Package org.opencv.xfeatures2d

Class BoostDesc

java.lang.Object

org.opencv.core.Algorithm

org.opencv.features.Feature2D

org.opencv.xfeatures2d.BoostDesc

public class BoostDesc
extends Feature2D

Class implementing BoostDesc (Learning Image Descriptors with Boosting), described in CITE: Trzcinski13a and CITE: Trzcinski13b. desc type of descriptor to use, BoostDesc::BINBOOST_256 is default (256 bit long dimension) Available types are: BoostDesc::BGM, BoostDesc::BGM_HARD, BoostDesc::BGM_BILINEAR, BoostDesc::LBGM, BoostDesc::BINBOOST_64, BoostDesc::BINBOOST_128, BoostDesc::BINBOOST_256 use_orientation sample patterns using keypoints orientation, enabled by default scale_factor adjust the sampling window of detected keypoints 6.25f is default and fits for KAZE, SURF detected keypoints window ratio 6.75f should be the scale for SIFT detected keypoints window ratio 5.00f should be the scale for AKAZE, MSD, AGAST, FAST, BRISK keypoints window ratio 0.75f should be the scale for ORB keypoints ratio 1.50f was the default in original implementation Note: BGM is the base descriptor where each binary dimension is computed as the output of a single weak learner. BGM_HARD and BGM_BILINEAR refers to same BGM but use different type of gradient binning. In the BGM_HARD that use ASSIGN_HARD binning type the gradient is assigned to the nearest orientation bin. In the BGM_BILINEAR that use ASSIGN_BILINEAR binning type the gradient is assigned to the two neighbouring bins. In the BGM and all other modes that use ASSIGN_SOFT binning type the gradient is assigned to 8 nearest bins according to the cosine value between the gradient angle and the bin center. LBGM (alias FP-Boost) is the floating point extension where each dimension is computed as a linear combination of the weak learner responses. BINBOOST and subvariants are the binary extensions of LBGM where each bit is computed as a thresholded linear combination of a set of weak learners. BoostDesc header files (boostdesc_*.i) was exported from original binaries with export-boostdesc.py script from samples subfolder.

Field Summary

Fields inherited from class org.opencv.core.Algorithm

nativeObj

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	BoostDesc(long addr)

Method Summary

Modifier and Type	Method	Description
static BoostDesc	__fromPtr__(long addr)
static BoostDesc	create()
static BoostDesc	create(int desc)
static BoostDesc	create(int desc, boolean use_scale_orientation)
static BoostDesc	create(int desc, boolean use_scale_orientation, float scale_factor)
protected void	finalize()
java.lang.String	getDefaultName()	Returns the algorithm string identifier.
float	getScaleFactor()
boolean	getUseScaleOrientation()
void	setScaleFactor(float scale_factor)
void	setUseScaleOrientation(boolean use_scale_orientation)

Methods inherited from class org.opencv.features.Feature2D

compute, compute, defaultNorm, descriptorSize, descriptorType, detect, detect, detect, detect, detectAndCompute, detectAndCompute, empty, read, write

Methods inherited from class org.opencv.core.Algorithm

clear, getNativeObjAddr, save

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BoostDesc

protected BoostDesc(long addr)

Method Detail

__fromPtr__

public static BoostDesc __fromPtr__(long addr)

create

public static BoostDesc create(int desc,
                               boolean use_scale_orientation,
                               float scale_factor)

create

public static BoostDesc create(int desc,
                               boolean use_scale_orientation)

create

public static BoostDesc create(int desc)

create

public static BoostDesc create()

getDefaultName

public java.lang.String getDefaultName()

Description copied from class: Algorithm

Returns the algorithm string identifier. This string is used as top level xml/yml node tag when the object is saved to a file or string.

Overrides:

getDefaultName in class Feature2D

Returns:

automatically generated

setUseScaleOrientation

public void setUseScaleOrientation(boolean use_scale_orientation)

getUseScaleOrientation

public boolean getUseScaleOrientation()

setScaleFactor

public void setScaleFactor(float scale_factor)

getScaleFactor

public float getScaleFactor()

finalize

protected void finalize()
                 throws java.lang.Throwable

Overrides:

finalize in class Feature2D

Throws:

java.lang.Throwable