55results about How to "Classification results are reliable" patented technology

The invention provides a diabetic retinopathy grade classification method based on deep learning. The diabetic retinopathy grade classification method comprises the steps of: constructing a sample library; removing backgrounds and noise of ophthalmoscope photographs in the sample library; normalizing the images of different brightness and different intensity to the same range by adopting a local mean value subtracting method; adopting random stretching and rotating methods for different samples for data augmentation, and constructing a training set and a test set; training an initial deep learning network model by establishing an input portion architecture, a multi-branch feature transformation portion architecture and an output portion architecture separately; and inputting samples to betested into the trained initial deep learning network model for diabetic retinopathy grade classification. Compared with the traditional processing method, the diabetic retinopathy grade classification method gets rid of the dependence on prior knowledge, and has good generalization ability; and by adopting the designed multiple grades, a small-sized convolution kernel can be used for extracting very tiny lesion features, thereby making the classification results more reliable.

The invention relates to an intelligent biological signal anomaly detection method and a system capable of carrying out efficient, accurate and low-cost automatic analysis on biological signals. The system comprises a model training stage and a model application stage, wherein the model training stage comprises the following steps: acquiring a biological signal; preprocessing the acquired signal;sending the preprocessed data to a CNN-BilSTM-Attention combination model to extract features, wherein the signal firstly enters a CNN convolution neural network to extract the spatial features, thenenters a two-way long-short time memory network to extract time features, then passes through each network connection layer and finally passes through a SoftMax layer to calculate the final result, each link of the network is established, and the emphasis degree of different sequence points of signals are optimized by setting an Attention mechanism; calculating loss of the network module until themodule loss is less than the threshold, then the model training is completed, and otherwise Adam is used to optimize model parameters. The invention effectively improves the analysis effect of biomedical signals.

The invention discloses an unmanned aerial vehicle airborne platform-based vehicle type identification method and belongs to the technical field of video images. The method comprises the following steps of S1: adjusting the height of an unmanned aerial vehicle above the ground to a position suitable for vehicle type identification; S2: acquiring infrared image positive and negative samples used for vehicle target detection offline, performing characteristic extraction by utilizing a convolutional neural network (CNN), and performing support vector machine (SVM) training to obtain an SVM classifier model used for online vehicle type identification; S3: performing infrared photography by utilizing an infrared video camera to obtain a video image signal; and S4: performing sliding window sampling on a shot infrared image sequence, extracting vehicle type characteristics by utilizing the CNN, and inputting the characteristics in the classifier model obtained in the step S2 to perform classification. According to the method, the vehicle type identification can be finished in the day, at night and under the condition of severe weather condition and relatively low visibility by adopting the infrared video camera; and meanwhile, the method can be used for dynamically selecting a detection region, so that the flexibility of a detection system is improved.

The invention provides a method and a system for automatically classifying objects. The method comprises the following steps: inputting a group of the objects and a class hierarchy for classifying theobjects; acquiring body information correlative with a field; using a method based on the body information to classify each object into the class hierarchy so as to obtain a first classification result; using a method based on information retrieval (IR) to classify each object into the class hierarchy so as to obtain a second classification result; and combining the first and the second classification results to obtain a final classification result. The method and the system can be applied to single-layer or multi-layer class hierarchies, and can effectively and accurately achieve object classification so as to obtain a smaller classification result granularity.

The invention provides a target feature-assisted multi-source data correlation method, aiming to provide a correlation method with high utilization rate of measurement parameters and capable of improving the correlation accuracy of a radar and electronic support measures (ESM). The target feature-assisted multi-source data correlation method is realized through the following technical scheme thataccording to the correlation between heterogeneous features, a correlation classification rule of heterogeneous sensor data is determined, a mapping correlation model of a target motion feature space,a target recognition feature space and a target type space is established, a category identification frame is established, K neighbors being at a distance from target features are found according toa K-K-nearest neighbor-NN rule, and trust assignment is constructed based on the distance between a target and the neighbors of the target, an acceptance threshold value and a rejection threshold value; the features of the target at each sampling time are obtained, and then BK-NN training is carried out on the target features at each t time, local static evidences at corresponding times of the categories are obtained and are integrated to generate a static criterion; and the comprehensive results of dynamic classification of different features are calculated, and the correlation filtering results are obtained.

The invention discloses a news theme classification method which is characterized by including the following steps: (1) building a seed dictionary according to news theme classes, conducting word segmentation on news themes to extract title keywords, conducting meta searching on the title keywords through a plurality of search engine servers based on the internet, conducting frequency statistics on seed keywords in meta searching results, and judging the final news theme classes according to the occurring frequency of the seed keywords in the meta searching results. According to the news theme classification method, the classification time can be greatly shortened, the labor cost is effectively reduced, dependency on historical data is avoided, the use time of the whole classification process is short, the classification result is reliable, multiple kinds of classifications can be carried out on news, and the news theme classification method is high in universality in actual situations.

The invention relates to an intelligent LED (light emitting diode) display screen classifying system and method. The system comprises a database, an analysis algorithm module and a classifying module, wherein the database is used for storing LED display screen relevant data including operating state parameters of LED display screen and user operation data; the analysis algorithm module is provided with a plurality of algorithm sub-modules which are respectively used for analyzing, creating sorting of the corresponding data acquired from the database and for screening a sorting result through a threshold value so as to generate LED display screen classifying result data to be outputted; the classifying module is provided with a plurality of categories, each category corresponds to the corresponding algorithm sub-module in a plurality of algorithm sub-modules in the analysis algorithm module, and the classifying module is used for responding to the selection operation for a plurality of categories and transmitting the corresponding classifying request to the analysis algorithm module so as to trigger the corresponding algorithm sub-module in a plurality of algorithm sub-modules. The categories are defined as collections with evidence and real significance, the LED display screens are classified according to objective data, and the classifying result is realistic and credible.

The invention discloses a reservoir classification evaluation method based on secondary parameter selection. The reservoir classification evaluation method comprises the steps of introduction and classification of reservoir evaluation parameters, correlation analysis of the reservoir evaluation parameters, primary selection of the reservoir evaluation parameters, secondary selection of the reservoir evaluation parameters and determination of reservoir classification evaluation standards through K-means clustering. Beneficial effects of the present invention are: reservoir evaluation parametersare determined through secondary optimization; reservoir evaluation is completed through K-means clustering; compared with the prior art, the reservoir classification evaluation method has the advantages that parameter selection is more accurate and reliable, the reservoir classification result is more credible, reservoir evaluation parameters can be quantitatively optimized through secondary selection of the reservoir parameters, the standard is accurate and unified, and the reservoir evaluation method combines macroscopic and microscopic parameters, so that the finally obtained evaluation standard is more comprehensive and accurate.

The invention provides a passive terahertz security check method and system and a medium, and the method comprises the steps: judging whether a collected terahertz image is a first strip-shaped background image or not, and obtaining a global mean line vector of the image; removing stripe interference information in the original image; performing gray histogram extraction; distinguishing the difference between the background and the foreground by adopting an image segmentation algorithm, and extracting a segmentation threshold; performing secondary threshold segmentation processing according tothe segmentation threshold, and removing background interference; performing histogram equalization operation on the pixels; performing morphological processing; performing weighting processing on the image to obtain a final image; and establishing a YOLOV3 framework based on deep learning, configuring an operation environment, taking a final image as input for detection, and outputting a final type of suspicious dangerous goods carried by a human body. The deep learning detection has a higher recognition rate and a more reliable classification result, and successfully solves the problem thathidden suspicious dangerous goods are difficult to accurately recognize in a terahertz image.

The invention discloses a network security blog classification method and a network security blog classification system based on feature extraction. The method comprise calculating the non-dictionaryword density for each blog; calculating blog malicious tendencies for each blog; counting high-frequency words common to all blogs; calculating the frequency of each high-frequency word in each blog Inverse document frequency; based on the blog's non-dictionary word density, blog malicious tendencies, and the frequency of each high-frequency word in each blog-Inverse document frequency, and codingbased on the correlation or uncorrelation between blog and IOC to train the preset classification model to obtain a blog classifier; gettomg the non-dictionary word density of the blog to be categorized, blog malice, and the frequency of high-frequency words Reverse the document frequency and input to the trained blog classifier to obtain the classifier output value indicating that the blog to beclassified is related or not related to the IOC. Through the above method, IOC-related blogs and IOC-independent blogs in network security technology blogs can be accurately classified.

The present invention discloses a polarization SAR image classification method based on non-stationary modeling of a polarization scattering mechanism, in order to solve the problems that the existingpolarization SAR image classification is affected by noise and has low accuracy for the mixed pixels with no obvious main scattering mechanism. The implementation steps are: initially classifying measured images; estimating the auxiliary random field according to the polarization scattering characteristics, and associating the polarization scattering characteristics with the non-stationarity; dividing the pixel point stationarity by using the auxiliary random field; calculating correlation functions for the stationary pixel points to obtain a unitary potential energy function, a data item, and a binary potential energy function; calculating the membership degree for non-stationary pixel points; constructing a posterior probability model of a fuzzy triple-recognition random field (FTDF) model by using the obtained functions, and performing classification by using the maximum posterior probability criterion; and if it is marked that the random field converges, outputting a result, and otherwise repeatedly constructing the classification model according the iterative rule until the termination iteration requirement is reached, and outputting a classification result. The method disclosed by the present invention has high detection precision and good anti-noise performance, and can be used for polarization SAR image classification.

The invention discloses a ship trajectory classification method based on feature selection and hyper-parameter optimization. For the problem of unbalanced original data in ship trajectory classification, firstly, data cleaning and preprocessing are performed on multiple pieces of trajectory data of an automatic ship identification system, then all trajectories are drawn by matplotlib, unavailable trajectories are deleted, then features are calculated to obtain additional features, dimensionality reduction processing is performed on speed, course and trajectory coordinates, backward feature selection is carried out on all features after dimension reduction processing through a random forest (RF), finally hyper-parameter optimization is carried out through the random forest, and classification prediction is carried out on the features through model training and performance evaluation without depending on an external information source. The ship trajectory classification method has high performance and is stable, and can be effectively applied to actual ship trajectory classification.

The invention provides an out-of-distribution image detection method based on attention enhancement and input disturbance, the method adopts an input disturbance technique, the influence on samples in distribution is greater than that of samples out of distribution, so that the confidence score of the samples in distribution is higher, and meanwhile, a temperature scaling technique is used, the prediction probability distribution of the samples in the distribution is more sharp, the prediction probability of the samples out of the distribution is smoother, and the confidence score difference between the samples inside and outside the distribution is further increased; compared with the mode that a generative model is directly used for carrying out a distributed external sample detection task, the method has the advantages that the method does not need to introduce additional hyper-parameters, the model is relatively simple, and the training time can be saved; compared with a generative adversarial method for performing an out-of-distribution sample detection task, the method has the advantages that the method is not excessively limited to training data, misjudgment is not easy to generate for edge samples, and a better detection effect can be obtained.

The invention provides a squid identifying and sorting method which comprises the following steps of firstly, extracting a squid area from an image containing squids, then judging the orientation andintegrity of the squids through the area characteristics, extracting the necks of the complete squids through a morphological algorithm, calculating the body length, and dividing the squids into a plurality of grades according to the body length; for the incomplete squids, marking the squids directly as the lowest level; and according to the grading condition, controlling the external selection equipment to distribute the squids, thereby finishing classification. According to the method, the squids can be automatically identified and graded, the grabbing and distribution are controlled, the manual operation is not needed during the whole process, the intelligent degree is high, the manpower is greatly saved, the identification accuracy is high, and the classification result is reliable. The method can accurately and effectively sort the different types of squids and the aquatic products, such as cuttlefishes, octopuses, etc., which have the similar shapes with the squids.

The embodiment of the invention provides an image processing method and device, equipment and a medium, and the method comprises the steps: carrying out feature extraction of a to-be-processed image,and obtaining a feature map of the to-be-processed image; determining an attribute prediction value of each feature point on the feature map, wherein the attribute prediction value of one feature point represents the probability that a pixel point corresponding to the feature point in the to-be-processed image belongs to a text region, the prediction distance between the pixel point and a plurality of position points of the text region to which the pixel point belongs, and the prediction category of the text region to which the pixel point belongs; and according to the attribute prediction value of each feature point on the feature map, marking the position and category of each text region on the to-be-processed image. By adopting the technical scheme of the invention, the accuracy of positioning and classifying the text area in the image can be improved.

The invention provides a method for improving accuracy of classification and extraction of target ground objects in a remote sensing image. The method weighs the extraction accuracy and the extraction ratio of the target ground objects, and a decision-making trade-off interval is obtained through setting thresholds of the extraction accuracy and the extraction ratio of the target ground objects, so that the accuracy of classification and extraction of the target ground objects in the existing remote sensing image is greatly improved.

The invention discloses a building wind field ground roughness identification method based on a multi-scale input neural network, and the method comprises the following steps: S1, dividing at least two scales according to the size of the surrounding range of a building, and collecting a satellite image; s2, using an ESDU method to calibrate the ground roughness of the image; s3, constructing a multi-scale input convolutional neural network model, and respectively training the input sector diagram of each scale by adopting mutually independent convolutional neural networks until a SoftMax layer outputs a result; s4, fusing training output results of the fan-shaped diagrams with various scales on a SoftMax layer, and calculating a Loss function; s5, comparing Loss function value convergence errors to obtain a classification model; and S6, inputting the to-be-detected image into the classification model for identification and classification to obtain a classification result. The method is used for improving the accuracy and efficiency of building wind field test simulation.