Feature extraction
Feature extraction is an area of image processing which involves using algorithms to detect and isolate various desired portions of a digitized image or video stream.
Table of contents |
Low-level
- Edge detection
- Scale invariant feature transform
Curvature
- Edge direction, changing intensity, autocorrelation
Image motion
- Area based, differential approach. Optical flow.
Shape Based
Thresholding
Template matching
Hough transform
- Lines
- Circles/Ellipses
- Arbitrary shapes (Generalized Hough Transform)
Flexible methods
- Deformable, parameterized shapes
- Active contours (snakes)
Categories: Computer vision