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36results about How to "Accurate quality evaluation" patented technology
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Fractalanalysis method for crack propagation path of concretemember
InactiveCN105910902AMesocosmDeep understandingGeometric CADMaterial strength using tensile/compressive forcesAlgorithmData point
The invention relates to a fractalanalysis method for a crack propagation path ofa concretemember. The method comprises the following steps: (1) calculating an actual cracking loadvalue of the concrete member, performing stepwise loading accordingly, and lowering the increasing speed of the load when an external load value is close to a cracking load; (2) acquiring crack image information of the surface of the concrete member during each loading; (3) sharpening images, selecting a main crack, and correspondingly finding main crack images during each step of loading; (4) performing refinement segmentation processing according to a coating defined box-counting method, calculatingbasic parameter N(r) and r of the main crack during each loading, and performing regression with a computer to solve a fractal dimension value D; (5)establishing coordinates ona processedslit image, defining certain interpolation data points,inputting the interpolation data points into the computer to simulate fractal interpolation calculation in order to obtain length and morphological features of a slit of the concrete member, simulating prediction and saving a simulation result. By adopting the method, the failure law of the concrete member can be acquired more accurately.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY
Virtual viewpoint video quality evaluation method
ActiveCN106341677AAccurate quality evaluationComprehensive quality evaluationTelevision systemsDigital video signal modificationTime domainSpace time domain
The invention relates to a virtual viewpoint video quality evaluation method. According to the invention, time domain blink distortion of virtual viewpoint video is calculated by taking all pixels in a space-time domain unit as a unit, so that erroneous estimation which is brought about by a pixel-to-pixel time domain blink distortion calculation mode for virtual viewpoint video human eye perception distortion is avoided. The virtual viewpoint video quality evaluation method not only considers distortion brought about by a depth image error but also considers distortion introduced by left and right viewpoint texture images when performing calculation on the time domain blink distortion of the virtual viewpoint video. The virtual viewpoint video quality evaluation method can effectively evaluate the time domain blink distortion which imposes great influences on the subjective quality in the virtual viewpoint video, thereby more conforming to a result of human eye subjective perception when the virtual viewpoint video quality is evaluated, and enabling virtual viewpoint video quality evaluation to be more accurate and more comprehensive.
Owner:SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
Stereo image quality evaluation method through parallax compensation and inter-viewpoint filtering
ActiveCN105654465AAccurate massAccurate quality evaluationImage enhancementImage analysisViewpointsImaging quality
The invention discloses a stereo image quality evaluation method through parallax compensation and inter-viewpoint filtering. A high-frequency image and a low-frequency image are obtained by performing parallax compensation and inter-viewpoint filtering on left and right viewpoint images of a stereo image, description of the stereo perception characteristics of the stereo image is completed in the frequency domain, and the quality of the stereo image can be more accurately evaluated; two-dimensional wavelet transformation is performed on the low-frequency image, an approximation coefficient matrix, a horizontal detail coefficient matrix, a vertical detail coefficient matrix and a diagonal detail coefficient matrix are extracted to acquire a part of characteristics, and the characteristics can effectively enhance accuracy of quality evaluation of the distorted stereo image; and the mapping relationship between the characteristic vector of the stereo image and the subjective image quality is constructed by utilizing a support vector regression method so that complex simulation of a human visual system working mechanism can be avoided, excessive dependence on the training process can also be avoided and thus the correlation between the subjective quality and the objective prediction quality can be enhanced.
Owner:NINGBO UNIV
Method for detecting volatile components in Artemisia argyl oil, and application thereof
PendingCN112034084AShort analysis timeReduce lossComponent separationBiotechnologyGas liquid chromatographic
The invention provides a method for detecting volatile components in Artemisia argyl oil, and application thereof, and relates to the technical field of volatile component detection. The detection method is used for detecting the the volatile components in the Artemisia argyl oil through a gas chromatography-mass spectrometry detection technology. A spectrum library retrieval technology is used for carrying out retrieval qualitation on a chromatographic mass spectrogram in a full-scanning Scan mode to obtain qualitative data of all volatile components; and meanwhile, the peak area of the chromatographic mass spectrogram of the main volatile substances is analyzed in the SIM mode by using a segmented scanning technology, and the content of each main volatile substance is further calculatedby using an external standard method. The method has the characteristics of simplicity, accuracy, specificity and high practicability.
Owner:JINAN UNIVERSITY
Method and system for evaluating order quality
InactiveCN107067178AAccurate quality evaluationChoose accuratelyBuying/selling/leasing transactionsResourcesComputer scienceAssessment methods
The invention discloses a method and a system for evaluating order quality. The method comprises steps: statistics on order information interacting with a network server over a period of time is carried out; abnormity types of abnormal orders in the order information are analyzed, and the weight of each abnormity type of orders is calculated; according to the weight, the second number of abnormal orders is calculated; the ratio of the second number to the total number is converted to an order quality evaluation value; whether the order quality evaluation value is smaller than a threshold is judged, and if yes, the threshold is characterized as the quality of orders interacting with the network server over the period of time; and if not, the order quality evaluation value is characterized as the quality of orders interacting with the network server over the period of time. Correct and effective quality evaluation can be executed on orders reserved by a user, correct and effective guidance and recommendation can be provided for reservation by subsequent users, a more correct choice can be made, and possible abnormal orders can be prevented from being generated.
Owner:CTRIP COMP TECH SHANGHAI
Video quality evaluation method and device
ActiveCN112911281AImprove selection qualityAccurate quality evaluationTelevision systemsDigital video signal modificationRadiologyVideo quality
The invention discloses a video quality evaluation method and device, and the method comprises the steps: dividing to-be-evaluated video data into a plurality of video segments based on a preset sampling interval, and determining the feature points of each frame of image in each video segment; and each video segment, performing feature point matching according to feature points in the frame of image and an adjacent frame of image, and determining the motion intensity of the frame of image according to the position information of each matched feature point in the two frames of images, so that the key frame is determined according to the motion intensity of each frame of image; and finally, according to the quality score of each key frame, determining the quality score of the video data, and performing video display according to the quality score. Through the position information of the matched feature points in each two adjacent frames of images, the motion intensity of each frame of image is determined, and based on the motion intensity of each frame of image, the key frame selection quality is improved, so that the video quality evaluation is more accurate.
Owner:BEIJING SANKUAI ONLINE TECH CO LTD
Quality detection method of Dendrobium denneanum Kerr
ActiveCN108398513AAccurate quality evaluationSolve the problem of "curse of dimensionality"Component separationSchaftosideFirst generation
The invention discloses a quality detection method of Dendrobium denneanum Kerr. The quality detection method comprises: 1) sequencing by using ITS-26SE and ITS-17SE as primers to identify the varietyof a to-be-detected Dendrobium herb; 2) carrying out chromatographic detection on n samples to obtain detection data using a chemical small molecule component schaftoside and / or naringenin as a reference component; 3) respectively carrying out fingerprint detection on the samples to obtain the fingerprint peak area value of the full chemical components of Dendrobium denneanum Kerr; and 4) establishing an analysis model by using the content value of the schaftoside and / or naringenin in the chromatographic data as the response variable and using the peak area value of other components in the fingerprint as the independent variable, screening the variable through a Lasso method, and establishing the characteristic fingerprint model related to the chemical small molecule component. Accordingto the present invention, through the first-generation sequencing and the characteristic fingerprinting, the quality of Dendrobium denneanum Kerr is precisely identified and controlled.
Owner:北京蓝标一成科技有限公司
Method for evaluating video quality from virtual viewpoint
ActiveCN106341677BAccurate quality evaluationComprehensive quality evaluationTelevision systemsDigital video signal modificationTime domainSpace time domain
Owner:SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
Quality detection method of Dendrobium catenatum Lindley
ActiveCN108398492AAccurate quality evaluationSolving the Curse of DimensionalityComponent separationMicrobiological testing/measurementPeak areaHerb
The invention discloses a quality detection method of Dendrobium catenatum Lindley. The quality detection method comprises: 1) sequencing by using ITS-26SE and ITS-17SE as primers to identify the variety of a to-be-detected Dendrobium herb; 2) carrying out chromatographic detection on n samples to obtain detection data using a chemical small molecule component schaftoside and / or naringenin as a reference component; 3) respectively carrying out fingerprint detection on the samples to obtain the fingerprint peak area value of the full chemical components of Dendrobium catenatum Lindley; and 4) establishing an analysis model by using the content value of the schaftoside and / or naringenin in the chromatographic data as the response variable and using the peak area value of other components inthe fingerprint as the independent variable, screening the variable through a Lasso method, and establishing the fingerprint model related to the chemical small molecule component. According to the present invention, through the first-generation sequencing and the characteristic fingerprinting, the quality of Dendrobium catenatum Lindley is precisely identified and controlled.
Owner:北京蓝标一成科技有限公司
Quality detecting method of Dendrobium aphyllum
ActiveCN108398510AAccurate quality evaluationSolve the problem of "curse of dimensionality"Component separationSchaftosideFirst generation
The invention discloses a quality detecting method of Dendrobium aphyllum. The quality detection method comprises: 1) sequencing by using ITS-26SE and ITS-17SE as primers to identify the variety of ato-be-detected Dendrobium herb; 2) carrying out chromatographic detection on n samples to obtain detection data using a chemical small molecule component schaftoside and / or naringenin as a reference component; 3) respectively carrying out fingerprint detection on the samples to obtain the fingerprint peak area value of the full chemical components of Dendrobium aphyllum; and 4) establishing an analysis model by using the content value of the schaftoside and / or naringenin in the chromatographic data as the response variable and using the peak area value of other components in the fingerprint asthe independent variable, screening the variable through a Lasso method, and establishing the characteristic fingerprint model related to the chemical small molecule component. According to the present invention, through the first-generation sequencing and the characteristic fingerprinting, the quality of Dendrobium aphyllum is precisely identified and controlled.
Owner:北京蓝标一成科技有限公司
Mobile inspection video quality correction method based on significance multi-feature fusion
ActiveCN110312124AFit needsImprove experienceImage enhancementImage analysisMotion vectorBlock effect
The invention relates to a mobile inspection video quality correction method based on saliency multi-feature fusion, belongs to the technical field of video quality correction, and solves the problemthat effective quality evaluation and correction cannot be carried out on a mobile inspection video in the prior art. The method comprises the following steps: partitioning any static image comprisinga to-be-detected object in a mobile inspection video, and determining all macro blocks comprising identification characteristics of the to-be-detected object and significance factors of the macro blocks; traversing other images in the mobile inspection video by using each macro block to obtain an image block most similar to the macro block in each frame of image so as to obtain a motion vector ofeach macro block and a significance matrix of each frame of image; determining a block effect characteristic value, a fuzzy effect characteristic value and an information entropy characteristic valueof the mobile inspection video according to the obtained significance matrix; and establishing a video quality evaluation model, judging whether the video quality is qualified or not, and if not, correcting camera parameters until the video quality is qualified.
Owner:CHINA UNIV OF MINING & TECH
Method for measuring contents of alkaloids, lignans and nucleosides in isatis root or preparation thereof by using quantitative analysis single-maker method
The invention discloses a method for measuring the contents of alkaloids, lignans and nucleosides in the isatis root or preparation thereof by using a quantitative analysis single-maker method. With low-cost stable-structure avaible alkaloids compound (R,S)-epigoitrin as a reference, relative correction factors with lignans compound clemastanin B and nucleoside compounds cytidine, uridine, vernine, and adenosine are established. Therefore, the contents of another five kinds of lignan and nucleoside contents with high content rates are calculated by using the correction factors only by measuring the content of the(R,S)-epigoitrin of the isatis root or preparation, thereby carrying out multi-indicator quality evaluation on the isatis root or preparation simply, conveniently, comprehensivelyand accurately. The quality controllability and curative effect stability of the product can be guaranteed; and the detection cost and time can be saved.
Owner:GUANGZHOU BAIYUSN HUTCHISON WHAMPOA CHINESE MEDICINE
Special malt quality evaluation method
The invention discloses a special malt quality evaluation method, which comprises the steps of: S1, physical and chemical index analysis; S2, flavor substance analysis; S3, sensory evaluation; S4, flavor wheel drawing; S5, and comprehensive analysis of conclusions obtained in the above steps, and finally determination of a variety of special malt. The special malt quality evaluation method effectively solves the problems that no unified standard exists in the special malt industry in China at present, product positioning is not clear and the quality is uneven, and can evaluate the quality of the special malt truly and precisely.
Owner:粤海永顺泰(广州)麦芽有限公司
Quality detection method of Dendrobium fimbriatum Hook
ActiveCN108398516AAccurate quality evaluationSolve the problem of "curse of dimensionality"Component separationChromatographic separationSchaftoside
The invention discloses a quality detection method of Dendrobium fimbriatum Hook. The quality detection method comprises: 1) sequencing by using ITS-26SE and ITS-17SE as primers to identify the variety of a to-be-detected Dendrobium herb; 2) carrying out chromatographic detection on n samples to obtain detection data using a chemical small molecule component schaftoside and / or naringenin as a reference component; 3) respectively carrying out fingerprint detection on the samples to obtain the fingerprint peak area value of the full chemical components of Dendrobium fimbriatum Hook; and 4) establishing an analysis model by using the content value of the schaftoside and / or naringenin in the chromatographic data as the response variable and using the peak area value of other components in thefingerprint as the independent variable, screening the variable through a Lasso method, and establishing the characteristic fingerprint model related to the chemical small molecule component. According to the present invention, through the first-generation sequencing and the characteristic fingerprinting, the quality of Dendrobium fimbriatum Hook is precisely identified and controlled.
Owner:北京蓝标一成科技有限公司
Map detection method and device
PendingCN113758492ARealize quality inspectionEfficient qualityInstruments for road network navigationRegistering/indicating working of vehiclesSensing dataVirtual vehicle
The invention discloses a map detection method and device, and relates to the technical field of computers. A specific embodiment of the method comprises the steps of obtaining vehicle scene data of a real path corresponding to each map path in a to-be-detected map; wherein the vehicle scene data comprises sensing data acquired by at least one sensor installed on a real vehicle in the driving process of the real vehicle along the real path, and positioning truth value data of the real vehicle in the driving process; indicating a virtual vehicle to drive along a virtual path corresponding to the real path in a pre-established simulation platform, and determining simulation positioning data of the virtual vehicle in the driving process by using a preset positioning algorithm, the sensing data and a to-be-detected map; and detecting a to-be-detected map according to the simulation positioning data and the positioning truth value data. According to the embodiment, the map quality can be automatically, efficiently and accurately detected based on the simulation platform.
Owner:BEIJING JINGDONG 360 DEGREE E COMMERCE CO LTD
Method for assessing electrocardiogram signal quality
ActiveUS20200107786A1Accurate estimateAccurate and effective signal quality evaluationElectrocardiographySensorsSignal qualitySignal cancellation
A method for assessing electrocardiogram signal quality, the method comprising: receiving heartbeat analysis data by processing electrocardiogram data acquired from an electrocardiogram monitoring device; extracting position information and width information of a QRS complex in the heartbeat analysis data; extracting an RR interval signal between two adjacent QRS complex signals; performing QRS complex signal cancellation processing on the RR interval signal to obtain an RR interval signal for which the QRS complex signal is removed; filtering the processed RR interval signal without the QRS complex signal, and performing envelope calculation on the filtered signal to obtain the average power of a noise signal of the RR interval signal for which the QRS complex signal is removed; obtaining a signal quality evaluation index according to the average power of the noise signal and the power of the QRS complex signal.
Owner:SHANGHAI LEPU CLOUDMED CO LTD
A no-reference video quality assessment method based on feature fusion and recurrent neural network
ActiveCN110677639BAccurate quality evaluation indexEasy extractionTelevision systemsPattern recognitionEngineering
Owner:COMMUNICATION UNIVERSITY OF CHINA
A kind of quality detection method of dendrobium officinale
ActiveCN108398492BAccurate quality evaluationSolve the problem of "curse of dimensionality"Component separationMicrobiological testing/measurementBiotechnologyMedicinal herbs
The invention discloses a quality detection method of Dendrobium catenatum Lindley. The quality detection method comprises: 1) sequencing by using ITS-26SE and ITS-17SE as primers to identify the variety of a to-be-detected Dendrobium herb; 2) carrying out chromatographic detection on n samples to obtain detection data using a chemical small molecule component schaftoside and / or naringenin as a reference component; 3) respectively carrying out fingerprint detection on the samples to obtain the fingerprint peak area value of the full chemical components of Dendrobium catenatum Lindley; and 4) establishing an analysis model by using the content value of the schaftoside and / or naringenin in the chromatographic data as the response variable and using the peak area value of other components inthe fingerprint as the independent variable, screening the variable through a Lasso method, and establishing the fingerprint model related to the chemical small molecule component. According to the present invention, through the first-generation sequencing and the characteristic fingerprinting, the quality of Dendrobium catenatum Lindley is precisely identified and controlled.
Owner:北京蓝标一成科技有限公司
A Stereoscopic Image Quality Evaluation Method Using Disparity Compensation Interview Filtering
ActiveCN105654465BAccurate massAccurate quality evaluationImage enhancementImage analysisViewpointsImaging quality
Owner:NINGBO UNIV
A kind of quality detection method of Huoshan Dendrobium
ActiveCN108398511BAccurate quality evaluationSolve the problem of "curse of dimensionality"Component separationBiotechnologyDendrobium huoshanense
The invention discloses a quality detection method of Dendrobium huoshanense. The quality detection method comprises: 1) sequencing by using ITS-26SE and ITS-17SE as primers to identify the variety ofa to-be-detected Dendrobium herb; 2) carrying out chromatographic detection on n samples to obtain detection data using a chemical small molecule component schaftoside and / or naringenin as a reference component; 3) respectively carrying out fingerprint detection on the samples to obtain the fingerprint peak area value of the full chemical components of Dendrobium huoshanense; and 4) establishingan analysis model by using the content value of the schaftoside and / or naringenin in the chromatographic data as the response variable and using the peak area value of other components in the fingerprint as the independent variable, screening the variable through a Lasso method, and establishing the characteristic fingerprint model related to the chemical small molecule component. According to thepresent invention, through the first-generation sequencing and the characteristic fingerprinting, the quality of Dendrobium huoshanense is precisely identified and controlled.
Owner:北京蓝标一成科技有限公司
A kind of quality detection method of Dendrobium nobile
ActiveCN108398490BAccurate quality evaluationSolve the problem of "curse of dimensionality"Component separationBiotechnologySchaftoside
The invention discloses a quality detection method of Dendrobium nobile Lindley. The quality detection method comprises: 1) sequencing by using ITS-26SE and ITS-17SE as primers to identify the varietyof a to-be-detected Dendrobium herb; 2) carrying out chromatographic detection on n samples to obtain detection data using a chemical small molecule component schaftoside and / or naringenin as a reference component; 3) respectively carrying out fingerprint detection on the samples to obtain the fingerprint peak area value of the full chemical components of Dendrobium nobile Lindley; and 4) establishing an analysis model by using the content value of the schaftoside and / or naringenin in the chromatographic data as the response variable and using the peak area value of other components in the fingerprint as the independent variable, screening the variable through a Lasso method, and establishing the characteristic fingerprint model related to the chemical small molecule component. Accordingto the present invention, through the first-generation sequencing and the characteristic fingerprinting, the quality of Dendrobium nobile Lindley is precisely identified and controlled.
Owner:北京蓝标一成科技有限公司
A kind of video quality evaluation method and device
ActiveCN112911281BImprove selection qualityAccurate quality evaluationTelevision systemsDigital video signal modificationRadiologyVideo quality
This specification discloses a video quality evaluation method and device, which can firstly divide the video data to be evaluated into several video segments based on a preset sampling interval, and determine the feature points of each frame image in each video segment. Then, for each frame of image in each video segment, feature point matching is performed according to the feature points in the frame image and adjacent frame images, and according to the position information of the matched feature points in the two frames of images, respectively, Determine the motion intensity of the frame image, so as to determine the key frame according to the motion intensity of each frame image. Finally, the quality score of the video data is determined according to the quality score of each key frame, so as to display the video according to the quality score. The motion intensity of each frame image is determined by the position information of the matching feature points in each adjacent two frame images, and the key frame is screened based on the motion intensity of each frame image, which improves the selection quality of key frames and makes the video The quality evaluation is more accurate.
Owner:BEIJING SANKUAI ONLINE TECH CO LTD
A kind of quality detection method of Dendrobium fringe
ActiveCN108398516BAccurate quality evaluationSolve the problem of "curse of dimensionality"Component separationSchaftosideFirst generation
The invention discloses a quality detection method of Dendrobium fimbriatum Hook. The quality detection method comprises: 1) sequencing by using ITS-26SE and ITS-17SE as primers to identify the variety of a to-be-detected Dendrobium herb; 2) carrying out chromatographic detection on n samples to obtain detection data using a chemical small molecule component schaftoside and / or naringenin as a reference component; 3) respectively carrying out fingerprint detection on the samples to obtain the fingerprint peak area value of the full chemical components of Dendrobium fimbriatum Hook; and 4) establishing an analysis model by using the content value of the schaftoside and / or naringenin in the chromatographic data as the response variable and using the peak area value of other components in thefingerprint as the independent variable, screening the variable through a Lasso method, and establishing the characteristic fingerprint model related to the chemical small molecule component. According to the present invention, through the first-generation sequencing and the characteristic fingerprinting, the quality of Dendrobium fimbriatum Hook is precisely identified and controlled.
Owner:北京蓝标一成科技有限公司
License plate processing method, device and equipment and computer readable storage medium
PendingCN113505790AAccurate quality evaluationEvaluation method is simpleImage enhancementImage analysisImaging processingEngineering
The invention is suitable for the technical field of image processing, and provides a license plate processing method, device and equipment and a computer readable storage medium, and the method comprises the steps of obtaining a license plate image of a to-be-recognized license plate; processing each license plate image to obtain license plate evaluation information corresponding to each license plate image, wherein the license plate evaluation information comprises the horizontal similarity of the license plate to be recognized; and determining a score corresponding to each license plate image according to the license plate evaluation information corresponding to each license plate image, and determining the license plate image with the highest score as a target license plate image. According to the method, when the quality of the license plate image is evaluated, the evaluation method is relatively simple, the quality of the license plate image can be accurately evaluated without a large amount of calculation processes, and the target license plate image with the highest quality can be quickly obtained.
Owner:TP-LINK
Instant messaging video processing method and device and electronic equipment
PendingCN113436161AImprove playback qualityAccurate quality evaluationImage enhancementImage analysisEvaluation resultVideo processing
The invention provides an instant messaging video processing method and device, and electronic equipment. The method comprises the steps of obtaining multiple paths of to-be-mixed stream videos in a current specified time period under instant messaging; performing stream mixing processing on the multiple paths of to-be-mixed videos based on the stream mixing parameters to obtain a path of mixed stream video; performing quality evaluation on the multiple paths of to-be-mixed videos and mixed videos to obtain a first evaluation result and a second evaluation result; and based on the first evaluation result and the second evaluation result, adjusting a flow mixing parameter for performing flow mixing processing on the multi-path flow mixing video in the next specified time period of the current specified time period. According to the mode, accurate quality evaluation can be carried out on videos before and after stream mixing; meanwhile, the flow mixing parameters are adaptively adjusted according to the quality evaluation result of the instant messaging video, and the quality of the instant messaging video is improved.
Owner:BEIJING KINGSOFT CLOUD NETWORK TECH CO LTD
Method for determining the content of alkaloids, lignans and nucleosides in Radix isatidis or its preparations by one-measurement-multiple-evaluation method
The invention discloses a method for determining the content of alkaloids, lignans and nucleosides in Radix isatidis or its preparation by adopting a one-measurement multi-evaluation method. , S)-Yichun is used as a reference to establish its relative correction factor with the lignan compound tetracycline B and the nucleoside compounds cytidine, uridine, guanosine, and adenosine, to achieve by measuring only The content of (R,S)-report Yichun of Radix Isatidis or its preparations, the content of the other 5 kinds of lignans and nucleosides with higher content was calculated by the correction factor, so as to be simple, quick, comprehensive and accurate. The multi-index quality evaluation of its preparation is helpful to ensure the quality of the product is controllable and the curative effect is stable, while saving the testing cost and time.
Owner:GUANGZHOU BAIYUSN HUTCHISON WHAMPOA CHINESE MEDICINE
A kind of quality detection method of dendrobium nobile
ActiveCN108398510BAccurate quality evaluationSolve the problem of "curse of dimensionality"Component separationBiotechnologySchaftoside
The invention discloses a quality detecting method of Dendrobium aphyllum. The quality detection method comprises: 1) sequencing by using ITS-26SE and ITS-17SE as primers to identify the variety of ato-be-detected Dendrobium herb; 2) carrying out chromatographic detection on n samples to obtain detection data using a chemical small molecule component schaftoside and / or naringenin as a reference component; 3) respectively carrying out fingerprint detection on the samples to obtain the fingerprint peak area value of the full chemical components of Dendrobium aphyllum; and 4) establishing an analysis model by using the content value of the schaftoside and / or naringenin in the chromatographic data as the response variable and using the peak area value of other components in the fingerprint asthe independent variable, screening the variable through a Lasso method, and establishing the characteristic fingerprint model related to the chemical small molecule component. According to the present invention, through the first-generation sequencing and the characteristic fingerprinting, the quality of Dendrobium aphyllum is precisely identified and controlled.
Owner:北京蓝标一成科技有限公司
A kind of quality detection method of dendrobium drumstick
ActiveCN108398515BAccurate quality evaluationSolve the problem of "curse of dimensionality"Component separationBiotechnologyChemical composition
The invention discloses a quality detection method of Dendrobium chrysotoxum Lindley. The quality detection method comprises: 1) sequencing by using ITS-26SE and ITS-17SE as primers to identify the variety of a to-be-detected Dendrobium herb; 2) carrying out chromatographic detection on n samples to obtain detection data using a chemical small molecule component schaftoside and / or naringenin as areference component; 3) respectively carrying out fingerprint detection on the samples to obtain the fingerprint peak area value of the full chemical components of Dendrobium chrysotoxum Lindley; and4) establishing an analysis model by using the content value of the schaftoside and / or naringenin in the chromatographic data as the response variable and using the peak area value of other componentsin the fingerprint as the independent variable, screening the variable through a Lasso method, and establishing the characteristic fingerprint model related to the chemical small molecule component.According to the present invention, through the first-generation sequencing and the characteristic fingerprinting, the quality of Dendrobium chrysotoxum Lindley is precisely identified and controlled.
Owner:蓝标一成(海南)生物科技有限公司
Face image quality assessment method, computer device and computer-readable storage medium
ActiveCN110838119BAccurate quality evaluationMeet the needs of subsequent useImage enhancementImage analysisComputer graphics (images)Imaging quality
The present invention provides a face image quality assessment method, a computer device, and a computer-readable storage medium. The method includes acquiring an initial image, dividing the initial image into multiple sub-images, and calculating the average gray value of each sub-image. and the variance, and perform normalized calculations on each sub-image; perform discrete cosine transform on each normalized sub-image and extract low-frequency coefficients, and use the gray value and low-frequency coefficients of each sub-image to calculate the sub-image Weighted features; calculate a similarity probability score for each sub-image with respect to a standard face sub-image, and calculate the final score for this initial image. The present invention also provides a computer device and a computer-readable storage medium for realizing the above method for evaluating the quality of a face image. The method of the present invention takes into account the influence of various conditions such as illumination, posture, and occlusion on the face image, and can more accurately evaluate the quality of each image.
Owner:ALLWINNER TECH CO LTD
A No-reference Color Image Quality Evaluation Method Based on Local Binary Model
ActiveCN106600597BAccurate quality evaluationImprove relevanceImage enhancementImage analysisColor imageFeature vector
The invention discloses a non-reference color image quality evaluation method based on a local binary pattern. The non-reference color image quality evaluation method comprises the steps of: calculating mutual information, a mean value, variance, a contrast ratio and information entropy of a distorted image, regarding the mutual information, the mean value, the variance, the contrast ratio and the information entropy as feature values of the distorted image, and constructing multi-dimensional feature vectors of the distorted image; training the multi-dimensional feature vectors of the distorted image and corresponding human eye subjective scores by utilizing support vector regression analysis, so as to obtain a function relationship model between the multi-dimensional feature vectors of the distorted image and the human eye subjective scores; and regarding multi-dimensional feature vectors of a distorted image to be evaluated as input values of the function relationship model, and acquiring an output value of the function relationship model serving as a quality evaluation value of the distorted image to be evaluated. The non-reference color image quality evaluation method fully considers color change of the image, and can conduct quality evaluation on the color image more efficiently and precisely.
Owner:HUAZHONG UNIV OF SCI & TECH +1
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