cv::line_descriptor::KeyLine 構造体

A class to represent a line [詳解]

#include <descriptor.hpp>

公開メンバ関数
CV_WRAP Point2f	getStartPoint () const
CV_WRAP Point2f	getEndPoint () const
CV_WRAP Point2f	getStartPointInOctave () const
CV_WRAP Point2f	getEndPointInOctave () const
CV_WRAP	KeyLine ()

公開変数類
CV_PROP_RW float	angle
CV_PROP_RW int	class_id
CV_PROP_RW int	octave
CV_PROP_RW Point2f	pt
CV_PROP_RW float	response
CV_PROP_RW float	size
CV_PROP_RW float	startPointX
CV_PROP_RW float	startPointY
CV_PROP_RW float	endPointX
CV_PROP_RW float	endPointY
CV_PROP_RW float	sPointInOctaveX
CV_PROP_RW float	sPointInOctaveY
CV_PROP_RW float	ePointInOctaveX
CV_PROP_RW float	ePointInOctaveY
CV_PROP_RW float	lineLength
CV_PROP_RW int	numOfPixels

詳解

A class to represent a line

As aformentioned, it is been necessary to design a class that fully stores the information needed to characterize completely a line and plot it on image it was extracted from, when required.

KeyLine* class has been created for such goal; it is mainly inspired to Feature2d's KeyPoint class, since KeyLine shares some of KeyPoint's fields, even if a part of them assumes a different meaning, when speaking about lines. In particular:

• the class_id field is used to gather lines extracted from different octaves which refer to same line inside original image (such lines and the one they represent in original image share the same class_id value)
• the angle field represents line's slope with respect to (positive) X axis
• the pt field represents line's midpoint
• the response field is computed as the ratio between the line's length and maximum between image's width and height
• the size field is the area of the smallest rectangle containing line

Apart from fields inspired to KeyPoint class, KeyLines stores information about extremes of line in original image and in octave it was extracted from, about line's length and number of pixels it covers.

構築子と解体子

KeyLine()

CV_WRAP cv::line_descriptor::KeyLine::KeyLine ( )

inline

constructor

関数詳解

getEndPoint()

CV_WRAP Point2f cv::line_descriptor::KeyLine::getEndPoint ( ) const

inline

Returns the end point of the line in the original image

getEndPointInOctave()

CV_WRAP Point2f cv::line_descriptor::KeyLine::getEndPointInOctave ( ) const

inline

Returns the end point of the line in the octave it was extracted from

getStartPoint()

CV_WRAP Point2f cv::line_descriptor::KeyLine::getStartPoint ( ) const

inline

Returns the start point of the line in the original image

getStartPointInOctave()

CV_WRAP Point2f cv::line_descriptor::KeyLine::getStartPointInOctave ( ) const

inline

Returns the start point of the line in the octave it was extracted from

メンバ詳解

angle

CV_PROP_RW float cv::line_descriptor::KeyLine::angle

orientation of the line

class_id

CV_PROP_RW int cv::line_descriptor::KeyLine::class_id

object ID, that can be used to cluster keylines by the line they represent

lineLength

CV_PROP_RW float cv::line_descriptor::KeyLine::lineLength

the length of line

numOfPixels

CV_PROP_RW int cv::line_descriptor::KeyLine::numOfPixels

number of pixels covered by the line

octave

CV_PROP_RW int cv::line_descriptor::KeyLine::octave

octave (pyramid layer), from which the keyline has been extracted

pt

CV_PROP_RW Point2f cv::line_descriptor::KeyLine::pt

coordinates of the middlepoint

response

CV_PROP_RW float cv::line_descriptor::KeyLine::response

the response, by which the strongest keylines have been selected. It's represented by the ratio between line's length and maximum between image's width and height

size

CV_PROP_RW float cv::line_descriptor::KeyLine::size

minimum area containing line

sPointInOctaveX

CV_PROP_RW float cv::line_descriptor::KeyLine::sPointInOctaveX

line's extremes in image it was extracted from

startPointX

CV_PROP_RW float cv::line_descriptor::KeyLine::startPointX

lines's extremes in original image

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この構造体詳解は次のファイルから抽出されました:

• line_descriptor/descriptor.hpp