org.bytedeco.javacpp

Class opencv_features2d.Feature2D

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.javacpp.opencv_core.Algorithm

org.bytedeco.javacpp.opencv_features2d.Feature2D

All Implemented Interfaces:

AutoCloseable

Direct Known Subclasses:

opencv_features2d.AgastFeatureDetector, opencv_features2d.AKAZE, opencv_features2d.BRISK, opencv_features2d.FastFeatureDetector, opencv_features2d.GFTTDetector, opencv_features2d.KAZE, opencv_features2d.MSER, opencv_features2d.ORB, opencv_features2d.SimpleBlobDetector, opencv_xfeatures2d.BriefDescriptorExtractor, opencv_xfeatures2d.DAISY, opencv_xfeatures2d.FREAK, opencv_xfeatures2d.LATCH, opencv_xfeatures2d.LUCID, opencv_xfeatures2d.MSDDetector, opencv_xfeatures2d.SIFT, opencv_xfeatures2d.StarDetector, opencv_xfeatures2d.SURF

Enclosing class:

opencv_features2d

@Namespace(value="cv")
public static class opencv_features2d.Feature2D
extends opencv_core.Algorithm

\brief Abstract base class for 2D image feature detectors and descriptor extractors

Nested Class Summary

Nested classes/interfaces inherited from class org.bytedeco.javacpp.Pointer

Pointer.CustomDeallocator, Pointer.Deallocator, Pointer.NativeDeallocator

Field Summary

Fields inherited from class org.bytedeco.javacpp.Pointer

address, capacity, limit, position

Constructor Summary

Constructors

Constructor and Description
opencv_features2d.Feature2D() Default native constructor.
opencv_features2d.Feature2D(long size) Native array allocator.
opencv_features2d.Feature2D(Pointer p) Pointer cast constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	compute(opencv_core.Mat image, opencv_core.KeyPointVector keypoints, opencv_core.Mat descriptors) \brief Computes the descriptors for a set of keypoints detected in an image (first variant) or image set (second variant).
void	compute(opencv_core.MatVector images, opencv_core.KeyPointVectorVector keypoints, opencv_core.MatVector descriptors) \overload
int	defaultNorm()
int	descriptorSize()
int	descriptorType()
void	detect(opencv_core.Mat image, opencv_core.KeyPointVector keypoints)
void	detect(opencv_core.Mat image, opencv_core.KeyPointVector keypoints, opencv_core.Mat mask) \brief Detects keypoints in an image (first variant) or image set (second variant).
void	detect(opencv_core.MatVector images, opencv_core.KeyPointVectorVector keypoints)
void	detect(opencv_core.MatVector images, opencv_core.KeyPointVectorVector keypoints, opencv_core.MatVector masks) \overload
void	detectAndCompute(opencv_core.Mat image, opencv_core.Mat mask, opencv_core.KeyPointVector keypoints, opencv_core.Mat descriptors)
void	detectAndCompute(opencv_core.Mat image, opencv_core.Mat mask, opencv_core.KeyPointVector keypoints, opencv_core.Mat descriptors, boolean useProvidedKeypoints) Detects keypoints and computes the descriptors
boolean	empty() Return true if detector object is empty
opencv_features2d.Feature2D	position(long position)

Methods inherited from class org.bytedeco.javacpp.opencv_core.Algorithm

clear, getDefaultName, read, save, save, write

Methods inherited from class org.bytedeco.javacpp.Pointer

address, asBuffer, asByteBuffer, capacity, capacity, close, deallocate, deallocate, deallocateReferences, deallocator, deallocator, equals, fill, hashCode, isNull, limit, limit, maxBytes, memchr, memcmp, memcpy, memmove, memset, offsetof, position, put, setNull, sizeof, toString, totalBytes, withDeallocator, zero

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

opencv_features2d.Feature2D

public opencv_features2d.Feature2D()

Default native constructor.

opencv_features2d.Feature2D

public opencv_features2d.Feature2D(long size)

Native array allocator. Access with Pointer.position(long).

opencv_features2d.Feature2D

public opencv_features2d.Feature2D(Pointer p)

Pointer cast constructor. Invokes Pointer.Pointer(Pointer).

Method Detail

position

public opencv_features2d.Feature2D position(long position)

Overrides:

position in class opencv_core.Algorithm

detect

public void detect(@ByVal
          opencv_core.Mat image,
          @ByRef
          opencv_core.KeyPointVector keypoints,
          @ByVal(nullValue="cv::noArray()")
          opencv_core.Mat mask)

\brief 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.

detect

public void detect(@ByVal
          opencv_core.Mat image,
          @ByRef
          opencv_core.KeyPointVector keypoints)

detect

public void detect(@ByVal
          opencv_core.MatVector images,
          @ByRef
          opencv_core.KeyPointVectorVector keypoints,
          @ByVal(nullValue="cv::noArray()")
          opencv_core.MatVector masks)

\overload

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].

detect

public void detect(@ByVal
          opencv_core.MatVector images,
          @ByRef
          opencv_core.KeyPointVectorVector keypoints)

compute

public void compute(@ByVal
           opencv_core.Mat image,
           @ByRef
           opencv_core.KeyPointVector keypoints,
           @ByVal
           opencv_core.Mat descriptors)

\brief Computes the descriptors for a set of keypoints detected in an image (first variant) or image set (second variant).

Parameters:

image - Image.

keypoints - Input collection of keypoints. Keypoints for which a descriptor cannot be computed are removed. Sometimes new keypoints can be added, for example: SIFT duplicates keypoint with several dominant orientations (for each orientation).

descriptors - Computed descriptors. In the second variant of the method descriptors[i] are descriptors computed for a keypoints[i]. Row j is the keypoints (or keypoints[i]) is the descriptor for keypoint j-th keypoint.

compute

public void compute(@ByVal
           opencv_core.MatVector images,
           @ByRef
           opencv_core.KeyPointVectorVector keypoints,
           @ByVal
           opencv_core.MatVector descriptors)

\overload

Parameters:

images - Image set.

keypoints - Input collection of keypoints. Keypoints for which a descriptor cannot be computed are removed. Sometimes new keypoints can be added, for example: SIFT duplicates keypoint with several dominant orientations (for each orientation).

descriptors - Computed descriptors. In the second variant of the method descriptors[i] are descriptors computed for a keypoints[i]. Row j is the keypoints (or keypoints[i]) is the descriptor for keypoint j-th keypoint.

detectAndCompute

public void detectAndCompute(@ByVal
                    opencv_core.Mat image,
                    @ByVal
                    opencv_core.Mat mask,
                    @ByRef
                    opencv_core.KeyPointVector keypoints,
                    @ByVal
                    opencv_core.Mat descriptors,
                    @Cast(value="bool")
                    boolean useProvidedKeypoints)

Detects keypoints and computes the descriptors

detectAndCompute

public void detectAndCompute(@ByVal
                    opencv_core.Mat image,
                    @ByVal
                    opencv_core.Mat mask,
                    @ByRef
                    opencv_core.KeyPointVector keypoints,
                    @ByVal
                    opencv_core.Mat descriptors)

descriptorSize

public int descriptorSize()

descriptorType

public int descriptorType()

defaultNorm

public int defaultNorm()

empty

@Cast(value="bool")
public boolean empty()

Return true if detector object is empty

Overrides:

empty in class opencv_core.Algorithm