tf.image.random_contrast
Adjust the contrast of an image or images by a random factor.
tf.image.random_contrast(
image, lower, upper, seed=None
)
Equivalent to adjust_contrast() but uses a contrast_factor randomly picked in the interval [lower, upper).
| 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 Python integer. Used to create a random seed. See tf.compat.v1.set_random_seed for behavior. |
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]]]
tf.image.random_contrast(x, 0.2, 0.5)
<tf.Tensor: shape=(2, 2, 3), dtype=float32, numpy=...>
| Returns |
|---|
| The contrast-adjusted image(s). |
| Raises |
|---|
ValueError | if upper <= lower or if lower < 0. |