xpad

Defined in xtensor/xpad.hpp

enum xt::pad_mode

Defines different algorithms to be used in xt::pad:

  • constant: Pads with a constant value.
  • symmetric: Pads with the reflection of the vector mirrored along the edge of the array.
  • reflect: Pads with the reflection of the vector mirrored on the first and last values of the vector along each axis.
  • wrap: Pads with the wrap of the vector along the axis. The first values are used to pad the end and the end values are used to pad the beginning.
  • periodic : == wrap (pads with periodic repetitions of the vector).

OpenCV to xtensor:

  • BORDER_CONSTANT == constant
  • BORDER_REFLECT == symmetric
  • BORDER_REFLECT_101 == reflect
  • BORDER_WRAP == wrap

Values:

constant
symmetric
reflect
wrap
periodic
template <class E, class S = typename std::decay_t<E>::size_type, class V = typename std::decay_t<E>::value_type>
auto xt::pad(E &&e, const std::vector<std::vector<S>> &pad_width, pad_mode mode = pad_mode::constant, V constant_value = 0)

Pad an array.

Return
The padded array.
Parameters
  • e: The array.
  • pad_width: Number of values padded to the edges of each axis: {{before_1, after_1}, ..., {before_N, after_N}}.
  • mode: The type of algorithm to use. [default: xt::pad_mode::constant].
  • constant_value: The value to set the padded values for each axis (used in xt::pad_mode::constant).

template <class E, class S = typename std::decay_t<E>::size_type, class V = typename std::decay_t<E>::value_type>
auto xt::pad(E &&e, const std::vector<S> &pad_width, pad_mode mode = pad_mode::constant, V constant_value = 0)

Pad an array.

Return
The padded array.
Parameters
  • e: The array.
  • pad_width: Number of values padded to the edges of each axis: {before, after}.
  • mode: The type of algorithm to use. [default: xt::pad_mode::constant].
  • constant_value: The value to set the padded values for each axis (used in xt::pad_mode::constant).

template <class E, class S = typename std::decay_t<E>::size_type, class V = typename std::decay_t<E>::value_type>
auto xt::pad(E &&e, S pad_width, pad_mode mode = pad_mode::constant, V constant_value = 0)

Pad an array.

Return
The padded array.
Parameters
  • e: The array.
  • pad_width: Number of values padded to the edges of each axis.
  • mode: The type of algorithm to use. [default: xt::pad_mode::constant].
  • constant_value: The value to set the padded values for each axis (used in xt::pad_mode::constant).

template <class E, class S = typename std::decay_t<E>::size_type>
auto xt::tile(E &&e, std::initializer_list<S> reps)

Tile an array.

Return
The tiled array.
Parameters
  • e: The array.
  • reps: The number of repetitions of A along each axis.

template <class E, class S = typename std::decay_t<E>::size_type, xtl::check_concept< xtl::is_integral< S > > = 0>
auto xt::tile(E &&e, S reps)

Tile an array.

Return
The tiled array.
Parameters
  • e: The array.
  • reps: The number of repetitions of A along the first axis.