tf.image.stateless_random_contrast

Adjust the contrast of images by a random factor deterministically.

tf.image.stateless_random_contrast(
    image, lower, upper, seed
)

Used in the notebooks

Used in the tutorials

Guarantees the same results given the same seed independent of how many times the function is called, and independent of global seed settings (e.g. tf.random.set_seed).

image An image tensor with 3 or more dimensions.
lower float. Lower bound for the random contrast factor.
upper float. Upper bound for the random contrast factor.
seed A shape [2] Tensor, the seed to the random number generator. Must have dtype int32 or int64. (When using XLA, only int32 is allowed.)

Usage Example:

x = [[[1.0, 2.0, 3.0],
      [4.0, 5.0, 6.0]],
     [[7.0, 8.0, 9.0],
      [10.0, 11.0, 12.0]]]
seed = (1, 2)
tf.image.stateless_random_contrast(x, 0.2, 0.5, seed)
<tf.Tensor: shape=(2, 2, 3), dtype=float32, numpy=
array([[[3.4605184, 4.4605184, 5.4605184],
        [4.820173 , 5.820173 , 6.820173 ]],
       [[6.179827 , 7.179827 , 8.179828 ],
        [7.5394816, 8.539482 , 9.539482 ]]], dtype=float32)>

The contrast-adjusted image(s).

ValueError if upper <= lower or if lower < 0.