Mat.HoughLines Method

MatHoughLines Method

OpenCvSharp Class Library

Finds lines in a binary image using standard Hough transform. The input matrix must be 8-bit, single-channel, binary source image. This image may be modified by the function.

Namespace: OpenCvSharp.CPlusPlus
Assembly: OpenCvSharp.CPlusPlus (in OpenCvSharp.CPlusPlus.dll) Version: 1.0.0.0 (1.0.0.0)

Syntax

C++

Copy

public CvLineSegmentPolar[] HoughLines(
	double rho,
	double theta,
	int threshold,
	double srn = 0,
	double stn = 0
)

Public Function HoughLines ( 
	rho As Double,
	theta As Double,
	threshold As Integer,
	Optional srn As Double = 0,
	Optional stn As Double = 0
) As CvLineSegmentPolar()

public:
array<CvLineSegmentPolar>^ HoughLines(
	double rho, 
	double theta, 
	int threshold, 
	double srn = 0, 
	double stn = 0
)

member HoughLines : 
        rho : float * 
        theta : float * 
        threshold : int * 
        ?srn : float * 
        ?stn : float 
(* Defaults:
        let _srn = defaultArg srn 0
        let _stn = defaultArg stn 0
*)
-> CvLineSegmentPolar[]

Parameters

rho: Type: SystemDouble
Distance resolution of the accumulator in pixels
theta: Type: SystemDouble
Angle resolution of the accumulator in radians
threshold: Type: SystemInt32
The accumulator threshold parameter. Only those lines are returned that get enough votes ( > threshold )
srn (Optional): Type: SystemDouble
For the multi-scale Hough transform it is the divisor for the distance resolution rho. [By default this is 0]
stn (Optional): Type: SystemDouble
For the multi-scale Hough transform it is the divisor for the distance resolution theta. [By default this is 0]

Return Value

Type: CvLineSegmentPolar
The output vector of lines. Each line is represented by a two-element vector (rho, theta) . rho is the distance from the coordinate origin (0,0) (top-left corner of the image) and theta is the line rotation angle in radians

Reference

Mat Class

OpenCvSharp.CPlusPlus Namespace