Method Detect

Namespace

OpenCvSharp

Assembly

OpenCvSharp.dll

Detect(InputArray, OutputArray, OutputArray, OutputArray, OutputArray)

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

public virtual void Detect(InputArray image, OutputArray lines, OutputArray width = default, OutputArray prec = default, OutputArray nfa = default)

Parameters

image InputArray

A grayscale (CV_8UC1) input image.

lines OutputArray

A vector of Vec4i or Vec4f elements specifying the beginning and ending point of a line. Where Vec4i/Vec4f is (x1, y1, x2, y2), point 1 is the start, point 2 - end. Returned lines are strictly oriented depending on the gradient.

width OutputArray

Vector of widths of the regions, where the lines are found. E.g. Width of line.

prec OutputArray

Vector of precisions with which the lines are found.

nfa OutputArray

Vector containing number of false alarms in the line region, with precision of 10%. The bigger the value, logarithmically better the detection.

Detect(InputArray, out Vec4f[], out double[], out double[], out double[])

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

public virtual void Detect(InputArray image, out Vec4f[] lines, out double[] width, out double[] prec, out double[] nfa)

Parameters

image InputArray

A grayscale (CV_8UC1) input image.

lines Vec4f[]

A vector of Vec4i or Vec4f elements specifying the beginning and ending point of a line. Where Vec4i/Vec4f is (x1, y1, x2, y2), point 1 is the start, point 2 - end. Returned lines are strictly oriented depending on the gradient.

width double[]

Vector of widths of the regions, where the lines are found. E.g. Width of line.

prec double[]

Vector of precisions with which the lines are found.

nfa double[]

Vector containing number of false alarms in the line region, with precision of 10%. The bigger the value, logarithmically better the detection.