Line segment detector class [詳解]

#include <imgproc.hpp>

cv::Algorithmを継承しています。

公開メンバ関数
virtual CV_WRAP void	detect (InputArray image, OutputArray lines, OutputArray width=noArray(), OutputArray prec=noArray(), OutputArray nfa=noArray())=0
	Finds lines in the input image. [詳解]

virtual CV_WRAP void	drawSegments (InputOutputArray image, InputArray lines)=0
	Draws the line segments on a given image. [詳解]

virtual CV_WRAP int	compareSegments (const Size &size, InputArray lines1, InputArray lines2, InputOutputArray image=noArray())=0
	Draws two groups of lines in blue and red, counting the non overlapping (mismatching) pixels. [詳解]

基底クラス cv::Algorithm に属する継承公開メンバ関数
virtual CV_WRAP void	clear ()
	Clears the algorithm state [詳解]

virtual void	write (FileStorage &fs) const
	Stores algorithm parameters in a file storage [詳解]

CV_WRAP void	write (const Ptr< FileStorage > &fs, const String &name=String()) const
	simplified API for language bindings これはオーバーロードされたメンバ関数です。利便性のために用意されています。元の関数との違いは引き数のみです。

virtual CV_WRAP void	read (const FileNode &fn)
	Reads algorithm parameters from a file storage [詳解]

virtual CV_WRAP bool	empty () const
	Returns true if the Algorithm is empty (e.g. in the very beginning or after unsuccessful read [詳解]

virtual CV_WRAP void	save (const String &filename) const

virtual CV_WRAP String	getDefaultName () const

その他の継承メンバ
基底クラス cv::Algorithm に属する継承静的公開メンバ関数
template<typename _Tp >
static Ptr< _Tp >	read (const FileNode &fn)
	Reads algorithm from the file node [詳解]

template<typename _Tp >
static Ptr< _Tp >	load (const String &filename, const String &objname=String())
	Loads algorithm from the file [詳解]

template<typename _Tp >
static Ptr< _Tp >	loadFromString (const String &strModel, const String &objname=String())
	Loads algorithm from a String [詳解]

基底クラス cv::Algorithm に属する継承限定公開メンバ関数
void	writeFormat (FileStorage &fs) const

詳解

Line segment detector class

following the algorithm described at [Rafael12] .

関数詳解

virtual CV_WRAP int cv::LineSegmentDetector::compareSegments	(	const Size &	size,
		InputArray	lines1,
		InputArray	lines2,
		InputOutputArray	image = `noArray()`
	)

pure virtual

Draws two groups of lines in blue and red, counting the non overlapping (mismatching) pixels.

引数

size	The size of the image, where lines1 and lines2 were found.
lines1	The first group of lines that needs to be drawn. It is visualized in blue color.
lines2	The second group of lines. They visualized in red color.
image	Optional image, where the lines will be drawn. The image should be color(3-channel) in order for lines1 and lines2 to be drawn in the above mentioned colors.

virtual CV_WRAP void cv::LineSegmentDetector::detect	(	InputArray	image,
		OutputArray	lines,
		OutputArray	width = `noArray()`,
		OutputArray	prec = `noArray()`,
		OutputArray	nfa = `noArray()`
	)

pure virtual

Finds lines in the input image.

This is the output of the default parameters of the algorithm on the above shown image.

引数

image	A grayscale (CV_8UC1) input image. If only a roi needs to be selected, use: `lsd_ptr-\>detect(image(roi), lines, ...); lines += Scalar(roi.x, roi.y, roi.x, roi.y);`
lines	A vector of Vec4i or Vec4f elements specifying the beginning and ending point of a line. Where Vec4i/Vec4f is (x1, y1, x2, y2), point 1 is the start, point 2 - end. Returned lines are strictly oriented depending on the gradient.
width	Vector of widths of the regions, where the lines are found. E.g. Width of line.
prec	Vector of precisions with which the lines are found.
nfa	Vector containing number of false alarms in the line region, with precision of 10%. The bigger the value, logarithmically better the detection. -1 corresponds to 10 mean false alarms 0 corresponds to 1 mean false alarm 1 corresponds to 0.1 mean false alarms This vector will be calculated only when the objects type is LSD_REFINE_ADV.

virtual CV_WRAP void cv::LineSegmentDetector::drawSegments	(	InputOutputArray	image,
		InputArray	lines
	)

pure virtual

Draws the line segments on a given image.

引数

image	The image, where the lines will be drawn. Should be bigger or equal to the image, where the lines were found.
lines	A vector of the lines that needed to be drawn.

このクラス詳解は次のファイルから抽出されました: