HumanComputer IP

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Human-Computer IP

• Sensing and perception

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Vision Auditory Haptic
Communication modes
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Storage
Storage
Perception
Perception
Cognitive Proc.
Psycho-Motor o/p
Cognitive Proc.
Psycho-Motor o/p
Sensing
Sensing
Signalling Level
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Vision Auditory Haptic
Communication modes
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Data int.
Storage
Knowledge /Reasoning
Signal D/C
Perception
V / A / M o/p
Cognitive Proc.
Psycho-Motor o/p
Signal P/U
Sensing
Signalling Level
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Vision Auditory Haptic
Communication modes
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Sensing
Language
Cognitive processing
Memory
Writing, sketching
Functionality of the Human
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Input
Language
Storage
Processing
Output
Functionality of the Human
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VisionHearingTouch
SMSTMLTM
Language
Cognitive Engine
Psycho-Motor Output
Functionality of the Human
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Vision the Eye

• Pupil, iris, cornea
• Retina, fovea, nerve cord
• Cones, at the fovea colour and detail
• Rods, on retina low light intensity
• X-cells at the fovea patterns
• Y-cells elsewhere movement

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Visual Sense

• Visual sense the detection of visual signals
• Visual acuity ability to perceive detail
• Shape size and distance law of constancy
• Brightness reaction to luminance
• Contrast diff. Between object and background
• Dim conditions peripheral vision
• Colour hue, intensity and saturation
• Visual persistence

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Visual Perception

• Visual perception the detection of a stimulus
• The Icon
• Visual perception the interpretation of a signal
• The perceptron
• Prior knowledge of objects
• The Schema

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Properties of visual perception
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The search for patterns
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O O
V
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The 3-dimensional perspective
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The cultural effect
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The effect of Context
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• Gestalt principles of perceptual organization

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the 'selectivity' of perception foregrounding
and backgrounding
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The principle of proximity
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The principle of similarity
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The principle of good continuity
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The principle of Closure
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The principle of smallness
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The principle of surroundedness
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The principle of symmetry
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Reading

• Jerky movement of the eye
• Saccades and fixations
• Fixations account for 94 of reading time
• Regression could become a habit in reading
• Adults read about 250 words/min.
• Words are scanned as a shape
• Negative contrast provides higher luminance,
  hence improves acuity.

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Hearing

• Sound characteristics pitch (frequency)
• Sound characteristics loudness (amplitude or
  energy)
• Sound characteristics timbre (harmonics)
• Primary input speech carries verbal info
• Able to detect direction and motion
• Attention the ability to be selective

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Touch

• Touch haptic perception
• Mechanoreceptors to detect pressure
• Thermoreceptors to detect heat
• Receptors for pain (intense pressure of heat.)
• Receptors for acceleration