mindspore.dataset.vision.RandomVerticalFlip

View Source On Gitee
class mindspore.dataset.vision.RandomVerticalFlip(prob=0.5)[source]

Randomly flip the input image vertically with a given probability.

Parameters

prob (float, optional) – Probability of the image being flipped, which must be in range of [0.0, 1.0]. Default: 0.5.

Raises

  • TypeError – If prob is not of type float.

  • ValueError – If prob is not in range [0.0, 1.0].

  • RuntimeError – If given tensor shape is not <H, W> or <H, W, C>.

Supported Platforms:

CPU

Examples

>>> import numpy as np
>>> import mindspore.dataset as ds
>>> import mindspore.dataset.vision as vision
>>>
>>> # Use the transform in dataset pipeline mode
>>> data = np.random.randint(0, 255, size=(1, 100, 100, 3)).astype(np.uint8)
>>> numpy_slices_dataset = ds.NumpySlicesDataset(data, ["image"])
>>> transforms_list = [vision.RandomVerticalFlip(0.25)]
>>> numpy_slices_dataset = numpy_slices_dataset.map(operations=transforms_list, input_columns=["image"])
>>> for item in numpy_slices_dataset.create_dict_iterator(num_epochs=1, output_numpy=True):
...     print(item["image"].shape, item["image"].dtype)
...     break
(100, 100, 3) uint8
>>>
>>> # Use the transform in eager mode
>>> data = np.array([[0, 1, 2, 3, 4, 5]], dtype=np.uint8).reshape((2, 3))
>>> output = vision.RandomVerticalFlip(1.0)(data)
>>> print(output.shape, output.dtype)
(2, 3) uint8
Tutorial Examples: