View Source Evision.Legacy.Tracker (Evision v0.2.9)
Summary
Functions
Clears the algorithm state
Returns true if the Algorithm is empty (e.g. in the very beginning or after unsuccessful read
getDefaultName
Initialize the tracker with a known bounding box that surrounded the target
Reads algorithm parameters from a file storage
save
Update the tracker, find the new most likely bounding box for the target
Stores algorithm parameters in a file storage
write
Types
@type t() :: %Evision.Legacy.Tracker{ref: reference()}
Type that represents an Legacy.Tracker
struct.
ref.
reference()
The underlying erlang resource variable.
Functions
@spec clear(Keyword.t()) :: any() | {:error, String.t()}
@spec clear(Evision.Legacy.MultiTracker.t()) :: Evision.Legacy.MultiTracker.t() | {:error, String.t()}
Clears the algorithm state
Positional Arguments
- self:
Evision.Legacy.Tracker.t()
Python prototype (for reference only):
clear() -> None
@spec empty(Keyword.t()) :: any() | {:error, String.t()}
@spec empty(Evision.Legacy.MultiTracker.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.Legacy.Tracker.t()
Return
- retval:
bool
Python prototype (for reference only):
empty() -> retval
@spec getDefaultName(Keyword.t()) :: any() | {:error, String.t()}
@spec getDefaultName(Evision.Legacy.MultiTracker.t()) :: binary() | {:error, String.t()}
getDefaultName
Positional Arguments
- self:
Evision.Legacy.Tracker.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 init( Evision.Legacy.MultiTracker.t(), Evision.Mat.maybe_mat_in(), {number(), number(), number(), number()} ) :: boolean() | {:error, String.t()}
Initialize the tracker with a known bounding box that surrounded the target
Positional Arguments
self:
Evision.Legacy.Tracker.t()
image:
Evision.Mat
.The initial frame
boundingBox:
Rect2d
.The initial bounding box
Return
- retval:
bool
@return True if initialization went succesfully, false otherwise
Python prototype (for reference only):
init(image, boundingBox) -> retval
@spec read(Evision.Legacy.MultiTracker.t(), Evision.FileNode.t()) :: Evision.Legacy.MultiTracker.t() | {:error, String.t()}
Reads algorithm parameters from a file storage
Positional Arguments
- self:
Evision.Legacy.Tracker.t()
- func:
Evision.FileNode
Python prototype (for reference only):
read(fn) -> None
@spec save(Evision.Legacy.MultiTracker.t(), binary()) :: Evision.Legacy.MultiTracker.t() | {:error, String.t()}
save
Positional Arguments
- self:
Evision.Legacy.Tracker.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 update(Evision.Legacy.MultiTracker.t(), Evision.Mat.maybe_mat_in()) :: {number(), number(), number(), number()} | false | {:error, String.t()}
Update the tracker, find the new most likely bounding box for the target
Positional Arguments
self:
Evision.Legacy.Tracker.t()
image:
Evision.Mat
.The current frame
Return
retval:
bool
boundingBox:
Rect2d
.The bounding box that represent the new target location, if true was returned, not modified otherwise
@return True means that target was located and false means that tracker cannot locate target in current frame. Note, that latter does not imply that tracker has failed, maybe target is indeed missing from the frame (say, out of sight)
Python prototype (for reference only):
update(image) -> retval, boundingBox
@spec write(Evision.Legacy.MultiTracker.t(), Evision.FileStorage.t()) :: Evision.Legacy.MultiTracker.t() | {:error, String.t()}
Stores algorithm parameters in a file storage
Positional Arguments
- self:
Evision.Legacy.Tracker.t()
- fs:
Evision.FileStorage
Python prototype (for reference only):
write(fs) -> None
@spec write(Evision.Legacy.MultiTracker.t(), Evision.FileStorage.t(), binary()) :: Evision.Legacy.MultiTracker.t() | {:error, String.t()}
write
Positional Arguments
- self:
Evision.Legacy.Tracker.t()
- fs:
Evision.FileStorage
- name:
String
Has overloading in C++
Python prototype (for reference only):
write(fs, name) -> None