11. A method for annotating a video of an environment in an eye tracking system comprising: acquiring the video and a set of gaze tracking coordinates representing, for each of a plurality of frames comprising the video, a position within the environment at which a user is looking; extracting a set of features from a region of interest defined around the gaze coordinates for a given frame; selecting an area of interest from at least one stored area of interest in a library by comparing the extracted set of features to at least one set of features corresponding to the at least one stored area of interest in the library to provide a confidence value; accepting the selected area of interest if confidence value meets a threshold value; and providing the region of interest to a human expert for assignment of an object label if the confidence value does not meet a threshold value.
11. A method for annotating a video of an environment in an eye tracking system comprising: acquiring the video and a set of gaze tracking coordinates representing, for each of a plurality of frames comprising the video, a position within the environment at which a user is looking; extracting a set of features from a region of interest defined around the gaze coordinates for a given frame; selecting an area of interest from at least one stored area of interest in a library by comparing the extracted set of features to at least one set of features corresponding to the at least one stored area of interest in the library to provide a confidence value; accepting the selected area of interest if confidence value meets a threshold value; and providing the region of interest to a human expert for assignment of an object label if the confidence value does not meet a threshold value. 15. The method of claim 11 , wherein extracting the set of features from the region of interest comprises: extracting a plurality of features via a spatial pyramid histogram technique; and extracting a plurality of features from a measured optical flow between two frames of the video within the region of interest.