Why Study Perception
Why study perception? Human Perception and VR
• Important to understand human abilities and limits • Determine appropriate range for input and output (frame rate, resolution, etc) • Understand that different senses have different ranges and abilities • Determine appropriate sensory channel to use to transfer information • Avoid sickness and injury
Human Perceptual Systems
• • • • • • Visual Vestibular Auditory Olfactory Haptic Gustatory
Visual Perception
• Visual information is often considered the primary feature of virtual environments, we gather large amounts of information with vision in everyday life • The visual channel generally can process much larger bandwidth than other senses • This channel is also sensitive to very small anomalies, especially when motion is involved
Tips on Visual Perception
• Wider FOV is usually better • Use caution with large amounts of disparity • Use caution with motion, especially when it is fast, or wide FOV is used, or looming is involved • Consider that some simple depth cues may be much easier or cheaper to implement and result in only a slight decline in performance
Auditory Perception
• Audio in VEs is often absent or implemented poorly (only as an afterthought). But the entertainment industry recognizes that sound is vital to creating ambience and emotion. • Sound can also be used to transmit useful and important information • Senses such as visual must be directed at the stimulus to receive information – the auditory channel is continually receiving information. • When sound is done poorly, the brain notices!
1
Vestibular System
• Senses movements/accelerations of the head/body. • Primary organs used are:
– Three vestibular canals (rotations) – Otolith organs: Utricle and saccule (gravity and linear accelerations) – These organs are connected Your ear is not just a microphone!
Image from www.kyent.com/ hearing_loss_types.htm
Vestibular Sense
• We generally use information from this sense
• Important to understand human abilities and limits • Determine appropriate range for input and output (frame rate, resolution, etc) • Understand that different senses have different ranges and abilities • Determine appropriate sensory channel to use to transfer information • Avoid sickness and injury
Human Perceptual Systems
• • • • • • Visual Vestibular Auditory Olfactory Haptic Gustatory
Visual Perception
• Visual information is often considered the primary feature of virtual environments, we gather large amounts of information with vision in everyday life • The visual channel generally can process much larger bandwidth than other senses • This channel is also sensitive to very small anomalies, especially when motion is involved
Tips on Visual Perception
• Wider FOV is usually better • Use caution with large amounts of disparity • Use caution with motion, especially when it is fast, or wide FOV is used, or looming is involved • Consider that some simple depth cues may be much easier or cheaper to implement and result in only a slight decline in performance
Auditory Perception
• Audio in VEs is often absent or implemented poorly (only as an afterthought). But the entertainment industry recognizes that sound is vital to creating ambience and emotion. • Sound can also be used to transmit useful and important information • Senses such as visual must be directed at the stimulus to receive information – the auditory channel is continually receiving information. • When sound is done poorly, the brain notices!
1
Vestibular System
• Senses movements/accelerations of the head/body. • Primary organs used are:
– Three vestibular canals (rotations) – Otolith organs: Utricle and saccule (gravity and linear accelerations) – These organs are connected Your ear is not just a microphone!
Image from www.kyent.com/ hearing_loss_types.htm
Vestibular Sense
• We generally use information from this sense