xpad — xtensor documentation (original) (raw)

xtensor

Defined in xtensor/misc/xpad.hpp

enum class xt::pad_mode

Defines different algorithms to be used in [xt::pad](#namespacext%5F1a0006ff814bef7534b9fa5187b1863feb):

• 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:

enumerator constant

enumerator symmetric

enumerator reflect

enumerator wrap

enumerator periodic

enumerator edge

template<class E, class S = typename std::decay_t<E>::size_type, class V = typename std::decay_t<E>::value_type>
inline 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.

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).

Returns:

The padded array.

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

Pad an 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).

Returns:

The padded array.

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

Pad an 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).

Returns:

The padded array.

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

Tile an array.

Parameters:

• e – The array.
• reps – The number of repetitions of A along each axis.

Returns:

The tiled array.

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

Tile an array.

Parameters:

• e – The array.
• reps – The number of repetitions of A along the first axis.

Returns:

The tiled array.