图处字符串，应该如何转化为图片
/z8/ID8gAgEBAQEBAgEBAQICAgICBAMCAgICBQQEAwQGBQYGBgUGBgYHCQgGBwkHBgYICwgJBggLDAsMCQECAgICAgIFAwMFBwYH/z8gEQgBPyADASIgAhEBAxEB/z8/ICABBQEBAQEBASAgICAgICAgAQI................................
k5v3b6HiP2k/1tTW0rVLPz9HTp/LuLY/hcE/P+PxFT8/id4D+Jca33hvxHbm5nAkk0w/P25KhXkBfnIyhIr85re4kaU/16FoOj8/0m4cfe/h+np9eK6q9GNeKj95dKq4S1R97G1lhOyS2ORwyvxz6YNPt7k/Zi8tW/3lOPy6181fD79rPxB4aj8fxPpS67bw/It0JA==
上面这个64位字符的图片是什么图格式。如何转化？
