1. A terminal comprising: an image acquisition unit configured to start a second image acquisition device to acquire a characteristic image of at least one photographer when it is detected that the terminal uses a first image acquisition device to acquire an image; an information acquisition unit configured to recognize and process the characteristic image acquired by the second acquisition device so as to acquire a recognition information list; a processing unit configured to execute a preset operation on the image file acquired by the first image acquisition device according to the recognition information list.