Evaluation of Pointing Ray Techniques for Distant Object Referencing in Model-Free Outdoor Collaborative Augmented...

Area of Science:

• Human-Computer Interaction
• Computer Vision
• Augmented Reality

Background:

• Accurate object referencing is crucial for collaborative tasks but challenging at distances.
• Virtual pointing rays in augmented reality (AR) offer a potential solution.
• Existing techniques face limitations in large, model-free outdoor environments.

Purpose of the Study:

• To evaluate the effectiveness of two virtual pointing ray techniques for distant object referencing in model-free AR.
• To compare the Double Ray technique and the Parallel Bars technique.
• To assess performance in a real-world outdoor AR setting.

Main Methods:

• Participants used two AR pointing techniques (Double Ray, Parallel Bars) for object referencing.
• Experiments were conducted in an outdoor AR environment.
• Data was collected involving both pointers and observers.

Main Results:

• The Double Ray technique demonstrated benefits for distant object referencing.
• Effectiveness of the Double Ray technique was reduced by increased pointer workload and human pointing errors.
• Results partially replicated previous findings from simulated AR observer studies.

Conclusions:

• Virtual pointing rays, particularly the Double Ray technique, remain beneficial for distant object referencing in outdoor AR.
• Addressing pointer workload and human error is key to optimizing AR referencing techniques.
• Further research is needed for model-free AR in large outdoor spaces.