keras-team/keras · error · ValueError

The `scale` argument should be a number in the range [0,1].

Error message

The `scale` argument should be a number in the range [0,1]. Received: scale={scale}

What it means

Error "The `scale` argument should be a number in the range [0,1]. Received: scale={scale}" thrown in keras-team/keras.

Source

Thrown at keras/src/layers/preprocessing/image_preprocessing/random_perspective.py:78

        factor=1.0,
        scale=1.0,
        interpolation="bilinear",
        fill_value=0.0,
        seed=None,
        data_format=None,
        **kwargs,
    ):
        super().__init__(data_format=data_format, **kwargs)
        self._set_factor(factor)
        self.scale = scale
        self.fill_value = fill_value
        self.interpolation = interpolation
        self.seed = seed
        self.generator = SeedGenerator(seed)
        self.supports_jit = False

        if scale < 0.0 or scale > 1.0:
            raise ValueError(
                "The `scale` argument should be a number "
                "in the range "
                f"[0,1]. "
                f"Received: scale={scale}"
            )

        if interpolation not in self._SUPPORTED_INTERPOLATION:
            raise NotImplementedError(
                f"Unknown `interpolation` {interpolation}. Expected of one "
                f"{self._SUPPORTED_INTERPOLATION}."
            )

        if self.data_format == "channels_first":
            self.height_axis = -2
            self.width_axis = -1
            self.channel_axis = -3
        else:
            self.height_axis = -3

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/layers/preprocessing/image_preprocessing/random_perspective.py:78 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/c92187c43509b900. Report an issue: GitHub.