奇异值分解 Resources

Showing items tagged with "奇异值分解"

Application Background Singular Value Decomposition (SVD) is an important matrix factorization method in linear algebra, extending the unitary diagonalization of normal matrices in matrix analysis. It has significant applications in signal processing, statistics, and other fields. SVD shares some similarities with eigenvector-based diagonalization of symmetric or Hermitian matrices, but despite their correlation, these two matrix decompositions have distinct differences. Key Technology A non-negative real number σ is a singular value of matrix M if there exist unit vectors u in Km and v in Kn such that: M = uσv^T where vectors u and v are respectively

MATLAB 439 views Tagged

This program utilizes singular value decomposition (SVD) to compress and decompose 3-channel color images through the following technical steps: Compression Process: 1. Select sub-image size K to decompose the image into M×M sub-images (IMG(s), s=1,2,...,M², where M=N/K, original image size N×N). 2. Calculate average of M² sub-images and subtract mean from each sub-image. 3. Compute correlation matrix R with elements defined by covariance relationships. 4. Calculate eigenvalues/eigenvectors of R, then obtain compressed encoding via dot products between sub-images and principal eigenvectors. Implementation features eigenvalue-based dimension reduction for efficient color channel processing.

MATLAB 264 views Tagged