Method for displaying gaze point data based on an eye-tracking unit

• US 9,779,299 B2
• Filed: 01/13/2014
• Issued: 10/03/2017
• Est. Priority Date: 01/26/2009
• Status: Active Grant

• Current Assignee: Tobii Technology AB
• Original Assignee: Tobii Technology AB
• Inventors: Strombom, Johan, Skogo, Marten, Nystedt, Per, Gustafsson, Simon, Elvesjo, John Mikael Holtz, Blixt, Peter
• Primary Examiner(s): Torrente, Richard
• Assistant Examiner(s): Habib, Irfan
• Application Number:
  US14/153,267
• Publication Number:
  US 20140146156A1
• Time in Patent Office: 1,359 Days
• CPC Class Codes: A61B 3/113 for determining or recording eye movement
• CPC Class Codes: G06V 40/19 Sensors therefor
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Abstract

A method of presenting gaze-point data of a subject detected by an eye-tracking unit includes presenting a test scene picture acquired by a camera unit, and displaying shapes on the test scene picture. The shapes represent momentary gaze points of the subject.

Claims

1. A system for presenting gaze-point data comprising:

an eye tracking unit for detecting gaze point data of at least one subject;

a camera unit for viewing a test scene and acquiring a picture representing the test scene;

a display;

a processing unit configured to present the picture on said display, and display shapes on the picture with the shapes representing momentary gaze points, detected by said eye-tracking unit, of the at least one subject, with a size of each shape varying to indicate accuracy of the gaze-point data;

said eye-tracking unit to acquire momentary gaze points over a time interval of non-zero length; and

said processing unit is further configured to display textual annotations specifying a respective time of viewing of the momentary gaze points, display lines or arrows connecting the shapes to specify an order of the momentary gaze points, accumulate the dwell time of one or more subjects in each area of interest, and superimpose shaded areas of interest in accordance with statistical measures of the dwell times of the one or more subjects, with the statistical measures comprising at least one of a mean total dwell time per test subject, a mean duration of each fixation, percentiles of the total dwell time or percentiles of a test population having visited each area of interest.

2. The system of claim 1, wherein the shapes comprise at least one of circles, dots, stars, rectangles and crosses.

3. A system for presenting gaze-point data comprising:

an eye tracking unit for detecting gaze point data of at least one subject;

a camera unit for viewing a test scene and acquiring a picture representing the test scene;

a display; and

a processing unit configured to;

present the picture on the display, and

display shapes on the picture with the shapes representing momentary gaze points, detected by said eye-tracking unit, of the at least one subject, with a size of each shape varying to indicate accuracy of the gaze-point data;

said eye-tracking unit to acquire momentary gaze points over a time interval of non-zero length, with a color of the shapes indicating a dwell time of the at least one subject'"'"'s gaze.

4. The system of claim 3, wherein the shapes represent a sum of dwell times of a plurality of subjects.

5. A system for presenting gaze-point data comprising:

an eye tracking unit for detecting gaze point data of at least one subject;

a camera unit for viewing a test scene and acquiring a picture representing the test scene;

a display;

a processing unit configured to present the picture on the display, and display shapes on the picture with the shapes representing momentary gaze points, detected by said eye-tracking unit, of the at least one subject, with a size of each shape varying to indicate accuracy of the gaze-point data;

said eye-tracking unit to acquire momentary gaze points over a time interval of non-zero length; and

said processing unit is further configured to predefine a plurality of areas of interest in the test scene picture, display lines or arrows connecting the shapes to specify an order of the momentary gaze points, accumulate the dwell time of one or more subjects in each area of interest, and superimpose shaded areas of interest in accordance with statistical measures of the dwell times of the one or more subjects, with the statistical measures comprising at least one of a mean total dwell time per test subject, a mean duration of each fixation, percentiles of the total dwell time or percentiles of a test population having visited each area of interest.

6. The system of claim 5, wherein said processing unit is further configured to construct a video sequence based on the test scene picture in combination with an IR signal source tracking data provided by said eye tracking unit by applying perspective transformations.

7. The system of claim 5, wherein said processing unit is further configured to present a plurality of test scene pictures acquired at regular intervals forming a video sequence, and display shapes on respective frames of the video sequence.