CN109359551A - A kind of nude picture detection method and system based on machine learning - Google Patents

A kind of nude picture detection method and system based on machine learning Download PDF

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CN109359551A
CN109359551A CN201811104850.0A CN201811104850A CN109359551A CN 109359551 A CN109359551 A CN 109359551A CN 201811104850 A CN201811104850 A CN 201811104850A CN 109359551 A CN109359551 A CN 109359551A
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image
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colour
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陈舒
李雄
潘颋璇
向阳
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Shenzhen Xuanji Laboratory Co ltd
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Abstract

The present invention discloses a kind of nude picture detection method based on machine learning, and steps are as follows: S1, system initialization, and setting face accounts for complexion model gravity thresholds；S2, input picture；S3, recognition of face；S4, Face Detection；S5, the nude picture detection based on machine learning.The present invention carries out recognition of face to image, excludes the image for not including face information；Using Face Detection model, area and the face proportion in colour of skin area of the colour of skin in the picture are detected, exclusion colour of skin area is less and face accounts for the great image in threshold value of ratio of skin tone；If face accounts for colour of skin specific gravity less than threshold value, the convolutional neural networks completed using training are extracted characteristics of image and judge image attributes by support vector machine classifier classification.Recognition of face, Face Detection can not only efficiently be told sensitive image in conjunction with three kinds of technologies of deep learning, and meet the requirement that sensitive image is handled in real time by the present invention, reduce recognition time.

Description

A kind of nude picture detection method and system based on machine learning
Technical field
The present invention is that research object is built with deep learning technology with sensitive image in internet (refering in particular to pornographic image) Vertical convolutional neural networks structure, by transfer learning, to the image zooming-out after recognition of face and two layers of Face Detection screening Semantic feature constructs semantic feature database, finally establishes support vector machine classifier, judge image attributes, establish one kind Nude picture detection method and system based on machine learning.
Background technique
Under conditions of Internet technology rapid development, when today's society has stepped into the big data based on multimedia messages Generation.The characteristics of image can more directly show things compared to other multimedias, and it is abundant in content there is no a language wide gap, therefore sea The digital picture of amount generates on the internet, and as Baidu includes the different picture of several hundred million Zhang Laiyuan, and quantity is being continuously increased In, the search engine Google and social network sites microblogging, Twitter, Facebook etc. of same type equally possess a large amount of figure Piece.Due to the complexity of internet, cause network while bringing people's convenience, pornography is also propagated without restraint.In China, Although law clear stipulaties are forbidden to propagate the harmful informations such as obscene pornographic, still there are many underground websites to seek by pornography Sudden huge profits.Since network access content is not classified limitation, i.e., any content can be accessed by anyone on network, lead to pornography It causes greatly to injure to teen-age physical and mental health, therefore inhibits the propagation of internet pornography, strike illegal website, screen Pornography is covered as an important social concern.
For teen-age secure internet connection, some anti-yellow softwares come into being, it is therefore intended that identification sensitive image, and by this A little sensitive image shieldings.These anti-yellow softwares mainly use two kinds of technologies at present: one is based on domain names and text information Image recognition, this method mainly pass through shielding IP address and keyword achieve the purpose that shield respective image, cannot be automatic Judge whether image is sensitive image by identification, and many porn sites come from overseas server now, lead to domain name It is difficult to find.Second method is the image recognition filtering technique based on content, by image skin color segmentation and human body attitude Etc. geometrical characteristics judge whether image is sensitive image, obtain preferable effect.But such methods extraction is characterized in low layer Feature, not only descriptive power is limited, but also intrinsic dimensionality is high, computationally intensive, especially when description image and sensitive image very When similar, it is difficult correctly to distinguish sensitive image and non-sensitive image using existing two kinds of technologies.How to extract high-level semantic and Distinguishable features become a difficult point of nude picture detection.
With the fast development of machine learning, deep learning is come into being, and becomes branch most booming at present, and The most wide technology of application prospect in entire artificial intelligence field.Wherein most widely used model is volume in computer vision Product neural network (Convolutional Neural Network, CNN), CNN model are shared by local receptor field and weight Strategy, realize the mapped mode characterized under less model parameter by original image pixels to abstract semantics.Due to depth mind Through network model, the neocognitron system of people can be simulated, picture material is carried out from bottom to high-rise gradually abstract table It reaches, closer to the mankind to the semantic knowledge of image, and extracting feature not by way of study is that artificial design is extracted, therefore The characteristic performance of extraction is more preferable.
Summary of the invention
It is an object of the invention to overcome the prior art, a kind of nude picture detection based on machine learning is proposed Recognition of face, Face Detection are merged with the feature extraction based on deep learning, can not only efficiently be told by method and system Sensitive image, and meet the requirement that sensitive image is handled in real time, more reduce recognition time.
The present invention solves technical solution used by its technology drawback: a kind of nude picture detection based on machine learning Method, comprising:
S1, system initialization, setting face account for complexion model gravity thresholds.
S2, input picture
S3, recognition of face: face knowledge is carried out first with Haar algorithm and AdaBoost algorithm to the image of user's input Not, if a possibility that in image not including face, being excluded as sensitive image, it is not necessary to subsequent identification is carried out, to reduce identification Time improves recognition efficiency.
S31, Haar-Like wavelet character extract: describing image to the image zooming-out Haar-Like wavelet character of input Face information, the matrix character of image is calculated by formula (1), and characteristic value, the party are quickly sought using integrogram method Method need to only traverse an image can obtain image all areas pixel and, will when avoiding each calculating matrix characteristic value Pixel and operation, to accelerate whole calculating speed.
fI=∑I ∈ I=1 ..., N)wi·RecSum(ri) (1)
F in formulaIIt is the characteristic value of i-th matrix, wiIt is the weight of i-th of matrix character, riIt is i-th of matrix character, RecSum(ri) be i-th of matrix character pixel and.
S32, AdaBoost algorithm are combined optimization to face characteristic: the small baud extracted using Haar-Like algorithm Training Weak Classifier is levied, the relatively minimal Weak Classifier of classification error rate is obtained by formula (2), and training step is repeated several times Suddenly, it is continuously added new Weak Classifier, until reaching scheduled error rate, then to each training by way of Nearest Neighbor with Weighted Voting Sample assigns a weight, so that Weak Classifier is combined into strong classifier.In order to accurately identify the image comprising face, Multiple strong classifiers are connected, by adjusting the threshold value of each strong classifier, allows the output of previous classifiers to be used as and classifies below The input of device, multilayer screening, to obtain the higher recognition of face classifier of accuracy rate.
ε in formulajPresentation class error rate, xiIt is i-th of training sample, yiIt is the label of i-th of training sample, wherein yi ∈ { 0,1 }, respectively indicates face and non-face, and n is training sample sum, hjIndicate Haar-Like feature fiTraining obtains weak Classifier, wt(i) the error weight of i-th of training sample in the t times iteration is indicated.
S4, Face Detection: often there are the parts of a large amount of Naked skins in sensitive image, therefore for including face Image carries out Face Detection under the color space YCbCr, image complexion model is calculated using formula (3), according to non-face area Colour of skin area is greater than twice of area of face's colour of skin of prior probability, gravity thresholds of the face in image area of skin color is arranged, such as The colour of skin is free of in fruit image or accounts for the overwhelming majority of the colour of skin containing the less colour of skin and face, i.e. face complexion proportion is big In threshold value, then judge the image for non-sensitive image immediately.
In formula, the partial pixel of ' 1 ' expression image belongs to the colour of skin, and ' 0 ' then indicates that the pixel is not belonging to the colour of skin.
S5, the nude picture detection based on machine learning
S51, training stage: the different types of image largely marked is chosen as training dataset, then builds depth Learning model, using convolutional neural networks model VGG16, it has 13 convolutional layers, 3 full articulamentums.For each calculating Unit need to only consider the input near its location of pixels, not need to connect with upper one layer of all nodes, meet the mankind to image Understanding, and to a picture carry out convolution when, convolution kernel slips over each pixel of picture one by one, that is, handles each pixel Parameter it is identical.Image often passes through a convolution kernel, is all the process of the feature extraction to image zooming-out.Pond layer utilizes maximum The method of value or average value makes the image characteristics extraction extracted have translation invariant shape, and convolutional layer and pond layer group are combined into convolution Very strong priori is added in neural network, that is, emphasizes the continuity and correlation of image local, while keeping feature invariant shape. Due to the increase of the model number of plies, parameter is caused to increase the drawbacks of increasing with complexity, using the parameter initialization of initialization VGG16 For it on ImageNet trained numerical value, the feature and training set image of extraction are compared by support vector machine classifier Label establishes loss function, then carries out transfer learning to small parameter perturbations using formula (4) and formula (5) backpropagation.It is logical Convolutional neural networks after crossing transfer learning extract characteristics of image, establish training set characteristics of image library.
wl→wl-α∑xδX, l(aX, l-1)T (4)
bl→bl-α∑xδX, l (5)
W in formulalIndicate weight, blIndicate biasing, δX, lIndicate the mistake that the sample x of input is generated in l layers of neuron (error i.e. between actual value and predicted value), aX, l-1Indicate output of the sample x of input at l-1 layers, α indicates learning rate, T Indicate transposition.
S52, test phase: by the image of recognition of face and Face Detection, pass through trained convolutional Neural net Network VGG16 extracts feature, and image in query image and characteristics of image library is then carried out measuring similarity, passes through support vector machines Classifier judges image attributes.
A kind of nude picture detection system based on machine learning, comprising:
Input system, for initializing system, given threshold, and input picture.
First compares judgement system, the input that the output of the input system compares judgement system as first；This first Compare judgement system for carrying out recognition of face to input picture, according to whether judging whether to continue to execute comprising face.
Second compares judgement system, and the described first output for comparing judgement system compares the defeated of judgement system as second Enter；This second compares judgement system and is used to carry out Face Detection to the image comprising face, according to complexion model in image and Specific gravity of the face in complexion model, judges whether to continue to execute.
Deep learning system, described second compares input of the output of judgement system as deep learning system；The depth Learning system is used to extract the feature of image, and judges image attributes by classifier, exports image attributes result；The depth Learning system is divided into training stage and test test, before input picture enters deep learning system, the deep learning system Training stage needs to complete, and convolutional neural networks VGG16 parameter is completed to adjust by the training stage；When input picture reaches depth When learning system, the process of feature extraction is directly completed by adjusting good convolutional neural networks, and complete by support vector machines Classification is to judge image attributes.
A kind of nude picture detection method and system based on machine learning of the present invention, advantage and effect are:
The present invention improves existing nude picture detection mode, in conjunction with recognition of face, Face Detection and deep learning, mentions A kind of nude picture detection method and system based on deep learning out.The present invention carries out recognition of face to image, and exclusion is not wrapped Image containing face information；Using Face Detection model, colour of skin area in the picture and face are detected in colour of skin area Proportion, exclusion colour of skin area is less and face accounts for the great image in threshold value of ratio of skin tone；If face accounts for the colour of skin, specific gravity is small In threshold value, characteristics of image is extracted using the convolutional neural networks that training is completed and by support vector machine classifier classification judgement figure As attribute.Recognition of face, Face Detection in conjunction with three kinds of technologies of deep learning, can not only efficiently be told sensitivity by the present invention Image, and meet the requirement that sensitive image is handled in real time, reduce recognition time.
Detailed description of the invention
The main flow chart of Fig. 1 nude picture detection.
Fig. 2 face recognition process flow chart.
Fig. 3 strong classifier series connection block diagram.
Fig. 4 Face Detection process flow diagram flow chart.
The image recognition process of Fig. 5 a, b based on machine learning.
Nude picture detection system diagram of the Fig. 6 based on machine learning.
Specific embodiment
Shown in Figure 1, the present invention is a kind of nude picture detection method based on machine learning, comprising:
Every threshold value is arranged by known priori knowledge, comprising: the colour of skin of normal picture accounts in S1, first system initialization Human body proportion and face account for colour of skin specific gravity；Priori knowledge refers in particular to the historical data that this industry has already passed through verifying.
The image for needing to judge is inputted, can be handled in real time by S2, input picture.
S3, recognition of face is carried out to the image of input, the step is shown in Figure 2, and selection, which has to be exceedingly fast, detects speed Haar-Like small echo Face datection algorithm.Firstly, extracting the Haar-Like wavelet character of image, calculated with integrogram method Then the characteristic value of Haar-Like feature is combined and is optimized to obtained face characteristic using AdaBoost algorithm, by A kind of the smallest Weak Classifier composition strong classifier of the error in classification rate arrived, then multistage strong classifier series connection is examined to improve face The precision of survey.
The face information that image is described to the image zooming-out Haar-Like wavelet character of input is calculated using formula (6) The matrix character of image.
fI=∑I ∈ I={ 1 ..., N }wi·RecSum(ri) (6)
F in formulaIIt is the characteristic value of i-th matrix, wiIt is the weight of i-th of matrix character, riIt is i-th of matrix character, RecSum(ri) be i-th of matrix character pixel and.
Characteristic value, this method progressive scanning picture, using formula (7) recursive calculation are quickly sought using integrogram method When, image, which arrives each point from the off and is formed by the sum of rectangular area pixel as the element of an array, is stored in memory In, when the pixel and Shi Ke that calculate some region are with the element of direct index array, only need to traverse an image can be obtained The pixel of image all areas and, when avoiding each calculating matrix characteristic value will pixel and operation, to accelerate whole The calculating speed of body.
(i, j) indicates any point in image in formula, s (i, j) indicate the cumulative of the line direction and, initialization s (i ,- 1) integral image is indicated for 0, n (i, j), initialization n (- 1, j) is 0.
AdaBoost algorithm is combined optimization to face characteristic: being instructed using the wavelet character that Haar-Like algorithm extracts Practice Weak Classifier, the relatively minimal Weak Classifier of classification error rate is obtained by formula (8).
ε in formulajPresentation class error rate, xiIt is i-th of training sample, yiIt is the label of i-th of training sample, wherein yi ∈ { 0,1 }, respectively indicates face and non-face, and n is training sample sum, hjIndicate Haar-Like feature fiTraining obtains weak Classifier, wt(i) the error weight of i-th of training sample in the t times iteration is indicated.
Then a weight is assigned to each training sample by the way of formula (9) Nearest Neighbor with Weighted Voting, updates all samples Weighting parameter:
In formula,Indicate the parameters weighting of t-th of learner, εtPresentation class error rate, σiIt indicates to divide when=0 Class is correct, right value update, σiPresentation class mistake when=1, weight are constant.
The training step is repeated several times, is continuously added new Weak Classifier, it is scheduled until reaching after n times iteration Then Weak Classifier is combined into strong classifier by error rate.
In order to accurately identify the image comprising face, multiple strong classifiers are connected, it is shown in Figure 3, pass through tune The threshold value for saving each strong classifier, allows input of the output as classifier below of previous classifiers, and multilayer is screened, to obtain The higher recognition of face classifier of accuracy rate.
S4, Face Detection: it is shown in Figure 4, Face Detection is executed to the image comprising face information.
Often there are the parts of a large amount of Naked skins in sensitive image, therefore for the image comprising face in YCbCr (Y representative image luminance component, Cb represent blue luminences component, and Cr represents red luma component) carries out colour of skin inspection under color space It surveys, calculates image complexion model using formula (10) by known priori knowledge.
In formula, the partial pixel of ' 1 ' expression image belongs to the colour of skin, and ' 0 ' then indicates that the pixel is not belonging to the colour of skin.
It is greater than twice of area of face's colour of skin of prior probability according to the non-face area colour of skin area of human body face, setting face exists Gravity thresholds in image area of skin color, if without the colour of skin or accounting for the exhausted of the colour of skin containing the less colour of skin and face in image Most of, i.e., face complexion proportion is greater than threshold value, then judges the image for non-sensitive image immediately.
The step of S5, nude picture detection based on machine learning, is referring to shown in Fig. 5 a, b, including two stages: training rank Section and test phase.
S51, training stage: the different types of image largely marked is chosen as training dataset, then builds depth Learning model, using convolutional neural networks model VGG16, it has 13 convolutional layers, 3 full articulamentums.
Convolutional layer is mainly there are three feature: local sensing, weight be shared, multi-kernel convolution.For each computing unit, only It need to consider the input near its location of pixels, not need to connect with upper one layer of all nodes, meet understanding of the mankind to image, And when carrying out convolution to a picture, convolution kernel slips over each pixel of picture one by one, that is, handles the parameter of each pixel It is identical.Image often passes through a convolution kernel, is all the process of the feature extraction to image zooming-out.
Pond layer makes the image characteristics extraction extracted have translation invariant shape, volume using maximum value or the method for average value Lamination and pond layer group are combined into convolutional neural networks and very strong priori are added, that is, emphasize the continuity of image local to it is related Property, while keeping feature invariant shape.
In order to realize linear separability, the vector of a feature space is mapped to another space by nonlinear transformation In, it must be added to activation primitive in convolutional neural networks, the activation primitive using formula (11) ReLU function as this frame.
F (x)=max (0, x) (11)
Its derivative is formula (12):
When x value is negative, node is closed；When x is greater than 0, functional derivative is always 1, it is entirely avoided gradient disappears The problem of mistake, guarantees that parameter can continue to restrain.
Due to the increase of the model number of plies, parameter is caused to increase the drawbacks of increasing with complexity, using the ginseng of initialization VGG16 Number is initialized as its trained numerical value on ImageNet, and the feature and training of extraction are compared by support vector machine classifier The label for collecting image, establishes loss function, is then moved using formula (13) and formula (14) backpropagation to small parameter perturbations Move study.
wl→wl-α∑xδX, l(aX, l-1)T (13)
bl→bl-α∑xδX, l (14)
W in formulalIndicate weight, blIndicate biasing, δX, lIndicate the mistake that the sample x of input is generated in l layers of neuron (error i.e. between actual value and predicted value), aX, l-1Indicate output of the sample x of input at l-1 layers, α indicates learning rate, T For transposition.
Characteristics of image is extracted by the convolutional neural networks after transfer learning, establishes training set characteristics of image library, preservation is moved Move the parameter of convolutional neural networks model after learning.
S52, test phase: to the image Jing Guo recognition of face and Face Detection, pass through trained convolutional Neural Network extracts feature, and image in query image and characteristics of image library is then carried out measuring similarity, passes through support vector machines point Class device judges image attributes.
A kind of nude picture detection system based on deep learning, it is shown in Figure 6, comprising:
Input system, for initializing system, given threshold, and input picture.
First compares judgement system, the input that the output of the input system compares judgement system as first；This first Compare judgement system for carrying out recognition of face to input picture, according to whether judging whether to continue to execute comprising face.
Second compares judgement system, and the described first output for comparing judgement system compares the defeated of judgement system as second Enter；This second compares judgement system and is used to carry out Face Detection to the image comprising face, according to complexion model in image and Specific gravity of the face in complexion model, judges whether to continue to execute.
Deep learning system, described second compares input of the output of judgement system as deep learning system；The depth Learning system is used to extract the feature of image, and judges image attributes by classifier, exports image attributes result；The depth Learning system is divided into training stage and test test, before input picture enters deep learning system, the deep learning system Training stage needs to complete, and convolutional neural networks VGG16 parameter is completed to adjust by the training stage；When input picture reaches depth When learning system, the process of feature extraction is directly completed by adjusting good convolutional neural networks, and complete by support vector machines Classification is to judge image attributes.
Above-mentioned implementation be only used to further illustrate a kind of nude picture detection method based on deep learning of the invention with System, but the present invention does not limit to and embodiment, any letter to the above embodiments according to the technical essence of the invention Single modification, equivalent variations and modification, each fall within the protection scope of technical solution of the present invention.

Claims (4)

1. a kind of nude picture detection method based on machine learning, it is characterised in that: the method steps are as follows:
S1, system initialization, setting face account for complexion model gravity thresholds；
S2, input picture；
S3, recognition of face: carrying out recognition of face first with Haar algorithm and AdaBoost algorithm to the image of user's input, if A possibility that not including face in image, being excluded as sensitive image, it is not necessary to subsequent identification is carried out, so that recognition time is reduced, Improve recognition efficiency；
S4, Face Detection: carrying out Face Detection for the image comprising face under the color space YCbCr, is counted using formula (3) Nomogram is greater than twice of area of face's colour of skin of prior probability according to non-face area colour of skin area as complexion model, and face is arranged Gravity thresholds in image area of skin color, if without the colour of skin or accounting for the colour of skin containing the less colour of skin and face in image The overwhelming majority, i.e. face complexion proportion are greater than threshold value, then judge the image for non-sensitive image immediately；
In formula, the partial pixel of ' 1 ' expression image belongs to the colour of skin, and ' 0 ' then indicates that the pixel is not belonging to the colour of skin；
S5, the nude picture detection based on machine learning.
2. a kind of nude picture detection method based on machine learning according to claim 1, it is characterised in that: the step Rapid S3 recognition of face, specific as follows:
S31, Haar-Like wavelet character extract: the people of image is described to the image zooming-out Haar-Like wavelet character of input Face information is calculated the matrix character of image by formula (1), and quickly seeks characteristic value using integrogram method:
fI=∑I ∈ I={ 1 ..., N }wi·RecSum(ri) (1)
F in formulaIIt is the characteristic value of i-th matrix, wiIt is the weight of i-th of matrix character, riIt is i-th of matrix character, RecSum (ri) be i-th of matrix character pixel and；
S32, AdaBoost algorithm are combined optimization to face characteristic: being instructed using the wavelet character that Haar-Like algorithm extracts Practice Weak Classifier, the relatively minimal Weak Classifier of classification error rate obtained by formula (2), and the training step is repeated several times, It is continuously added new Weak Classifier, until reaching scheduled error rate, then to each trained sample by way of Nearest Neighbor with Weighted Voting One weight of this imparting, so that Weak Classifier is combined into strong classifier:
ε in formulajPresentation class error rate, xiIt is i-th of training sample, yiIt is the label of i-th of training sample, wherein yi∈ 0, 1 }, face and non-face is respectively indicated, n is training sample sum, hjIndicate Haar-Like feature fiThe weak typing that training obtains Device, wt(i) the error weight of i-th of training sample in the t times iteration is indicated.
3. a kind of nude picture detection method based on machine learning according to claim 1, it is characterised in that: the step Rapid nude picture detection of the S5 based on machine learning, specific as follows:
S51, training stage: the different types of image largely marked is chosen as training dataset, then builds deep learning Model, using convolutional neural networks model VGG16, it has 13 convolutional layers, 3 full articulamentums；For each computing unit, It need to only consider the input near its location of pixels, not need to connect with upper one layer of all nodes, and a picture is carried out When convolution, convolution kernel slips over each pixel of picture one by one, that is, the parameter for handling each pixel is identical；Image often passes through one Convolution kernel is all the process of the feature extraction to image zooming-out；Pond layer makes extraction using maximum value or the method for average value Image characteristics extraction has translation invariant shape, and convolutional layer and pond layer group are combined into convolutional neural networks and very strong priori warp are added It tests, that is, emphasizes the continuity and correlation of image local, while keeping feature invariant shape；Due to the increase of the model number of plies, cause Parameter increases the drawbacks of with complexity increase, and the parameter initialization of initialization VGG16 is used to train on ImageNet for it Numerical value, the feature of extraction and the label of training set image are compared by support vector machine classifier, establishes loss function, then Using formula (4) and formula (5) backpropagation to small parameter perturbations, transfer learning is carried out；Pass through the convolutional Neural after transfer learning Network extracts characteristics of image, establishes training set characteristics of image library:
wl→wl-α∑xδX, l(aX, l-1)T (4)
bl→bl-α∑xδX, l (5)
W in formulalIndicate weight, blIndicate biasing, δX, lThe mistake for indicating that the sample x of input is generated in l layers of neuron is (i.e. real Error between actual value and predicted value), aX, l-1Indicate output of the sample x of input at l-1 layers, α indicates that learning rate, T indicate Transposition；
S52, test phase: by the image of recognition of face and Face Detection, pass through trained convolutional neural networks VGG16 extracts feature, and image in query image and characteristics of image library is then carried out measuring similarity, passes through support vector machines point Class device judges image attributes.
4. a kind of nude picture detection system based on machine learning, it is characterised in that: the nude picture detection system includes:
Input system, for initializing system, given threshold, and input picture；
First compares judgement system, the input that the output of above-mentioned input system compares judgement system as first；This first compares Judgement system is used to carry out recognition of face to input picture, according to whether judging whether to continue to execute comprising face；
Second compares judgement system, the input that the described first output for comparing judgement system compares judgement system as second；It should Second, which compares judgement system, is used to carry out Face Detection to the image comprising face, is existed according to complexion model in image and face Specific gravity in complexion model judges whether to continue to execute；
Deep learning system, described second compares input of the output of judgement system as deep learning system；The deep learning System is used to extract the feature of image, and judges image attributes by classifier, exports image attributes result；The deep learning system System is divided into training stage and test test, before input picture enters deep learning system, the training of the deep learning system Stage needs to complete, and convolutional neural networks VGG16 parameter is completed to adjust by the training stage；When input picture reaches deep learning system When system, the process of feature extraction is directly completed by adjusting good convolutional neural networks, and complete to classify by support vector machines To judge image attributes.
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