这里看到的角色的正确术语是什么?
data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAkGBhQSERUUExQVFRUWGRwaGBgYGB0dGxkcHxccGxocGxoYHCYgGxojHBsdHy8gJCgpLSwsGB4xNTAqNSYrLCkBCQoKDgwOGg8PGiklHx8pLCwpKSkpKSwpLCkpKSwpLCksKSwsLCkpKSkpLCkpKSwpLCwsKSwsLCksKSkpKSksKf/AABEIAJ0BQQMBIgACEQEDEQH/xAAcAAACAwEBAQEAAAAAAAAAAAAEBQIDBgEABwj/xABFEAACAQIEBAQDBgMGAwcFAAABAhEDIQAEEjEFQVFhBhMicTKBkRRCobHB8CNS0QcVM1Ni4RaS8TRygpOiwtIkQ1RVY//EABoBAAIDA..
这是二进制数据的字符串表示吗?图像的字符串表示?