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36results about How to "Increase information entropy" patented technology

Face image fusing method based on laplacian-pyramid

The invention relates to a human face image fusing method based on laplacian-pyramid. On a basis of the laplacian-pyramid decomposition, the invention applies a partial binary mode arithmetic operator into a fusion rule. As for infrared and visible-light human face images in each layer of the laplacian-pyramid, average gradient of the image, standard deviation of an image histogram and Chi square statistic similarity measurement are used for determining the selection of respective weighting coefficients of the infrared and visible-light human face images, and effective fusion is performed by utilizing the determined weighting coefficients so as to obtain a fused image which is rich in detail information, clear and stable and facilitates the observation of human eyes. Compared with visible-light images and near-infrared images, the fused information provided by the invention has greater comentropy but smaller average cross-entropy and mean square root cross-entropy and has more remarkable effect of image fusion.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY +1

Long-wave infrared polarization feature extraction and fusion image enhancement method

The invention belongs to the field of infrared image processing, and relates to an image enhancement method based on long-wave infrared polarization feature extraction and fusion method. The method comprises the steps of (S1) collecting an infrared polarization image, and preprocessing the collected infrared polarization image; (S2) performing Stokes polarization state calculation on the preprocessed image in the step (S1), and calculating a polarization degree and a polarization angle according to a Stokes polarization state calculation result; (S3) carrying out completely polarized light decomposition calculation by using the polarization degree and the polarization angle; (S4) defining a polarization orthogonal difference value, setting a weighting coefficient, and extracting a polarization feature image, wherein the polarization feature image comprises a polarization parallel component image and a polarization vertical component image; and (S5) fusing the polarization feature imageand an infrared intensity image by using a non-downsampling shear wave algorithm. The method can effectively extract the polarization information of a target scene, has a good polarization feature extraction effect, performs fusion on the extracted polarization feature image and the infrared intensity image and significantly enhances the information content of the target scene.
Owner:NAT UNIV OF DEFENSE TECH

Text feature extracting method based on inter-class distinctness and intra-class high representation degree

The invention discloses a text feature extracting method based on inter-class distinctness and intra-class high representation degree. The method comprises the following steps: preprocessing a training set text; calculating the class distinctness of each feature word through an improved feature selecting method so as to select feature words with more class representation, wherein the selected feature words are of high distinctness among different classes; and further screening the selected feature words which are of high class distinctness based on the intra-class distribution rate and information gain (IG) of the feature words. With the adoption of the method, the feature selection is carried out twice to select the feature words which are of high intra-class information entropy and high intra-class distribution rate, and thus the classifying efficiency and accuracy can be improved; in addition, the calculation is simple, so that the text classifying speed and accuracy can be improved.
Owner:CHENGDU WANGAN TECH DEV

Device and method for classifying plates

InactiveCN102663340AEnhanced color contrast/differentiationHigh precisionImage enhancementOptical filtersWave bandMulti wavelength
The invention relates to a device and a method for classifying plate, belongs to the technical field of image processing and solves the problems that existing plate classification methods are low in precision and poor in interference resistance. The device for classifying plates comprises a light source system, an image acquisition system and a narrow band optical filter. The light source system is used for projecting multi-wavelength light beams for the plates to be detected, and the image acquisition system is used for acquiring the to-be-detected plate grey level images which are filtered by the narrow band optical filter and sending the grey level images to a computer. The method for classifying the plates includes the steps: acquiring the grey level images with different wave bands of the plates to be detected; determining the wave band with the best separability by utilizing standard plates of the known wood assortments, and classifying the plates to be detected by utilizing the wave band with the best separability; or performing pixel-level image fusion for the grey level images with different wave bands, and acquiring a composite image; and classifying the plates to be detected by utilizing the composite image. By the aid of the device and the method for classifying plates, plate classification precision and interference resistance are increased.
Owner:NORTHEAST FORESTRY UNIVERSITY

Method for dynamically calibrating image light intensity on basis of environmental factors

The invention discloses a method for dynamically calibrating image light intensity on the basis of environmental factors. The method includes the steps of reversing an image to distinctly display key areas; segmenting the image into NxN sub-blocks for processing; processing the sub-blocks via power transformation; processing the sub-blocks via grayscale mapping transformation; subjecting the sub-blocks to histogram processing; processing the sub-blocks via dynamic fuzzy histogram equalization; respectively processing the sub-blocks via masking and filtering by a hybrid space processing method; iterating every sub-blocks of the NxN sub-blocks by a Lucy_Richardson filter; respectively calculating to optimize the power transformation step and the dynamic fuzzy histogram equalization step of the sub-blocks by a fuzzy logic theory; and reversing the image again and outputting the final image, wherein the N is an integer nine, the maximum information entropy is judged as the optimum optimizing standard. By the aid of the method, information entropy of the image is effectively increased, and good light calibrating effect is obtained.
Owner:SUZHOU SOUKE INFORMATION TECH

Infrared remote sensing image super-resolution reconstruction method based on TGV regularization

The invention discloses an infrared remote sensing image super-resolution reconstruction method based on TGV regularization. The method comprises the steps that a remote sensing infrared image super-resolution reconstruction model based on TGV regularization is obtained; a Huber function is utilized to perform semi-quadratic regularization to split the remote sensing infrared image super-resolution reconstruction model based on TGV regularization, so that a split image super-resolution reconstruction model is obtained; and an alternate direction multiplier method is utilized to perform value solving on the split image super-resolution reconstruction model to generate a super-resolution reconstruction image. Through the method, a noise reduction function can be achieved, good detail maintaining capability is obtained, and a peak signal-to-noise ratio, a signal-to-noise ratio and evaluation index values of an average structure similarity, information entropy, etc. can be effectively increased.
Owner:SHENGDA ECONOMICS TRADE & MANAGEMENT COLLEGE OF ZZ +1

Image recognition method and system

The invention relates to an image recognition method and system. The image recognition method includes the following steps that: objects of which the area is within a preset range are tracked and photographed, so that image data can be obtained; the image data of the same object are sequenced based on image quality obtained through photographing; image data of which the image quality is within a preset ranking preset range are stored after each sequencing; and the stored image data are processed, so that the feature data of the photographed object can be extracted. With the image recognition method and system adopted, the efficiency of image recognition and the correctness of the recognition can be improved.
Owner:上海市公安局刑事侦查总队 +1

Self-adaptive exposure adjustment multi-scale entropy fusion underwater image enhancement method

The invention discloses a self-adaptive exposure adjustment multi-scale entropy fusion underwater image enhancement method, which comprises the steps of applying generalized bounded logarithm additionor subtraction operation to an original underwater image to derive derivative images with different exposures; calculating multi-scale Gaussian pyramid images with different exposure quantities and multi-scale Laplace pyramid images with different exposure quantities; calculating multi-scale Gaussian pyramid weight images with different exposures; obtaining a normalized multi-scale Gaussian pyramid weight iteration image with different exposure quantities; obtaining a multi-scale pyramid fusion image; obtaining a pyramid fusion image; and obtaining an enhanced image based on rich gradient information of the pyramid fusion image. According to the method, the underwater image is enhanced, so that the contrast and saturation of the enhanced image can be well considered, image details are richer and clearer, and the contrast, information entropy, color information and the like of the whole image can be further improved.
Owner:CHANGZHOU INST OF TECH

Ship target long wave infrared image enhancement method under water surface background

The invention belongs to the infrared image processing field and relates to a ship target long wave infrared image enhancement method under the water surface background. The method comprises steps that (S1), an infrared polarization image of the target scene is acquired and preprocessed; (S2), Stokes polarization state solution of the preprocessed image in the (S1) is carried out; (S3), a polarization degree image and a polarization angle image of the target scene are calculated according to the Stokes polarization state solution result; (S4), normalization processing of the polarization degree image and an infrared intensity image is carried out; (S5), inversion operation of the normalized polarization degree image is carried out; and (S6), product operation among pixels is carried out for the polarization degree image after inversion operation of the (S5) and the infrared intensity image after normalization processing of the (S4) is carried out to acquire a fused image. The method isadvantaged in that a problem of solar flare interference during ship target detection under the complex water surface background, a weak target enhancement problem and an infrared radiation energy attenuation problem during long-range detection are solved.
Owner:NAT UNIV OF DEFENSE TECH

An area energy photon counting image fusion algorithm based on an adaptive threshold value

The invention discloses an area energy photon counting image fusion algorithm based on an adaptive threshold value, and belongs to the technical field of image fusion. The method is characterized by comprising the following steps of step 1001, carrying out redundant wavelet transformation; step 1002, calculating regional energy, neighborhood mean square error, matching degree and self-adaptive threshold value; step 1003, calculating a weighting coefficient and an enhancement factor; step 1004, calculating a matching degree; step 1005, judging a matching degree and a self-adaptive threshold value; step 1006, when the matching degree is smaller than a self-adaptive threshold value, selecting an enhancement value of a pixel point of an area with high energy as a corresponding pixel point value in the fusion image; step 1007, if the matching degree is greater than or equal to a self-adaptive threshold value, adopting a weighted area energy method; and step 1008, obtaining a photon countingfusion image. Through the algorithm, the problems of unclear contour, serious noise, photon counting image information redundancy under extremely weak illumination, unclear details and the like of afusion image obtained through a regional energy fusion method are solved.
Owner:SHANDONG UNIV OF TECH

High-resolution satellite image super-resolution reconstruction method

A high-resolution satellite image super-resolution reconstruction method relates to the technical field of high-resolution image processing, solves the problems of image blurring, distortion, under-sampling, noise, etc. in existing image reconstruction methods, and, moreover, solves the problems that artificial processing errors exist and complementary information between multi-frame images cannotbe fully used in the existing image reconstruction methods. The high-resolution satellite image super-resolution reconstruction method comprises the following steps: inputting 8 frames of sequence low-resolution images, and building an initial reconstruction image for the first frame of the images; calculating a fuzzy matrix of other frames and a geometric deformation matrix of the other frames relative to the first frame using an active viewpoint image degradation analysis model, and determining a down-sampling matrix according to the magnification ratio of the initial reconstruction image relative to the first frame; designing a residual error calculation formula, a residual error constraint set and a point projection operator using an improved POCS super-resolution reconstruction method, and performing iterative correction on the initial reconstruction image. Image detail information is significantly improved, and the comprehensive quality of the image is greatly improved.
Owner:CHANGGUANG SATELLITE TECH CO LTD

Polarization image visualization method based on color image fusion

The invention discloses a polarization image visualization method based on color image fusion. The method comprises the following steps: firstly, converting a polarization image into a three-channel image of light intensity, polarization degree and polarization angle; secondly, decomposing the image into a polarized light color image and a natural light grayscale image; thirdly, performing image fusion on the two decomposed images, specifically, selecting a proper edge-preserving fusion algorithm according to requirements to fuse light intensity channels of the two images; then, normalizing the fused light intensity and polarization angle channels; and finally, projecting the normalized image to an HSV color space to obtain a final polarized color image with visualization. According to theinvention, highlighting of low-polarization-degree high-frequency detail features in an original image is used as a solution for improving image information amount and readability.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI

Leather material surface defect detection method based on feature modeling significance detection

The invention discloses a leather material surface defect detection method based on feature modeling saliency detection, and the method comprises the steps: S01, collecting the video information of a leather material, and selecting a plurality of frames of images from a video as to-be-detected images; s02, performing preliminary acquisition of a saliency image by adopting a bottom-up model to obtain a first saliency image; s03, enhancing the first saliency image by using an equal-area multi-histogram equalization algorithm to obtain a second saliency image; s04, processing the second saliency image based on super-pixel re-optimization to obtain a third saliency image; and S05, finally, marking the position of the defect according to the third saliency image, and carrying out adaptive thresholding on the obtained third saliency image by using a global threshold method.According to the method, the calculation amount of the algorithm is effectively reduced, and the detection speed is high and the detection result is more stable and accurate under the condition that the detected defects are different in size and are dispersed in a plurality of areas of the leather material.
Owner:NANJING INST OF TECH +1

Standard digital power source with controllable message discreteness and application method thereof

PendingCN111257821AGuaranteed Lost Randomness RequirementsIncrease information entropyElectrical measurementsPacket lossNumber generator
The invention discloses a standard digital power source with controllable message discreteness and an application method thereof. The standard digital power source comprises a main control FPGA moduleand an optical port Ethernet output module, wherein the main control FPGA module comprises a cycle counter used for generating a count value as seed output and a random number generator used for generating a random number according to a seed, and the optical port Ethernet output module is used for generating an IEC-61850 message to be outputted based on a packet loss control parameter formed by the random number; the application method comprises a random sequence generation method based on chaotic mapping and random packet loss control with controllable probability realized by controlling thepacket loss state of the output IEC-61850 message through the optical port Ethernet output module. The random sequence information entropy generated by the standard digital power source is large, theprobability is controllable, the message dispersion is reduced, the verified digital electric energy meter can be verified, the actual abnormal working condition can be well simulated, and the detection requirement of the abnormal communication state of the digital electric energy meter is met.
Owner:STATE GRID HUNAN ELECTRIC POWER +2

Underwater image enhancement method based on adaptive fractional order multi-scale entropy fusion

The invention discloses an underwater image enhancement method based on adaptive fractional order multi-scale entropy fusion. The underwater image enhancement method comprises the steps: dividing an original underwater image into non-overlapping image blocks; establishing an order reference matrix of the fractional order of the gradient domain; constructing a multi-scale fractional order referencematrix; obtaining a fractional order-based enhanced output image consistent with the scale number; calculating the information entropy and contrast of the fused image; determining an output image with enhanced contrast in the image block; obtaining a global contrast enhanced image; converting the original underwater image from the RGB image into a grayscale image; solving an adaptive gain function of the gradient image; obtaining a final adaptive gain underwater enhanced image based on fractional order multilayer entropy fusion; and outputting an adaptive gain underwater enhanced image basedon fractional order multilayer entropy fusion. The adaptive fractional order differential image enhancement method has a good effect on image enhancement of a texture region, and can adapt to changesof image gradient and brightness, so that the image enhancement effect is better.
Owner:CHANGZHOU INST OF TECH

Hyperchaos-based parallel encryption method for images in network office official document

The invention provides a hyperchaos-based parallel encryption method for images in network office official documents. Comprising the steps that 1, a chaotic password generator is composed of a secret key string, and the secret key string is composed of three sets of secret keys which are mutually iterated, wherein the three sets of secret keys are a 2D-Logistic secret key, an RANSAC-circle secret key and a superLorenz secret key; 2, receiving a network electronic official document image, and adopting a preprocessing-diffusion-scrambling-diffusion architecture mode in an encryption process to realize block parallel encryption; according to the method, the image key sensitivity is effectively improved, the calculation time of image encryption with large data is shortened, the key space is expanded, the calculation speed of the encryption process is improved, and hacker attacks such as statistical attacks and differential attacks are effectively resisted; according to the method, the problem of data inconsistency caused by calculation of different word lengths in network transmission is solved, the safety of cross transmission of sensitive document picture data in a public network is guaranteed, and the method can be applied to the field of information safety application such as network official documents and the like.
Owner:HARBIN UNIV OF SCI & TECH

Adaptive gain image enhancement method based on fractional order multi-scale entropy fusion

The invention discloses an adaptive gain image enhancement method based on fractional order multi-scale entropy fusion. The adaptive gain image enhancement method comprises the steps: dividing an original underwater image into non-overlapping rectangular image blocks; obtaining enhanced output images which are consistent with the scale number and based on the fractional order; calculating the information entropy and contrast of the fused image; determining an output image with enhanced contrast in the image block; obtaining a global contrast enhanced image; converting the original underwater image from the RGB image into a grayscale image; calculating a gradient image corresponding to the grayscale image, and solving an adaptive gain function of the gradient image; calculating a final adaptive gain underwater enhanced image based on fractional order multilayer entropy fusion; and outputting an adaptive gain underwater enhanced image based on fractional order multilayer entropy fusion.According to the adaptive gain image enhancement method, enhancement processing is carried out on the underwater image, so that details of the enhanced image are richer and clearer, and the contrast ratio, information entropy, color information and the like of the whole image can be further improved.
Owner:CHANGZHOU INST OF TECH

Medical digital subtraction image fusion method based on ridgelet transformation

InactiveCN101799918AIncrease information entropyReduce root mean square error rateImage enhancementFuzzy methodTransformation matrix
The invention discloses a medical digital subtraction image fusion method based on ridgelet transformation, comprising the following steps of: (1) respectively carrying out the ridgelet transformation on two images to obtain ridgelet transformation matrixes; (2) fusing; (3) carrying out ridgelet inverse transformation on the fused ridgelet transformation matrixes to obtain a reconstructed image, i.e. a fused image. The invention is characterized in that in step (1), setting an initial judging threshold value and a step length for carrying out the ridgelet transformation, reconstructing the fused image by utilizing inverse transformation, calculating the information entropies of the fused image, changing the judging threshold value by using a dynamic fuzzy method according to the step length, repeating the operation, and then obtaining the ridgelet transformation matrixes in step (1) by using the judging threshold value corresponding to the maximum information entropy as the final judging threshold value. The invention can effectively improve the information entropies of the fused image, lower the error rates of mean square roots and has the performance better than that of other traditional fusion method. The algorithmic time has low complexity, the obtained result is more accurate, and therefore, the invention greatly enriches the grain details of medical images.
Owner:SUZHOU UNIV

Image fusion method and device

The invention relates to an image fusion method and an image fusion device. the method comprises: obtaining a plurality of to-be-fused images corresponding to the same scene; performing multilayer wavelet decomposition on each to-be-fused image by utilizing a two-dimensional discrete wavelet transform function; obtaining an approximation coefficient matrix corresponding to the low-frequency layerand a detail coefficient matrix group corresponding to each high-frequency layer in the plurality of high-frequency layers; performing weighting calculation on the approximation coefficient matrixes corresponding to the plurality of images to be fused; obtaining a target approximation coefficient matrix, determining a first target detail coefficient matrix group according to a first preset algorithm and the detail coefficient matrix group corresponding to the high-frequency layer at the highest layer number; meanwhile, determining a second target detail coefficient matrix group according to asecond preset algorithm and the detail coefficient matrix group corresponding to the high-frequency layers of the remaining layers, and then generating a fusion image according to the target approximation coefficient matrix, the first target detail coefficient matrix group and the second target detail coefficient matrix group, so that the fusion image is clearer, and the fusion effect is improved.
Owner:TCL CHINA STAR OPTOELECTRONICS TECH CO LTD

Method and device for improving information entropy of histogram technology enhanced image

The invention provides a method and device for improving the information entropy of a histogram technology enhanced image, and the method comprises the steps of obtaining the frequency of occurrence of each gray scale of the enhanced image, storing the gray scale of which the frequency is not zero in a first array ideq, and storing the frequency in a second array heq; calculating a difference value jg (j) of adjacent gray levels in the ideq and storing the difference value jg (j) in a third array jg; taking jg (j) sequentially from jg, and when jg (j) is not 1, calculating a gray interpolationtemp and a corresponding occurrence frequency htemp; performing interpolation according to the temp and the htemp; jg (j) taking all the updated ideq and heq; calculating a difference value jg1 (j) of adjacent gray levels in the updated ideq and storing the difference value jg1 (j) in jg1; and if jg1 is equal to jg, outputting an image matrix. Therefore, the image enhanced by the histogram technology is subjected to grayscale interpolation, so that the image has high contrast, high information entropy and high signal-to-noise ratio, and image details are clearly presented.
Owner:JIANGSU UNIV OF TECH

Image fusion method of a filter preset deep learning neural network

The invention provides an image fusion method of a filter preset deep learning neural network. The image fusion method mainly solves the problem that in an existing multi-scale wavelet transform imagefusion method, the fusion image information entropy and the average gradient are low. According to the implementation scheme, the method comprises the following steps of presetting asingle-layer deconvolution network to be a four-order Butterworth filter; obtaining a sample image; using the sample image to train a single-layer deconvolution network filter; Inferring a feature map of the to-be-fused image by using the single-layer deconvolution network trained by the filter; fusing the feature map of the to-be-fused image; and performing convolution summation on the fusion feature map and a filter of the single-layer deconvolution network to generate a fusion image. According to the method, the fused image with richer information and clearer details can be stably and effectively obtained,the information entropy and the average gradient of the multi-focus fused image are improved, and the method can be used for shooting scenes of a multi-camera mobile phone and a digital camera.
Owner:XIDIAN UNIV

Image defogging method and system, computer equipment, storage medium and terminal

PendingCN114677289AAccurate segmentationImprove defects such as failureImage enhancementImage analysisGray levelGradation
The invention belongs to the technical field of image defogging, and discloses an image defogging method and system, computer equipment, a storage medium and a terminal.The image defogging method comprises the steps that a cumulative distribution function is constructed by counting the adjacent gray probability of a haze image, and the average threshold value of pixels is obtained according to the concentrated distribution degree of the gray levels of the pixels; according to the maximum connectivity of the sky area, obtaining a sky area and a non-sky area which are roughly segmented; the difference between pixel gray levels of the sky and the non-sky area is enhanced through guiding filtering, and accurate segmentation of the sky area and the non-sky area is achieved through the Otsu algorithm; the transmissivity of the sky area is estimated through logarithmic adaptive transformation, the transmissivity of the non-sky area is estimated through an improved dark channel prior algorithm, and image defogging is achieved by synthesizing the transmissivity of corresponding pixels of the sky area and the transmissivity of corresponding pixels of the non-sky area. The atmospheric light value Ac of the pixel channel can be accurately obtained by calculating the gray value of the pixel point, and the defect that a dark channel prior algorithm fails in bright areas such as the sky is overcome.
Owner:XIDIAN UNIV

A text feature extraction method based on inter-class discrimination and intra-class high representation

The invention discloses a text feature extracting method based on inter-class distinctness and intra-class high representation degree. The method comprises the following steps: preprocessing a training set text; calculating the class distinctness of each feature word through an improved feature selecting method so as to select feature words with more class representation, wherein the selected feature words are of high distinctness among different classes; and further screening the selected feature words which are of high class distinctness based on the intra-class distribution rate and information gain (IG) of the feature words. With the adoption of the method, the feature selection is carried out twice to select the feature words which are of high intra-class information entropy and high intra-class distribution rate, and thus the classifying efficiency and accuracy can be improved; in addition, the calculation is simple, so that the text classifying speed and accuracy can be improved.
Owner:CHENGDU WANGAN TECH DEV CO LTD

Medical digital subtraction image fusion method based on ridgelet transform

The invention discloses a medical digital subtraction image fusion method based on ridgelet transformation, which comprises the following steps: (1) respectively performing ridgelet transformation on two images to obtain a ridgelet transformation matrix; (2) performing fusion processing; ( 3) Carry out ridgelet inverse transform to the ridgelet transformation matrix after fusion, and the reconstructed image obtained is the image after fusion; it is characterized in that: in step (1), the initial judgment threshold and the step size are set, and the process is carried out accordingly. Ridgelet transform, use the inverse transformation to reconstruct the fusion image, calculate the information entropy of the fusion image, use the dynamic fuzzy method to change the judgment threshold according to the step size and repeat the above operation, use the judgment threshold corresponding to the maximum information entropy as the final judgment threshold, and obtain the step (1 ) described ridgelet transformation matrix. The invention can effectively improve the information entropy of the fusion image, reduce the root mean square error rate, and the performance is better than other traditional fusion methods. The time complexity of the algorithm is low, and the results obtained are relatively accurate, which greatly enriches the texture details of medical images.
Owner:SUZHOU UNIV

File stream byte group data encryption and network transmission method

The invention relates to the field of file transmission, and particularly provides a file stream byte group data encryption and network transmission method. The file stream byte group data encryptionand network transmission method comprises the following steps: reading a file to be encrypted in a file stream manner to obtain a file stream byte array a of the file; performing a round of exclusiveOR processing on the array a and the logistic mapping iteration value to obtain a new file stream byte array b; scrambling the array b, sorting the sequences by using a logistic iterative sequence, and replacing the array b according to the logistic sequence to obtain a new byte array c; and performing BASE64 encoding on the finally obtained byte array to obtain a character string to be transmitted. Compared with the prior art, encryption is carried out from the byte stream level, so that the converted new coded bytes have higher information entropy and lower byte correlation degree and are used for resisting statistical attacks and inscription attacks, a guarantee is provided for network transmission security, and the method has good popularization value.
Owner:天元大数据信用管理有限公司

Anonymous method based on sensitive hierarchical information entropy

PendingCN114580010ASolve the problem of low data availabilityIncrease information entropyDigital data protectionData setData availability
The invention relates to the technical field of data anonymity, in particular to an anonymity method based on sensitive hierarchical information entropy, which comprises the following steps: acquiring a published data set; establishing an anonymous model based on the published data set; establishing an information loss measurement standard model based on the information entropy of the published data set; traversing the published data set based on the information loss measurement standard model to obtain a maximum tuple with the maximum privacy security index, and adding the maximum tuple into a corresponding equivalent group in the anonymous model; and replacing the value of the maximum tuple with the quasi-identification attribute center of the equivalent group to obtain an anonymous data set, and processing the published data set by introducing an information loss measurement standard model established by the information entropy and an anonymous model to obtain the anonymous data with the highest information entropy, namely the highest data availability. The problem that an existing anonymous method is low in data availability after data anonymization is solved.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY

Secret key generation method based on channel fingerprints and auxiliary data

The invention discloses an end-to-end key generation method based on channel fingerprints and auxiliary data. The method comprises the steps that a sending end generates a random key; The sending endtraverses the channel characteristic data , and judges whether the data falls into a quantization interval or not; the sending end quantizes the channel characteristic data by using a zero-leakage quantization method; the sending end obtains an auxiliary data generation function, calculates an auxiliary data value and sends the auxiliary data value to the receiving end; the receiving end traversesthe auxiliary data and restores the channel characteristic data; and the receiving end judges whether the restored channel characteristic data is equal to the channel characteristic data detected bythe receiving end or not, if not, the secret key is restored directly, if yes, the secret key is restored according to the maximum likelihood algorithm, and finally the generated secret key is obtained. According to the invention, channel characteristic data processing, secret key generation and corresponding auxiliary data extraction are carried out through a corresponding algorithm, so that therandomness and consistency rate of the secret key of the end-to-end communication equipment are enhanced, and higher communication security is ensured.
Owner:INFORMATION & COMM BRANCH OF STATE GRID JIANGSU ELECTRIC POWER +1

Underwater illumination non-uniform image enhancement method based on alternating direction multiplier method

The invention discloses an underwater illumination non-uniform image enhancement method based on an alternating direction multiplier method, and the method comprises the steps of converting an image from an RGB color space to a Lab color space when an initial illumination image is estimated, and extracting a brightness component as the initial illumination image; then, on the basis of an alternating direction multiplier method principle, constructing a constraint optimization equation of an augmented Lagrange framework, and solving the optimization equation through iteration to obtain a precise illumination map; according to the Retinex theory, converting an image to be processed and an illumination image to a logarithm domain to obtain a reflection image in the logarithm domain, and then carrying out exponential operation to obtain an enhanced image; and finally, inhibiting underwater noise by using a bilateral filter to obtain a finer underwater enhanced image. According to the method provided by the invention, the quality of the underwater illumination non-uniform image is effectively improved, and compared with similar methods, the method provided by the invention has better performance in the aspects of removing the influence of illumination on the underwater image and retaining image details.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Dynamic Correction Method of Image Light Intensity Based on Environmental Factors

The invention discloses a method for dynamically calibrating image light intensity on the basis of environmental factors. The method includes the steps of reversing an image to distinctly display key areas; segmenting the image into NxN sub-blocks for processing; processing the sub-blocks via power transformation; processing the sub-blocks via grayscale mapping transformation; subjecting the sub-blocks to histogram processing; processing the sub-blocks via dynamic fuzzy histogram equalization; respectively processing the sub-blocks via masking and filtering by a hybrid space processing method; iterating every sub-blocks of the NxN sub-blocks by a Lucy_Richardson filter; respectively calculating to optimize the power transformation step and the dynamic fuzzy histogram equalization step of the sub-blocks by a fuzzy logic theory; and reversing the image again and outputting the final image, wherein the N is an integer nine, the maximum information entropy is judged as the optimum optimizing standard. By the aid of the method, information entropy of the image is effectively increased, and good light calibrating effect is obtained.
Owner:SUZHOU SOUKE INFORMATION TECH

Multi-channel data processing method, device, electronic device and storage medium

The invention discloses a multi-channel data processing method, device, electronic equipment and storage medium. Including: sending the inconsistent data independently generated by the corresponding functional modules of each channel in the combined failsafe architecture to each other channel in the combined failsafe architecture; sending the inconsistent data independently generated by the corresponding functional modules of each channel and receiving Inconsistent data independently generated by the corresponding functional modules of each other channel in the combined fail-safe architecture, according to the preset data processing method, each channel in the combined fail-safe architecture is processed independently, and each channel is independent The processed new data; the subsequent input data of each channel is determined according to the new data independently processed by each channel. It can improve the identification ability and applicability of the combined fault safety technology to the abnormality of the channel, play the role of the combined fault safety technology, improve the safety, and ensure the independence of the channel.
Owner:CRSC RESEARCH & DESIGN INSTITUTE GROUP CO LTD
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