OpenCVForUnity.CoreModule.KeyPoint Class Reference

Data structure for salient point detectors. More...

Public Member Functions
	KeyPoint ()
	KeyPoint (float x, float y, float _size)
	KeyPoint (float x, float y, float _size, float _angle)
	KeyPoint (float x, float y, float _size, float _angle, float _response)
	KeyPoint (float x, float y, float _size, float _angle, float _response, int _octave)
	KeyPoint (float x, float y, float _size, float _angle, float _response, int _octave, int _class_id)
	KeyPoint (in Vec7f vals)
	KeyPoint (in(float x, float y, float size, float angle, float response, float octave, float class_id) vals)
bool	Equals (KeyPoint a)
override bool	Equals (Object obj)
override int	GetHashCode ()
override string	ToString ()
float float float float float float float class_id	ToValueTuple ()
Vec7f	ToVec7f ()

Static Public Member Functions
static	operator (float x, float y, float size, float angle, float response, float octave, float class_id)(KeyPoint keypoint)
static	operator KeyPoint (in(float x, float y, float size, float angle, float response, float octave, float class_id) valueTuple)
static	operator Vec7f (KeyPoint keypoint)
static bool	operator!= (KeyPoint a, KeyPoint b)
static bool	operator== (KeyPoint a, KeyPoint b)

Public Attributes
float	angle
float float float float	angle
int	class_id
int	octave
float float float float float float	octave
Point	pt
float	response
float float float float float	response
float	size
float float float	size
float	x
float float	y

Detailed Description

Data structure for salient point detectors.

The class instance stores a keypoint, which is a point feature found by one of many available keypoint detectors, such as Harris corner detector, FAST, StarDetector, SURF, SIFT, etc.

The keypoint is characterized by the 2D position, scale (proportional to the diameter of the neighborhood that needs to be taken into account), orientation, and some other parameters. The keypoint neighborhood is then analyzed by another algorithm that builds a descriptor (usually represented as a feature vector). Keypoints representing the same object in different images can then be matched using KDTree or another method.

C++: cv::KeyPoint Class Reference

See also

https://docs.opencv.org/4.10.0/d2/d29/classcv_1_1KeyPoint.html

Constructor & Destructor Documentation

KeyPoint() [1/8]

OpenCVForUnity.CoreModule.KeyPoint.KeyPoint	(	float	x,
		float	y,
		float	_size,
		float	_angle,
		float	_response,
		int	_octave,
		int	_class_id )

Parameters

x	x-coordinate of the keypoint
y	y-coordinate of the keypoint
_size	keypoint diameter
_angle	keypoint orientation
_response	keypoint detector response on the keypoint (that is, strength of the keypoint)
_octave	pyramid octave in which the keypoint has been detected
_class_id	object id

KeyPoint() [2/8]

OpenCVForUnity.CoreModule.KeyPoint.KeyPoint

(

)

default constructor

KeyPoint() [3/8]

OpenCVForUnity.CoreModule.KeyPoint.KeyPoint	(	float	x,
		float	y,
		float	_size,
		float	_angle,
		float	_response,
		int	_octave )

Parameters

x	x-coordinate of the keypoint
y	y-coordinate of the keypoint
_size	keypoint diameter
_angle	keypoint orientation
_response	keypoint detector response on the keypoint (that is, strength of the keypoint)
_octave	pyramid octave in which the keypoint has been detected

KeyPoint() [4/8]

OpenCVForUnity.CoreModule.KeyPoint.KeyPoint	(	float	x,
		float	y,
		float	_size,
		float	_angle,
		float	_response )

Parameters

x	x-coordinate of the keypoint
y	y-coordinate of the keypoint
_size	keypoint diameter
_angle	keypoint orientation
_response	keypoint detector response on the keypoint (that is, strength of the keypoint)

KeyPoint() [5/8]

OpenCVForUnity.CoreModule.KeyPoint.KeyPoint	(	float	x,
		float	y,
		float	_size,
		float	_angle )

Parameters

x	x-coordinate of the keypoint
y	y-coordinate of the keypoint
_size	keypoint diameter
_angle	keypoint orientation

KeyPoint() [6/8]

OpenCVForUnity.CoreModule.KeyPoint.KeyPoint	(	float	x,
		float	y,
		float	_size )

Parameters

x	x-coordinate of the keypoint
y	y-coordinate of the keypoint
_size	keypoint diameter

KeyPoint() [7/8]

OpenCVForUnity.CoreModule.KeyPoint.KeyPoint

(

in Vec7f

vals

)

Parameters

x	x-coordinate of the keypoint
y	y-coordinate of the keypoint
_size	keypoint diameter
_angle	keypoint orientation
_response	keypoint detector response on the keypoint (that is, strength of the keypoint)
_octave	pyramid octave in which the keypoint has been detected
_class_id	object id

KeyPoint() [8/8]

OpenCVForUnity.CoreModule.KeyPoint.KeyPoint

(

in(float x, float y, float size, float angle, float response, float octave, float class_id)

vals

)

Parameters

x	x-coordinate of the keypoint
y	y-coordinate of the keypoint
_size	keypoint diameter
_angle	keypoint orientation
_response	keypoint detector response on the keypoint (that is, strength of the keypoint)
_octave	pyramid octave in which the keypoint has been detected
_class_id	object id

Member Function Documentation

Equals() [1/2]

bool OpenCVForUnity.CoreModule.KeyPoint.Equals

(

KeyPoint

a

)

Equals() [2/2]

override bool OpenCVForUnity.CoreModule.KeyPoint.Equals

(

Object

obj

)

GetHashCode()

override int OpenCVForUnity.CoreModule.KeyPoint.GetHashCode

(

)

operator()

static OpenCVForUnity.CoreModule.KeyPoint.operator ( float x, float y, float size, float angle, float response, float octave, float class_id )

explicitstatic

operator KeyPoint()

static OpenCVForUnity.CoreModule.KeyPoint.operator KeyPoint ( in(float x, float y, float size, float angle, float response, float octave, float class_id) valueTuple )

explicitstatic

operator Vec7f()

static OpenCVForUnity.CoreModule.KeyPoint.operator Vec7f ( KeyPoint keypoint )

explicitstatic

operator!=()

static bool OpenCVForUnity.CoreModule.KeyPoint.operator!= ( KeyPoint a, KeyPoint b )

static

operator==()

static bool OpenCVForUnity.CoreModule.KeyPoint.operator== ( KeyPoint a, KeyPoint b )

static

ToString()

override string OpenCVForUnity.CoreModule.KeyPoint.ToString

(

)

ToValueTuple()

float float float float float float float class_id OpenCVForUnity.CoreModule.KeyPoint.ToValueTuple

(

)

ToVec7f()

Vec7f OpenCVForUnity.CoreModule.KeyPoint.ToVec7f

(

)

Member Data Documentation

angle [1/2]

float OpenCVForUnity.CoreModule.KeyPoint.angle

Computed orientation of the keypoint (-1 if not applicable).

angle [2/2]

float float float float OpenCVForUnity.CoreModule.KeyPoint.angle

class_id

int OpenCVForUnity.CoreModule.KeyPoint.class_id

Object ID, that can be used to cluster keypoints by an object they belong to.

octave [1/2]

int OpenCVForUnity.CoreModule.KeyPoint.octave

Octave (pyramid layer), from which the keypoint has been extracted.

octave [2/2]

float float float float float float OpenCVForUnity.CoreModule.KeyPoint.octave

pt

Point OpenCVForUnity.CoreModule.KeyPoint.pt

Coordinates of the keypoint.

response [1/2]

float OpenCVForUnity.CoreModule.KeyPoint.response

The response, by which the strongest keypoints have been selected. Can be used for further sorting or subsampling.

response [2/2]

float float float float float OpenCVForUnity.CoreModule.KeyPoint.response

size [1/2]

float OpenCVForUnity.CoreModule.KeyPoint.size

Diameter of the useful keypoint adjacent area.

size [2/2]

float float float OpenCVForUnity.CoreModule.KeyPoint.size

x

float OpenCVForUnity.CoreModule.KeyPoint.x

y

float float OpenCVForUnity.CoreModule.KeyPoint.y

---

The documentation for this class was generated from the following files:

• OpenCVForUnity/Assets/OpenCVForUnity/org/opencv/core/KeyPoint.cs
• OpenCVForUnity/Assets/OpenCVForUnity/org/opencv/core/KeyPoint_Ex.cs