Method and apparatus for evaluating results of gaze detection

摘要

The invention relates to a method and an apparatus for evaluating results of gaze detection, wherein these results are present or are obtained in the form of information which defines, for each of a multiplicity of successive times, a viewing direction detected at this time and a focal point identified thereby in a scene image assigned to this time. For this purpose, the invention provides for the following steps to be carried out: —a temporal change in the viewing direction and/or the focal point is evaluated in order to identify different viewing events which differ from one another by different speeds of an eye movement, wherein saccades and fixations and/or pursuit movements are detected as different types of viewing events and the identified viewing events are classified according to the type thereof, —a period of time spanned by the times is divided into intervals in such a manner that an interval corresponding to a duration of the particular viewing event is assigned to each of the identified viewing events, wherein at least some of these intervals each contain a sequence of a plurality of times, —precisely one of the times or a true subset of the times is selected in each case from each of the intervals assigned to a fixation or a pursuit movement, —and, for each of these selected times, the focal point identified in the scene image assigned to the particular time is mapped to a position corresponding to this focal point in a reference image.

主权项

1. A method for evaluating results of an eye tracking, these results being present or obtained as information which defines, for each of a large number of successive moments, respectively a gaze direction detected at this moment and a consequently identified visual point in a scene image assigned to this moment, the scene images being time-dependent such that the scene images assigned to the different moments are different and the method comprising the following steps:
evaluating a temporal change in the gaze direction and/or in the visual point and/or in an eye movement for identifying different visual events, at least two different types of visual events being recognized and the identified visual events being classified according to their type, dividing a period of time comprising the large number of successive moments into intervals such that an interval, which corresponds to a duration of the respective visual event, is assigned to each of the identified visual events, selecting a moment or proper subset of moments from each of the intervals which are assigned to the respective visual event of at least one selected type of visual event, and for the selected moment or proper subset of moments in each of the intervals, determine a location of the visual point identified in the scene image, respective visual points corresponding to the respective visual events of the respective intervals, and map a respective determined location of the respective visual point for the respective selected moment or proper subset of moments in each of the intervals onto a position in a reference image corresponding to the respective determined location of the respective visual point of the interval in the scene image.