|---| | [ View source on GitHub](https://github.com/keras-team/keras/tree/v2.15.0/keras/preprocessing/image.py#L2438-L2470) | Performs a random brightness shift. tf.keras.preprocessing.image.random_brightness( x, brightness_range, scale=True ) > [!WARNING] > **Deprecated:** [`tf.keras.preprocessing.image.random_brightness`](https://www.tensorflow.org/versions/r2.15/api_docs/python/tf/keras/preprocessing/image/random_brightness) does not operate on tensors and is not recommended for new code. Prefer [`tf.keras.layers.RandomBrightness`](https://www.tensorflow.org/versions/r2.15/api_docs/python/tf/keras/layers/RandomBrightness) which provides equivalent functionality as a preprocessing layer. For more information, see the tutorial for [augmenting images](https://www.tensorflow.org/tutorials/images/data_augmentation), as well as the [preprocessing layer guide](https://www.tensorflow.org/guide/keras/preprocessing_layers).


| ## Args || |---|---| | `x` | Input tensor. Must be 3D. | | `brightness_range` | Tuple of floats; brightness range. | | `scale` | Whether to rescale the image such that minimum and maximum values are 0 and 255 respectively. Default: True. |



| ## Returns || |---|---| | Numpy image tensor. ||



| ## Raises || |---|---| | ValueError if `brightness_range` isn't a tuple. ||