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

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

Clears the algorithm state

Positional Arguments

• self: Evision.XImgProc.StructuredEdgeDetection.t()

Python prototype (for reference only):

clear() -> None

@spec computeOrientation(t(), Evision.Mat.maybe_mat_in()) ::
  Evision.Mat.t() | {:error, String.t()}

The function computes orientation from edge image.

Positional Arguments

• self: Evision.XImgProc.StructuredEdgeDetection.t()

• src: Evision.Mat.

  edge image.

Return

• dst: Evision.Mat.t().

  orientation image.

Python prototype (for reference only):

computeOrientation(src[, dst]) -> dst

@spec computeOrientation(
  t(),
  Evision.Mat.maybe_mat_in(),
  [{atom(), term()}, ...] | nil
) ::
  Evision.Mat.t() | {:error, String.t()}

The function computes orientation from edge image.

Positional Arguments

• self: Evision.XImgProc.StructuredEdgeDetection.t()

• src: Evision.Mat.

  edge image.

Return

• dst: Evision.Mat.t().

  orientation image.

Python prototype (for reference only):

computeOrientation(src[, dst]) -> dst

@spec detectEdges(t(), Evision.Mat.maybe_mat_in()) ::
  Evision.Mat.t() | {:error, String.t()}

The function detects edges in src and draw them to dst.

Positional Arguments

• self: Evision.XImgProc.StructuredEdgeDetection.t()

• src: Evision.Mat.

  source image (RGB, float, in [0;1]) to detect edges

Return

• dst: Evision.Mat.t().

  destination image (grayscale, float, in [0;1]) where edges are drawn

The algorithm underlies this function is much more robust to texture presence, than common approaches, e.g. Sobel @sa Sobel, Canny

Python prototype (for reference only):

detectEdges(src[, dst]) -> dst

@spec detectEdges(t(), Evision.Mat.maybe_mat_in(), [{atom(), term()}, ...] | nil) ::
  Evision.Mat.t() | {:error, String.t()}

The function detects edges in src and draw them to dst.

Positional Arguments

• self: Evision.XImgProc.StructuredEdgeDetection.t()

• src: Evision.Mat.

  source image (RGB, float, in [0;1]) to detect edges

Return

• dst: Evision.Mat.t().

  destination image (grayscale, float, in [0;1]) where edges are drawn

The algorithm underlies this function is much more robust to texture presence, than common approaches, e.g. Sobel @sa Sobel, Canny

Python prototype (for reference only):

detectEdges(src[, dst]) -> dst

@spec edgesNms(t(), Evision.Mat.maybe_mat_in(), Evision.Mat.maybe_mat_in()) ::
  Evision.Mat.t() | {:error, String.t()}

The function edgenms in edge image and suppress edges where edge is stronger in orthogonal direction.

Positional Arguments

• self: Evision.XImgProc.StructuredEdgeDetection.t()

• edge_image: Evision.Mat.

  edge image from detectEdges function.

• orientation_image: Evision.Mat.

  orientation image from computeOrientation function.

Keyword Arguments

• r: integer().

  radius for NMS suppression.

• s: integer().

  radius for boundary suppression.

• m: float.

  multiplier for conservative suppression.

• isParallel: bool.

  enables/disables parallel computing.

Return

• dst: Evision.Mat.t().

  suppressed image (grayscale, float, in [0;1])

Python prototype (for reference only):

edgesNms(edge_image, orientation_image[, dst[, r[, s[, m[, isParallel]]]]]) -> dst

@spec edgesNms(
  t(),
  Evision.Mat.maybe_mat_in(),
  Evision.Mat.maybe_mat_in(),
  [isParallel: term(), m: term(), r: term(), s: term()] | nil
) :: Evision.Mat.t() | {:error, String.t()}

The function edgenms in edge image and suppress edges where edge is stronger in orthogonal direction.

Positional Arguments

• self: Evision.XImgProc.StructuredEdgeDetection.t()

• edge_image: Evision.Mat.

  edge image from detectEdges function.

• orientation_image: Evision.Mat.

  orientation image from computeOrientation function.

Keyword Arguments

• r: integer().

  radius for NMS suppression.

• s: integer().

  radius for boundary suppression.

• m: float.

  multiplier for conservative suppression.

• isParallel: bool.

  enables/disables parallel computing.

Return

• dst: Evision.Mat.t().

  suppressed image (grayscale, float, in [0;1])

Python prototype (for reference only):

edgesNms(edge_image, orientation_image[, dst[, r[, s[, m[, isParallel]]]]]) -> dst

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

Reads algorithm parameters from a file storage

Positional Arguments

• self: Evision.XImgProc.StructuredEdgeDetection.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.XImgProc.StructuredEdgeDetection.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.XImgProc.StructuredEdgeDetection.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.XImgProc.StructuredEdgeDetection.t()
• fs: Evision.FileStorage
• name: String

Has overloading in C++

Python prototype (for reference only):

write(fs, name) -> None