Rotation invariant textural feature extraction for image retrieval using eigen value analysis of intensity gradients and multi-resolution analysis
Eigen value analysis of gradients for accurate principal texture direction. Rotation invariant feature extraction by aligning the principal texture direction. Independent existence of sub-band features in forming textural feature set. Robust and computationally efficient principal texture detection algorithm. Significant improvement of retrieval performance for anisotropic textures.
principal texture direction content based image retrieval (cbir) discrete wavelet transform (dwt) rotated wavelet filter (rwf) dual tree complex wavelet transform (dt-cwt) dual tree rotated complex wavelet filter (dt-rcwf)