SIFT  1.1.2
Data Fields
feature Struct Reference

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

#include <imgfeatures.h>

Data Fields

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 category
 all-purpose feature category
 
struct featurefwd_match
 matching feature from forward image
 
struct featurebck_match
 matching feature from backmward image
 
struct featuremdl_match
 matching feature from model
 
CvPoint2D64f img_pt
 location in image
 
CvPoint2D64f mdl_pt
 location in model
 
void * feature_data
 user-definable data
 

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


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