mirror of
https://github.com/opencv/opencv.git
synced 2024-11-29 05:29:54 +08:00
152 lines
4.5 KiB
ReStructuredText
152 lines
4.5 KiB
ReStructuredText
Features Finding and Images Matching
|
|
====================================
|
|
|
|
.. highlight:: cpp
|
|
|
|
detail::ImageFeatures
|
|
-----------------------
|
|
.. ocv:struct:: detail::ImageFeatures
|
|
|
|
Structure containing image keypoints and descriptors. ::
|
|
|
|
struct CV_EXPORTS ImageFeatures
|
|
{
|
|
int img_idx;
|
|
Size img_size;
|
|
std::vector<KeyPoint> keypoints;
|
|
Mat descriptors;
|
|
};
|
|
|
|
detail::FeaturesFinder
|
|
----------------------
|
|
.. ocv:class:: detail::FeaturesFinder
|
|
|
|
Feature finders base class. ::
|
|
|
|
class CV_EXPORTS FeaturesFinder
|
|
{
|
|
public:
|
|
virtual ~FeaturesFinder() {}
|
|
void operator ()(const Mat &image, ImageFeatures &features);
|
|
void operator ()(const Mat &image, ImageFeatures &features, const std::vector<cv::Rect> &rois);
|
|
virtual void collectGarbage() {}
|
|
|
|
protected:
|
|
virtual void find(const Mat &image, ImageFeatures &features) = 0;
|
|
};
|
|
|
|
detail::SurfFeaturesFinder
|
|
--------------------------
|
|
.. ocv:class:: detail::SurfFeaturesFinder
|
|
|
|
SURF features finder. ::
|
|
|
|
class CV_EXPORTS SurfFeaturesFinder : public FeaturesFinder
|
|
{
|
|
public:
|
|
SurfFeaturesFinder(double hess_thresh = 300., int num_octaves = 3, int num_layers = 4,
|
|
int num_octaves_descr = /*4*/3, int num_layers_descr = /*2*/4);
|
|
|
|
private:
|
|
/* hidden */
|
|
};
|
|
|
|
.. seealso::
|
|
:ocv:class:`detail::FeaturesFinder`
|
|
:ocv:class:`SURF`
|
|
|
|
detail::OrbFeaturesFinder
|
|
-------------------------
|
|
.. ocv:class:: detail::OrbFeaturesFinder
|
|
|
|
ORB features finder. ::
|
|
|
|
class CV_EXPORTS OrbFeaturesFinder : public FeaturesFinder
|
|
{
|
|
public:
|
|
OrbFeaturesFinder(Size _grid_size = Size(3,1), size_t n_features = 1500,
|
|
const ORB::CommonParams &detector_params = ORB::CommonParams(1.3f, 5));
|
|
|
|
private:
|
|
/* hidden */
|
|
};
|
|
|
|
.. seealso::
|
|
:ocv:class:`detail::FeaturesFinder`,
|
|
:ocv:class:`ORB`
|
|
|
|
detail::MatchesInfo
|
|
-------------------
|
|
.. ocv:struct: detail::MatchesInfo
|
|
|
|
Structure containing information about matches between two images. It's assumed that there is a homography between those images. ::
|
|
|
|
struct CV_EXPORTS MatchesInfo
|
|
{
|
|
MatchesInfo();
|
|
MatchesInfo(const MatchesInfo &other);
|
|
const MatchesInfo& operator =(const MatchesInfo &other);
|
|
|
|
int src_img_idx, dst_img_idx; // Images indices (optional)
|
|
std::vector<DMatch> matches;
|
|
std::vector<uchar> inliers_mask; // Geometrically consistent matches mask
|
|
int num_inliers; // Number of geometrically consistent matches
|
|
Mat H; // Estimated homography
|
|
double confidence; // Confidence two images are from the same panorama
|
|
};
|
|
|
|
detail::FeaturesMatcher
|
|
-----------------------
|
|
.. ocv:class:: detail::FeaturesMatcher
|
|
|
|
Feature matchers base class. ::
|
|
|
|
class CV_EXPORTS FeaturesMatcher
|
|
{
|
|
public:
|
|
virtual ~FeaturesMatcher() {}
|
|
|
|
void operator ()(const ImageFeatures &features1, const ImageFeatures &features2,
|
|
MatchesInfo& matches_info) { match(features1, features2, matches_info); }
|
|
|
|
void operator ()(const std::vector<ImageFeatures> &features, std::vector<MatchesInfo> &pairwise_matches,
|
|
const cv::Mat &mask = cv::Mat());
|
|
|
|
bool isThreadSafe() const { return is_thread_safe_; }
|
|
|
|
virtual void collectGarbage() {}
|
|
|
|
protected:
|
|
FeaturesMatcher(bool is_thread_safe = false) : is_thread_safe_(is_thread_safe) {}
|
|
|
|
virtual void match(const ImageFeatures &features1, const ImageFeatures &features2,
|
|
MatchesInfo& matches_info) = 0;
|
|
|
|
bool is_thread_safe_;
|
|
};
|
|
|
|
detail::BestOf2NearestMatcher
|
|
-----------------------------
|
|
.. ocv:class:: detail::BestOf2NearestMatcher
|
|
|
|
Features matcher which finds two best matches for each feature and leaves the best one only if the ratio between descriptor distances is greater than the threshold ``match_conf``. ::
|
|
|
|
class CV_EXPORTS BestOf2NearestMatcher : public FeaturesMatcher
|
|
{
|
|
public:
|
|
BestOf2NearestMatcher(bool try_use_gpu = false, float match_conf = 0.65f,
|
|
int num_matches_thresh1 = 6, int num_matches_thresh2 = 6);
|
|
|
|
void collectGarbage();
|
|
|
|
protected:
|
|
void match(const ImageFeatures &features1, const ImageFeatures &features2, MatchesInfo &matches_info);
|
|
|
|
int num_matches_thresh1_;
|
|
int num_matches_thresh2_;
|
|
Ptr<FeaturesMatcher> impl_;
|
|
};
|
|
|
|
.. seealso:: :ocv:class:`detail::FeaturesMatcher`
|
|
|