SIFT
1.1.2
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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 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 | |
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