View Source Evision.Quality.QualityBase (Evision v0.2.9)

Summary

Types

t()

Type that represents an Quality.QualityBase struct.

Functions

Implements Algorithm::clear()

Compute quality score per channel with the per-channel score in each element of the resulting cv::Scalar. See specific algorithm for interpreting result scores

Implements Algorithm::empty()

Returns output quality map that was generated during computation, if supported by the algorithm

Returns output quality map that was generated during computation, if supported by the algorithm

Reads algorithm parameters from a file storage

Stores algorithm parameters in a file storage

Types

@type t() :: %Evision.Quality.QualityBase{ref: reference()}

Type that represents an Quality.QualityBase struct.

  • ref. reference()

    The underlying erlang resource variable.

Functions

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

Implements Algorithm::clear()

Positional Arguments
  • self: Evision.Quality.QualityBase.t()

Python prototype (for reference only):

clear() -> None
@spec compute(Keyword.t()) :: any() | {:error, String.t()}
@spec compute(t(), Evision.Mat.maybe_mat_in()) ::
  Evision.scalar() | {:error, String.t()}

Compute quality score per channel with the per-channel score in each element of the resulting cv::Scalar. See specific algorithm for interpreting result scores

Positional Arguments
  • self: Evision.Quality.QualityBase.t()

  • img: Evision.Mat.

    comparison image, or image to evalute for no-reference quality algorithms

Return
  • retval: Evision.scalar().t()

Python prototype (for reference only):

compute(img) -> retval
@spec empty(Keyword.t()) :: any() | {:error, String.t()}
@spec empty(t()) :: boolean() | {:error, String.t()}

Implements Algorithm::empty()

Positional Arguments
  • self: Evision.Quality.QualityBase.t()
Return
  • retval: bool

Python prototype (for reference only):

empty() -> retval
Link to this function

getDefaultName(named_args)

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

getDefaultName

Positional Arguments
  • self: Evision.Quality.QualityBase.t()
Return

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
Link to this function

getQualityMap(named_args)

View Source
@spec getQualityMap(Keyword.t()) :: any() | {:error, String.t()}
@spec getQualityMap(t()) :: Evision.Mat.t() | {:error, String.t()}

Returns output quality map that was generated during computation, if supported by the algorithm

Positional Arguments
  • self: Evision.Quality.QualityBase.t()
Return
  • dst: Evision.Mat.t().

Python prototype (for reference only):

getQualityMap([, dst]) -> dst
Link to this function

getQualityMap(self, opts)

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

Returns output quality map that was generated during computation, if supported by the algorithm

Positional Arguments
  • self: Evision.Quality.QualityBase.t()
Return
  • dst: Evision.Mat.t().

Python prototype (for reference only):

getQualityMap([, dst]) -> dst
@spec read(Keyword.t()) :: any() | {:error, String.t()}
@spec read(t(), Evision.FileNode.t()) :: t() | {:error, String.t()}

Reads algorithm parameters from a file storage

Positional Arguments

Python prototype (for reference only):

read(fn) -> None
@spec save(Keyword.t()) :: any() | {:error, String.t()}
@spec save(t(), binary()) :: t() | {:error, String.t()}

save

Positional Arguments
  • self: Evision.Quality.QualityBase.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(Keyword.t()) :: any() | {:error, String.t()}
@spec write(t(), Evision.FileStorage.t()) :: t() | {:error, String.t()}

Stores algorithm parameters in a file storage

Positional Arguments

Python prototype (for reference only):

write(fs) -> None
@spec write(t(), Evision.FileStorage.t(), binary()) :: t() | {:error, String.t()}

write

Positional Arguments

Has overloading in C++

Python prototype (for reference only):

write(fs, name) -> None