Change image size by height
        :param resource: Image
        :return: Image

def _heighten(self, resource):
        """
        Change image size by height
        :param resource: Image
        :return: Image
        """
        original_width, original_height = resource.size

        target_height = self.value
        target_width = int((float(target_height) / original_height) * original_width)

        resource = resource.resize((target_width, target_height), Image.ANTIALIAS)

        return resource