View Source Evision.DenseOpticalFlow (Evision v0.2.9)
Summary
Functions
Calculates an optical flow.
Clears the algorithm state
Releases all inner buffers.
Returns true if the Algorithm is empty (e.g. in the very beginning or after unsuccessful read
getDefaultName
Reads algorithm parameters from a file storage
save
Stores algorithm parameters in a file storage
write
Types
@type t() :: %Evision.DenseOpticalFlow{ref: reference()}
Type that represents an DenseOpticalFlow
struct.
ref.
reference()
The underlying erlang resource variable.
Functions
@spec calc( t(), Evision.Mat.maybe_mat_in(), Evision.Mat.maybe_mat_in(), Evision.Mat.maybe_mat_in() ) :: Evision.Mat.t() | {:error, String.t()}
Calculates an optical flow.
Positional Arguments
self:
Evision.DenseOpticalFlow.t()
i0:
Evision.Mat
.first 8-bit single-channel input image.
i1:
Evision.Mat
.second input image of the same size and the same type as prev.
Return
flow:
Evision.Mat.t()
.computed flow image that has the same size as prev and type CV_32FC2.
Python prototype (for reference only):
calc(I0, I1, flow) -> flow
@spec clear(Keyword.t()) :: any() | {:error, String.t()}
@spec clear(t()) :: t() | {:error, String.t()}
Clears the algorithm state
Positional Arguments
- self:
Evision.DenseOpticalFlow.t()
Python prototype (for reference only):
clear() -> None
@spec collectGarbage(Keyword.t()) :: any() | {:error, String.t()}
@spec collectGarbage(t()) :: t() | {:error, String.t()}
Releases all inner buffers.
Positional Arguments
- self:
Evision.DenseOpticalFlow.t()
Python prototype (for reference only):
collectGarbage() -> 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.DenseOpticalFlow.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.DenseOpticalFlow.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.DenseOpticalFlow.t()
- func:
Evision.FileNode
Python prototype (for reference only):
read(fn) -> None
save
Positional Arguments
- self:
Evision.DenseOpticalFlow.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.DenseOpticalFlow.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.DenseOpticalFlow.t()
- fs:
Evision.FileStorage
- name:
String
Has overloading in C++
Python prototype (for reference only):
write(fs, name) -> None