44edfba78536668c2240e8e722029741a547bd9a,chainercv/transforms/image/rotate.py,,rotate,#Any#Any#Any#Any#Any#,21

Before Change

    elif interpolation == PIL.Image.BICUBIC:
        interpolation_order = 3

    return scipy.ndimage.rotate(
        img, angle, axes=(2, 1), reshape=expand,
        order=interpolation_order, cval=fill)

After Change

        if _cv2_available:
            return _rotate_cv2(img, angle, expand, fill, interpolation)
        else:
            warnings.warn(
                "Although `chainer.config.cv_rotate_backend == "cv2"`, "
                "cv2 is not found. As a fallback option, rotate uses "
                "PIL. Either install cv2 or set "
                "`chainer.global_config.cv_rotate_backend = "PIL"` to "
                "suppress this warning.")
            return _rotate_pil(img, angle, expand, fill, interpolation)
    elif chainer.config.cv_rotate_backend == "PIL":
        return _rotate_pil(img, angle, expand, fill, interpolation)
    else:

Instances