keras-team/keras · error · ValueError

`patches` has unexpected rank for 2D reconstruction. Expecte

Error message

`patches` has unexpected rank for 2D reconstruction. Expected 3 (unbatched) or 4 (batched). Received shape: {patches.shape}

What it means

Error "`patches` has unexpected rank for 2D reconstruction. Expected 3 (unbatched) or 4 (batched). Received shape: {patches.shape}" thrown in keras-team/keras.

Source

Thrown at keras/src/ops/image.py:1252

            patches = backend.numpy.transpose(patches, axes=(0, 2, 3, 1))
        else:
            raise ValueError(
                "`patches` has unexpected rank for 2D channels_first "
                "reconstruction. Expected 3 (unbatched) or 4 (batched). "
                f"Received shape: {patches.shape}"
            )
        result = _reconstruct_patches_2d(
            patches, size, output_size, strides, padding, "channels_last"
        )
        if len(result.shape) == 3:
            return backend.numpy.transpose(result, axes=(2, 0, 1))
        return backend.numpy.transpose(result, axes=(0, 3, 1, 2))

    pH, pW = size
    H, W = output_size

    if len(patches.shape) not in (3, 4):
        raise ValueError(
            "`patches` has unexpected rank for 2D reconstruction. "
            "Expected 3 (unbatched) or 4 (batched). "
            f"Received shape: {patches.shape}"
        )

    _unbatched = False
    if len(patches.shape) == 3:
        _unbatched = True
        patches = backend.numpy.expand_dims(patches, axis=0)

    shp = ops.shape(patches)
    B, gH, gW = shp[0], shp[1], shp[2]
    static_flat = patches.shape[-1]
    if static_flat is None:
        C = shp[3] // (pH * pW)
    else:
        if static_flat % (pH * pW) != 0:
            raise ValueError(

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/ops/image.py:1252 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/50cd4e7ca1207bef. Report an issue: GitHub.