RandomRotation layer

RandomRotation class

tf.keras.layers.experimental.preprocessing.RandomRotation(
    factor,
    fill_mode="reflect",
    interpolation="bilinear",
    seed=None,
    fill_value=0.0,
    **kwargs
)

Randomly rotate each image.

By default, random rotations are only applied during training. At inference time, the layer does nothing. If you need to apply random rotations at inference time, set training to True when calling the layer.

Input shape

4D tensor with shape: (samples, height, width, channels), data_format='channels_last'.

Output shape

4D tensor with shape: (samples, height, width, channels), data_format='channels_last'.

Attributes

  • factor: a float represented as fraction of 2pi, or a tuple of size 2 representing lower and upper bound for rotating clockwise and counter-clockwise. A positive values means rotating counter clock-wise, while a negative value means clock-wise. When represented as a single float, this value is used for both the upper and lower bound. For instance, factor=(-0.2, 0.3) results in an output rotation by a random amount in the range [-20% * 2pi, 30% * 2pi]. factor=0.2 results in an output rotating by a random amount in the range [-20% * 2pi, 20% * 2pi].
  • fill_mode: Points outside the boundaries of the input are filled according to the given mode (one of {'constant', 'reflect', 'wrap', 'nearest'}).
    • reflect: (d c b a | a b c d | d c b a) The input is extended by reflecting about the edge of the last pixel.
    • constant: (k k k k | a b c d | k k k k) The input is extended by filling all values beyond the edge with the same constant value k = 0.
    • wrap: (a b c d | a b c d | a b c d) The input is extended by wrapping around to the opposite edge.
    • nearest: (a a a a | a b c d | d d d d) The input is extended by the nearest pixel.
  • interpolation: Interpolation mode. Supported values: "nearest", "bilinear".
  • seed: Integer. Used to create a random seed.
  • fill_value: a float represents the value to be filled outside the boundaries when fill_mode is "constant".

Raise: ValueError: if either bound is not between [0, 1], or upper bound is less than lower bound.