing apparatus and valuable document processing method |
| CN106127930B (en) * | 2016-06-17 | 2019-02-01 | 深圳怡化电脑股份有限公司 | A kind of method and system detecting banknote security line integrality |
| CN106373254B (en) * | 2016-08-24 | 2019-04-26 | 深圳怡化电脑股份有限公司 | The localization method and device of magnetic security line |
| CN106408746B (en) * | 2016-08-25 | 2019-03-12 | 深圳怡化电脑股份有限公司 | A kind of safety line recognition methods and device |
| CN106504409B (en) * | 2016-11-16 | 2019-07-05 | 深圳怡化电脑股份有限公司 | A kind of detection method and device of bank note magnetic security line |
| CN108074318B (en) * | 2016-11-17 | 2020-03-27 | 深圳怡化电脑股份有限公司 | Method and device for identifying paper money |
| CN106780965B (en) * | 2016-12-14 | 2019-03-12 | 深圳怡化电脑股份有限公司 | A kind of Paper Currency Identification and device |
| CN108961200A (en) * | 2017-05-17 | 2018-12-07 | 深圳怡化电脑股份有限公司 | A kind of dust detection method and device |
| CN115147977B (en) * | 2021-03-30 | 2023-12-22 | 深圳怡化电脑股份有限公司 | Paper money discriminating method, paper money discriminating device, electronic equipment and storage medium |
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