@spec destroyAllWindows() :: :ok

Close all windows

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

Close a named window

Positional Arguments

• winname. String

  The name of the window.

@spec imshow(String.t(), Evision.Mat.maybe_mat_in() | Nx.Tensor.t()) ::
  :ok | {:error, String.t()}

Show a mat in a named window

Positional Arguments

• winname. String

  The name of the window.

• mat. Evision.Mat

  The image.

Example

iex> mat = Evision.imread!("example.jpg")
iex> Evision.imshow("OpenCV", mat)
# the following line may be necessary on your system
# will try to improve this later
iex> Evision.waitkey(0)

@spec waitKey(integer()) :: :ok | {:error, String.t()}

Wait for user keyboard event for a delay amount of time (ms)

Positional Arguments

• delay. int

  Wait for delay ms.