What is the subject of Edward Curtis' photography?

Chief Edward Curtis is the subject of portrait photography. According to relevant public information, there are three categories of photographic subjects: scenery, portrait and documentary. In Edward Curtis, the Indian chief photographed belongs to portrait photography. Portrait photography refers to taking the characters as the main body and setting off the surrounding environment, highlighting the characters to express some feelings or records. The beauty of the characters. Portrait photography is divided into documentary portraits and small fresh portraits.