cv::line_descriptor::LSDParam Struct Reference

#include <opencv2/line_descriptor/descriptor.hpp>

Collaboration diagram for cv::line_descriptor::LSDParam:

Public Member Functions
	LSDParam ()

Public Attributes
double	ang_th
double	density_th
double	log_eps
int	n_bins
double	quant
double	scale
double	sigma_scale

Detailed Description

Lines extraction methodology

The lines extraction methodology described in the following is mainly based on [290] . The extraction starts with a Gaussian pyramid generated from an original image, downsampled N-1 times, blurred N times, to obtain N layers (one for each octave), with layer 0 corresponding to input image. Then, from each layer (octave) in the pyramid, lines are extracted using LSD algorithm.

Differently from EDLine lines extractor used in original article, LSD furnishes information only about lines extremes; thus, additional information regarding slope and equation of line are computed via analytic methods. The number of pixels is obtained using LineIterator. Extracted lines are returned in the form of KeyLine objects, but since extraction is based on a method different from the one used in BinaryDescriptor class, data associated to a line's extremes in original image and in octave it was extracted from, coincide. KeyLine's field class_id is used as an index to indicate the order of extraction of a line inside a single octave.

Constructor & Destructor Documentation

LSDParam()

cv::line_descriptor::LSDParam::LSDParam ( )

inline

Member Data Documentation

ang_th

double cv::line_descriptor::LSDParam::ang_th

density_th

double cv::line_descriptor::LSDParam::density_th

log_eps

double cv::line_descriptor::LSDParam::log_eps

n_bins

int cv::line_descriptor::LSDParam::n_bins

quant

double cv::line_descriptor::LSDParam::quant

scale

double cv::line_descriptor::LSDParam::scale

sigma_scale

double cv::line_descriptor::LSDParam::sigma_scale

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The documentation for this struct was generated from the following file:

• opencv2/line_descriptor/descriptor.hpp