import base64


def encode_image(image_path: str) -> str:
    """
    Encodes an image file into a Base64 string.

    Args:
        image_path (str): The path to the image file.

    Returns:
        str: The Base64 encoded string representation of the image.

    Raises:
        FileNotFoundError: If the specified image file does not exist.
        IOError: If there is an error reading the image file.
    """
    try:
        with open(image_path, "rb") as img_file:
            return base64.b64encode(img_file.read()).decode()
    except FileNotFoundError:
        raise FileNotFoundError(f"Image file not found at: {image_path}")
    except OSError as e:
        raise OSError(f"Error reading image file: {e}")