Visual and Auditory Systems

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Visual and Auditory Systems
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Spectrum
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Photometry

• Measuring light

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Colorimetry

• Modeling of color sensation
• Color addition
• Color subtraction
• Image processing(noise removal, edge detection,
  compression, inpainintg etc.)

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Colorimetry
CIE gamut

• CIEstandard observer
• RGBcolor addition
• HSV
• CMYKcolor subtraction
• YIQ, YUVtelevision broadcasting
• YCbCrdigital television transmission, JPEG

HSV gamut
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Colorimetry

• Dichromatism

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The Human Visual System (HVS)
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The Human Visual System (HVS)
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Vision Research

• Physiology
• Psychophysics

Automatic Gain Control
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Vision Research
HermannsGrid
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Vision Research

• HVS is sensitive to
• Local features.
• Spatial frequency (gratings).

Contrast Sensitivity Function
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Signal Representation

• How does the HVS representimages?
• Fourier series.
• Gabor functions.
• Wavelets

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The Ear
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Subjective Hearing

• Properties of the human auditory system are
  utilized in audio compression algorithms such as
  MP3.