Trait opencv::prelude::FastLineDetector

source · 
pub trait FastLineDetector: AlgorithmTrait + FastLineDetectorConst {
    // Required method
    fn as_raw_mut_FastLineDetector(&mut self) -> *mut c_void;

    // Provided methods
    fn detect(
        &mut self,
        image: &dyn ToInputArray,
        lines: &mut dyn ToOutputArray
    ) -> Result<()> { ... }
    fn draw_segments(
        &mut self,
        image: &mut dyn ToInputOutputArray,
        lines: &dyn ToInputArray,
        draw_arrow: bool,
        linecolor: Scalar,
        linethickness: i32
    ) -> Result<()> { ... }
}
Expand description

@include samples/fld_lines.cpp

Required Methods§

source

fn as_raw_mut_FastLineDetector(&mut self) -> *mut c_void

Provided Methods§

source

fn detect( &mut self, image: &dyn ToInputArray, lines: &mut dyn ToOutputArray ) -> Result<()>

@example fld_lines.cpp An example using the FastLineDetector

Finds lines in the input image. This is the output of the default parameters of the algorithm on the above shown image.

  ![image](https://docs.opencv.org/4.7.0/corridor_fld.jpg)
Parameters
  • image: A grayscale (CV_8UC1) input image. If only a roi needs to be selected, use: fld_ptr-\>detect(image(roi), lines, ...); lines += Scalar(roi.x, roi.y, roi.x, roi.y);
  • lines: A vector of Vec4f elements specifying the beginning and ending point of a line. Where Vec4f is (x1, y1, x2, y2), point 1 is the start, point 2 - end. Returned lines are directed so that the brighter side is on their left.
source

fn draw_segments( &mut self, image: &mut dyn ToInputOutputArray, lines: &dyn ToInputArray, draw_arrow: bool, linecolor: Scalar, linethickness: i32 ) -> Result<()>

Draws the line segments on a given image.

Parameters
  • image: The image, where the lines will be drawn. Should be bigger or equal to the image, where the lines were found.
  • lines: A vector of the lines that needed to be drawn.
  • draw_arrow: If true, arrow heads will be drawn.
  • linecolor: Line color.
  • linethickness: Line thickness.
C++ default parameters
  • draw_arrow: false
  • linecolor: Scalar(0,0,255)
  • linethickness: 1

Implementors§