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OpenCV
4.9.0
Open Source Computer Vision
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A class to represent a line. More...
#include <opencv2/line_descriptor/descriptor.hpp>
Public Member Functions | |
KeyLine () | |
Point2f | getEndPoint () const |
Point2f | getEndPointInOctave () const |
Point2f | getStartPoint () const |
Point2f | getStartPointInOctave () const |
Public Attributes | |
float | angle |
int | class_id |
float | endPointX |
float | endPointY |
float | ePointInOctaveX |
float | ePointInOctaveY |
float | lineLength |
int | numOfPixels |
int | octave |
Point2f | pt |
float | response |
float | size |
float | sPointInOctaveX |
float | sPointInOctaveY |
float | startPointX |
float | startPointY |
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:
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.
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constructor
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Returns the end point of the line in the original image
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Returns the end point of the line in the octave it was extracted from
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Returns the start point of the line in the original image
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Returns the start point of the line in the octave it was extracted from
float cv::line_descriptor::KeyLine::angle |
orientation of the line
int cv::line_descriptor::KeyLine::class_id |
object ID, that can be used to cluster keylines by the line they represent
float cv::line_descriptor::KeyLine::endPointX |
float cv::line_descriptor::KeyLine::endPointY |
float cv::line_descriptor::KeyLine::ePointInOctaveX |
float cv::line_descriptor::KeyLine::ePointInOctaveY |
float cv::line_descriptor::KeyLine::lineLength |
the length of line
int cv::line_descriptor::KeyLine::numOfPixels |
number of pixels covered by the line
int cv::line_descriptor::KeyLine::octave |
octave (pyramid layer), from which the keyline has been extracted
Point2f cv::line_descriptor::KeyLine::pt |
coordinates of the middlepoint
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
float cv::line_descriptor::KeyLine::size |
minimum area containing line
float cv::line_descriptor::KeyLine::sPointInOctaveX |
line's extremes in image it was extracted from
float cv::line_descriptor::KeyLine::sPointInOctaveY |
float cv::line_descriptor::KeyLine::startPointX |
lines's extremes in original image
float cv::line_descriptor::KeyLine::startPointY |