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org.opencv.features2d
Class FeatureDetector

java.lang.Object
 extended by org.opencv.features2d.FeatureDetector

public class FeatureDetector
extends java.lang.Object

Abstract base class for 2D image feature detectors.

class CV_EXPORTS FeatureDetector

// C++ code:

public:

virtual ~FeatureDetector();

void detect(const Mat& image, vector& keypoints,

const Mat& mask=Mat()) const;

void detect(const vector& images,

vector>& keypoints,

const vector& masks=vector()) const;

virtual void read(const FileNode&);

virtual void write(FileStorage&) const;

static Ptr create(const string& detectorType);

protected:...

};

See Also:
org.opencv.features2d.FeatureDetector : public Algorithm

Field Summary
static int BRISK
static int DENSE
static int DYNAMIC_BRISK
static int DYNAMIC_DENSE
static int DYNAMIC_FAST
static int DYNAMIC_GFTT
static int DYNAMIC_HARRIS
static int DYNAMIC_MSER
static int DYNAMIC_ORB
static int DYNAMIC_SIFT
static int DYNAMIC_SIMPLEBLOB
static int DYNAMIC_STAR
static int DYNAMIC_SURF
static int FAST
static int GFTT
static int GRID_BRISK
static int GRID_DENSE
static int GRID_FAST
static int GRID_GFTT
static int GRID_HARRIS
static int GRID_MSER
static int GRID_ORB
static int GRID_SIFT
static int GRID_SIMPLEBLOB
static int GRID_STAR
static int GRID_SURF
static int GRIDRETECTOR
static int HARRIS
static int MSER
static int ORB
static int PYRAMID_BRISK
static int PYRAMID_DENSE
static int PYRAMID_FAST
static int PYRAMID_GFTT
static int PYRAMID_HARRIS
static int PYRAMID_MSER
static int PYRAMID_ORB
static int PYRAMID_SIFT
static int PYRAMID_SIMPLEBLOB
static int PYRAMID_STAR
static int PYRAMID_SURF
static int SIFT
static int SIMPLEBLOB
static int STAR
static int SURF
Method Summary
static FeatureDetector create(int detectorType)
Creates a feature detector by its name.
void detect(java.util.List<Mat> images, java.util.List<MatOfKeyPoint> keypoints)
Detects keypoints in an image (first variant) or image set (second variant).
void detect(java.util.List<Mat> images, java.util.List<MatOfKeyPoint> keypoints, java.util.List<Mat> masks)
Detects keypoints in an image (first variant) or image set (second variant).
void detect(Mat image, MatOfKeyPoint keypoints)
Detects keypoints in an image (first variant) or image set (second variant).
void detect(Mat image, MatOfKeyPoint keypoints, Mat mask)
Detects keypoints in an image (first variant) or image set (second variant).
boolean empty()
void read(java.lang.String fileName)
void write(java.lang.String fileName)
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

BRISK

public static final int BRISK
See Also:
Constant Field Values

DENSE

public static final int DENSE
See Also:
Constant Field Values

DYNAMIC_BRISK

public static final int DYNAMIC_BRISK
See Also:
Constant Field Values

DYNAMIC_DENSE

public static final int DYNAMIC_DENSE
See Also:
Constant Field Values

DYNAMIC_FAST

public static final int DYNAMIC_FAST
See Also:
Constant Field Values

DYNAMIC_GFTT

public static final int DYNAMIC_GFTT
See Also:
Constant Field Values

DYNAMIC_HARRIS

public static final int DYNAMIC_HARRIS
See Also:
Constant Field Values

DYNAMIC_MSER

public static final int DYNAMIC_MSER
See Also:
Constant Field Values

DYNAMIC_ORB

public static final int DYNAMIC_ORB
See Also:
Constant Field Values

DYNAMIC_SIFT

public static final int DYNAMIC_SIFT
See Also:
Constant Field Values

DYNAMIC_SIMPLEBLOB

public static final int DYNAMIC_SIMPLEBLOB
See Also:
Constant Field Values

DYNAMIC_STAR

public static final int DYNAMIC_STAR
See Also:
Constant Field Values

DYNAMIC_SURF

public static final int DYNAMIC_SURF
See Also:
Constant Field Values

FAST

public static final int FAST
See Also:
Constant Field Values

GFTT

public static final int GFTT
See Also:
Constant Field Values

GRID_BRISK

public static final int GRID_BRISK
See Also:
Constant Field Values

GRID_DENSE

public static final int GRID_DENSE
See Also:
Constant Field Values

GRID_FAST

public static final int GRID_FAST
See Also:
Constant Field Values

GRID_GFTT

public static final int GRID_GFTT
See Also:
Constant Field Values

GRID_HARRIS

public static final int GRID_HARRIS
See Also:
Constant Field Values

GRID_MSER

public static final int GRID_MSER
See Also:
Constant Field Values

GRID_ORB

public static final int GRID_ORB
See Also:
Constant Field Values

GRID_SIFT

public static final int GRID_SIFT
See Also:
Constant Field Values

GRID_SIMPLEBLOB

public static final int GRID_SIMPLEBLOB
See Also:
Constant Field Values

GRID_STAR

public static final int GRID_STAR
See Also:
Constant Field Values

GRID_SURF

public static final int GRID_SURF
See Also:
Constant Field Values

GRIDRETECTOR

public static final int GRIDRETECTOR
See Also:
Constant Field Values

HARRIS

public static final int HARRIS
See Also:
Constant Field Values

MSER

public static final int MSER
See Also:
Constant Field Values

ORB

public static final int ORB
See Also:
Constant Field Values

PYRAMID_BRISK

public static final int PYRAMID_BRISK
See Also:
Constant Field Values

PYRAMID_DENSE

public static final int PYRAMID_DENSE
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Constant Field Values

PYRAMID_FAST

public static final int PYRAMID_FAST
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Constant Field Values

PYRAMID_GFTT

public static final int PYRAMID_GFTT
See Also:
Constant Field Values

PYRAMID_HARRIS

public static final int PYRAMID_HARRIS
See Also:
Constant Field Values

PYRAMID_MSER

public static final int PYRAMID_MSER
See Also:
Constant Field Values

PYRAMID_ORB

public static final int PYRAMID_ORB
See Also:
Constant Field Values

PYRAMID_SIFT

public static final int PYRAMID_SIFT
See Also:
Constant Field Values

PYRAMID_SIMPLEBLOB

public static final int PYRAMID_SIMPLEBLOB
See Also:
Constant Field Values

PYRAMID_STAR

public static final int PYRAMID_STAR
See Also:
Constant Field Values

PYRAMID_SURF

public static final int PYRAMID_SURF
See Also:
Constant Field Values

SIFT

public static final int SIFT
See Also:
Constant Field Values

SIMPLEBLOB

public static final int SIMPLEBLOB
See Also:
Constant Field Values

STAR

public static final int STAR
See Also:
Constant Field Values

SURF

public static final int SURF
See Also:
Constant Field Values
Method Detail

create

public static FeatureDetector create(int detectorType)

Creates a feature detector by its name.

The following detector types are supported:

  • "FAST" -- "FastFeatureDetector"
  • "STAR" -- "StarFeatureDetector"
  • "SIFT" -- "SIFT" (nonfree module)
  • "SURF" -- "SURF" (nonfree module)
  • "ORB" -- "ORB"
  • "BRISK" -- "BRISK"
  • "MSER" -- "MSER"
  • "GFTT" -- "GoodFeaturesToTrackDetector"
  • "HARRIS" -- "GoodFeaturesToTrackDetector" with Harris detector enabled
  • "Dense" -- "DenseFeatureDetector"
  • "SimpleBlob" -- "SimpleBlobDetector"

Also a combined format is supported: feature detector adapter name ("Grid" -- "GridAdaptedFeatureDetector", "Pyramid" -- "PyramidAdaptedFeatureDetector") + feature detector name (see above), for example: "GridFAST", "PyramidSTAR".

Parameters:
detectorType - Feature detector type.
See Also:
org.opencv.features2d.FeatureDetector.create

detect

public void detect(java.util.List<Mat> images,
 java.util.List<MatOfKeyPoint> keypoints)

Detects keypoints in an image (first variant) or image set (second variant).

Parameters:
images - Image set.
keypoints - The detected keypoints. In the second variant of the method keypoints[i] is a set of keypoints detected in images[i].
See Also:
org.opencv.features2d.FeatureDetector.detect

detect

public void detect(java.util.List<Mat> images,
 java.util.List<MatOfKeyPoint> keypoints,
 java.util.List<Mat> masks)

Detects keypoints in an image (first variant) or image set (second variant).

Parameters:
images - Image set.
keypoints - The detected keypoints. In the second variant of the method keypoints[i] is a set of keypoints detected in images[i].
masks - Masks for each input image specifying where to look for keypoints (optional). masks[i] is a mask for images[i].
See Also:
org.opencv.features2d.FeatureDetector.detect

detect

public void detect(Mat image,
 MatOfKeyPoint keypoints)

Detects keypoints in an image (first variant) or image set (second variant).

Parameters:
image - Image.
keypoints - The detected keypoints. In the second variant of the method keypoints[i] is a set of keypoints detected in images[i].
See Also:
org.opencv.features2d.FeatureDetector.detect

detect

public void detect(Mat image,
 MatOfKeyPoint keypoints,
 Mat mask)

Detects keypoints in an image (first variant) or image set (second variant).

Parameters:
image - Image.
keypoints - The detected keypoints. In the second variant of the method keypoints[i] is a set of keypoints detected in images[i].
mask - Mask specifying where to look for keypoints (optional). It must be a 8-bit integer matrix with non-zero values in the region of interest.
See Also:
org.opencv.features2d.FeatureDetector.detect

empty

public boolean empty()

read

public void read(java.lang.String fileName)

write

public void write(java.lang.String fileName)
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