keras-team/keras · error · ValueError

Invalid images dtype: expected float dtype. Received: images

Error message

Invalid images dtype: expected float dtype. Received: images.dtype={backend.standardize_dtype(dtype)}

What it means

Error "Invalid images dtype: expected float dtype. Received: images.dtype={backend.standardize_dtype(dtype)}" thrown in keras-team/keras.

Source

Thrown at keras/src/backend/tensorflow/image.py:93

        [0.2989, 0.5870, 0.1140], dtype=images.dtype
    )
    images = tf.tensordot(images, rgb_weights, axes=(channels_axis, -1))
    images = tf.expand_dims(images, axis=channels_axis)
    return tf.cast(images, original_dtype)


def rgb_to_hsv(images, data_format=None):
    images = convert_to_tensor(images)
    dtype = images.dtype
    data_format = backend.standardize_data_format(data_format)
    if len(images.shape) not in (3, 4):
        raise ValueError(
            "Invalid images rank: expected rank 3 (single image) "
            "or rank 4 (batch of images). Received input with shape: "
            f"images.shape={images.shape}"
        )
    if not backend.is_float_dtype(dtype):
        raise ValueError(
            "Invalid images dtype: expected float dtype. "
            f"Received: images.dtype={backend.standardize_dtype(dtype)}"
        )
    if data_format == "channels_first":
        if len(images.shape) == 4:
            images = tf.transpose(images, (0, 2, 3, 1))
        else:
            images = tf.transpose(images, (1, 2, 0))
    images = tf.image.rgb_to_hsv(images)
    if data_format == "channels_first":
        if len(images.shape) == 4:
            images = tf.transpose(images, (0, 3, 1, 2))
        elif len(images.shape) == 3:
            images = tf.transpose(images, (2, 0, 1))
    return images


def hsv_to_rgb(images, data_format=None):

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/backend/tensorflow/image.py:93 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of keras-team/keras@7a34a03db6 (2026-08-25). Data as JSON: /api/errors/5762e451332355d2. Report an issue: GitHub.