Pupil tracking system and method, and digital display device and digital image rendering system and method using same

A non-transitory computer-readable medium having instructions stored thereon to be automatically implemented by one or more processors to reduce jitteriness or increase stability in a perceived light field image projected via a light field display by:

• sequentially acquiring a user pupil location;
• digitally computing from at least some said sequentially acquired user pupil location a velocity of said user pupil location over time;
• digitally comparing said velocity with a designated threshold pupil velocity, wherein velocities below said designated threshold are associated with a relatively fixated state;
• digitally rendering the light field image via the light field display in accordance with a maintained spatially-defined light field viewing zone geometry digitally defined in respect of a previously acquired user pupil location to project the light field image within a maintained spatially-defined light field viewing zone in accordance with said previously acquired user pupil location so to reduce jitteriness or increase stability of the perceived light field image, unless said velocity is above said designated threshold pupil velocity;
• and
• upon said velocity exceeding said designated threshold pupil velocity, digitally adjusting a rendering geometry of the light field image via the light field display so to correspondingly adjust said maintained spatially-defined light field viewing zone geometry to project the light field image within an adjusted spatially-defined light field viewing zone in accordance with a newly acquired user pupil location.

A digital display device operable to automatically adjust a light field image to be rendered thereon, the device comprising:

• a light field display;
• a hardware processor;
• and
• a pupil tracking engine operable by said hardware processor to automatically:
• receive as input sequential user pupil locations;
• digitally compute from at least some said sequential user pupil locations a velocity of said user pupil location over time;
• and
• digitally compare said velocity with a designated threshold pupil velocity, wherein velocities below said designated threshold are associated with a relatively fixated state;
• wherein said hardware processor is operable to reduce jitteriness or increase stability in a perceived light field image by:
• digitally rendering the light field image via the light field display in accordance with a maintained spatially-defined light field viewing zone geometry digitally defined in respect of a previously acquired user pupil location to project the light field image within a maintained spatially defined light field viewing zone in accordance with said previously acquired user pupil location so to reduce jitteriness or increase stability of the perceived light field image, unless said velocity is above said designated threshold pupil velocity;
• and
• upon said velocity exceeding said designated threshold pupil velocity, digitally adjusting a rendering geometry of the light field image via the light field display so to correspondingly adjust said maintained spatially-defined light field viewing zone geometry to project the light field image within an adjusted spatially-defined light field viewing zone in accordance with a newly acquired user pupil location.