It’s a search bot originated by Chinese search engine Baidu.
Robot Name: BaiDuSpider
Agent_String: Baiduspider+(+http://www.baidu.com/search/spider.htm)
URL: http://www.baidu.com/search/spider.htm
IP Addr: 220.181.32.11 220.181.32.16 220.181.32.22 220.181.32.49 220.181.32.51 220.181.32.64 220.181.32.68 220.181.32.98 220.181.50.207 220.181.50.220 61.135.168.131 61.135.168.14 61.135.168.173 61.135.168.39
More information can be found here: http://www.useragentstring.com/pages/Baiduspider/
You can ban IP addresses on your server/domain to prevent Baidu from indexing your web site. However, if you have no problem with Google indexing your picture I can hardly understand why would you have a problem with Baidu.