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SNMP -
zolo1226:
第一题解答有问题,式子没看出有什么意义
算法导论上几个简单的习题 -
tmj_159:
看这个跟看乱码没有区别,眼睛疼.
国际C语言混乱代码大赛(IOCCC) -
ibio:
呵呵。强悍,顶!~
求解一个简单的逻辑题 -
breakhearts:
你的第一题和最后一题都有问题,第一题random(0,1)不是 ...
算法导论上几个简单的习题
特征提取完成
目前提取图像区域的颜色纹理特征值包括:
rgbColorFeature RGB颜色空间特征值 RGB颜色分量的均值,标准差,方差,相关系数 12个
hsiColorFeature HSI颜色空间特征值 HSI颜色分量的均值,标准差,方差,相关系数 12个
ntscColorFeature NTSC颜色空间特征值 NTSC颜色分量的均值,标准差,方差,相关系数 12个
gaborFeature gabor变换提取的纹理特征 均值,标准差
特征数量 64=4(频率个数)X8(方向个数)X2(每组提取的纹理特征数量)
CoOcuMatFeature 灰度共生矩阵纹理特征值:'角二阶矩','对比度','相关性','差分矩'
'逆差分矩(均匀性)','和平均值','和方差','和熵','熵','差方差','差熵'
特征数量 176= 16组位置算子 X 每组位置算子提取11个特征
gglcmsFeature 灰度-梯度共生矩阵纹理特征,采用 roberts 算子提取梯度
提取15个特征,分别为:'小梯度优势','大梯度优势','灰度分布不均匀性','梯度分布不均匀性',
'能量','灰度平均','梯度平均','灰度方差','梯度方差','相关','灰度熵','梯度熵','混合熵','惯性','逆差距'
grayDiffStasFeature 灰度差分统计特征值: 对比度,熵,平均值,能量
特征数量 64个=16组位置算子,每组位置算子提取4个特征
grlmFeature 灰度行程长度统计方法
提取特征:'强调短行程的逆差','强调长行程的逆差','灰度不均匀性','行程长度非均匀性','以行程表示的图像分数'
三个方向,共获得15个特征
InvariantFeatures 不变矩特征,三个颜色平面,每个颜色平面提取7个不变矩,共21个特征
九种方法共提取 391 个特征
删除特征类别: Harr-like特征、傅立叶变换特征、以及边缘检测特征
特征提取仍需完成的工作:
1、在最好的情况下,测试每种特征获得的效果,进行比较
2、分析在强分类器中,单个特征/每种特征的贡献率
3、 给定一个图像区域与特征索引,获得对应特征值
4、给定一个图像区、特征方法与特征参数,获得对应特征值
特征提取完成后,进行特征选择
特征选择过程会实现的比较简单,将七八种方法一一实验
后续的主要工作是基于新的样本结与特征集,构建不同类型的级联AdaBoost分类器
当前获得的特征名称如下:
RGB-R-Mean
RGB-G-Mean
RGB-B-Mean
RGB-R-Std
RGB-G-Std
RGB-B-Std
RGB-R-Variance
RGB-G-Variance
RGB-B-Variance
RGB-RG-Correlation
RGB-GB-Correlation
RGB-RB-Correlation
HSI-H-Mean
HSI-S-Mean
HSI-I-Mean
HSI-H-Std
HSI-S-Std
HSI-I-Std
HSI-H-Variance
HSI-S-Variance
HSI-I-Variance
HSI-HS-Correlation
HSI-SI-Correlation
HSI-HI-Correlation
NTSC-Y-Mean
NTSC-I-Mean
NTSC-Q-Mean
NTSC-Y-Std
NTSC-I-Std
NTSC-Q-Std
NTSC-Y-Variance
NTSC-I-Variance
NTSC-Q-Variance
NTSC-YI-Correlation
NTSC-IQ-Correlation
NTSC-YQ-Correlation
GaborTransform-1X0-Mean
GaborTransform-1X0-Std
GaborTransform-1X22.5-Mean
GaborTransform-1X22.5-Std
GaborTransform-1X45-Mean
GaborTransform-1X45-Std
GaborTransform-1X67.5-Mean
GaborTransform-1X67.5-Std
GaborTransform-1X90-Mean
GaborTransform-1X90-Std
GaborTransform-1X112.5-Mean
GaborTransform-1X112.5-Std
GaborTransform-1X135-Mean
GaborTransform-1X135-Std
GaborTransform-1X157.5-Mean
GaborTransform-1X157.5-Std
GaborTransform-2X0-Mean
GaborTransform-2X0-Std
GaborTransform-2X22.5-Mean
GaborTransform-2X22.5-Std
GaborTransform-2X45-Mean
GaborTransform-2X45-Std
GaborTransform-2X67.5-Mean
GaborTransform-2X67.5-Std
GaborTransform-2X90-Mean
GaborTransform-2X90-Std
GaborTransform-2X112.5-Mean
GaborTransform-2X112.5-Std
GaborTransform-2X135-Mean
GaborTransform-2X135-Std
GaborTransform-2X157.5-Mean
GaborTransform-2X157.5-Std
GaborTransform-4X0-Mean
GaborTransform-4X0-Std
GaborTransform-4X22.5-Mean
GaborTransform-4X22.5-Std
GaborTransform-4X45-Mean
GaborTransform-4X45-Std
GaborTransform-4X67.5-Mean
GaborTransform-4X67.5-Std
GaborTransform-4X90-Mean
GaborTransform-4X90-Std
GaborTransform-4X112.5-Mean
GaborTransform-4X112.5-Std
GaborTransform-4X135-Mean
GaborTransform-4X135-Std
GaborTransform-4X157.5-Mean
GaborTransform-4X157.5-Std
GaborTransform-5X0-Mean
GaborTransform-5X0-Std
GaborTransform-5X22.5-Mean
GaborTransform-5X22.5-Std
GaborTransform-5X45-Mean
GaborTransform-5X45-Std
GaborTransform-5X67.5-Mean
GaborTransform-5X67.5-Std
GaborTransform-5X90-Mean
GaborTransform-5X90-Std
GaborTransform-5X112.5-Mean
GaborTransform-5X112.5-Std
GaborTransform-5X135-Mean
GaborTransform-5X135-Std
GaborTransform-5X157.5-Mean
GaborTransform-5X157.5-Std
GrayCoOccurrenctMatrix-0X1-AngularSecondMoment
GrayCoOccurrenctMatrix-0X1-Contrast
GrayCoOccurrenctMatrix-0X1-Correlation
GrayCoOccurrenctMatrix-0X1-DifferenceMoment
GrayCoOccurrenctMatrix-0X1-Homogeneity
GrayCoOccurrenctMatrix-0X1-SumMean
GrayCoOccurrenctMatrix-0X1-SumVariance
GrayCoOccurrenctMatrix-0X1-SumEntropy
GrayCoOccurrenctMatrix-0X1-Entropy
GrayCoOccurrenctMatrix-0X1-DifferenceVariance
GrayCoOccurrenctMatrix-0X1-DifferenceEntropy
GrayCoOccurrenctMatrix-0X5-AngularSecondMoment
GrayCoOccurrenctMatrix-0X5-Contrast
GrayCoOccurrenctMatrix-0X5-Correlation
GrayCoOccurrenctMatrix-0X5-DifferenceMoment
GrayCoOccurrenctMatrix-0X5-Homogeneity
GrayCoOccurrenctMatrix-0X5-SumMean
GrayCoOccurrenctMatrix-0X5-SumVariance
GrayCoOccurrenctMatrix-0X5-SumEntropy
GrayCoOccurrenctMatrix-0X5-Entropy
GrayCoOccurrenctMatrix-0X5-DifferenceVariance
GrayCoOccurrenctMatrix-0X5-DifferenceEntropy
GrayCoOccurrenctMatrix-1X0-AngularSecondMoment
GrayCoOccurrenctMatrix-1X0-Contrast
GrayCoOccurrenctMatrix-1X0-Correlation
GrayCoOccurrenctMatrix-1X0-DifferenceMoment
GrayCoOccurrenctMatrix-1X0-Homogeneity
GrayCoOccurrenctMatrix-1X0-SumMean
GrayCoOccurrenctMatrix-1X0-SumVariance
GrayCoOccurrenctMatrix-1X0-SumEntropy
GrayCoOccurrenctMatrix-1X0-Entropy
GrayCoOccurrenctMatrix-1X0-DifferenceVariance
GrayCoOccurrenctMatrix-1X0-DifferenceEntropy
GrayCoOccurrenctMatrix-5X0-AngularSecondMoment
GrayCoOccurrenctMatrix-5X0-Contrast
GrayCoOccurrenctMatrix-5X0-Correlation
GrayCoOccurrenctMatrix-5X0-DifferenceMoment
GrayCoOccurrenctMatrix-5X0-Homogeneity
GrayCoOccurrenctMatrix-5X0-SumMean
GrayCoOccurrenctMatrix-5X0-SumVariance
GrayCoOccurrenctMatrix-5X0-SumEntropy
GrayCoOccurrenctMatrix-5X0-Entropy
GrayCoOccurrenctMatrix-5X0-DifferenceVariance
GrayCoOccurrenctMatrix-5X0-DifferenceEntropy
GrayCoOccurrenctMatrix-1X1-AngularSecondMoment
GrayCoOccurrenctMatrix-1X1-Contrast
GrayCoOccurrenctMatrix-1X1-Correlation
GrayCoOccurrenctMatrix-1X1-DifferenceMoment
GrayCoOccurrenctMatrix-1X1-Homogeneity
GrayCoOccurrenctMatrix-1X1-SumMean
GrayCoOccurrenctMatrix-1X1-SumVariance
GrayCoOccurrenctMatrix-1X1-SumEntropy
GrayCoOccurrenctMatrix-1X1-Entropy
GrayCoOccurrenctMatrix-1X1-DifferenceVariance
GrayCoOccurrenctMatrix-1X1-DifferenceEntropy
GrayCoOccurrenctMatrix-1X-1-AngularSecondMoment
GrayCoOccurrenctMatrix-1X-1-Contrast
GrayCoOccurrenctMatrix-1X-1-Correlation
GrayCoOccurrenctMatrix-1X-1-DifferenceMoment
GrayCoOccurrenctMatrix-1X-1-Homogeneity
GrayCoOccurrenctMatrix-1X-1-SumMean
GrayCoOccurrenctMatrix-1X-1-SumVariance
GrayCoOccurrenctMatrix-1X-1-SumEntropy
GrayCoOccurrenctMatrix-1X-1-Entropy
GrayCoOccurrenctMatrix-1X-1-DifferenceVariance
GrayCoOccurrenctMatrix-1X-1-DifferenceEntropy
GrayCoOccurrenctMatrix-5X5-AngularSecondMoment
GrayCoOccurrenctMatrix-5X5-Contrast
GrayCoOccurrenctMatrix-5X5-Correlation
GrayCoOccurrenctMatrix-5X5-DifferenceMoment
GrayCoOccurrenctMatrix-5X5-Homogeneity
GrayCoOccurrenctMatrix-5X5-SumMean
GrayCoOccurrenctMatrix-5X5-SumVariance
GrayCoOccurrenctMatrix-5X5-SumEntropy
GrayCoOccurrenctMatrix-5X5-Entropy
GrayCoOccurrenctMatrix-5X5-DifferenceVariance
GrayCoOccurrenctMatrix-5X5-DifferenceEntropy
GrayCoOccurrenctMatrix-5X-5-AngularSecondMoment
GrayCoOccurrenctMatrix-5X-5-Contrast
GrayCoOccurrenctMatrix-5X-5-Correlation
GrayCoOccurrenctMatrix-5X-5-DifferenceMoment
GrayCoOccurrenctMatrix-5X-5-Homogeneity
GrayCoOccurrenctMatrix-5X-5-SumMean
GrayCoOccurrenctMatrix-5X-5-SumVariance
GrayCoOccurrenctMatrix-5X-5-SumEntropy
GrayCoOccurrenctMatrix-5X-5-Entropy
GrayCoOccurrenctMatrix-5X-5-DifferenceVariance
GrayCoOccurrenctMatrix-5X-5-DifferenceEntropy
GrayCoOccurrenctMatrix-2X5-AngularSecondMoment
GrayCoOccurrenctMatrix-2X5-Contrast
GrayCoOccurrenctMatrix-2X5-Correlation
GrayCoOccurrenctMatrix-2X5-DifferenceMoment
GrayCoOccurrenctMatrix-2X5-Homogeneity
GrayCoOccurrenctMatrix-2X5-SumMean
GrayCoOccurrenctMatrix-2X5-SumVariance
GrayCoOccurrenctMatrix-2X5-SumEntropy
GrayCoOccurrenctMatrix-2X5-Entropy
GrayCoOccurrenctMatrix-2X5-DifferenceVariance
GrayCoOccurrenctMatrix-2X5-DifferenceEntropy
GrayCoOccurrenctMatrix-2X-5-AngularSecondMoment
GrayCoOccurrenctMatrix-2X-5-Contrast
GrayCoOccurrenctMatrix-2X-5-Correlation
GrayCoOccurrenctMatrix-2X-5-DifferenceMoment
GrayCoOccurrenctMatrix-2X-5-Homogeneity
GrayCoOccurrenctMatrix-2X-5-SumMean
GrayCoOccurrenctMatrix-2X-5-SumVariance
GrayCoOccurrenctMatrix-2X-5-SumEntropy
GrayCoOccurrenctMatrix-2X-5-Entropy
GrayCoOccurrenctMatrix-2X-5-DifferenceVariance
GrayCoOccurrenctMatrix-2X-5-DifferenceEntropy
GrayCoOccurrenctMatrix-4X5-AngularSecondMoment
GrayCoOccurrenctMatrix-4X5-Contrast
GrayCoOccurrenctMatrix-4X5-Correlation
GrayCoOccurrenctMatrix-4X5-DifferenceMoment
GrayCoOccurrenctMatrix-4X5-Homogeneity
GrayCoOccurrenctMatrix-4X5-SumMean
GrayCoOccurrenctMatrix-4X5-SumVariance
GrayCoOccurrenctMatrix-4X5-SumEntropy
GrayCoOccurrenctMatrix-4X5-Entropy
GrayCoOccurrenctMatrix-4X5-DifferenceVariance
GrayCoOccurrenctMatrix-4X5-DifferenceEntropy
GrayCoOccurrenctMatrix-4X-5-AngularSecondMoment
GrayCoOccurrenctMatrix-4X-5-Contrast
GrayCoOccurrenctMatrix-4X-5-Correlation
GrayCoOccurrenctMatrix-4X-5-DifferenceMoment
GrayCoOccurrenctMatrix-4X-5-Homogeneity
GrayCoOccurrenctMatrix-4X-5-SumMean
GrayCoOccurrenctMatrix-4X-5-SumVariance
GrayCoOccurrenctMatrix-4X-5-SumEntropy
GrayCoOccurrenctMatrix-4X-5-Entropy
GrayCoOccurrenctMatrix-4X-5-DifferenceVariance
GrayCoOccurrenctMatrix-4X-5-DifferenceEntropy
GrayCoOccurrenctMatrix-5X2-AngularSecondMoment
GrayCoOccurrenctMatrix-5X2-Contrast
GrayCoOccurrenctMatrix-5X2-Correlation
GrayCoOccurrenctMatrix-5X2-DifferenceMoment
GrayCoOccurrenctMatrix-5X2-Homogeneity
GrayCoOccurrenctMatrix-5X2-SumMean
GrayCoOccurrenctMatrix-5X2-SumVariance
GrayCoOccurrenctMatrix-5X2-SumEntropy
GrayCoOccurrenctMatrix-5X2-Entropy
GrayCoOccurrenctMatrix-5X2-DifferenceVariance
GrayCoOccurrenctMatrix-5X2-DifferenceEntropy
GrayCoOccurrenctMatrix-5X-2-AngularSecondMoment
GrayCoOccurrenctMatrix-5X-2-Contrast
GrayCoOccurrenctMatrix-5X-2-Correlation
GrayCoOccurrenctMatrix-5X-2-DifferenceMoment
GrayCoOccurrenctMatrix-5X-2-Homogeneity
GrayCoOccurrenctMatrix-5X-2-SumMean
GrayCoOccurrenctMatrix-5X-2-SumVariance
GrayCoOccurrenctMatrix-5X-2-SumEntropy
GrayCoOccurrenctMatrix-5X-2-Entropy
GrayCoOccurrenctMatrix-5X-2-DifferenceVariance
GrayCoOccurrenctMatrix-5X-2-DifferenceEntropy
GrayCoOccurrenctMatrix-5X4-AngularSecondMoment
GrayCoOccurrenctMatrix-5X4-Contrast
GrayCoOccurrenctMatrix-5X4-Correlation
GrayCoOccurrenctMatrix-5X4-DifferenceMoment
GrayCoOccurrenctMatrix-5X4-Homogeneity
GrayCoOccurrenctMatrix-5X4-SumMean
GrayCoOccurrenctMatrix-5X4-SumVariance
GrayCoOccurrenctMatrix-5X4-SumEntropy
GrayCoOccurrenctMatrix-5X4-Entropy
GrayCoOccurrenctMatrix-5X4-DifferenceVariance
GrayCoOccurrenctMatrix-5X4-DifferenceEntropy
GrayCoOccurrenctMatrix-5X-4-AngularSecondMoment
GrayCoOccurrenctMatrix-5X-4-Contrast
GrayCoOccurrenctMatrix-5X-4-Correlation
GrayCoOccurrenctMatrix-5X-4-DifferenceMoment
GrayCoOccurrenctMatrix-5X-4-Homogeneity
GrayCoOccurrenctMatrix-5X-4-SumMean
GrayCoOccurrenctMatrix-5X-4-SumVariance
GrayCoOccurrenctMatrix-5X-4-SumEntropy
GrayCoOccurrenctMatrix-5X-4-Entropy
GrayCoOccurrenctMatrix-5X-4-DifferenceVariance
GrayCoOccurrenctMatrix-5X-4-DifferenceEntropy
GrayGradsCoOccurrenctMatrix-SmallGradsDominance
GrayGradsCoOccurrenctMatrix-BigGradsDominance
GrayGradsCoOccurrenctMatrix-GrayAsymmetry
GrayGradsCoOccurrenctMatrix-GradsAsymmetry
GrayGradsCoOccurrenctMatrix-Energy
GrayGradsCoOccurrenctMatrix-GrayMean
GrayGradsCoOccurrenctMatrix-GradsMean
GrayGradsCoOccurrenctMatrix-GrayVariance
GrayGradsCoOccurrenctMatrix-GradsVariance
GrayGradsCoOccurrenctMatrix-Correlation
GrayGradsCoOccurrenctMatrix-GrayEntropy
GrayGradsCoOccurrenctMatrix-GradsEntropy
GrayGradsCoOccurrenctMatrix-Entropy
GrayGradsCoOccurrenctMatrix-Inertia
GrayGradsCoOccurrenctMatrix-DifferMoment
GrayDifferenceStatistic-0X1-Contrast
GrayDifferenceStatistic-0X1-Entropy
GrayDifferenceStatistic-0X1-Mean
GrayDifferenceStatistic-0X1-Energy
GrayDifferenceStatistic-0X3-Contrast
GrayDifferenceStatistic-0X3-Entropy
GrayDifferenceStatistic-0X3-Mean
GrayDifferenceStatistic-0X3-Energy
GrayDifferenceStatistic-0X5-Contrast
GrayDifferenceStatistic-0X5-Entropy
GrayDifferenceStatistic-0X5-Mean
GrayDifferenceStatistic-0X5-Energy
GrayDifferenceStatistic-1X0-Contrast
GrayDifferenceStatistic-1X0-Entropy
GrayDifferenceStatistic-1X0-Mean
GrayDifferenceStatistic-1X0-Energy
GrayDifferenceStatistic-3X0-Contrast
GrayDifferenceStatistic-3X0-Entropy
GrayDifferenceStatistic-3X0-Mean
GrayDifferenceStatistic-3X0-Energy
GrayDifferenceStatistic-5X0-Contrast
GrayDifferenceStatistic-5X0-Entropy
GrayDifferenceStatistic-5X0-Mean
GrayDifferenceStatistic-5X0-Energy
GrayDifferenceStatistic-1X1-Contrast
GrayDifferenceStatistic-1X1-Entropy
GrayDifferenceStatistic-1X1-Mean
GrayDifferenceStatistic-1X1-Energy
GrayDifferenceStatistic-2X2-Contrast
GrayDifferenceStatistic-2X2-Entropy
GrayDifferenceStatistic-2X2-Mean
GrayDifferenceStatistic-2X2-Energy
GrayDifferenceStatistic-4X4-Contrast
GrayDifferenceStatistic-4X4-Entropy
GrayDifferenceStatistic-4X4-Mean
GrayDifferenceStatistic-4X4-Energy
GrayDifferenceStatistic-5X5-Contrast
GrayDifferenceStatistic-5X5-Entropy
GrayDifferenceStatistic-5X5-Mean
GrayDifferenceStatistic-5X5-Energy
GrayDifferenceStatistic-1X3-Contrast
GrayDifferenceStatistic-1X3-Entropy
GrayDifferenceStatistic-1X3-Mean
GrayDifferenceStatistic-1X3-Energy
GrayDifferenceStatistic-3X1-Contrast
GrayDifferenceStatistic-3X1-Entropy
GrayDifferenceStatistic-3X1-Mean
GrayDifferenceStatistic-3X1-Energy
GrayDifferenceStatistic-2X4-Contrast
GrayDifferenceStatistic-2X4-Entropy
GrayDifferenceStatistic-2X4-Mean
GrayDifferenceStatistic-2X4-Energy
GrayDifferenceStatistic-4X2-Contrast
GrayDifferenceStatistic-4X2-Entropy
GrayDifferenceStatistic-4X2-Mean
GrayDifferenceStatistic-4X2-Energy
GrayDifferenceStatistic-3X5-Contrast
GrayDifferenceStatistic-3X5-Entropy
GrayDifferenceStatistic-3X5-Mean
GrayDifferenceStatistic-3X5-Energy
GrayDifferenceStatistic-5X3-Contrast
GrayDifferenceStatistic-5X3-Entropy
GrayDifferenceStatistic-5X3-Mean
GrayDifferenceStatistic-5X3-Energy
GrayRunLengthStatistic-Orientation:0-ShortDifferMoment
GrayRunLengthStatistic-Orientation:0-LongDifferMoment
GrayRunLengthStatistic-Orientation:0-GrayAsymmetry
GrayRunLengthStatistic-Orientation:0-RunLengthAsymmetry
GrayRunLengthStatistic-Orientation:0-ImageFraction
GrayRunLengthStatistic-Orientation:45-ShortDifferMoment
GrayRunLengthStatistic-Orientation:45-LongDifferMoment
GrayRunLengthStatistic-Orientation:45-GrayAsymmetry
GrayRunLengthStatistic-Orientation:45-RunLengthAsymmetry
GrayRunLengthStatistic-Orientation:45-ImageFraction
GrayRunLengthStatistic-Orientation:90-ShortDifferMoment
GrayRunLengthStatistic-Orientation:90-LongDifferMoment
GrayRunLengthStatistic-Orientation:90-GrayAsymmetry
GrayRunLengthStatistic-Orientation:90-RunLengthAsymmetry
GrayRunLengthStatistic-Orientation:90-ImageFraction
InvariantMoment-R-Space-T1
InvariantMoment-R-Space-T2
InvariantMoment-R-Space-T3
InvariantMoment-R-Space-T4
InvariantMoment-R-Space-T5
InvariantMoment-R-Space-T6
InvariantMoment-R-Space-T7
InvariantMoment-G-Space-T1
InvariantMoment-G-Space-T2
InvariantMoment-G-Space-T3
InvariantMoment-G-Space-T4
InvariantMoment-G-Space-T5
InvariantMoment-G-Space-T6
InvariantMoment-G-Space-T7
InvariantMoment-B-Space-T1
InvariantMoment-B-Space-T2
InvariantMoment-B-Space-T3
InvariantMoment-B-Space-T4
InvariantMoment-B-Space-T5
InvariantMoment-B-Space-T6
InvariantMoment-B-Space-T7
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在特征提取完成后,将两个区域的特征直方图进行级联,形成一个全面的特征向量,用于后续的身份验证阶段。这种级联方法可以确保在考虑整体特征的同时,充分考虑了表情变化的影响。 实验结果显示,该算法在FRETFace ...
在特征提取完成后,通常会采用如 minutiae 对比或局部描述子匹配等方法进行指纹匹配。Minutiae是指纹上的分岔点和结束点,这些特征点在不同指纹之间具有高度的可区分性。通过比较两个指纹的Minutiae点集,可以计算...
Gabor特征提取是一种在计算机视觉和图像处理领域广泛使用的图像特征描述方法,它结合了空间局部性和频率选择性,能够捕获图像中的纹理、边缘和结构信息。MATLAB作为一种强大的数值计算和图形处理环境,是实现Gabor...
特征点提取是计算机视觉领域中的一个关键步骤,它在图像处理、模式识别、机器学习以及计算机辅助设计等众多应用中发挥着重要作用。Moravec算法是由Hans Moravec在1980年提出的,是一种早期的特征点检测方法,主要...
在当前的信号处理领域,特征提取技术是一项核心的技术,其目标是从原始信号中提取出有助于故障诊断、目标检测及识别的特征。本文档所涉及的研究主题是“信号能量特征提取方法研究”,特别关注了如何提取滚动轴承的...
7. **运行结果**:根据描述,这个系统已经完成了特征提取和分类过程,并且有运行结果,这意味着它可以实际应用到心音数据分析中,对心音异常进行自动检测,提高医疗诊断效率。 总结,心音信号特征提取系统是一个...
PCA(主成分分析,Principal Component Analysis)是一种广泛应用的数据分析方法,主要用于高维数据的降维和特征提取。PCA通过对原始数据进行线性变换,找到数据的主要成分,即那些能够最大程度解释数据方差的方向,...
下面将详细介绍如何在MATLAB中实现SIFT特征提取算法,并探讨其工作原理和应用。 SIFT算法主要由以下几个步骤组成: 1. **尺度空间极值检测**:SIFT算法首先在多个尺度上构建高斯差分金字塔,寻找那些在不同尺度上...
RGB特征提取在图像处理和计算机视觉领域中是一个基础且重要的环节。MATLAB作为一个强大的数值计算和数据可视化平台,为用户提供了丰富的工具箱来实现这一功能。在这个“MATLAB的RGB特征提取GUI”项目中,我们将深入...
该函数能够自动完成上述所有步骤,简化了特征提取的过程。例如,以下是一段基本的SIFT特征提取代码: ```matlab % 加载图像 img = imread('your_image.jpg'); % 初始化SIFT特征提取器 siftExtractor = vision....
### 图像处理之特征提取 #### 一、引言 图像处理是计算机视觉领域中的一个核心环节,其目的是通过对原始图像进行分析与处理,提取出有用的特征信息,从而为后续的任务如分类、识别等提供支持。特征提取作为图像...