Feature extraction: Difference between revisions

Revision as of 14:19, 8 June 2003

Revision as of 17:46, 18 January 2004

Line 3:

The following is just a list of subject headings to be filled in later

*Template operations & Fourier Transforms

==Low-level==

LOW-LEVEL

===Edge detection ===

*1st order: Prewitt, Sobel, Canny, Spacek

--

*2nd Order: Laplacian, Marr-Hildreth

1st order: Prewitt, Sobel, Canny, Spacek

2nd Order: Laplacian, Marr-Hildreth

===Curvature===

*Edge direction, changing intensity, autocorrelation

--

Edge direction, changing intensity, autocorrelation

===Image motion===

*Area based, differntialdifferential approach. [[Optical flow]].

--

Area based, differntial approach. Optical flow.

==Shape Based==

SHAPE BASED

===Thresholding===

===Template matching===

===[[Hough transform]]===

*Lines

--

*Circles/Ellipses

Lines

*Arbitrary shapes (Generalized Hough Transform)

Circles/Ellipses

Arbitrary shapes (Generalized Hough Transform)

==Flexible methods==

FLEXIBLE METHODS

*Deformable, parameterized shapes

--

*Active contours (snakes)

Deformable, parameterized shapes

Active contours (snakes)