feature Struct Reference

Structure to represent an affine invariant image feature. More...

---

Detailed Description

Structure to represent an affine invariant image feature.

The fields x, y, a, b, c represent the affine region around the feature:

a(x-u)(x-u) + 2b(x-u)(y-v) + c(y-v)(y-v) = 1

Definition at line 44 of file imgfeatures.h.

#include <imgfeatures.h>

List of all members.

Public Attributes
double	x
	x coord
double	y
	y coord
double	a
	Oxford-type affine region parameter.
double	b
	Oxford-type affine region parameter.
double	c
	Oxford-type affine region parameter.
double	scl
	scale of a Lowe-style feature
double	ori
	orientation of a Lowe-style feature
int	d
	descriptor length
double	descr [FEATURE_MAX_D]
	descriptor
int	type
	feature type, OXFD or LOWE
int	klass
	all-purpose feature class
struct feature *	fwd_match
	matching feature from forward image
struct feature *	bck_match
	matching feature from backmward image
struct feature *	mdl_match
	matching feature from model
CvPoint2D64f	img_pt
	location in image
CvPoint2D64f	mdl_pt
	location in model
void *	feature_data
	user-definable data

---

The documentation for this struct was generated from the following file:

• modules/sift/include/sift/imgfeatures.h