keras-team/keras · error · ValueError

Expected the input image to be rank 3 or 4. Received: inputs

Error message

Expected the input image to be rank 3 or 4. Received: inputs.shape={images_shape}

What it means

Error "Expected the input image to be rank 3 or 4. Received: inputs.shape={images_shape}" thrown in keras-team/keras.

Source

Thrown at keras/src/layers/preprocessing/image_preprocessing/random_posterization.py:80

            raise ValueError(
                self._VALUE_RANGE_VALIDATION_ERROR
                + f"Received: value_range={value_range}"
            )
        self.value_range = sorted(value_range)

    def get_random_transformation(self, data, training=True, seed=None):
        if isinstance(data, dict):
            images = data["images"]
        else:
            images = data
        images_shape = self.backend.shape(images)
        rank = len(images_shape)
        if rank == 3:
            batch_size = 1
        elif rank == 4:
            batch_size = images_shape[0]
        else:
            raise ValueError(
                "Expected the input image to be rank 3 or 4. Received: "
                f"inputs.shape={images_shape}"
            )

        if seed is None:
            seed = self._get_seed_generator(self.backend._backend)

        if self.factor[0] != self.factor[1]:
            factor = self.backend.random.randint(
                (batch_size,),
                minval=self.factor[0],
                maxval=self.factor[1],
                seed=seed,
                dtype="uint8",
            )
        else:
            factor = (
                self.backend.numpy.ones((batch_size,), dtype="uint8")

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/layers/preprocessing/image_preprocessing/random_posterization.py:80 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/2d9c0d6252a59218. Report an issue: GitHub.