CN107463968A - Smog judges the detection method of the production method of code book, generation system and smog - Google Patents

Smog judges the detection method of the production method of code book, generation system and smog Download PDF

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CN107463968A
CN107463968A CN201710742248.9A CN201710742248A CN107463968A CN 107463968 A CN107463968 A CN 107463968A CN 201710742248 A CN201710742248 A CN 201710742248A CN 107463968 A CN107463968 A CN 107463968A
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image block
dimensional image
represent
smog
current
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李鸿燕
王越
张静
张雪英
贾海蓉
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Taiyuan University of Technology
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    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
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    • G06V10/46Descriptors for shape, contour or point-related descriptors, e.g. scale invariant feature transform [SIFT] or bags of words [BoW]; Salient regional features
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Abstract

The present invention discloses the detection method that a kind of smog judges the production method of code book, generation system and smog, and production method includes:Obtain the video of smoke region;Each two field picture of video is divided into by some four-dimensional image blocks using time slip-window, four dimensional features of four-dimensional image block include:The length of four-dimensional image block, width, the static nature of time span and four-dimensional image block;Extract the RGB feature value of each four-dimensional image block;According to the RGB feature value of each four-dimensional image block, based on linear dynamic system framework, high-order dynamic system corresponding to each four-dimensional image block is established;Each high-order dynamic system is clustered, determines that smog judges code book.Because smog provided by the invention judges that code book has taken into full account the RGB feature information of color video, therefore, it is possible to improve the reliability that smog judges code book.Further, judge that code book carries out Smoke Detection using smog provided by the invention, it is possible to increase the reliability and accuracy of detection of Smoke Detection.

Description

Smog judges the detection method of the production method of code book, generation system and smog
Technical field
The present invention relates to detection technique field, production method, the generation system of code book are judged more particularly to a kind of smog And the detection method of smog.
Background technology
Fire is a kind of sudden natural calamity high, destructive power is strong, accidentally will be to people's with fire in production and life Lives and properties cause serious threat.Initial Stage of Fire, smog occur prior to flame, and therefore, the smoke detection of high reliability can For evacuating personnel and fight a fire and strive for more valuable times.
The existing smoke detection system based on smog static nature mainly by the color of smog, texture, circularity, It is fuzzy to wait static nature or different static natures are combined to judge whether smog.But the above method is but neglected The dynamic characteristic of smog in fire has been omited, it is relatively low so as to reduce the reliability of smoke detection system.
For drawbacks described above, there is smog dynamic detection system, the brightness value of the smog changed over time modeled, Smog is judged whether by the change of brightness value.But the existing smog dynamic detection system based on brightness value is carried The smoke characteristics taken are excessively simple, so as to cause its reliability relatively low.
Therefore, how to provide a kind of high reliability, for judging whether that the smog of smog judges code book, turn into this The technical problem of art personnel's urgent need to resolve.
The content of the invention
It is an object of the invention to provide the detection side that a kind of smog judges the production method of code book, generation system and smog Method, it is possible to increase smog judges the reliability of code book, and then can further improve the reliability of Smoke Detection.
To achieve the above object, the invention provides following scheme:
A kind of smog judges the production method of code book, and the production method includes:
Obtain the video of smoke region;
Each two field picture of the video is divided into by some four-dimensional image blocks, the four-dimensional image block using time slip-window Four dimensional features include:The length of four-dimensional image block, the width of four-dimensional image block, the time span of four-dimensional image block and four-dimensional figure As the static nature of block, the static nature of the four-dimensional image block includes the RGB feature of four-dimensional image block;
Extract the RGB feature value of each four-dimensional image block;
According to the RGB feature value of each four-dimensional image block, based on linear dynamic system framework, each described four are established Tie up high-order dynamic system corresponding to image block;
Each high-order dynamic system is clustered, determines that smog judges code book, the smog judge code book for containing The high-order dynamic system of smog information.
Optionally, the high-order dynamic system is:
xRGB(t+1)=AhxRGB(t)+v(t)
Wherein, xRGB(t) the four-dimensional image block during, time evolution low-profile corresponding with current four-dimensional image block is represented Static nature value, t represent the time, xRGB(t)=(xR(t) xG(t) xB(t))T, xR(t) represent and current four-dimensional image block pair The characteristic value of the R component of four-dimensional image block during answer, time evolution low-profile, xG(t) represent and current four-dimensional image block The characteristic value of the G components of four-dimensional image block during corresponding, time evolution low-profile, xB(t) represent and current four-dimensional image The characteristic value of the B component of four-dimensional image block corresponding to block, during time evolution low-profile, AhRepresent multidate information matrix, v (t) Normal Distribution is representedNoise,Noise v (t) variance is represented,Represent current four-dimensional The static nature value of image block,Represent to work as The characteristic value of the R component of preceding four-dimensional image block,The characteristic value of the G components of current four-dimensional image block is represented,Table Show the characteristic value of the B component of current four-dimensional image block,Represent the time span of time span and current four-dimensional image block The average of the static nature of each four-dimensional image block of identical, Time span and the average of the R component characteristic value of each four-dimensional image block of time span identical of current four-dimensional image block are represented,Represent the G component characterization values of time span and each four-dimensional image block of time span identical of current four-dimensional image block Average,Represent the B component of time span and each four-dimensional image block of time span identical of current four-dimensional image block The average of characteristic value, ChStatic information matrix is represented, w (t) represents Normal DistributionNoise,Expression is made an uproar Sound w (t) variance.
Optionally, the static nature of the four-dimensional image block also histograms of oriented gradients including the four-dimensional image block is special Sign.
Optionally, the high-order dynamic system is:
xRGBH(t+1)=AhxRGBH(t)+v(t)
Wherein, xRGBH(t) the quiet of the four-dimensional image block during, time evolution low-profile corresponding with current four-dimensional image block is represented State characteristic value, t represent time, xRGBH(t)=(xR(t) xG(t) xB(t) xH(t))T, xR(t) represent corresponding with current four-dimensional image block , the characteristic value of the R component of four-dimensional image block during time evolution low-profile, xG(t) represent it is corresponding with current four-dimensional image block, The characteristic value of the G components of four-dimensional image block during time evolution low-profile, xB(t) represent it is corresponding with current four-dimensional image block, when Between four-dimensional image block during evolution low-profile B component characteristic value, xH(t), the time corresponding with current four-dimensional image block is represented The characteristic value of the histograms of oriented gradients of four-dimensional image block during evolution low-profile, AhMultidate information matrix is represented, v (t) is represented Normal DistributionNoise,Noise v (t) variance is represented,Represent current four-dimensional image block Static nature value, The characteristic value of the R component of current four-dimensional image block is represented,The characteristic value of the G components of current four-dimensional image block is represented,The characteristic value of the B component of current four-dimensional image block is represented,Represent the direction gradient of current four-dimensional image block The characteristic value of histogram,Represent each four-dimensional image of time span identical of time span and current four-dimensional image block The average of the static nature of block,During expression Between span and current four-dimensional image block each four-dimensional image block of time span identical R component characteristic value average, Time span and the average of the G component characterization values of each four-dimensional image block of time span identical of current four-dimensional image block are represented,Represent the B component characteristic value of time span and each four-dimensional image block of time span identical of current four-dimensional image block Average,Represent the direction ladder of time span and each four-dimensional image block of time span identical of current four-dimensional image block Spend the average of histogram feature value, ChStatic information matrix is represented, w (t) represents Normal DistributionNoise, Represent noise w (t) variance.
A kind of smog judges the generation system of code book, and the generation system includes:
Smog video acquiring module, for obtaining the video of smoke region;
Image block division module, for each two field picture of the video to be divided into some four-dimensional figures using time slip-window As block, four dimensional features of the four-dimensional image block include:The length of four-dimensional image block, the width of four-dimensional image block, four-dimensional image The time span of block and the static nature of four-dimensional image block, the static nature of the four-dimensional image block include four-dimensional image block RGB feature;
Characteristics extraction module, for extracting the RGB feature value of each four-dimensional image block;
High-order dynamic system establishes module, for the RGB feature value according to each four-dimensional image block, based on linear dynamic State system framework, establish high-order dynamic system corresponding to each four-dimensional image block;
Code book determining module, for each high-order dynamic system to be clustered, determine that smog judges code book, the cigarette Mist judges code book for the high-order dynamic system containing smog information.
A kind of detection method of smog, the detection method include:
The linear dynamic system of video and smog video to be detected is obtained, the video to be detected includes each frame mapping to be checked Picture;
The characteristic value of the static nature of image to be detected described in each frame is extracted, the static nature of described image to be detected includes The RGB feature of image and the histograms of oriented gradients feature of image;
According to the characteristic value of the static nature of image to be detected described in each frame, based on linear dynamic system framework, establish High-order dynamic system corresponding to image to be detected described in each frame;
According to formula:RTPR-P=-QTQ, determine that high-order dynamic system corresponding to each described image to be detected is sentenced with smog The similarity measure values of any high-order dynamic system in short in size book, wherein, the smog judge code book for according to claim 1~ Smog caused by production method described in 4 any one judges code book,Treated described in expression The multidate information matrix to be measured of high-order dynamic system corresponding to detection image,Represent that high-order corresponding to described image to be detected moves The static information matrix to be measured of state system,Represent that smog judges the judgement multidate information square of any high-order dynamic system in code book Battle array,Represent the judgement static information matrix of high-order dynamic system corresponding with the judgement multidate information matrix;
The similarity measure values of the similar threshold value less than setting are judged whether, obtain the first judged result;
If the first judged result represents the similarity measure values that the similar threshold value less than setting be present, it is determined that described to be checked Smog be present in altimetric image;
If the first judged result represents that the similarity measure values of the similar threshold value less than setting are not present, it is determined that described to treat Smog is not present in detection image;
Optionally, it is described according to formula:RTPR-P=-QTQ, determine high-order dynamic corresponding to each described image to be detected System judges the similarity measure values of any high-order dynamic system in code book with smog, specifically includes:
According to formula:RTPR-P=-QTQ, the multidate information matrix to be measured, the static information matrix to be measured, described sentence Disconnected multidate information matrix and the judgement static information matrix, determine matrix P,
According to formula:Similarity measure values are determined, wherein,Represent similarity measure values, λiTable Show matrixIth feature value.
According to specific embodiment provided by the invention, the invention discloses following technique effect:
Each two field picture of smog video is divided into multiple four-dimensional image blocks by the present invention using time slip-window, is then established The high-order dynamic system of each four-dimensional image block comprising RGB feature, passes through the high-order dynamic of each four-dimensional image block of clustering System, obtain for judging whether that the smog of smog judges code book.Because smog provided by the invention judges that code book is abundant The RGB feature information of color video is considered, therefore, it is possible to improve the reliability that smog judges code book.Further, using this The smog that invention provides judges that code book carries out Smoke Detection, it is possible to increase the reliability and accuracy of detection of Smoke Detection.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings Obtain other accompanying drawings.
Fig. 1 is the flow chart for the production method that the smog that the embodiment of the present invention 1 provides judges code book;
Fig. 2 is the structured flowchart for the generation system that the smog that the embodiment of the present invention 2 provides judges code book;
Fig. 3 is the flow chart of the detection method for the smog that the embodiment of the present invention 3 provides;
Fig. 4 is the structural representation for the four-dimensional image block that the embodiment of the present invention 3 provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.
It is an object of the invention to provide the detection side that a kind of smog judges the production method of code book, generation system and smog Method, it is possible to increase smog judges the reliability of code book, and then can further improve the reliability of Smoke Detection.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real Applying mode, the present invention is further detailed explanation.
Embodiment 1:
As shown in figure 1, a kind of smog judges that the production method of code book includes:
Step 11:Obtain the video of smoke region;
Step 12:Each two field picture of the video is divided into by some four-dimensional image blocks using time slip-window, described four Four dimensional features of dimension image block include:The length of four-dimensional image block, the width of four-dimensional image block, the time span of four-dimensional image block With the static nature of four-dimensional image block, the static nature of the four-dimensional image block includes the RGB feature of four-dimensional image block;
Step 13:Extract the RGB feature value of each four-dimensional image block;
Step 14:According to the RGB feature value of each four-dimensional image block, based on linear dynamic system framework, establish every High-order dynamic system corresponding to the one four-dimensional image block;
Step 15:Each high-order dynamic system is clustered, determines that smog judges code book, the smog judges code book For the high-order dynamic system containing smog information.In the present embodiment, using K- central points (K-medoids) algorithm by each institute The high-order dynamic system for stating four-dimensional image block carries out clustering, and obtained cluster result includes three classes, and one kind is free of smog, separately One kind contain smog, also have it is a kind of include from color and move composition similar with smog for above, using the cluster containing smog as Final smog judges code book.
Wherein, the high-order dynamic system established in step 14 is:
xRGB(t+1)=AhxRGB(t)+v(t)
Wherein, xRGB(t) the four-dimensional image block during, time evolution low-profile corresponding with current four-dimensional image block is represented Static nature value, t represent the time, xRGB(t)=(xR(t) xG(t) xB(t))T, xR(t) represent and current four-dimensional image block pair The characteristic value of the R component of four-dimensional image block during answer, time evolution low-profile, xG(t) represent and current four-dimensional image block The characteristic value of the G components of four-dimensional image block during corresponding, time evolution low-profile, xB(t) represent and current four-dimensional image The characteristic value of the B component of four-dimensional image block corresponding to block, during time evolution low-profile, AhRepresent multidate information matrix, v (t) Normal Distribution is representedNoise,Noise v (t) variance is represented,Represent current four The static nature value of image block is tieed up,Table Show the characteristic value of the R component of current four-dimensional image block,The characteristic value of the G components of current four-dimensional image block is represented, The characteristic value of the B component of current four-dimensional image block is represented,Represent the time span of time span and current four-dimensional image block The average of the static nature of each four-dimensional image block of identical, Time span and the average of the R component characteristic value of each four-dimensional image block of time span identical of current four-dimensional image block are represented,Represent time span and the G component characterization values of each four-dimensional image block of time span identical of current four-dimensional image block Average,Represent that the B component of time span and each four-dimensional image block of time span identical of current four-dimensional image block is special The average of value indicative, ChStatic information matrix is represented, w (t) represents Normal DistributionNoise,Represent noise w (t) variance.
Preferably, direction ladder of the static nature of the four-dimensional image block in step 12 also including the four-dimensional image block Histogram feature is spent, i.e., the static nature of described four-dimensional image block includes the RGB feature of four-dimensional image block and the four-dimensional image The histograms of oriented gradients feature of block, corresponding high-order dynamic system are:
xRGBH(t+1)=AhxRGBH(t)+v(t)
Wherein, xRGBH(t) the four-dimensional image block during, time evolution low-profile corresponding with current four-dimensional image block is represented Static nature value, t represent the time, xRGBH(t)=(xR(t) xG(t) xB(t) xH(t))T, xR(t) represent and current four-dimensional image The characteristic value of the R component of four-dimensional image block corresponding to block, during time evolution low-profile, xG(t) represent and current four-dimensional image block The characteristic value of the G components of four-dimensional image block during corresponding, time evolution low-profile, xB(t) represent and current four-dimensional image block pair The characteristic value of the B component of four-dimensional image block during answer, time evolution low-profile, xH(t) represent corresponding with current four-dimensional image block , the characteristic value of the histograms of oriented gradients of four-dimensional image block during time evolution low-profile, AhRepresent multidate information matrix, v (t) Represent Normal DistributionNoise,Noise v (t) variance is represented,Represent current four-dimensional image block Static nature value, The characteristic value of the R component of current four-dimensional image block is represented,The characteristic value of the G components of current four-dimensional image block is represented,The characteristic value of the B component of current four-dimensional image block is represented,Represent the direction gradient of current four-dimensional image block The characteristic value of histogram,Represent each four-dimensional image of time span identical of time span and current four-dimensional image block The average of the static nature of block,During expression Between span and current four-dimensional image block each four-dimensional image block of time span identical R component characteristic value average, Time span and the average of the G component characterization values of each four-dimensional image block of time span identical of current four-dimensional image block are represented,Represent the B component characteristic value of time span and each four-dimensional image block of time span identical of current four-dimensional image block Average,Represent the direction ladder of time span and each four-dimensional image block of time span identical of current four-dimensional image block Spend the average of histogram feature value, ChStatic information matrix is represented, w (t) represents Normal DistributionNoise, Represent noise w (t) variance.
In order to lift the high efficiency and reliability that smog judges code book, it is (red that the present invention introduces RGB in four-dimensional image block (R), green (G), blue (B) three passages) feature and histograms of oriented gradients (Histogram of Oriented Gradient, HOG) feature, avoid and the problem of intensive sampling occur, and add the dimension of image block, improve image texture characteristic point The reliability of analysis, amount of calculation are small.
Embodiment 2:
As shown in Fig. 2 a kind of smog judges that the generation system of code book includes:
Smog video acquiring module 21, for obtaining the video of smoke region;
Image block division module 22, for each two field picture of the video to be divided into some four-dimension using time slip-window Image block, four dimensional features of the four-dimensional image block include:The length of four-dimensional image block, the width of four-dimensional image block, four-dimensional figure As the time span of block and the static nature of four-dimensional image block, the static nature of the four-dimensional image block includes four-dimensional image block RGB feature;
Characteristics extraction module 23, for extracting the RGB feature value of each four-dimensional image block;
High-order dynamic system establishes module 24, for the RGB feature value according to each four-dimensional image block, based on linear Dynamical system framework, establish high-order dynamic system corresponding to each four-dimensional image block;
Code book determining module 25, for each high-order dynamic system to be clustered, determine that smog judges code book, it is described Smog judges code book for the high-order dynamic system containing smog information.In the present embodiment, using K- central points (K- Medoids) algorithm carries out clustering to each high-order dynamic system.
The present invention introduces RGB (red (R), green (G), blue (B) three passages) features and direction gradient in four-dimensional image block Histogram (HistogramofOrientedGradient, HOG) feature, has taken into full account the textural characteristics of smog, therefore, leads to The system for crossing the present embodiment offer, the smog that can establish high reliability judge code book.
Embodiment 3:
As shown in figure 3, a kind of detection method of smog includes:
Step 31:The linear dynamic system of video and smog video to be detected is obtained, the video to be detected includes each frame Image to be detected;
Step 32:Extract the characteristic value of the static nature of image to be detected described in each frame, the static state of described image to be detected Feature includes the RGB feature of image and the histograms of oriented gradients feature of image;
Step 33:According to the characteristic value of the static nature of image to be detected described in each frame, based on linear dynamic system frame Frame, establish high-order dynamic system corresponding to image to be detected described in each frame;
Step 34:According to formula:RTPR-P=-QTQ, determine high-order dynamic system corresponding to each described image to be detected The similarity measure values of any high-order dynamic system in code book are judged with smog, wherein, the smog judges code book for according to reality Smog caused by applying the production method described in example 1 judges code book,Represent described to be checked The multidate information matrix to be measured of high-order dynamic system corresponding to altimetric image,Represent high-order dynamic corresponding to described image to be detected The static information matrix to be measured of system,Represent that smog judges the judgement multidate information square of any high-order dynamic system in code book Battle array,Represent the judgement static information matrix of high-order dynamic system corresponding with the judgement multidate information matrix;
Step 35:The similarity measure values of the similar threshold value less than setting are judged whether, obtain the first judged result;
If the first judged result represents the similarity measure values that the similar threshold value less than setting be present, step 36 is performed;
If the first judged result represents that the similarity measure values of the similar threshold value less than setting are not present, step is performed 37;
Step 36:Then determine that described image to be detected has smog;
Step 37:Then determine that smog is not present in described image to be detected;
Specifically, step 34 specifically includes:
Step 341:According to formula:RTPR-P=-QTQ, the multidate information matrix to be measured, the static information square to be measured Battle array, the judgement multidate information matrix and the judgement static information matrix, determine matrix
Step 342:According to formula:Similarity measure values are determined, wherein,Represent similarity measurement Value, λiRepresenting matrixIth feature value.
In the present embodiment, video sequence pretreatment is carried out before step 31 is performed, in addition to video to be detected.Video Sequence pretreatment is by sport foreground separation and color analysis, first to quiet under motion video image and same camera lens State background is contrasted, and draws the track that moving target moves during camera is shot;Then color is carried out to moving target Analysis and Gaussian smoothing filter, obtain preliminary smog suspected target region.Comprise the following steps that:
1) sport foreground separates
Sport foreground separation using independent component analysis (Independent ComponentAnalysis, ICA) technology and Vision significance (Graph-BasedVisual Saliency, GBVS) based on figure carries out smoke foreground separation.Sport foreground Separation first uses improved ICA moving objects identification model initial gross separation smoke foreground region in smog separation phase, then passes through GBVS determines smoke foreground marking area.
2) color analysis
At the initial stage that fire occurs, because temperature is than relatively low, object often burns not enough fully, can produce linen cigarette Mist.Smog itself is translucent, and for smog often than sparse, this can cause background image to fog during just generation;With Smoke density increase, background image all cover from translucent to by smog, and background image loses original color characteristic, institute So that smog can be judged whether according to color characteristic.
Under RGB color model, the gray value of tri- components of R, G, B of smog is fairly close, so if meet simultaneously Following two conditions, then it is assumed that the pixel meets the color characteristic of smog:
Condition 1:Still equal, i.e. h three components of RGB color model increase and decrease simultaneously afterR± a=hG± a=hB± a, its In, hRRepresent the gray value of R component, hGRepresent the gray value of G components, hBThe gray value of B component is represented, a represents constant;
Condition 2:It is the I component satisfaction of HSI models after HSI color models by RGB color model conversation:L1≤I≤L2 or Person H1≤I≤H2, wherein, I represents that intensity or brightness, L1, L2, H1, H2 are component I empirical value.
After carrying out above-mentioned video sequence pretreatment, pretreated video to be detected is obtained, Smoke Detection can be reduced Amount of calculation, improve detection speed and detection efficiency.
In the present embodiment, step 33 specifically includes:
Step 331:Establish the linear dynamic system framework (LinearDynamical System, LDS) of smog video:
Averaging model (Auto-Regressive Moving Average, ARMA) is moved based on first-order autoregression, simultaneously The independent identically distributed white Gaussian noise with zero-mean is added, constructs the linear dynamic system framework of a smog video, it is fixed Justice is as follows:
X (t+1)=Ax (t)+v (t) (1)
Wherein, t represents the time, and x (t) expressions are corresponding with the image of present frame, image during time evolution low-profile Grey scale pixel value, and x (t) ∈ Rn, the image pixel gray level value and y (t) ∈ R of y (t) expression present framesd, n expression x (t) centre Status number, d represents the sum of all pixels of current video image, and n≤d, A represent transition matrix and A ∈ Rn×n, C expression mapping matrixes And C ∈ Rd×n, R expression real number fields, v (t) and w (t) represent caused noise in image generation process, v (t) expression obedience normal states DistributionNoise, w (t) represent Normal DistributionNoise, wherein,Represent noise v (t) side Difference,Noise w (t) variance is represented,Represent video in each two field picture pixel grey scale average and
Formula (1) illustrates the recurrence relation of adjacent time evolution low-profile process, and it is each time that formula (2), which illustrates y (t), Evolution low-profile process x (t) linear expression, i.e. matrix A and C determine the linear dynamic system framework of smog video.
When handling multitude of video sequences, it is necessary to first solve A and C to estimate the linear dynamic system of smog video (LDS) Framework, then carry out intensive sampling.However, be not that each sample image is effective in video to be measured, for example smog occurs early Phase is either apart from distant and cause the smog that photographs than leaner, therefore the video photographed is more fuzzy.If will This fuzzy video also serves as sample process, it will causes amount of calculation excessive.To overcome this limitation, while in order to determine image The specific time that the accurate location and smog of middle smog occur, a 3-D view block, long a width of N × N are established, time span is F, with Y ∈ RN×N×FTo represent, such as formula (3):
Y=[ypatch(1),ypatch(2),…,ypatch(F)] (3)
In formula (3), Y represents 3-D view block collection, ypatch(t)∈RN×N(t=1,2 ..., F) represent each 3-D view The gray value of block output, can be obtained by formula (2):
In the linear dynamic system framework of smog video, matrix A and C solution procedure are as follows:
First construct a zero-mean matrix:
In formula (5),Represent the gray average of each 3-D view block.
To Y0Singular value decomposition is carried out, is obtained:
Y0=USVT (6)
In formula (6), U is d rank reality unitary matrice, and d represents the sum of all pixels of current video image, and S represents that d × F ranks are diagonal Matrix, F represent image block time span, and the element in S on diagonal is Y0Singular value, VTIt is V transposition, V is the F rank reality tenth of the twelve Earthly Branches Matrix.
It can be obtained by formula (4) and formula (5):
Y0=CX (7)
Wherein, X=[x (1), x (2) ..., x (F)].
It can be obtained by formula (6) and formula (7):
C=U (8)
Make X=[x (1) ..., x (F)], X1=[x (1) ..., x (F-1)], X2=[x (2), x (3) ..., x (F)], then:
Therefore, the linear dynamic system framework of smog video can be expressed as:MLDS=(A, C).
Step 332:Establish high order linear dynamical system (the Higher order-Linear Dynamical of smog video System, h-LDS)
The high order linear dynamical system framework (h-LDS) of smog video can improve the reliability and drop of dynamic Feature Analysis Low amount of calculation.Each two field picture of video is divided into the equal subsequence in some intervals by h-LDS using time slip-window, through undue Block, extension obtain four-dimensional image block.Then a tetradic Y is constructedh∈RN×N×M×FTo represent four-dimensional image block, wherein N is The length of side of image block, F are four-dimensional image block time spans, and M represents image static nature.For RGB color video, static nature RGB feature and histograms of oriented gradients feature including four-dimensional image block.The structure for being illustrated in figure 4 four-dimensional spacetime image block is shown It is intended to, wherein the characteristic value of the correspondence image block R component of passage 1, the characteristic value of the correspondence image block G components of passage 2, the correspondence of passage 3 The characteristic value of image block B component, the histograms of oriented gradients characteristic value of the correspondence image block R component of passage 4.
Four-dimensional image block Yh∈RN×N×M×FIt can be expressed as:
In formulaYh∈RN×N×M×F, t=1,2 ..., F.It is similar with LDS, with formula (1) and formula (4) the high-order dynamic system of four-dimensional image block is established.Using high order tensor singular value decomposition (High Order SingularValue Decomposition, HOSVD) method determine comprising image block multidate information and static information square Battle array AhAnd Ch
First YhIn the static nature value of each four-dimensional image block subtract YhIn all four-dimensional image blocks static nature value AverageZero-mean matrix is obtained, formula (6) is copied, then tensor YhDecompose as follows:
S is d × F rank diagonal matrix in formula, UT (1), UT (2)..., UT (k)It is orthogonal matrix, is made up of orthogonal vectors, T is represented It is the T moment, corresponding with time span F, ×i(i=1 ..., k) it is between tensor YhAnd matrix UT (k)Between i states.Therefore, square Battle array Ah, ChIt is not unique, as long as there is suitable primary condition, it will there is numerous solution.
Make X=S ×1UT (1)…×k-1UT (k-1), Ch=UT (k), Ch∈RF×F, then formula (11) can turn to:
(12) formula can be turned to furtherWherein X (k)=X ×kAnd X(k)X k dimension expansions are represented, its Form is consistent with the form of formula (7).
Order:
It can then be obtained with reference to formula (9):
Ah∈RN×N.So transition matrix AhAnd ChAfter all determining, RGB feature is characterized H-LDS models are represented by:
xRGB(t+1)=AhxRGB(t)+v(t) (15)
Wherein, xRGB(t) the four-dimensional image block during, time evolution low-profile corresponding with current four-dimensional image block is represented Static nature value, t represent the time, xRGB(t)=(xR(t) xG(t) xB(t))T, xR(t) represent and current four-dimensional image block pair The characteristic value of the R component of four-dimensional image block during answer, time evolution low-profile, xG(t) represent and current four-dimensional image block The characteristic value of the G components of four-dimensional image block during corresponding, time evolution low-profile, xB(t) represent and current four-dimensional image The characteristic value of the B component of four-dimensional image block corresponding to block, during time evolution low-profile, AhRepresent multidate information matrix, v (t) Normal Distribution is representedNoise,The static nature value of current four-dimensional image block is represented,Represent R points of current four-dimensional image block The characteristic value of amount,The characteristic value of the G components of current four-dimensional image block is represented,Represent current four-dimensional image block B component characteristic value,Represent each four-dimensional image of time span identical of time span and current four-dimensional image block The average of the static nature of block,Represent time span with The average of the R component characteristic value of each four-dimensional image block of time span identical of current four-dimensional image block,Represent the time The average of span and the G component characterization values of each four-dimensional image block of time span identical of current four-dimensional image block,Table Show time span and the average of the B component characteristic value of each four-dimensional image block of time span identical of current four-dimensional image block, Ch Static information matrix is represented, w (t) represents Normal DistributionNoise.
Smog is shown as brilliant white region in the visual image of histograms of oriented gradients (HOG) feature, and the present embodiment is The ability that enhancing high-order dynamic system is handled multi-dimensional image data, while improve the robustness of detection method, in RGB feature On the basis of HOG features are added to the static nature of four-dimensional image block.It is only doubtful to preliminary smog in order to reduce amount of calculation The image zooming-out HOG features of target area, use hpatch(t) the HOG features of image block are represented.With U (t) ∈ Rd×LWith V (t) ∈ RD ×LRepresent respectivelyAnd hpatch(t) base, d represent the sum of all pixels of four-dimensional image block, and D represents direction gradient Nogata Scheme the characteristic dimension of (HOG), L represents coefficient atDimension.AlthoughAnd hpatch(t) base is different, but uses oversubscription Resolution sparse coding and the method for sparse dictionary study can obtain identical coefficient at, represent as follows:
In formula, hpatch(t)∈RDThe HOG features of image block are represented,Represent four-dimensional image block RGB feature.
Therefore, representing the tetradic of four-dimensional image block static nature can be write as again:
Wherein F is the time span of four-dimensional image block,The Y that will newly obtainhSubstitute into formula (11), can obtain static nature include RGB feature and The high order linear dynamical system of HOG features:
xRGBH(t+1)=AhxRGBH(t)+v(t) (18)
Wherein, xRGBH(t) the four-dimensional image block during, time evolution low-profile corresponding with current four-dimensional image block is represented Static nature value, t represent the time, xRGBH(t)=(xR(t) xG(t) xB(t) xH(t))T, xR(t) represent and the current four-dimension The characteristic value of the R component of four-dimensional image block corresponding to image block, during time evolution low-profile, xG(t) represent and current four Tie up the characteristic value of the G components of the four-dimensional image block corresponding to image block, during time evolution low-profile, xB(t) represent and current The characteristic value of the B component of four-dimensional image block corresponding to four-dimensional image block, during time evolution low-profile, xH(t) represent and work as The characteristic value of the histograms of oriented gradients of four-dimensional image block corresponding to preceding four-dimensional image block, during time evolution low-profile, AhTable Show multidate information matrix, v (t) represents Normal DistributionNoise,Represent current four-dimensional image block Static nature value, The characteristic value of the R component of current four-dimensional image block is represented,The characteristic value of the G components of current four-dimensional image block is represented,The characteristic value of the B component of current four-dimensional image block is represented,Represent the direction gradient of current four-dimensional image block The characteristic value of histogram,Represent each four-dimensional image of time span identical of time span and current four-dimensional image block The average of the static nature of block,During expression Between span and current four-dimensional image block each four-dimensional image block of time span identical R component characteristic value average, Time span and the average of the G component characterization values of each four-dimensional image block of time span identical of current four-dimensional image block are represented,Represent the B component characteristic value of time span and each four-dimensional image block of time span identical of current four-dimensional image block Average,Represent the direction ladder of time span and each four-dimensional image block of time span identical of current four-dimensional image block Spend the average of histogram feature value, ChStatic information matrix is represented, w (t) represents Normal DistributionNoise.
The present embodiment is pre-processing smog separation phase, is obtained just using ICA smoke foreground initial gross separation smoke models Smoke foreground is walked, smoke foreground marking area is then obtained by GBVS extraction images multichannel, multiple dimensioned low-level image feature, most Column hisgram contrast is entered to identify smog according to the combinations of features of color and histograms of oriented gradients afterwards, improves foreground target detection The accuracy of separation of the stage to smoke foreground.
The stage is extracted in smoke characteristics, proposes that the smoke characteristics based on multidimensional characteristic analysis extract detection method.This method Smog color and background difference is first passed around to pre-process to obtain smog candidate region, then in four-dimensional image block introduce RGB and HOG features, the high-order decomposition to multi-dimensional image data is finally based on, the behavioral characteristics of smog video is analyzed, due to using slip Time window, it may be determined that the specific time that the accurate location of smog and smog occur in picture, improve smoke characteristics extraction rank The smoke characteristics stability extracted of section it is not high and to the judgment criterion of smog it is excessively simple the shortcomings that, improve dynamic texture spy The reliability of analysis is levied, reduces amount of calculation.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other The difference of embodiment, between each embodiment identical similar portion mutually referring to.For system disclosed in embodiment For, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is said referring to method part It is bright.
Specific case used herein is set forth to the principle and embodiment of the present invention, and above example is said It is bright to be only intended to help the method and its core concept for understanding the present invention;Meanwhile for those of ordinary skill in the art, foundation The thought of the present invention, in specific embodiments and applications there will be changes.In summary, this specification content is not It is interpreted as limitation of the present invention.

Claims (7)

1. a kind of smog judges the production method of code book, it is characterised in that the production method includes:
Obtain the video of smoke region;
Each two field picture of the video is divided into by some four-dimensional image blocks using time slip-window, the four of the four-dimensional image block Dimensional feature includes:The length of four-dimensional image block, the width of four-dimensional image block, the time span and four-dimensional image block of four-dimensional image block Static nature, the static nature of the four-dimensional image block includes the RGB feature of four-dimensional image block;
Extract the RGB feature value of each four-dimensional image block;
According to the RGB feature value of each four-dimensional image block, based on linear dynamic system framework, each four-dimensional figure is established The high-order dynamic system as corresponding to block;
Each high-order dynamic system is clustered, determines that smog judges code book, the smog judges code book to contain smog The high-order dynamic system of information.
2. production method according to claim 1, it is characterised in that the high-order dynamic system is:
xRGB(t+1)=AhxRGB(t)+v(t)
<mrow> <msubsup> <mi>y</mi> <mrow> <mi>p</mi> <mi>a</mi> <mi>t</mi> <mi>c</mi> <mi>h</mi> <mo>-</mo> <mi>R</mi> <mi>G</mi> <mi>B</mi> </mrow> <mi>h</mi> </msubsup> <mo>=</mo> <msubsup> <mover> <mi>y</mi> <mo>&amp;OverBar;</mo> </mover> <mrow> <mi>p</mi> <mi>a</mi> <mi>t</mi> <mi>c</mi> <mi>h</mi> <mo>-</mo> <mi>R</mi> <mi>G</mi> <mi>B</mi> </mrow> <mi>h</mi> </msubsup> <mo>+</mo> <msub> <mi>C</mi> <mi>h</mi> </msub> <msub> <mi>x</mi> <mrow> <mi>R</mi> <mi>G</mi> <mi>B</mi> </mrow> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mo>+</mo> <mi>w</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> </mrow>
Wherein, xRGB(t) the quiet of the four-dimensional image block during, time evolution low-profile corresponding with current four-dimensional image block is represented State characteristic value, t represent time, xRGB(t)=(xR(t) xG(t) xB(t))T, xR(t) represent corresponding with current four-dimensional image block , the characteristic value of the R component of four-dimensional image block during time evolution low-profile, xG(t) represent and current four-dimensional image block pair The characteristic value of the G components of four-dimensional image block during answer, time evolution low-profile, xB(t) represent and current four-dimensional image block The characteristic value of the B component of four-dimensional image block during corresponding, time evolution low-profile, AhRepresent multidate information matrix, v (t) Represent Normal DistributionNoise,Noise v (t) variance is represented,Represent current four-dimensional The static nature value of image block, Represent to work as The characteristic value of the R component of preceding four-dimensional image block,The characteristic value of the G components of current four-dimensional image block is represented, The characteristic value of the B component of current four-dimensional image block is represented,Represent the when span of time span and current four-dimensional image block The average of the static nature of each four-dimensional image block of identical is spent, Represent time span and the R component characteristic value of each four-dimensional image block of time span identical of current four-dimensional image block Average,Represent that the G components of time span and each four-dimensional image block of time span identical of current four-dimensional image block are special The average of value indicative,Represent the B of time span and each four-dimensional image block of time span identical of current four-dimensional image block The average of component characterization value, ChStatic information matrix is represented, w (t) represents Normal DistributionNoise,Table Show noise w (t) variance.
3. production method according to claim 1, it is characterised in that the static nature of the four-dimensional image block also includes institute State the histograms of oriented gradients feature of four-dimensional image block.
4. production method according to claim 3, it is characterised in that the high-order dynamic system is:
xRGBH(t+1)=AhxRGBH(t)+v(t)
<mrow> <msubsup> <mi>y</mi> <mrow> <mi>p</mi> <mi>a</mi> <mi>t</mi> <mi>c</mi> <mi>h</mi> <mo>-</mo> <mi>R</mi> <mi>G</mi> <mi>B</mi> <mi>H</mi> </mrow> <mi>h</mi> </msubsup> <mo>=</mo> <msubsup> <mover> <mi>y</mi> <mo>&amp;OverBar;</mo> </mover> <mrow> <mi>p</mi> <mi>a</mi> <mi>t</mi> <mi>c</mi> <mi>h</mi> <mo>-</mo> <mi>R</mi> <mi>G</mi> <mi>B</mi> <mi>H</mi> </mrow> <mi>h</mi> </msubsup> <mo>+</mo> <msub> <mi>C</mi> <mi>h</mi> </msub> <msub> <mi>x</mi> <mrow> <mi>R</mi> <mi>G</mi> <mi>B</mi> <mi>H</mi> </mrow> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mo>+</mo> <mi>w</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> </mrow> 1
Wherein, xRGBH(t) the quiet of the four-dimensional image block during, time evolution low-profile corresponding with current four-dimensional image block is represented State characteristic value, t represent time, xRGBH(t)=(xR(t) xG(t) xB(t) xH(t))T, xR(t) represent and current four-dimensional image block pair The characteristic value of the R component of four-dimensional image block during answer, time evolution low-profile, xG(t) represent and current four-dimensional image block pair The characteristic value of the G components of four-dimensional image block during answer, time evolution low-profile, xB(t) represent and current four-dimensional image block pair The characteristic value of the B component of four-dimensional image block during answer, time evolution low-profile, xH(t) represent and current four-dimensional image block pair The characteristic value of the histograms of oriented gradients of four-dimensional image block during answer, time evolution low-profile, AhMultidate information matrix is represented, V (t) represents Normal DistributionNoise,Noise v (t) variance is represented,Represent current four-dimensional The static nature value of image block, The characteristic value of the R component of current four-dimensional image block is represented,Represent the spy of the G components of current four-dimensional image block Value indicative,The characteristic value of the B component of current four-dimensional image block is represented,Represent the direction of current four-dimensional image block The characteristic value of histogram of gradients,Represent each four-dimension of time span identical of time span and current four-dimensional image block The average of the static nature of image block, Represent Time span and the average of the R component characteristic value of each four-dimensional image block of time span identical of current four-dimensional image block,Represent time span and the G component characterization values of each four-dimensional image block of time span identical of current four-dimensional image block Average,Represent that the B component of time span and each four-dimensional image block of time span identical of current four-dimensional image block is special The average of value indicative,Represent the side of time span and each four-dimensional image block of time span identical of current four-dimensional image block To the average of histogram of gradients characteristic value, ChStatic information matrix is represented, w (t) represents Normal DistributionMake an uproar Sound,Represent noise w (t) variance.
5. a kind of smog judges the generation system of code book, it is characterised in that the generation system includes:
Smog video acquiring module, for obtaining the video of smoke region;
Image block division module, for each two field picture of the video to be divided into some four-dimensional images using time slip-window Block, four dimensional features of the four-dimensional image block include:The length of four-dimensional image block, the width of four-dimensional image block, four-dimensional image block Time span and four-dimensional image block static nature, the static nature of the four-dimensional image block includes the RGB of four-dimensional image block Feature;
Characteristics extraction module, for extracting the RGB feature value of each four-dimensional image block;
High-order dynamic system establishes module, for the RGB feature value according to each four-dimensional image block, based on linear dynamic system System framework, establishes high-order dynamic system corresponding to each four-dimensional image block;
Code book determining module, for each high-order dynamic system to be clustered, determine that smog judges code book, the smog is sentenced Short in size book is the high-order dynamic system containing smog information.
6. a kind of detection method of smog, it is characterised in that the detection method includes:
The linear dynamic system of video and smog video to be detected is obtained, the video to be detected includes each frame image to be detected;
The characteristic value of the static nature of image to be detected described in each frame is extracted, the static nature of described image to be detected includes image RGB feature and image histograms of oriented gradients feature;
According to the characteristic value of the static nature of image to be detected described in each frame, based on linear dynamic system framework, establish each High-order dynamic system corresponding to image to be detected described in frame;
According to formula:RTPR-P=-QTQ, determine that high-order dynamic system corresponding to each described image to be detected judges code with smog The similarity measure values of any high-order dynamic system in book, wherein, the smog judges code book to appoint according to Claims 1 to 4 Smog caused by production method described in one judges code book, Represent described to be detected The multidate information matrix to be measured of high-order dynamic system corresponding to image,Represent high-order dynamic system corresponding to described image to be detected The static information matrix to be measured of system,Represent that smog judges the judgement multidate information matrix of any high-order dynamic system in code book,Represent the judgement static information matrix of high-order dynamic system corresponding with the judgement multidate information matrix;
The similarity measure values of the similar threshold value less than setting are judged whether, obtain the first judged result;
If the first judged result represents the similarity measure values that the similar threshold value less than setting be present, it is determined that the mapping to be checked As smog be present;
If the first judged result represents that the similarity measure values of the similar threshold value less than setting are not present, it is determined that described to be detected Smog is not present in image;
7. detection method according to claim 6, it is characterised in that described according to formula:RTPR-P=-QTQ, it is determined that often High-order dynamic system corresponding to one described image to be detected judges the similarity measurements of any high-order dynamic system in code book with smog Value, specifically include:
According to formula:RTPR-P=-QTQ, the multidate information matrix to be measured, the static information matrix to be measured, it is described judge it is dynamic State information matrix and the judgement static information matrix, determine matrix P,
According to formula:Similarity measure values are determined, wherein,Represent similarity measure values, λiRepresenting matrixIth feature value.
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