tf.image.stateless_random_contrast

Adjust the contrast of images by a random factor deterministically.

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

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).

Args
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)>

Returns
The contrast-adjusted image(s).

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