@spec clear(Keyword.t()) :: any() | {:error, String.t()}

@spec clear(t()) :: t() | {:error, String.t()}

Clears the algorithm state

Positional Arguments

• self: Evision.LineDescriptor.LSDDetector.t()

Python prototype (for reference only):

clear() -> None

@spec createLSDDetector() :: t() | {:error, String.t()}

Creates ad LSDDetector object, using smart pointers.

Return

• retval: Evision.LineDescriptor.LSDDetector.t()

Python prototype (for reference only):

createLSDDetector() -> retval

@spec createLSDDetectorWithParams(Keyword.t()) :: any() | {:error, String.t()}

@spec createLSDDetectorWithParams(Evision.LineDescriptor.LSDParam.t()) ::
  t() | {:error, String.t()}

createLSDDetectorWithParams

Positional Arguments

• params: Evision.LineDescriptor.LSDParam

Return

• retval: Evision.LineDescriptor.LSDDetector.t()

Python prototype (for reference only):

createLSDDetectorWithParams(params) -> retval

@spec detect(t(), Evision.Mat.maybe_mat_in(), integer(), integer()) ::
  [Evision.LineDescriptor.KeyLine.t()] | {:error, String.t()}

Detect lines inside an image.

Positional Arguments

• self: Evision.LineDescriptor.LSDDetector.t()

• image: Evision.Mat.

  input image

• scale: integer().

  scale factor used in pyramids generation

• numOctaves: integer().

  number of octaves inside pyramid

Keyword Arguments

• mask: Evision.Mat.

  mask matrix to detect only KeyLines of interest

Return

• keypoints: [Evision.LineDescriptor.KeyLine].

  vector that will store extracted lines for one or more images

Python prototype (for reference only):

detect(image, scale, numOctaves[, mask]) -> keypoints

@spec detect(
  t(),
  Evision.Mat.maybe_mat_in(),
  integer(),
  integer(),
  [{:mask, term()}] | nil
) ::
  [Evision.LineDescriptor.KeyLine.t()] | {:error, String.t()}

@spec detect(
  t(),
  [Evision.Mat.maybe_mat_in()],
  [[Evision.LineDescriptor.KeyLine.t()]],
  integer(),
  integer()
) :: t() | {:error, String.t()}

Variant 1:

detect

Positional Arguments

• self: Evision.LineDescriptor.LSDDetector.t()

• images: [Evision.Mat].

  input images

• keylines: [[Evision.LineDescriptor.KeyLine]].

  set of vectors that will store extracted lines for one or more images

• scale: integer().

  scale factor used in pyramids generation

• numOctaves: integer().

  number of octaves inside pyramid

Keyword Arguments

• masks: [Evision.Mat].

  vector of mask matrices to detect only KeyLines of interest from each input image

Has overloading in C++

Python prototype (for reference only):

detect(images, keylines, scale, numOctaves[, masks]) -> None

Variant 2:

Detect lines inside an image.

Positional Arguments

• self: Evision.LineDescriptor.LSDDetector.t()

• image: Evision.Mat.

  input image

• scale: integer().

  scale factor used in pyramids generation

• numOctaves: integer().

  number of octaves inside pyramid

Keyword Arguments

• mask: Evision.Mat.

  mask matrix to detect only KeyLines of interest

Return

• keypoints: [Evision.LineDescriptor.KeyLine].

  vector that will store extracted lines for one or more images

Python prototype (for reference only):

detect(image, scale, numOctaves[, mask]) -> keypoints

@spec detect(
  t(),
  [Evision.Mat.maybe_mat_in()],
  [[Evision.LineDescriptor.KeyLine.t()]],
  integer(),
  integer(),
  [{:masks, term()}] | nil
) :: t() | {:error, String.t()}

detect

Positional Arguments

• self: Evision.LineDescriptor.LSDDetector.t()

• images: [Evision.Mat].

  input images

• keylines: [[Evision.LineDescriptor.KeyLine]].

  set of vectors that will store extracted lines for one or more images

• scale: integer().

  scale factor used in pyramids generation

• numOctaves: integer().

  number of octaves inside pyramid

Keyword Arguments

• masks: [Evision.Mat].

  vector of mask matrices to detect only KeyLines of interest from each input image

Has overloading in C++

Python prototype (for reference only):

detect(images, keylines, scale, numOctaves[, masks]) -> None

@spec empty(Keyword.t()) :: any() | {:error, String.t()}

@spec empty(t()) :: boolean() | {:error, String.t()}

Returns true if the Algorithm is empty (e.g. in the very beginning or after unsuccessful read

Positional Arguments

• self: Evision.LineDescriptor.LSDDetector.t()

Return

• retval: bool

Python prototype (for reference only):

empty() -> retval

@spec getDefaultName(Keyword.t()) :: any() | {:error, String.t()}

@spec getDefaultName(t()) :: binary() | {:error, String.t()}

getDefaultName

Positional Arguments

• self: Evision.LineDescriptor.LSDDetector.t()

Return

• retval: String

Returns the algorithm string identifier. This string is used as top level xml/yml node tag when the object is saved to a file or string.

Python prototype (for reference only):

getDefaultName() -> retval

@spec lSDDetector(Keyword.t()) :: any() | {:error, String.t()}

@spec lSDDetector(Evision.LineDescriptor.LSDParam.t()) :: t() | {:error, String.t()}

LSDDetectorWithParams

Positional Arguments

• params: Evision.LineDescriptor.LSDParam

Return

• self: Evision.LineDescriptor.LSDDetector.t()

Python prototype (for reference only):

LSDDetectorWithParams(_params) -> <line_descriptor_LSDDetector object>

@spec read(t(), Evision.FileNode.t()) :: t() | {:error, String.t()}

Reads algorithm parameters from a file storage

Positional Arguments

• self: Evision.LineDescriptor.LSDDetector.t()
• func: Evision.FileNode

Python prototype (for reference only):

read(fn) -> None

@spec save(t(), binary()) :: t() | {:error, String.t()}

save

Positional Arguments

• self: Evision.LineDescriptor.LSDDetector.t()
• filename: String

Saves the algorithm to a file. In order to make this method work, the derived class must implement Algorithm::write(FileStorage& fs).

Python prototype (for reference only):

save(filename) -> None

@spec write(t(), Evision.FileStorage.t()) :: t() | {:error, String.t()}

Stores algorithm parameters in a file storage

Positional Arguments

• self: Evision.LineDescriptor.LSDDetector.t()
• fs: Evision.FileStorage

Python prototype (for reference only):

write(fs) -> None

@spec write(t(), Evision.FileStorage.t(), binary()) :: t() | {:error, String.t()}

write

Positional Arguments

• self: Evision.LineDescriptor.LSDDetector.t()
• fs: Evision.FileStorage
• name: String

Has overloading in C++

Python prototype (for reference only):

write(fs, name) -> None