特征值 Resources

Showing items tagged with "特征值"

PCA Implementation Steps: 1. Center the data (mean normalization); 2. Compute the covariance matrix; 3. Calculate eigenvalues and eigenvectors of the covariance matrix; 4. Sort eigenvalues and corresponding eigenvectors; 5. Determine projection direction based on target dimensionality d'; 6. Compute dimensionally reduced data

MATLAB 303 views Tagged

PCA Algorithm Programming Design Steps: 1. Mean Centering 2. Compute Covariance Matrix and its Eigenvalues/Eigenvectors 3. Count Eigenvalues Exceeding Threshold 4. Sort Eigenvalues in Descending Order 5. Remove Small Eigenvalues 6. Remove Large Eigenvalues (Typically Omitted) 7. Combine Selected Eigenvalues 8. Select Corresponding Eigenvalues/Eigenvectors 9. Compute Whitening Matrix 10. Extract Principal Components

MATLAB 251 views Tagged

Implementation of PCA-based face recognition (Eigenface) involving reading 20 training images, computing mean vectors, covariance matrices, eigenvalues and eigenvectors with timing measurements, displaying Eigenfaces in figure(i). Processing 4 test images with reconstruction in feature space, displaying original vs reconstructed images in figure(i) and figure(10+i) respectively. Calculating reconstruction errors for test images with comparative analysis of differences and underlying causes.

MATLAB 233 views Tagged