A method that provides identification information for a portion of a video stream includes receiving a video stream, wherein the video stream includes one or more successive video scenes, wherein the one or more successive video scenes respectively corresponds to one or more sets of visual information, wherein each of the one or more successive video scenes includes plural successive pictures, wherein a first visual object is included in a first video scene, wherein the one or more successive video scenes includes the first video scene, detecting the first visual object over a first plurality of pictures of the first video scene, deriving information corresponding to one or more measured transitions of the first visual object over the first plurality of pictures of the first video scene, and providing identification information corresponding to the derived information.