def get_output_detections_image_file_path(input_file_path, suffix="--detections"):
    """Get the appropriate output image path for a given image input.

    Effectively appends "--detections" to the original image file and 
    places it within the same directory.

    Parameters
    -----------
    input_file_path: str
        Path to input image.

    suffix: str
        Suffix appended to the file.
        Default: "--detections"

    Returns
    -------
    str
        Full path for detections output image.
    """
    input_file_path = input_file_path.replace('--original.', '.')
    input_file_paths = input_file_path.split('.')
    input_file_paths[-2] = input_file_paths[-2]+suffix
    return '.'.join(input_file_paths)