OpenCV  4.1.0
Open Source Computer Vision
Public Member Functions | Public Attributes | List of all members
cv::line_descriptor::LSDParam Struct Reference

#include <opencv2/line_descriptor/descriptor.hpp>

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 onEDL . 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

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

Member Data Documentation

double cv::line_descriptor::LSDParam::ang_th
double cv::line_descriptor::LSDParam::density_th
double cv::line_descriptor::LSDParam::log_eps
int cv::line_descriptor::LSDParam::n_bins
double cv::line_descriptor::LSDParam::quant
double cv::line_descriptor::LSDParam::scale
double cv::line_descriptor::LSDParam::sigma_scale

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