firevision::SiftClassifier Class Reference

SIFT classifier. More...

#include <classifiers/sift.h>

Inheritance diagram for firevision::SiftClassifier:

[legend]
List of all members.

Public Member Functions

 SiftClassifier (const char *features_file, unsigned int pixel_width, unsigned int pixel_height, int kdtree_bbf_max_nn_chks=200, float nn_sq_dist_ratio_thr=0.49, int flags=0)
 Constructor.
virtual ~SiftClassifier ()
 Destructor.
virtual std::list< ROI > * classify ()
 Classify image.

Detailed Description

SIFT classifier.

This class provides a classifier that uses OpenCV to detect objects in a given image by matching features using SIFT. The objects are reported back as regions of interest. Each ROI contains an object.

This code is based on the sift package provided by Rob Hess. at http://web.engr.oregonstate.edu/~hess/

Author:
Stefan Schiffer

Definition at line 48 of file sift.h.


Constructor & Destructor Documentation

firevision::SiftClassifier::SiftClassifier ( const char *  object_file,
unsigned int  pixel_width,
unsigned int  pixel_height,
int  kdtree_bbf_max_nn_chks = 200,
float  nn_sq_dist_ratio_thr = 0.49,
int  flags = 0 
)

Constructor.

Parameters:
object_file file that contains the object to detect
pixel_width width of images that will be processed
pixel_height height of images that will be processed
kdtree_bbf_max_nn_chks maximum number of keypoint NN candidates to check during BBF search
nn_sq_dist_ratio_thr threshold on squared ratio of distances between NN and 2nd NN
flags flags, not used yet.

Definition at line 78 of file sift.cpp.

References fawkes::TimeTracker::add_class(), fawkes::TimeTracker::ping_end(), and fawkes::TimeTracker::ping_start().

firevision::SiftClassifier::~SiftClassifier (  )  [virtual]

Destructor.

Definition at line 131 of file sift.cpp.


Member Function Documentation

std::list< ROI > * firevision::SiftClassifier::classify (  )  [virtual]

Classify image.

The current buffer is processed and scanned for the features the classifier has been written and initialized for. It returns a list of disjunct regions of interest.

Returns:
disjunct list of extracted regions of interest

Implements firevision::Classifier.

Definition at line 140 of file sift.cpp.

References firevision::Classifier::_height, firevision::Classifier::_src, firevision::Classifier::_width, firevision::BGR, firevision::convert(), fawkes::TimeTracker::ping_end(), fawkes::TimeTracker::ping_start(), fawkes::TimeTracker::print_to_stdout(), and firevision::YUV422_PLANAR.


The documentation for this class was generated from the following files:
Generated on Tue Feb 22 13:31:43 2011 for Fawkes API by  doxygen 1.4.7