Keyphrases
- scale invariant
- feature extraction
- feature transformation
- keypoints
- scale invariant features
- scale invariance
- scale space
- affine invariant
- local binary pattern
- natural images
- translation and scale invariant
- face recognition
- preprocessing
- multiscale
- texture analysis
- image structure
- rotation invariant
- interest point detectors
- image processing
- texture features
- principal component analysis
- feature vectors
- invariant features
- defect detection
- gaussian derivatives
- pattern recognition