WO2022178978A1 - 一种基于最大化比率和线性判别分析的数据降维方法 - Google Patents
一种基于最大化比率和线性判别分析的数据降维方法 Download PDFInfo
- Publication number
- WO2022178978A1 WO2022178978A1 PCT/CN2021/090835 CN2021090835W WO2022178978A1 WO 2022178978 A1 WO2022178978 A1 WO 2022178978A1 CN 2021090835 W CN2021090835 W CN 2021090835W WO 2022178978 A1 WO2022178978 A1 WO 2022178978A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- matrix
- data
- label
- discriminant analysis
- linear discriminant
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000009467 reduction Effects 0.000 title claims abstract description 34
- 238000004458 analytical method Methods 0.000 title claims abstract description 29
- 239000011159 matrix material Substances 0.000 claims abstract description 84
- 238000005457 optimization Methods 0.000 claims abstract description 21
- 238000004422 calculation algorithm Methods 0.000 claims abstract description 12
- 238000012549 training Methods 0.000 claims description 10
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 241000411851 herbal medicine Species 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 abstract description 8
- 238000007781 pre-processing Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000003909 pattern recognition Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000000605 extraction Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000013500 data storage Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 238000000701 chemical imaging Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000010187 selection method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/70—Arrangements for image or video recognition or understanding using pattern recognition or machine learning
- G06V10/77—Processing image or video features in feature spaces; using data integration or data reduction, e.g. principal component analysis [PCA] or independent component analysis [ICA] or self-organising maps [SOM]; Blind source separation
- G06V10/7715—Feature extraction, e.g. by transforming the feature space, e.g. multi-dimensional scaling [MDS]; Mappings, e.g. subspace methods
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/10—Terrestrial scenes
- G06V20/13—Satellite images
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
- G06F18/20—Analysing
- G06F18/21—Design or setup of recognition systems or techniques; Extraction of features in feature space; Blind source separation
- G06F18/213—Feature extraction, e.g. by transforming the feature space; Summarisation; Mappings, e.g. subspace methods
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
- G06F18/20—Analysing
- G06F18/21—Design or setup of recognition systems or techniques; Extraction of features in feature space; Blind source separation
- G06F18/214—Generating training patterns; Bootstrap methods, e.g. bagging or boosting
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
- G06F18/20—Analysing
- G06F18/24—Classification techniques
- G06F18/241—Classification techniques relating to the classification model, e.g. parametric or non-parametric approaches
- G06F18/2413—Classification techniques relating to the classification model, e.g. parametric or non-parametric approaches based on distances to training or reference patterns
- G06F18/24133—Distances to prototypes
- G06F18/24143—Distances to neighbourhood prototypes, e.g. restricted Coulomb energy networks [RCEN]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/34—Smoothing or thinning of the pattern; Morphological operations; Skeletonisation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/70—Arrangements for image or video recognition or understanding using pattern recognition or machine learning
- G06V10/764—Arrangements for image or video recognition or understanding using pattern recognition or machine learning using classification, e.g. of video objects
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/70—Arrangements for image or video recognition or understanding using pattern recognition or machine learning
- G06V10/77—Processing image or video features in feature spaces; using data integration or data reduction, e.g. principal component analysis [PCA] or independent component analysis [ICA] or self-organising maps [SOM]; Blind source separation
- G06V10/774—Generating sets of training patterns; Bootstrap methods, e.g. bagging or boosting
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/10—Terrestrial scenes
- G06V20/194—Terrestrial scenes using hyperspectral data, i.e. more or other wavelengths than RGB
Definitions
- the invention belongs to the field of image classification and pattern recognition, and in particular relates to a data dimension reduction method based on maximizing ratio and linear discriminant analysis.
- Data dimensionality reduction technology is an important research topic in the field of image classification and pattern recognition. In the context of big data, the amount of raw data directly obtained in practical application scenarios is huge. Handle the requirements of the hardware platform.
- Data dimensionality reduction is the dimensionality reduction of the original high-dimensional data. While ensuring that the data after dimensionality reduction still retains most of the information contained in the original data, the dimensionality of the data is reduced as much as possible to improve the efficiency of data storage and processing and reduce the need for Requirements for hardware and subsequent data processing algorithms. Since data dimensionality reduction can reduce the data dimension and required storage space, save model training and calculation time, and improve the accuracy of subsequent applied algorithms, data dimensionality reduction technology has been widely used in face recognition, hyperspectral image classification, Chinese herbal medicine classification, etc. In the early data processing of practical application scenarios.
- the current data dimensionality reduction methods include feature selection and feature extraction.
- the feature selection method is to directly select key features from the original high-dimensional data, and the feature extraction is to project the existing features into a new space to form new features.
- the former is beneficial to preserve the physical meaning of the data, while the new features obtained by the latter are difficult to explain, but the effect of feature selection is slightly inferior to that of feature extraction.
- Linear discriminant analysis is a common method for feature extraction, which can well preserve the discriminant information of the data, and is often used in the preprocessing step of data classification. However, the traditional linear discriminant analysis can not be higher than or equal to the total number of categories of the data after dimensionality reduction, and it is easy to be unsolvable due to the non-singularity of the matrix during the solution process.
- the original data features of image classification are often high-dimensional, and too high a dimension may reduce the classification accuracy, and the original data contains redundant information. Using it directly for classification will lead to problems such as slow data processing and low classification accuracy. .
- hyperspectral imaging has been widely used in the classification of ground objects. How to reduce the dimensionality of high-dimensional hyperspectral data, thereby reducing the cost of data storage and processing, and extracting key features and category information of the data is of great importance. practical meaning.
- the traditional linear discriminant analysis method tends to select features with small variance, which are difficult to effectively distinguish between categories, and the traditional linear discriminant analysis needs to invert the intra-class covariance matrix in the solution process, but in many cases the matrix is singular , at this time, the method fails, and the data dimension reduction of the highlight image cannot be performed.
- the traditional linear discriminant analysis must ensure the singularity of the intra-class covariance matrix through preprocessing, in order to achieve dimensionality reduction of high-dimensional data, which leads to complex data processing flow and interaction between the preprocessing algorithm and the data dimensionality reduction algorithm. question.
- the present invention proposes a method based on maximizing ratio and linear discriminant
- the dimensionality reduction method of the analyzed data due to the problems of low efficiency and low accuracy in the image classification method due to the imperfection of the dimensionality reduction method, the present invention proposes a ground object classification method for hyperspectral images.
- a data dimensionality reduction method based on maximizing ratio and linear discriminant analysis characterized in that the steps are as follows:
- Step 1 construct a data matrix, a label vector and a label matrix according to the image;
- the image is a hyperspectral image, a Chinese herbal medicine image or a face image;
- Step 2 Calculate the intra-class covariance matrix and the inter-class covariance matrix
- Step 3 Construct an optimization problem based on linear discriminant analysis that maximizes the sum of ratios
- Step 4 Solve the projection matrix that maximizes the objective function.
- Step 2 is as follows:
- X and G are the sample matrix and label matrix obtained in step 1, respectively, is a unit matrix of order n, is an n-dimensional all 1-column vector.
- step 4 an alternate iterative optimization algorithm is used to solve the projection matrix
- a method for classifying features of hyperspectral images by adopting the above-mentioned dimensionality reduction method wherein the samples in step 1 are hyperspectral images, and the eigenvalues are grayscale values of a single waveband; n is a single waveband The total number of pixels, c is the total number of pixel ground object categories; perform steps 1-4 in turn to obtain the projection matrix; use the projection matrix to project the data matrix formed by the grayscales of the corresponding pixels in all bands in the acquired hyperspectral image of the unknown label, to obtain Projected sample matrix Z; take each column of Z as all feature sequences of pixels corresponding to the new unknown label, and classify the projected new pixel samples using the K-nearest neighbor classifier that has been trained with the training samples , and finally get the category label of the pixel corresponding to the unknown label feature.
- k 3 of the K-nearest neighbor classifier.
- a data dimensionality reduction method based on maximizing ratio and linear discriminant analysis proposed by the present invention establishes the objective function of the linear discriminant analysis method based on maximizing ratio sum, avoiding the tendency of traditional linear discriminant analysis to select small variance and discriminating ability. For the problem of weak features, it is possible to select features that are more conducive to classification.
- Alternate optimization iterative algorithm is used to solve the optimization problem of linear discriminant analysis of maximizing the ratio sum.
- This algorithm does not rely on the calculation of the inverse matrix of the intra-class covariance matrix, and does not require data preprocessing, which improves the data dimensionality reduction method for the original data. adaptability of traits.
- a method for classifying ground objects of hyperspectral images proposed by the present invention maximizes the sum of the ratios of the inter-class distances and the intra-class distances of all feature dimensions in the projection subspace, which can avoid selecting sample features with small variance during feature extraction , which is beneficial to improve the classification accuracy.
- the alternate iterative optimization method is used to solve the problem of maximizing the sum of ratios.
- the solution process does not involve the matrix inversion step, which avoids the problem that the classification method based on linear discriminant analysis cannot be solved due to the singularity of the intra-class covariance matrix. Therefore, the present invention can better realize dimensionality reduction of high-dimensional data and extract more effective features, thereby reducing the difficulty of storing hyperspectral data, improving data processing speed, extracting more effective features of data, and finally improving the classification accuracy of ground object classification .
- Fig. 1 is a flow chart of the dimensionality reduction method of the present invention.
- Figure 2 is a grayscale image of the actual scene.
- Figure 3 is a graph of the results of the classification accuracy of ground objects.
- the present invention proposes a ground object classification method based on maximizing ratio and linear discriminant analysis of hyperspectral images, comprising the following steps:
- Step 1 Obtain a set of hyperspectral images with a feature dimension of d (that is, the total number of hyperspectral bands is d), and the feature dimension d in the actual ground object dataset used is 103.
- the value of the feature is the gray value of the corresponding pixel in each band.
- the total number of pixels in a single band is n.
- the number of training samples is 2074, and a total of 10 categories of ground object category labels are obtained for all pixels, and then the data matrix, label vector, label matrix, Within-class covariance matrix and between-class covariance matrix. It is mainly divided into the following two processes:
- X and G are the sample matrix and label matrix calculated according to step (1), respectively, is a unit matrix of order n, is an n-dimensional all 1-column vector.
- Step 2 Establish an optimization problem and solve the optimal projection matrix, which is mainly divided into the following two processes:
- m is the final feature dimension of the subspace to be projected
- ⁇ is an adaptive parameter, which needs to be a sufficiently large number to ensure that the algorithm converges, and the value here is Tr( Sw ) ⁇ 10 10 .
- ⁇ 2 is the convergence accuracy, which can be artificially given according to the actual application situation, and is set to 10 -6 here.
- ⁇ 1 is the convergence accuracy, which can be artificially given according to the actual application situation, and is set to 10 -6 here.
- Step 3 Use the same hyperspectral camera to take a hyperspectral image of the area that needs to be classified, and obtain a hyperspectral image whose feature dimension is still d.
- the feature dimension of the image used this time is 103, and the feature value is the gray of a single band.
- the gray value after metricization, the total number of pixels in a single band is n', and the total number of test samples is 8296. The acquisition of the original features of these samples is exactly the same as that of the training data set.
- step 2 Use the projection matrix obtained in step 2 to project the data matrix formed by the gray levels of corresponding pixels in all bands in the acquired hyperspectral image of the unknown label, and obtain the projected sample matrix where each column represents the value of a new set of features for a hyperspectral image pixel of unknown label, the total number of new features is m, that is, the subspace dimension is,
- Baseline is the classification result of directly using the trained K-nearest neighbor classifier by using the original training data
- RSLDA is the classification result of the present invention using the trained K-nearest neighbor classifier after dimensionality reduction of the original data.
- the dimension of the subspace that is, the number of new features is specified from 1 to 60
- the data dimensionality reduction method of the present invention can obtain higher classification accuracy by combining the classifier for classification, and it will not be affected by intra-class coordination during the calculation process.
- the singularity of the variance matrix makes data dimensionality reduction algorithms unavailable.
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Artificial Intelligence (AREA)
- Evolutionary Computation (AREA)
- Data Mining & Analysis (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Software Systems (AREA)
- Medical Informatics (AREA)
- Databases & Information Systems (AREA)
- Computing Systems (AREA)
- Remote Sensing (AREA)
- Bioinformatics & Computational Biology (AREA)
- Evolutionary Biology (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Human Computer Interaction (AREA)
- Astronomy & Astrophysics (AREA)
- Image Analysis (AREA)
Abstract
Description
Claims (6)
- 一种采用权利要求2所述的降维方法的高光谱图像的地物分类方法,其特征在于其中步骤1中的样本为高光谱图像,特征值取单一波段的灰度化之后的灰度值;n为单一波段的像素总数,c为像素地物类别总数;依次进行步骤1-4得到投影矩阵;利用投影矩阵对获取的未知标签的高光谱图像内对应像素在所有波段的灰度构成的数据矩阵进行投影,得到投影后的样本矩阵Z;将Z的每一列作为新的未知标签的地物对应的像素的所有特征序列,将投影后的新的像素样本采用已经用训练样本训练好的K近邻分类器进行分类,最后得到未知标签地物对应的像素的类别标签。
- 根据权利要求5所述的一种高光谱图像的地物分类方法,其特征在于所述的K近邻分类器的k=3。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/997,684 US20240029431A1 (en) | 2021-02-26 | 2021-04-29 | A data dimension reduction method based on maximizing ratio sum for linear discriminant analysis |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110216054.1 | 2021-02-26 | ||
CN202110216054.1A CN112836671B (zh) | 2021-02-26 | 2021-02-26 | 一种基于最大化比率和线性判别分析的数据降维方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022178978A1 true WO2022178978A1 (zh) | 2022-09-01 |
Family
ID=75933718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2021/090835 WO2022178978A1 (zh) | 2021-02-26 | 2021-04-29 | 一种基于最大化比率和线性判别分析的数据降维方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US20240029431A1 (zh) |
CN (1) | CN112836671B (zh) |
WO (1) | WO2022178978A1 (zh) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116126931A (zh) * | 2022-12-08 | 2023-05-16 | 湖北华中电力科技开发有限责任公司 | 一种配电台区用电数据挖掘方法、装置、系统及存储介质 |
CN116347104A (zh) * | 2023-05-22 | 2023-06-27 | 宁波康达凯能医疗科技有限公司 | 基于高效判别分析的帧内图像编码方法、装置及存储介质 |
CN116341396A (zh) * | 2023-05-30 | 2023-06-27 | 青岛理工大学 | 一种基于多源数据融合的复杂装备数字孪生建模方法 |
CN116542956A (zh) * | 2023-05-25 | 2023-08-04 | 广州机智云物联网科技有限公司 | 一种织物组分自动检测方法、系统及可读存储介质 |
CN117493858A (zh) * | 2023-12-29 | 2024-02-02 | 湖北神龙工程测试技术有限公司 | 基于人工智能的基桩完整性识别方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104008394A (zh) * | 2014-05-20 | 2014-08-27 | 西安电子科技大学 | 基于近邻边界最大的半监督高光谱数据降维方法 |
CN108520279A (zh) * | 2018-04-12 | 2018-09-11 | 上海海洋大学 | 一种局部稀疏嵌入的高光谱图像半监督降维方法 |
CN108805061A (zh) * | 2018-05-30 | 2018-11-13 | 西北工业大学 | 基于局部自适应判别分析的高光谱图像分类方法 |
WO2019045147A1 (ko) * | 2017-08-29 | 2019-03-07 | 한밭대학교 산학협력단 | 딥러닝을 pc에 적용하기 위한 메모리 최적화 방법 |
CN111553417A (zh) * | 2020-04-28 | 2020-08-18 | 厦门大学 | 基于判别正则化局部保留投影的图像数据降维方法及系统 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6609093B1 (en) * | 2000-06-01 | 2003-08-19 | International Business Machines Corporation | Methods and apparatus for performing heteroscedastic discriminant analysis in pattern recognition systems |
CN104809475B (zh) * | 2015-05-06 | 2018-05-04 | 西安电子科技大学 | 基于增量线性判别分析的多类标场景分类方法 |
CN107944482B (zh) * | 2017-11-17 | 2021-10-19 | 上海海洋大学 | 一种基于半监督学习的高光谱图像的降维方法 |
CN108845974A (zh) * | 2018-04-24 | 2018-11-20 | 清华大学 | 采用最小最大概率机的分离概率的有监督线性降维方法 |
CN111191700B (zh) * | 2019-12-20 | 2023-04-18 | 长安大学 | 基于自适应协同图判别分析的高光谱图像降维方法及装置 |
CN112116017B (zh) * | 2020-09-25 | 2024-02-13 | 西安电子科技大学 | 基于核保持的图像数据降维方法 |
-
2021
- 2021-02-26 CN CN202110216054.1A patent/CN112836671B/zh active Active
- 2021-04-29 US US17/997,684 patent/US20240029431A1/en active Pending
- 2021-04-29 WO PCT/CN2021/090835 patent/WO2022178978A1/zh active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104008394A (zh) * | 2014-05-20 | 2014-08-27 | 西安电子科技大学 | 基于近邻边界最大的半监督高光谱数据降维方法 |
WO2019045147A1 (ko) * | 2017-08-29 | 2019-03-07 | 한밭대학교 산학협력단 | 딥러닝을 pc에 적용하기 위한 메모리 최적화 방법 |
CN108520279A (zh) * | 2018-04-12 | 2018-09-11 | 上海海洋大学 | 一种局部稀疏嵌入的高光谱图像半监督降维方法 |
CN108805061A (zh) * | 2018-05-30 | 2018-11-13 | 西北工业大学 | 基于局部自适应判别分析的高光谱图像分类方法 |
CN111553417A (zh) * | 2020-04-28 | 2020-08-18 | 厦门大学 | 基于判别正则化局部保留投影的图像数据降维方法及系统 |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116126931A (zh) * | 2022-12-08 | 2023-05-16 | 湖北华中电力科技开发有限责任公司 | 一种配电台区用电数据挖掘方法、装置、系统及存储介质 |
CN116126931B (zh) * | 2022-12-08 | 2024-02-13 | 湖北华中电力科技开发有限责任公司 | 一种配电台区用电数据挖掘方法、装置、系统及存储介质 |
CN116347104A (zh) * | 2023-05-22 | 2023-06-27 | 宁波康达凯能医疗科技有限公司 | 基于高效判别分析的帧内图像编码方法、装置及存储介质 |
CN116347104B (zh) * | 2023-05-22 | 2023-10-17 | 宁波康达凯能医疗科技有限公司 | 基于高效判别分析的帧内图像编码方法、装置及存储介质 |
CN116542956A (zh) * | 2023-05-25 | 2023-08-04 | 广州机智云物联网科技有限公司 | 一种织物组分自动检测方法、系统及可读存储介质 |
CN116542956B (zh) * | 2023-05-25 | 2023-11-17 | 广州机智云物联网科技有限公司 | 一种织物组分自动检测方法、系统及可读存储介质 |
CN116341396A (zh) * | 2023-05-30 | 2023-06-27 | 青岛理工大学 | 一种基于多源数据融合的复杂装备数字孪生建模方法 |
CN116341396B (zh) * | 2023-05-30 | 2023-08-11 | 青岛理工大学 | 一种基于多源数据融合的复杂装备数字孪生建模方法 |
CN117493858A (zh) * | 2023-12-29 | 2024-02-02 | 湖北神龙工程测试技术有限公司 | 基于人工智能的基桩完整性识别方法 |
CN117493858B (zh) * | 2023-12-29 | 2024-03-26 | 湖北神龙工程测试技术有限公司 | 基于人工智能的基桩完整性识别方法 |
Also Published As
Publication number | Publication date |
---|---|
CN112836671A (zh) | 2021-05-25 |
US20240029431A1 (en) | 2024-01-25 |
CN112836671B (zh) | 2024-03-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2022178978A1 (zh) | 一种基于最大化比率和线性判别分析的数据降维方法 | |
Martin et al. | Learning to detect natural image boundaries using brightness and texture | |
Jiang | Asymmetric principal component and discriminant analyses for pattern classification | |
CN111126482B (zh) | 一种基于多分类器级联模型的遥感影像自动分类方法 | |
Li et al. | Overview of principal component analysis algorithm | |
Bekhouche et al. | Pyramid multi-level features for facial demographic estimation | |
CN108647690B (zh) | 基于判别稀疏保持投影的非约束人脸图像降维方法 | |
CN111126240B (zh) | 一种三通道特征融合人脸识别方法 | |
CN104318219A (zh) | 基于局部特征及全局特征结合的人脸识别方法 | |
CN113033398B (zh) | 一种手势识别方法、装置、计算机设备及存储介质 | |
CN109241813B (zh) | 基于判别稀疏保持嵌入的非约束人脸图像降维方法 | |
Jiang | Feature extraction for image recognition and computer vision | |
Gao et al. | A robust geometric mean-based subspace discriminant analysis feature extraction approach for image set classification | |
CN110188646B (zh) | 基于梯度方向直方图与局部二值模式融合的人耳识别方法 | |
CN111325275A (zh) | 基于低秩二维局部鉴别图嵌入的鲁棒图像分类方法及装置 | |
Huang et al. | Asymmetric 3D/2D face recognition based on LBP facial representation and canonical correlation analysis | |
CN103942572A (zh) | 一种基于双向压缩数据空间维度缩减的面部表情特征提取方法和装置 | |
CN110287973B (zh) | 一种基于低秩鲁棒线性鉴别分析的图像特征提取方法 | |
Yuan et al. | Holistic learning-based high-order feature descriptor for smoke recognition | |
Kejun et al. | Automatic nipple detection using cascaded adaboost classifier | |
Yin et al. | Video text localization based on Adaboost | |
Huang et al. | Skew correction of handwritten Chinese character based on ResNet | |
Liu et al. | Gabor feature representation method based on block statistics and its application to facial expression recognition | |
Li et al. | Shadow determination and compensation for face recognition | |
Wang et al. | Feature extraction method of face image texture spectrum based on a deep learning algorithm |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21927411 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 17997684 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21927411 Country of ref document: EP Kind code of ref document: A1 |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 19.02.2024) |