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 |
Detailed Description
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:
- the class_id field is used to gather lines extracted from different octaves which refer to same line inside original image (such lines and the one they represent in original image share the same class_id value)
- the angle field represents line's slope with respect to (positive) X axis
- the pt field represents line's midpoint
- the response field is computed as the ratio between the line's length and maximum between image's width and height
- the size field is the area of the smallest rectangle containing line
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.
Constructor & Destructor Documentation
◆ KeyLine()
|
inline |
constructor
Member Function Documentation
◆ getEndPoint()
|
inline |
Returns the end point of the line in the original image
◆ getEndPointInOctave()
|
inline |
Returns the end point of the line in the octave it was extracted from
◆ getStartPoint()
|
inline |
Returns the start point of the line in the original image
◆ getStartPointInOctave()
|
inline |
Returns the start point of the line in the octave it was extracted from
Member Data Documentation
◆ angle
| float cv::line_descriptor::KeyLine::angle |
orientation of the line
◆ class_id
| int cv::line_descriptor::KeyLine::class_id |
object ID, that can be used to cluster keylines by the line they represent
◆ endPointX
| float cv::line_descriptor::KeyLine::endPointX |
◆ endPointY
| float cv::line_descriptor::KeyLine::endPointY |
◆ ePointInOctaveX
| float cv::line_descriptor::KeyLine::ePointInOctaveX |
◆ ePointInOctaveY
| float cv::line_descriptor::KeyLine::ePointInOctaveY |
◆ lineLength
| float cv::line_descriptor::KeyLine::lineLength |
the length of line
◆ numOfPixels
| int cv::line_descriptor::KeyLine::numOfPixels |
number of pixels covered by the line
◆ octave
| int cv::line_descriptor::KeyLine::octave |
octave (pyramid layer), from which the keyline has been extracted
◆ pt
| Point2f cv::line_descriptor::KeyLine::pt |
coordinates of the middlepoint
◆ response
| 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
◆ size
| float cv::line_descriptor::KeyLine::size |
minimum area containing line
◆ sPointInOctaveX
| float cv::line_descriptor::KeyLine::sPointInOctaveX |
line's extremes in image it was extracted from
◆ sPointInOctaveY
| float cv::line_descriptor::KeyLine::sPointInOctaveY |
◆ startPointX
| float cv::line_descriptor::KeyLine::startPointX |
lines's extremes in original image
◆ startPointY
| float cv::line_descriptor::KeyLine::startPointY |
The documentation for this struct was generated from the following file:
- opencv2/line_descriptor/descriptor.hpp
