Calculate new image sizes for outbound mode
        :param original_width: int
        :param original_height: int
        :param target_width: int
        :param target_height: int
        :return: tuple(int, int)

def outbound_sizes(cls, original_width, original_height, target_width, target_height):
        """
        Calculate new image sizes for outbound mode
        :param original_width: int
        :param original_height: int
        :param target_width: int
        :param target_height: int
        :return: tuple(int, int)
        """
        if target_width <= original_width and target_height <= original_height:
            k = original_width / float(original_height)
            k_w = original_width / float(target_width)
            k_h = original_height / float(target_height)

            if k_w > k_h:
                target_width = int(target_height * k)
            else:
                target_height = int(target_width / k)
        else:
            target_width = original_width
            target_height = original_height

        return target_width, target_height