mindspore.dataset.vision.c_transforms.Pad

class mindspore.dataset.vision.c_transforms.Pad(padding, fill_value=0, padding_mode=Border.CONSTANT)[source]

Pads the image according to padding parameters.

Parameters

  • padding (Union[int, sequence]) – The number of pixels to pad the image. If a single number is provided, it pads all borders with this value. If a tuple or list of 2 values are provided, it pads the (left and top) with the first value and (right and bottom) with the second value. If 4 values are provided as a list or tuple, it pads the left, top, right and bottom respectively.

  • fill_value (Union[int, tuple], optional) – The pixel intensity of the borders, only valid for padding_mode Border.CONSTANT (default=0). If it is an integer, it is used for all RGB channels. If it is a 3-tuple, it is used to fill R, G, B channels respectively. The fill_value values must be in range [0, 255].

  • padding_mode (Border mode, optional) –

    The method of padding (default=Border.CONSTANT). Can be any of [Border.CONSTANT, Border.EDGE, Border.REFLECT, Border.SYMMETRIC].

    • Border.CONSTANT, means it fills the border with constant values.

    • Border.EDGE, means it pads with the last value on the edge.

    • Border.REFLECT, means it reflects the values on the edge omitting the last value of edge.

    • Border.SYMMETRIC, means it reflects the values on the edge repeating the last value of edge.

Examples

>>> import mindspore.dataset.vision.c_transforms as c_vision
>>> from mindspore.dataset.transforms.vision import Border
>>>
>>> transforms_list = [c_vision.Decode(), c_vision.Pad([100, 100, 100, 100])]
>>> data1 = data1.map(operations=transforms_list, input_columns=["image"])